The Kynix Components

I IntroductionInfrared sensor circuits have been widely used in modern life. How come? Due to its characteristics of low power consumption, high reliability, and small mutual interference. For example, a bank opens and closes automatically. When a person walks into the bank, the door opens automatically, and the door closes after leaving. Or the faucet in restaurants such as KFC. When our hands placed under the faucet, the water automatically flows out. And when our hands leave the faucet, the water automatically shuts off. All the above scenarios apply infrared sensor technology.This blog will lead you to understand LM358 infrared sensor circuits that bring convenience to our lives.CatalogI IntroductionII Circuit Sructure and Woking PrincipleIII Circuit Design3.1 Infrared Sensor Circuit3.2 Sampling Comparator Circuit3.3 Test ResultIV Ways for Infrared Sensor Circuit Debugging4.1 Observation4.2 Resistance4.3 Basic Circuit AnalysisV ConclusionComponent DatasheetFAQOrdering & QuantityII Circuit Sructure and Woking PrincipleThe infrared sensor circuit is composed of the following circuits:Infrared Sensor Circuit. Infrared sensor circuit with infrared transmitting tube D1 and infrared receiving tube D2 as the core;Sampling Comparator Circuit. Sampling comparator circuit with adjustable resistance R3 and general operational amplifier LM358 as the core;Sound Output and Display Circuit. A sound output and display circuit with transistor 9012, V1, V2, buzzer Y1, and light-emitting diode D3 as the core components.The infrared sensor circuit can also realize the situation below. When the hand is close to the infrared transmitting tube and the infrared receiving tube: the buzzer will sound and the LED light will light up. When the hand is removed, the sound will stop and the LED light will go out. From this, we can find that the sensitivity of this circuit is very high. The infrared sensor circuit is applied in many life scenarios. And it is a circuit that circuit designers must master.III Circuit DesignWhen we turn on the 5V power supply to the circuit, the infrared emission tube D1 turns on. If there is no obstruction, the infrared receiving tube D2 does not receive infrared light. And the infrared receiving tube D2 is still in the reverse blocking state. The voltage of the negative pole of the infrared receiving tube D2 is still high. And sent to the 3 pins of LM358. When the infrared transmitting tube D1 is approached by hand, the infrared light is blocked. And it reflected to the infrared receiving tube D2. After the infrared receiving tube D2 receives the infrared light, it is turned on immediately. So the voltage of the negative electrode of the infrared receiver tube D2 drops drastically. And this voltage is sent to the 3 pins of the LM358.3.1 Infrared Sensor CircuitWhen we turn on the 5V power supply to the circuit, the infrared emission tube D1 turns on. If there is no obstruction, the infrared receiving tube D2 does not receive infrared light. And the infrared receiving tube D2 is still in the reverse blocking state. The voltage of the negative pole of the infrared receiving tube D2 is still high. And sent to the 3 pins of LM358. When the infrared transmitting tube D1 is approached by hand, the infrared light is blocked. And it reflected to the infrared receiving tube D2. After the infrared receiving tube D2 receives the infrared light, it is turned on immediately. So the voltage of the negative electrode of the infrared receiver tube D2 drops drastically. And this voltage is sent to the 3 pins of the LM358.3.2 Sampling Comparator CircuitThe voltage of pin 2 of LM358 depends on the adjustable resistor R3. We can adjust the adjustable resistor R3 to a suitable value (the voltage is about 2.5V. So that it can be ensured that the voltage of pin 3 of LM358 is greater than that of pin 2 of LM358. When V+>V-, pin 1 of LM358 will output a high level. And this will be sent to the bases of PNP transistors V1 and V2 through the current limiting resistor R4, causing the transistors V1 and V2 to be cut off. The buzzer Y1 does not sound, and the LED D3 goes out.If the voltage of pin 3 of LM358 drops to a voltage lower than that of pin 2，it will be a different situation. When V+ <V-, pin 1 of LM358 will output low level and send it through current limiting resistor R4 to PNP transistors V1 and V2. The base makes the transistors V1 and V2 conductive.3.3 Test ResultWith the above circuit design and analysis, the circuit is ready for the sensing effect. When the hand moves to the top of the infrared emitter D1 and infrared receiver D2, the buzzer sounds and the light-emitting diode lights up. When the hand leaves the top of D1 and D2, the buzzer stops sounding and the light-emitting diode goes out. So far, this infrared sensing circuit design has achieved the effect we wanted!IV Ways for Infrared Sensor Circuit Debugging4.1 ObservationCheck whether each component is installed correctly. Here, we should pay special attention to the following points:Positive and negative poles of infrared emitting diode;Positive and negative poles of infrared receiving diode;The pin sequence of LM358;The pin sequence of the transistor 9012.4.2 ResistanceCheck whether the line is connected normally according to the schematic diagram. Here, a multimeter can be used to detect whether each circuit is on. We mainly check the following two places:Check whether each GND is connected to the negative terminal of the power supply;Check whether each VCC is connected to the power connector.4.3 Basic Circuit Analysis4.3.1 Maintenance of Infrared Transmitting CircuitThe infrared light emitted by the infrared emission circuit is invisible to human eyes. How can we see infrared light? You can use the camera function of your mobile phone. During the maintenance process, you can use the mobile phone to check whether the infrared light-emitting circuit is normal. Here, we mainly check the following two places:Resistance of current limiting resistor;Whether the positive and negative polarity of the infrared LED is installed correctly.4.3.2 Maintenance of Infrared Receiving CircuitUse a multimeter to measure the cathode of the infrared receiving diode. Here, we need to observe two voltage values:Observe the voltage value (whether it is a low level) when the infrared emission tube is placed by hand;The voltage value when the infrared receiver tube is removed by hand (whether it is a high level).4.3.3 Maintenance of Voltage Sampling CircuitTest whether the voltage value of the third leg of the adjustable resistor R3 is around 2.5V. Also, when rotating the adjustable resistor, is the voltage value variable?4.3.4 Maintenance of Voltage Comparator CircuitMainly use a multimeter to measure the voltage of pin 1 of LM358. Here, we need to observe two voltage values:Observe the voltage value of pin 1 of LM358 (whether it is a low level) when the infrared transmitter tube is placed by hand;Observe the voltage value of pin 1 of LM358 (whether it is a high level) when the hand is removed from the infrared receiving tube.Figure 1. LM358 Comparator Circuit4.3.5 Maintenance of Alarm Circuit and LED Display CircuitYou can directly add the power ground to the base of V1 and V2 to see if the alarm and LED are on. The damaged components may be 9012 and light-emitting diodes.V ConclusionThis blog has designed a simple and usable infrared sensor circuit. The design of it not only based on the LM358 chips and technology but also using the knowledge of digital and analog circuits. It can also increase the radiation distance by adjusting the resistance of the potentiometer so that the circuit can be used as an alarm.Of course, this circuit still has some defects. This LM358 infrared sensor circuit is considered to be used in a relatively good external environment. That means, there is not much research on the safety and stability of the circuit, and some protective components are omitted. However, it can be seen from the design process and debugging method of the entire circuit that the circuit is very simple and easy to understand whether it is the basic principle, the complexity of the chip used, the number of various components, and the final wiring layout. Moreover, the devices are very commonly used, cheap, and worthy of promotion.Component Datasheet LM358 DatasheetFAQWhat is lm358 op amp?LM358 is a dual op-amp IC integrated with two op-amps powered by a common power supply. It can be considered as one half of LM324 Quad op-amp which contains four op-amps with common power supply. The differential input voltage range can be equal to that of power supply voltage.What is lm358 used for?LM358 can be used as transducer amplifier, DC gain block etc. It has large dc voltage gain of 100dB. This IC can be operated on wide range of power supply from 3V to 32V for single power supply or from ±1.5V to ±16V for dual power supply and it also support large output voltage swing.Why lm358 is used in IR sensor?IC Lm358 is used as a comparator when IR receiver senses IR radiations. When the o/p of lm358 goes high, then LED connected at the o/p turns ON. The output pin of the IC LM358 is used to interface with PIC microcontroller.How does an lm358 work?IC LM358– LM358 consists of two independent, high gain operational amplifiers in one package. Important feature of this IC is that we do not require independent power supply for working of each comparator for wide range of power supply. LM358 can be used as transducer amplifier, DC gain block etc.What is the difference between lm358n and lm358p?The suffix denotes the manufacturer's packaging code. The 'N' is used by most manufacturers for the plastic 8-pin package. The 'P' is used by a few manufacturers for the plastic 8-pin package. Raven Luni is right, there is NO difference between the two devices, just the mfgrs.How do I know if my lm358 op amp is broken?Measure the DC voltage at the +input. then measure the DC voltage at the output. if the results are significantly different, the opamp is most likely shot. if they are the same, the opamp is most likely ok and the problem is something else.What is the difference between lm386 and lm358？The LM386 is a complete audio power amplifier, the LM358 is a dual operational amplifier. When using the LM358 e.g. as a pre-amplifier, you will have to supply a separate power amplifier.What is a dual op amp?With a dual supply op amp, the V+ terminal of the op receives a positive voltage and the V- terminal connects to negative voltage. Therefore, any input signal fed into the op amp can swing from the positive voltage supply to the negative voltage supply.What is LM series?The following is a list of LM-series integrated circuits. ... The LM series originated with integrated circuits made by National Semiconductor. The prefix LM stands for linear monolithic, referring to the analog components integrated onto a single piece of silicon.How to import lm358 into LTspice?1. Download model file and unzip.2. Place .cir file in same folder as schematic.3. Place "opamp2" symbol on schematic.4. Change "opamp2" value to LMX58_LM2904.5. Place directive on schematic ". lib LMx58_LM2904. CIR" without quotes.

UC3845 is a high-performance fixed-frequency current-mode controller, designed for offline and DC-to-DC converter applications, providing designers with a cost-effective solution that requires minimal external components.  These integrated circuits have a fine-tunable oscillator, precise duty cycle control, temperature compensation reference, high gain error amplifier, current sampling comparator and high current totem pole output. It is an ideal devices for driving power MOSFETs.CatalogUC3845 PinoutUC3845 Functional Block DiagramUC3845 FeaturesUC3845 EquivalentsUC3845 ApplicationsUC3845 PackageUC3845 ManufacturerComponent DatasheetOrdering & Quantity UC3845 PinoutPin Functions:PinTypeDescription NameSOIC, CDIP, PDIP (8)SOIC, CFP (14)LCCC (20)COMP112OError amplifier compensation pin. Connect external compensation components to this pin to modify the error amplifier output. The error amplifier is internally current-limited so the user can command zero duty cycle by externally forcing COMP to GROUND.GROUND5913GAnalog ground. For device packages without PWRGND, GROUND functions as both power ground and analog ground.PWRGND-812GPower ground. For device packages without PWRGND, GROUND functions as both power ground and analog groundISENSE357IPrimary-side current sense pin. Connect to current sensing resistor. The PWM uses this signal to terminate the OUTPUT switch conduction. A voltage ramp can be applied to this pin to run the device with a voltage-mode control configuration.NC-2, 4, 6, 131, 3, 4, 6, 8, 9, 11, 14, 16, 19-Do not connectOUTPUT61015OOUTPUT is the gate drive for the external MOSFET. OUTPUT is the output of the on-chip driver stage intended to directly drive a MOSFET. Peak currents of up to 1 A are sourced and sunk by this pin. OUTPUT is actively held low when VCC is below the turnon threshold.RT/CT4710I/OFixed frequency oscillator set point. Connect timing resistor, RRT, to VREF and timing capacitor, CCT, to GROUND from this pin to set the switching frequency. For best performance, keep the timing capacitor lead to the device GROUND as short and direct as possible. If possible, use separate ground traces for the timing capacitor and all other functions. The frequency of the oscillator can be estimated with the following equations:fosc=1.72/RRT × CCT                                                          (1) where fosc is in Hertz, RRT is in Ohms and CCT is in Farads. Never use a timing resistor less than 5 kΩ. The frequency of the OUTPUT gate drive of the UCx842 and UCx843, fSW, is equal to fOSC at up to 100% duty cycle; the frequency of the UCx844 and UCx845 is equal to half of the fOSC frequency at up to 50% duty cycle.VC-1117IBias supply input for the output gate drive. For PWM controllers that do not have this pin, the gate driver is biased from the VCC pin. VC must have a bypass capacitor at least 10 times greater than the gate capacitance of the main switching FET used in the design.VCC71218IAnalog controller bias input that provides power to the device. Total VCC current is the sum of the quiescent VCC current and the average OUTPUT current. Knowing the switching frequency and the MOSFET gate charge, Qg, the average OUTPUT current can be calculated from:IOUTPUT = Qg × fSW                                                          (2) A bypass capacitor, typically 0.1 µF, connected directly to GROUND with minimal trace length, is required on this pin. An additional bypass capacitor at least 10 times greater than the gate capacitance of the main switching FET used in the design is also required on VCC.VFB235IInverting input to the internal error amplifier. VFB is used to control the power converter voltage-feedback loop for stability.VREF81420O5-V reference voltage. VREF is used to provide charging current to the oscillator timing capacitor through the timing resistor. It is important for reference stability that VREF is bypassed to GROUND with a ceramic capacitor connected as close to the pin as possible. A minimum value of 0.1-µF ceramic is required. Additional VREF bypassing is required for external loads on VREF.UC3845 Functional Block DiagramUCx844 and UCx845 Block Diagram, ToggleUC3845 FeaturesOptimized for off-line and DC-to-DC convertersLow start-up current (< 1 mA)Automatic feedforward compensationPulse-by-pulse current limitingEnhanced load-response characteristicsUndervoltage lockout with hysteresisDouble-pulse suppressionHigh-current totem-pole outputInternally trimmed bandgap referenceUp to 500-kHz operationError amplifier with low output resistanceUC3845 EquivalentsUC3845 ApplicationsSwitching regulators of any polarityTransformer-coupled DC-DC convertersUC3845 PackageUC3845 ManufacturerTexas Instruments Incorporated designs and manufactures analog technologies, digital signal processing (DSP) and microcontroller (MCU) semiconductors. TI is a leader in semiconductor solutions for analog and digital embedded and applications processing. A global semiconductor company, TI innovates through design, sales and manufacturing operations in more than 30 countries.Component DatasheetUC3845 Datasheet

1N914 is a small signal diode capable of handling low voltage and low current. The diode can be switched at high speed and therefore normally used in switching applications and not in rectifier applications. This blog covers almost every information about 1N914 including pinout, equivalents, datasheet, difference between 1N914 and 1N4148, applications etc. Hope it's helpful to you guys!Catalog1N914 Pinout1N914 Features1N914 Equivalent1N914 Absolute Ratings1N914 vs 1N41481N914 CAD Models1N914 Applications1N914 Package1N914 Popularity by Region1N914 ManufacturerComponent DatasheetFAQ1N914 Pinout1N9141N914 Pinout Pin NameDescriptionAnodeCurrent always Enters through AnodeCathodeCurrent always Exits through Cathode1N914 FeaturesFast switching DiodePeak repetitive Reverse voltage is 100VRMS reverse voltage is 75VPeak forward surge current is 4AForward continuous current If 300mAReverse recovery time 8nsAvailable in DO-35 Package1N914 EquivalentPart NumberDescriptionManufacturer1N914.TRDIODES0.2A, 100V, SILICON, SIGNAL DIODE, DO-35Texas Instruments1N4446136DIODESDIODE 0.2 A, 75 V, SILICON, SIGNAL DIODE, DO-35, Signal DiodeNXP Semiconductors1N914BT50RDIODES0.2 A, SILICON, SIGNAL DIODE, DO-35Fairchild Semiconductor Corporation1N914-GDIODESRectifier Diode, 1 Element, 0.15A, 75V V(RRM), Silicon, DO-35, GREEN, GLASS PACKAGE-2Sensitron Semiconductors1N4446116DIODESDIODE 0.2 A, 75 V, SILICON, SIGNAL DIODE, DO-35, Signal DiodeNXP Semiconductors1N914 Absolute Ratings1N914 vs 1N41481N914 and 1N4148 diodes can be used interchangeably.  1N4148 is considered as advanced version of 1N914 but technically there is not much difference. Only difference is that 1n4148 has low leakage current than 1n914, but even for some manufacturers the leakage current is same for both the diodes. For a number of devices digikey (notably Fairchild) lists the leakage current for the 1N4148 as 5 µA, the same as the 1N914. But for others (e.g. NXP) the leakage current is only 25 nA. Which would make the 1N4148 a better alternative to the 1N914.1N914 CAD ModelsPart SymbolFootprint3D Model1N914 ApplicationsCan be used to prevent reverse polarity problemHalf Wave and Full Wave rectifiersUsed as a protection deviceCurrent flow regulators1N914 Package1N914 Popularity by Region1N914 ManufacturerON Semiconductor is driving energy efficient innovations, empowering customers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power supply applications.Component Datasheet1N914 DatasheetFAQWhat is 1n914 diode?The 1N914 is a small signal diode which can handle low voltage and low current. The diode can switch at high speed and hence normal used in switching applications and not in rectifier applications.What is a signal diode used for?Signal diodes are typically used to process information (electrical signals) in circuits, so they are only required to pass small currents of up to 100mA. General purpose signal diodes such as the 1N4148 are made from silicon and have a forward voltage drop of 0.7V.What is the 1n4148 diode used for?1N4148 is a standard diode made up of silicon and is used for extremely fast switching operations. It has two modes of operation named as: Forward Biased. Reverse Baised.What happens when two zener diodes are connected in parallel?If two Zener diodes are connected in parallel, the one with the lower Zener voltage will conduct most of the Zener current, possibly exceeding its allowable power dissipation. 

1N4148 Diode is a fast switching diode. It is fabricated in planar technology, and encapsulated in hermetically sealed leaded glass SOD27 (DO-35) packages. In the blog today, we 'll introduce 1N4148 systematically from its pinout, features, applications to its equivalents, package, etc, some frequent asked questions are also listed below at the bottom of the page, thanks for reading and hope this is helpful!TOP2 Electronic projects with Diode 1N4148.Catalog1N4148 Description1N4148 Pin Configuration1N4148 Features1N4148 Applications1N4148 CAD Models1N4148 Package Outline1N4148 Equivalent Diodes1N4148 Popularity by Region1N4148 Market Price AnalysisComponent DatasheetFAQOrdering & Quantity1N4148 DescriptionA diode is a device which allows current flow through only one direction. That is the current should always flow from the Anode to cathode. The cathode terminal can be identified by using a grey bar as shown in the picture above. For 1N4148 Diode, the maximum current carrying capacity is 300mA it can withstand peaks up to 2A. The speciality of this diode is its fast recovery time of 8ns at a forward current of 10mA, hence this diode is used in places where fast switching are involved.1N4148 Pin Configuration1N41481N4148 Pinout Pin NameDescriptionAnodeCurrent always Enters through AnodeCathodeCurrent always Exits through Cathode 1N4148 FeaturesFast switching DiodePeak repetitive Reverse voltage is 100VRMS reverse voltage is 75VPeak forward surge current is 2AForward continuous current If 300mAReverse recovery time 8nsAvailable in DO-35 Package1N4148 ApplicationsCan be used to prevent reverse polarity problemProtect Power electronic switches that are operating with high switching frequency.Half Wave and Full Wave rectifiersUsed as a protection deviceCurrent flow regulators1N4148 CAD ModelsPart SymbolFootprint3D Model1N4148 Package Outline 1N4148 Equivalent Diodes1N914, IN914A, 1N914B, 1N916, 1N916A, 1N916B, 1N4448, 1N4448WS, 1N4448W, 1N4148WS1N4148 Popularity by Region1N4148 Market Price AnalysisComponent Datasheet1N4148 DatasheetFAQIs 1n4148 a Schottky diode?First 1N4148 isn't Schottky diode. It's true it is a switching diode (fast) but not Schottky.What is a switching diode used for?A switching diode is suitable for switching a small signal of up to 100 mA, acting as a rectifier. In contrast, a rectifier diode is used for AC line rectification (from alternating current to direct current). Switching diodes are designed to handle a voltage of less than tens of volts.What do 4148 and N in diode 1N4148 mean?XNXXXX, this is the representation of semi-conducting bulk components of the American Standards Association. XXXX represents the model number, usually a string of numbers.N means PN junction. The number in front represents the number of PN junctions. For example, 1N4148 means that it has only one PN junction (ie diode), and 4148 is the model number. Similar to 1N4007, 1N4734 and the like are diodes.2N means that there are two PN junctions, which are triodes or field effect transistors. For example, common 2N3904, 2N2222 and the like are triodes. 2N5515 is a field effect tube (N-channel JFET)Many 4N and 6N are photocouplers, such as 4N25, 6N137 and so on.What is the difference between 1N4148 and 1N4007?1N4148 is a commonly used switching diode (normal forward current If: 150mA, maximum repetitive peak voltage Umax: 100V, reverse recovery time trr: 4ns). IN4007 is also a common rectifier diode (positive power constant forward current If:1A, maximum repetitive peak voltage Umax:1000V). So they are diodes with different characteristics.What are the functions of the diode 1N4148 in the circuit?It plays the role of detection, freewheeling and rectification of small currentsHow do I know if my diode 1n4148 is broken?Identify the positive and negative poles of the 1n4148 diode, one end with a white line is the negative pole, and the other end is the positive pole.Set the knob on the multimeter to the on-off capacity position, and insert the red and black test leads into the correct position of the multimeter.Connect the red test lead to the anode of the diode and the black test lead to the cathode. Then observe the reading, if it overflows (that is, it shows 1), the diode is broken. If there is a reading, exchange the test leads. If there is a reading but not overflow, the diode is broken.What is the difference between IN4148 and LL4148?LL4148 usually refers to the glass sealed cylindrical LL-34 package (SMD, no leads).1N4148 usually refers to DO-35 glass seal, axial pin, plug-in. It can be braided or in bulk. 

Product OverviewThe KBPC5010 is one massive bridge rectifier. Bridge rectifiers are used to convert alternating current (AC) to direct current (DC). They are constructed from at least 4 diodes and are a major component of most basic AC/DC power supplies. This specific bridge rectifier can handle up to 50A and a peak reverse voltage of up to 1000V. The metal casing has a hole in the middle – ideal for mounting it. This blog will introduce KBPC5010 systematically from its features, pinout, wiring diagram to its specifications, applications, also including KBPC5010 datasheet and so much more. CatalogKBPC5010 FeaturesMechanical FeatureKBPC5010 PinoutKBPC5010 Wiring DiagramKBPC5010 ApplicationKBPC5010 SpecificationKBPC5010-G VS GBPC5010-GKBPC5010 ManufacturerKBPC5010 DatasheetUsing WarningsKBPC5010 FAQ KBPC5010 FeaturesDiffused junctionHigh dielectric strengthHigh surge currentLow reverse leakage currentLow power loss, high efficiencyElectrically isolated metal case for maximum heat dissipationHigh reliabilityLow forward voltage drop Mechanical FeatureCase Metal CaseEpoxy UL94V-0 rate flame retardantTerminals plated .25" (6.35 mm). FastonPolarity Polarity symbols marked on caseMounting position Bolt down on heat-sink with silicon thermal compound between bridge and mounting surface for maximum heat transfer efficiency. KBPC5010 PinoutThe following figure is the diagram of KBPC5010 pinout. KBPC5010 Pinout KBPC5010 Detail KBPC5010 Wiring DiagramThe following figure is the diagram of KBPC5010 wiring diagram. KBPC5010 Wiring Diagram KBPC5010 ApplicationMains Rectification KBPC5010 SpecificationAttributeValuePeak Average Forward Current50ABridge TypeSingle PhasePeak Reverse Repetitive Voltage1000VMounting TypeThrough HolePackage TypeKBPCPin Count4Diode TechnologySilicon JunctionDiode TypeSilicon JunctionConfigurationSinglePeak Non-Repetitive Forward Surge Current500AMaximum Operating Temperature150Minimum Operating Temperature-55°CPeak Forward Voltage1.1VPeak Reverse Current10µALength28.8mmDimensions28.8 x 28.8 x 11.23mmWidth28.8mmHeight11.23mm KBPC5010-G VS GBPC5010-G KBPC5010-GGBPC5010-GCategoryDiscrete Semiconductor ProductsDiodes - Bridge RectifiersDiscrete Semiconductor ProductsDiodes - Bridge RectifiersMfrComchip TechnologyComchip TechnologyPackageTrayTrayPart StatusActiveActiveDiode TypeSingle PhaseSingle PhaseTechnologyStandardStandardVoltage - Peak Reverse (Max)1 kV1 kVCurrent - Average Rectified (Io)50 A50 AVoltage - Forward (Vf) (Max) @ If1.1 V @ 25 A1.1 V @ 25 ACurrent - Reverse Leakage @ Vr5µA @ 1000 V10µA @ 1000 VOperating Temperature-55°C ~ 150°C (TJ)-55°C ~ 150°C (TJ)Mounting TypeQC TerminalQC Terminal KBPC5010 ManufacturerIncepted in the year 1990, Diode House is the renowned wholesale trader of a superb quality collection of Industrial Electronics Components items Zener Diode, Diode, Resistor, SMD Resistor, Capacitor, Intergrated Circuit(IC), trimpot's, Transistor, LED, Tantlum, MOV, NTC, JHD Display etc and much more. KBPC5010 DatasheetYou can download this datasheet for KBPC5010–Datasheet from the link given below: KBPC5010 Datasheet Using WarningsNote: Please check their parameters and pin configuration before replacing them in your circuit. KBPC5010 FAQWhat is KBPC5010?The KBPC5010 is one massive bridge rectifier. Bridge rectifiers are used to convert alternating current (AC) to direct current (DC). This specific bridge rectifier can handle up to 50A and a peak reverse voltage of up to 1000V. The metal casing has a hole in the middle – ideal for mounting it. What causes bridge rectifier failure?The common reasons for a diode failure are excessive forward current and a large reverse voltage. Usually, large reverse voltage leads to a shorted diode while overcurrent makes it fail open. What does a silicon bridge rectifier do?A Bridge rectifier is an Alternating Current (AC) to Direct Current (DC) converter that rectifies mains AC input to DC output. Bridge Rectifiers are widely used in power supplies that provide necessary DC voltage for the electronic components or devices. How does a bridge rectifier work?Bridge Rectifiers use four diodes that are arranged cleverly to convert the AC supply voltage to a DC supply voltage. The output signal of such a circuit is always of the same polarity regardless of the polarities of the input AC signal. The current will flow through the load resistor via the two forward-biased diodes. How do you know if you have a bad rectifier?You'll note signs right away like poor starts, fluctuating meter readings, and dimmed headlights. around 13 volts, the bike will start to drain the battery. When this happens, it's only a matter of time before the engine stops completely. What are the advantages of bridge rectifier?A bridge rectifier has a higher efficiency than a half-wave rectifier. But in some cases, the efficiency of the center-tapped full-wave rectifier and the bridge rectifier is the same. A smooth output is obtained from a bridge rectifier than the half-wave rectifier. Does a bridge rectifier increase voltage?As most bridge rectifiers use silicon diodes, this drop will be a minimum of 1.2 volts and will increase as the current increases. Accordingly the maximum voltage output that can be achieved is a minimum of 1.2 volts down on the peak voltage of the AC input. Which rectifier is more efficient?The bridge rectifier provides significant advantages over the half wave rectifier, allowing better smoothing and better efficiency. Although the half wave rectifier finds applications in signal and peak detection, it is not widely used in power rectification. How do you calculate the current output of a bridge rectifier?The current can be measured at the output of the secondary transformer coil and is usually available on the data sheet for the transformer. This value is measured in amperes, or amps. Multiply the current value, I, by the resistance value, R. Multiply the resulting number by 150%. What is the application of rectifier?A rectifier is a device that converts an oscillating two-directional alternating current (AC) into a single-directional direct current (DC). Rectifiers can take a wide variety of physical forms, from vacuum tube diodes and crystal radio receivers to modern silicon-based designs.

I DescriptionAD620 is a low-power, high-precision instrumentation amplifier. Based on the information provided by the AD company, this blog introduces the characteristics and typical usage of AD620. Besides, this blog also introduces the application of AD620. The applications are mainly about photoelectric detection, ultrasonic testing, etc.Figure 1. AD620I DescriptionII IntroductionIII AD620 Pinout and Working PrincipleIV AD620 Typical UsageV AD620 Application5.1 Application in Photoelectric Detection5.2 Application in Ultrasonic TestingVI ConclusionFAQOrdering & QuantityII IntroductionAD620 is a low-power, high-precision instrumentation amplifier. And it can set the amplification factor from 1 to 1000 with only an external resistor. It is small in size, in an 8-pin SOIC or DIP package; the power supply range is ±2.3V~±18V; the maximum power supply current is only 1.3mA.AD620 has good DC and AC characteristics. Its maximum input offset voltage is 50μV, the maximum input offset voltage drift is 1μV/℃, and the maximum input bias current is 2.0nA.When G=10, its common-mode rejection ratio is greater than 93dB. The input voltage noise is at 1kHz, the peak-to-peak value of the input voltage noise is 0.28μV in the range of 0.1Hz~10Hz, and the input current noise is When G=1, its gain bandwidth is 120kHz, and the settling time is 15μs.In general, the characteristics of AD620 can be summarized as follows:AD620 can ensure the performance indicators required for high-gain precision amplification. For example, low offset voltage, low offset voltage drift, and low noise, etc.;With only one external resistor, the magnification can be set from 1 to 1000;Small size, with 8 pins;Low power consumption and its maximum supply current are 1.3mA.III AD620 Pinout and Working Principle　　The pin of AD620 is shown as in Fig. 2, its structure diagram is shown as in Fig. 3.　　　　Figure 2. AD620 Pinout　　Figure 3. AD620 Structure DiagramAD620 is a monolithic instrument amplifier. It is developed on the basis of the improvement of the traditional three-op amplifier combination.The input transistors Q1 and Q2 provide the only bipolar differential input. Due to the internal super β processing, its input offset current is 10 times lower than normal.Through the feedback of the Q1-A1-R1 loop and the Q2-A2-R2 loop, the collector currents of Q1 and Q2 are kept constant. Thus, the input voltage is equivalent to the two ends of the external resistor Rg. And the differential amplification factor from the input to the A1/A2 output is G=(R1+R2)/Rg+1.The unity gain subtractor composed of A3 eliminates any common-mode components. And then it produces a single-channel output related to the potential of the REF pin.The value of Rg also determines the transconductance of the previous stage op amp. When Rg decreases, the amplification factor increases. And the transconductance to the input transistor gradually increases. This has obvious advantages: the increase in the amplification factor increases the open-loop gain. Thus, the error related to gain is reduced. The gain-bandwidth product determined by C1, C2 and the pre-op amp transconductance increases. Thus, the frequency response is improved. The input voltage noise is mainly determined by the collector current of the input transistor and the base resistance. And the input voltage noise is reduced to  .The internal gain resistors R1 and R2 are accurately determined as 24.7kΩ. In this case, the operational amplifier gain is accurately determined by Rg.　　G=49.4kΩ/Rg+1   or   Rg=49.4kΩ/(G-1)IV AD620 Typical Usage(1) The input bias current is the current required to bias the input transistor of the op amp, and it must have a return loop. Therefore, when amplifying an AC-coupled signal source like a transformer, each input point must have a DC path to ground. As shown in Figure 4-6.　　　　Figure 4. Bias Current Loop with Transformer Coupled Input　　Figure 5. Bias Current Loop for Thermocouple Input　　Figure 6. Bias Current Loop When AC Coupled Input(2) All instrument amplifiers rectify the signal outside the channel. If a small signal is amplified, this rectified voltage becomes a DC offset voltage. The structure of AD620 allows a first-level filter to be inserted between the base and emitter of the input transistor to filter out unwanted rectified signals, as shown in Figure 5. RC=1/2πf, f is greater than or equal to the bandwidth of AD620, C≤150pF.　　　　Figure 7. Primary Filter Principle Diagram(3) The output voltage of AD620 is related to the reference terminal. Connecting the REF terminal to an appropriate grounding point can solve many grounding problems.Many data acquisition systems separate the analog ground from the digital ground. How come? Just aiming to isolate the low-level analog signal from the noisy digital environment. The grounding principle is as follows: each independent ground loop minimizes the current flowing from the sensitive point to the ground. These ground loops must be connected together at some point, usually on the ADC.Let's take a look at Figure 7. The reference terminal 5 of the AD620, the ground terminal of the sample-and-hold AD585. And the ground terminal of the analog power supply are respectively connected to the analog ground terminal of the analog-to-digital converter AD574A. The ground terminal of the digital power supply is connected with the digital ground of the analog-to-digital converter AD574A. Finally, the analog ground and digital ground are connected to the AD574A.In many applications, shielded cables are often used to reduce noise interference at the input. Proper drive to the shield can reduce the differential phase shift caused by cable capacitance and stray capacitance. And ensure that the AC common-mode rejection ratio does not drop.Figure 8 shows the differential shield drive connection.Figure 9 shows the common-mode shield drive connection.　　Figure 8. Differential Shield Drive　　Figure 9. Common Mode Shield DriveV AD620 Application5.1 Application in Photoelectric DetectionPhotoelectric detection is widely used in the industry. The principle of designing a photoelectric detection system is to reduce the total system noise to a minimum. The noise of the system mainly includes detector noise, resistance noise, and operational amplifier noise. Because they are independent of each other, the total noise can be expressed as　　Un(T)=[Un2(D)+Un2(L,F)+Un2(A)]1/2In the formula:Un2(D)———Detector noise varies with different photodetectors. The appropriate detector should be selected according to the system requirements;Un2(L,F)———Load resistance noise;Un2(A)———Op amp noise.The noise of AD620 is very small. Therefore, it is often used as the pre-op amplifier of the photoelectric detection circuit. Take the photodiode as the detector as an example to illustrate. Here, suppose the current of the photodiode is ID, then　　ID=ISC+IdarkIn the formula:ISC———Photocurrent. It is proportional to the light intensity, which is the effective information detected;Idark———Dark current. It consists of the current on the surface of the diode and the usual PN junction current. It belongs to invalid information in the system.We need to eliminate the influence of dark current. Two diodes D1 and D2 with the same performance and two resistors R1 and R2 with the resistance value of R are selected to form a bridge. As shown in Figure 10.　　　Figure 10. Photoelectric Detection Preamplifier CircuitWhen D1 has light and D2 has no light, the input voltage at both ends of the op-amp is (ISC+Idark)-R1-Idark-R=ISC-R1. It is only related to the photocurrent, thus eliminating the influence of the dark current.5.2 Application in Ultrasonic TestingIn the field of ultrasonic testing, especially when ultrasonic waves propagate in a non-uniform and attenuated medium, the echo after encountering the interface is very weak.If a general op-amp is used for pre-processing, the noise is often large and effective signals cannot be obtained. Choosing AD620 as the pre-amplifier circuit has a simple connection and low noise. As shown in Figure 11.　　　Figure 11. Ultrasonic Detection Receiving Front CircuitVI ConclusionAD620 is a high precision instrumentation amplifier. In the application, we also need to pay attention to prevent the blockage of the amplifier. If a strong DC signal is superimposed on the weak signal, we must set up a separation circuit. In this way, the DC signal can be separated.FAQWhat is AD620?AD620 is a low-cost, high-precision instrumentation amplifier. It only requires an external resistor to set the gain. The gain range is 1 to 10,000.Can I change AD620 to AD623 when making MCU products?Both AD620 and AD623 are single instrumentation amplifiers, and the pin arrangement is exactly the same.The main difference is: AD620 must use positive and negative power supplies, AD623 can be a positive and negative power supply or a single power supply.If the original board is AD620, you can replace it with 623; if the original board is AD623, you may not be able to replace it with 620 (it depends on whether the power supply of the original board circuit is dual power supply or single power supply).After replacing AD620 and AD623 in single-chip products, the program can work normally without modification.What is the difference between AD620BR and AD620AN?Their packages are different.What is the output resistance of AD620? How to adjust it?AD620 is a kind of low power consumption instrument amplifier, its output resistance is about 10K, this is the inherent characteristic of this chip, generally it is difficult to adjust.If you have requirements for output resistance, you can generally use an external circuit to solve it.Is AD620 a positive phase amplification or a reverse phase amplification?AD620 is an instrument amplifier, the output voltage is [(Vin+)-(Vin-)]*gain.If the desired signal is (Vin+)-(Vin-), the gain is positive, which is equivalent to positive amplification.Conversely, if the desired signal is (Vin-)-(Vin+), the gain is equivalent to negative, which is equivalent to reverse amplification.What is an instrumentation amplifier?Instrumentation amplifier, an improvement of the differential amplifier, has an input buffer, does not require input impedance matching, so that the amplifier is suitable for measurement and electronic instruments