The Kynix Components

MB10F is a Surface Mount Glass Passivated Bridge Rectifier 0.5A 1000V 4-SOIC.CatalogProduct OverviewMB10F CAD ModelsMB10F Package DimensionsMB10F Suggested Pad LayoutMB10F FeaturesMB10F Product AttributesMB10F ApplicationsMB10F Purchasing RiskUsing WarningsComponent DatasheetMCP602 ManufacturerProduct OverviewAs an ultra-thin SMD bridge rectifier, MB10F converts alternating current into direct current, based on the single-phase conductivity of the diode. Designed for smaller devices, and low energy-consuming application circuits, which is an ideal choice for the design of trendy electronic products. The soldering pins are the same as those of the MB6S, which can be directly replaced without changing the PCB board. So it is of great help to the development of the production industry of miniaturized high-current products, and is very suitable for portable applications that save circuit board space design.The Passivated Bridge Rectifier is ideal for automated placement and features reliable low-cost construction using a precise plastic moulding technique. In power supplies, bridge rectifiers are used to provide necessary DC voltages for electronic components or devices.MB10F CAD ModelsMB10F CAD ModelsMB10F Package DimensionsPackage DimensionsMB10F Suggested Pad LayoutMB10F Suggested Pad LayoutMB10F Features• Plastic material has U/L flammability classification 94V-O• High surge overload rating : 35A peak• Saves space on printed circuit boards• High temperature soldering guaranteed : 260° C/10sec/ at 5 lbs. (2.3kg) tension• Terminals: Plated leads solderable per MIL-STD-750, Method 2026• Case: Molded plastic body over passivated junctions• Polarity: Polarity symbols marked on body Dimensions in inches and (millimeters)• Mounting Position : Any• Weight : 0.0078 ounce, 0.22 gram• Package : MBS• Case Material: Molded Plastic. UL Flammability Classification Rating 94V-0• Moisture Sensitivity: Level 1 per J-STD-020• Terminals: Lead Free Plating (Matte Tin Finish). Solderable per MIL-STD-202, Method 208• Polarity: As Marked on Body• Weight: 0.08 grams (Approximate)MB10F Product AttributesSpecificationsValuesManufacturer:Diodes IncorporatedProduct Category:Bridge RectifiersRoHS:DetailsType:Single Phase BridgeMounting Style:SMD/SMTPackage/Case:MBF-4Package Body Material:Plastic/EpoxyPackage Style:Small OutlineIf - Forward Current:800 mAPeak Reverse Voltage:1000 VVf - Forward Voltage:0.94 VMax Surge Current:30 AMinimum Operating Temperature:- 55 CMaximum Operating Temperature:+ 150 CNumber of Elements:4Number of Phases1Length:4.95 mmWidth:4.1 mmHeight:1.6 mmSeries:MB10Packaging:ReelPackaging:Cut TapePackaging:MouseReelBrand:Diodes IncorporatedIr - Reverse Current:0.2 uAProduct Type:Bridge RectifiersFactory Pack Quantity:5000Subcategory:Diodes & RectifiersVr - Reverse Voltage:1000 VDiode Element Material:SiliconTerminal Form:Gull WingTerminal Position:DualMB10F ApplicationsMB10F is suitable for AC to DC bridge full wave rectification for SMPS, LED lighting, adapter, battery charger, home appliances, office equipment, and telecommunication applications.MB10F Purchasing RiskMB10F Purchasing RiskUsing WarningsPlease check their parameters and pin configuration before replacing them in your circuit.Component DatasheetMB10F PDFMCP602 ManufacturerDiodes Incorporated is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic, analog, and mixed-signal semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets.FAQWhat is MB10F?MB10f is a surface Mount Glass passivated bridge rectifier with Maximum Peak reverse voltage of 1000 volts & average output current of 0.8 Ampere. What is an ideal choice for the design of trendy electronic products?Low energy-consuming application circuits What type of products is MB10F of great help to the development of?Miniaturized high-current products What is the use of MB10F?Suitable for AC to DC bridge full wave rectification for SMPS, LED lighting, adapter, battery charger, home appliances, office equipment, and telecommunication applications.

This post contains details about IRF740 and  IRF640 pinout, equivalent, uses, features and other important information about how and where to use this MOSFET device. CatalogMOSFET Explained / DescriptionCAD ModelPinout : IRFf640 vs IRF740Replacement and EquivalentFeatures / Technical Specifications : IRF640 vs IRF740Applications : IRF640 vs IRF740Where We Can Use it & How to Use: IRF640 vs IRF740How to Safely Long Run in a Circuit: IRF640 vs IRF740Circuits: IRF640 vs IRF740Product Attributes : IRF740 vs IRF 640 Product DatasheetFAQ  MOSFET Explained / DescriptionIRF740 is a high voltage N channel MOSFET, the transistor is basically designed for high voltage and high speed switching applications. The max load voltage this transistor can drive is up to 400V with a maximum load current of 10A. The maximum current in pulse mode is 40A and the on-resistance or (RDS) is 0.55 ohms.The max drain to source voltage of 400V makes it ideal to drive a variety of high voltage loads in electronic circuits. IRF640 is an N Channel MOSFET designed for high speed switching purposes. This high speed switching capability can be very useful in applications where switching speed is crucial, for example in a UPS circuit or in any other application where a user wants to change the load input power from one source to another.The transistor is capable of driving a load of up to 18A and the voltage can be upto 200V with the minimum saturation voltage of only 2V to 4v at its gate. The pulsed drain current is 72A means this MOSFET can drive a load of upto 72A in short intervals or when the load is not continuously connected and only connected for a 300us (Microseconds) time period with the duty cycle of 1.5%.How To Test a MOSFET Transistor Using a Multimeter CAD Model  Symbol   Footprint  2D Model Pinout : IRFf640 vs IRF740 no difference in  pinout  Replacement and Equivalent IRF740  :   2SK1400A, BUK457-400B, BUZ61A, IRF740S, MTP10N40E, RFP7N35, RFP7NA40 IRF640 :  YTA640, IRF641, IRF642, IRFB4620, IRFB5620, 2SK740, STP19NB20, YTA640, BUK455-200A, BUK456-200A, BUK456-200B, BUZ30A, MTP20N20E, RFP15N15, 2SK891, 18N25, 18N40, 22N20  Features / Technical Specifications : IRF640 vs IRF740IRF640IRF740Package Type: TO-220Package Type: TO-220 And Other PackagesTransistor Type: N ChannelTransistor Type: N ChannelMax Voltage Applied From Drain to Source: 400VMax Voltage Applied From Drain to Source: 200VMax Gate to Source Voltage Should Be: ±20VMax Gate to Source Voltage Should Be: ±20VMax Continues Drain Current is : 10AMax Continues Drain Current is : 18AMax Pulsed Drain Current is: 40AMax Pulsed Drain Current is: 72AMax Power Dissipation is: 125WMax Power Dissipation is: 125WMinimum Voltage Required to Conduct: 2V to 4VMinimum Voltage Required to Conduct: 2V to 4VMax Storage & Operating temperature Should Be: -55 to +150 CentigradeMax Storage & Operating temperature Should Be: -55 to +150 Centigrade Applications : IRF640 vs IRF740IRF740IRF640Applications that requires fast switchingBattery Chargers and BMSHigh voltage applicationsSolar Power Supply ApplicationsMotor DriversApplications That Requires Fast SwitchingDC Motor drivers and controllers applicationsMotor DriversUPSupsBattery charger circuits Lighting and ballast circuits  Where We Can Use it & How to Use: IRF640 vs IRF740IRF640 can be used in circuits where switching speed important for example in battery backup systems, uninterruptable power supplies, etc. and it will also perform well in general-purpose switching applications. Other than that it can also be used in building blocks of audio amplifiers.  IRF740 can be used in circuits in which you want to drive a voltage load of upto 400V with 10A load current. Also, the high speed switching capability makes it suitable in applications where the user requires switching from one source to another in nanoseconds.The 400V load capability makes it suitable to use in a variety of high voltage applications such as uninterrupted power supplies, LED and other light ballasts, etc.Moreover, this transistor can also be used in audio amplifier circuit stages and also as a separate audio amplifier. How to Safely Long Run in a Circuit: IRF640 vs IRF740 IRF640For long term performance, we always suggest using all components at least 20% below its maximum ratings and the same goes with IRF640. The max drain current is 18A therefore do not drive a load of more than 14.4A. The maximum load voltage is 200V and to stay under the safe side do not drive load of more than 160V. The maximum pulsed drain current is 72A so the max pulsed load should not exceed 57.6A. Use a proper heat sink with the transistor and always store or operate the device at temperature above -55 degree centigrade and below +150 degree centigrade. IRF740For long life performance of a component it’s important to not use a component on its maximum ratings and always use it at least 20% below from its max ratings, therefore same goes with IRF740 MOSFET.  The maximum continuous drain current is 10A therefore do not drive a load of more than 8A. The max drain to source voltage is 400V thus do not drive load of more than 320V. Where ever in operation use a suitable heatsink with the transistor and always store and operate this transistor in temperature above -55 degree Celsius and below +150 Celsius. Circuits: IRF640 vs IRF740 power mosfet IRF740 as a switch circuit ( switch 300 volts DC and 5amp) Product Attributes : IRF740 vs IRF 640TYPEDESCRIPTION IRF740DESCRIPTION IFR640CategoryDiscrete Semiconductor ProductsDiscrete Semiconductor Products Transistors - FETs, MOSFETs - SingleTransistors - FETs, MOSFETs - SingleMfrSTMicroelectronicsSTMicroelectronicsSeriesPowerMESH™ IIMESH OVERLAY™PackageTubeTubePart StatusObsoleteObsoleteFET TypeN-ChannelN-ChannelTechnologyMOSFET (Metal Oxide)MOSFET (Metal Oxide)Drain to Source Voltage (Vdss)400 V200 VCurrent - Continuous Drain (Id) @ 25°C10A (Tc)18A (Tc)Drive Voltage (Max Rds On, Min Rds On)10V10VRds On (Max) @ Id, Vgs550mOhm @ 5.3A, 10V180mOhm @ 9A, 10VVgs(th) (Max) @ Id4V @ 250µA4V @ 250µAGate Charge (Qg) (Max) @ Vgs43 nC @ 10 V72 nC @ 10 VVgs (Max)±20V±20VInput Capacitance (Ciss) (Max) @ Vds1400 pF @ 25 V1560 pF @ 25 VFET Feature--Power Dissipation (Max)125W (Tc)125W (Tc)Operating Temperature-65°C ~ 150°C (TJ)150°C (TJ)Mounting TypeThrough HoleThrough HoleSupplier Device PackageTO-220TO-220Package / CaseTO-220-3TO-220-3Base Product NumberIRF740IRF640  Product Datasheet IRF740 DatasheetIRF640 Datasheet  FAQWhat is IRF740?The IRF740 is an N-Channel Power MOSFET which can switch loads upto 400V. The Mosfet could switch loads that consume upto 10A, it can turned on by provide a gate threshold voltage of 10V across the Gate and Source pin. ... Hence this mosfet cannot be used in applications where high switching efficiency is required. What is IRF640?IRF640 is an N Channel MOSFET designed for high speed switching purposes. This high speed switching capability can be very useful in application where switching speed is crucial, for example in a UPS circuit or in any other application where use wants to change the load input power from one source to another. What are MOSFET transistors used for?The purpose of a MOSFET transistor is essentially to control voltage/current flow between the source and the drain.2 What are power MOSFETs used for?Power MOSFETs (Metal-Oxide Semiconductor Field Effect Transistors) are three-terminal silicon devices that function by applying a signal to the gate that controls current conduction between source and drain. What is an N-channel Mosfet?N-Channel MOSFET is a type of metal oxide semiconductor field-effect transistor that is categorized under the field-effect transistors (FET). ... This type of transistor is also known as an insulated-gate field-effect transistor (IGFET). Sometimes it is also known as a metal-insulator field-effect transistor (MIFET). What is the maximum load voltage of the IRF740 transistor? 400V What type of MOSFET is IRF640? N Channel MOSFET What type of applications does IRF640 perform well in? General-purpose switching applications What can IRF640 be used as a separate audio amplifier? Audio amplifier circuit stages What percentage of IRF640 components are below its maximum ratings? 20%

 74LS245 is used to drive LEDs or other devices. It is an 8-way in-phase three-state bidirectional bus transceiver that can transmit data in both directions. 74LS245 also has a two-way three-state function, which can output or input data.Catalog74LS245 Description74LS245 Pinout74LS245 Pin ConfigurationProduct details74LS245 Features & SpecificationsWorking principleApplications74LS244 Octal Tri-state Buffer vs 74LS245 Bus Transceiver74LS245 DatasheetUsing Warnings74LS245 DescriptionThese octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements. The SNx4LS245 devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can disable the device so that the buses are effectively isolated.  74LS245 Pinout74LS245 Pinout  74LS245 Pin ConfigurationPin NoPin NameDescription1DIRDirectional Control Input Pin2A1Data Bus Input Pin A13A2Data Bus Input Pin A24A3Data Bus Input Pin A35A4Data Bus Input Pin A46A5Data Bus Input Pin A57A6Data Bus Input Pin A68A7Data Bus Input Pin A79A8Data Bus Input Pin A810GNDGround Pin11B8Data Bus Input Pin B812B7Data Bus Input Pin B713B6Data Bus Input Pin B614B5Data Bus Input Pin B515B4Data Bus Input Pin B416B3Data Bus Input Pin B317B2Data Bus Input Pin B218B1Data Bus Input Pin B119E’Active low Enable pin20VccChip Supply Voltage Product detailsPackage | Pins | SizeTechnology FamilyLSIOL (Max) (mA)24IOH (Max) (mA) 15Operating temperature range (C)0 to 70RatingCatalogApprox. price (USD)1ku | 0.287ParametersPDIP (N)20229 mm² 24.33 x 9.4SOIC (DW)20132 mm² 12.8 x 10.3SOP (NS)2098 mm² 12.6 x 7.8SSOP (DB)2038 mm² 5.3 x 7.2 74LS245 Features & SpecificationsTechnology Family: LSVCC (Min): 4.75VVCC (Max): 5.25VBits (#): 8Voltage at nominal operation: 5VFrequency at normal voltage (Max): 35MHzICC at normal voltage (Max): 0.09mAPropagation delay (Max): 8ns – 12ns3-State Outputs to Drive Bus Lines DirectlyPNP Inputs Reduce DC Loading on Bus LinesHysteresis at Bus Inputs Improves Noise MarginsIOL (Max): 24mAIOH (Max): -15mA Rating: CatalogOperating temperature range: 0°C to 70°C Working principleIf the P0 port of C51 is used to output to the digital tube, the brightness of the digital tube and the load capacity of the P0 port must be considered. When the P0 port bus load of the 8051 single-chip microcomputer reaches or exceeds the maximum load capacity of P0, 74LS245 must be connected. Bus driver. Choose 74LS245 to improve driving ability. After the output of P0 port When the chip select terminal/CE low level is active , DIR = "0", the signal is transmitted from B to A; (receive), DIR = "1", the signal is transmitted from A to B; (send). When CE is high level, A and B are both high impedance state . Working principleApplicationsBuilding AutomationElectronic Point of SaleFactory Automation and ControlTest and Measurement protocolsApplication examples Application examples Bus drivers 74LS244 and 74LS245 are often used as three-state data buffers , 74LS244 is a unidirectional three-state data buffer , and 74LS245 is a two-way three-state data buffer. The comparison of the two circuit diagrams is shown in the figure below. There are 8 three-state drivers in the unidirectional, divided into two groups, and there are 16 tri-state drivers in the bidirectional, 8 in each direction. As shown in Figure "74LS244 and 74LS245". 74LS244 Octal Tri-state Buffer vs 74LS245 Bus TransceiverThe “Tri-state Buffer”A Tri-state Buffer is another type of buffer circuit which can be used to control the passage of a logic signal from its input to its output. The tri-state buffer is a combinational device whose output can be electronically turned “ON” or “OFF” by means of an external “Control” or “Enable” (EN) signal input allowing them to be used in bus-orientated systems. 74LS244 Octal Tri-state Buffer 74LS244 Octal Tri-state Buffer Notice that the eight buffers are configured into two groups of four with the first group (A1 to A4) being controlled by enable input, CA, and the second group (A5 to A8) being controlled by the enable input, CB. The 74LS244 has very high sink and source current capabilities if required to switch transistor loads. 74LS245 Bus Transceiver 74LS245 Bus Transceiver The TTL 74LS245 is an octal bus transceiver (Transmitter/Receiver) designed for asynchronous two-way communication between two data buses or input/output device. The transceiver allows for the transmission of data from the terminals A to terminals B or the reverse depending on the logic level at the direction-control (DIR) input, (pin 1). So for example, if the direction-control input is HIGH at logic level “1”, then data will pass from terminal set A to terminal set B. If the direction-control input is LOW at logic level “0”, then data will pass in the reverse direction from terminal set B to terminal set A. So when held HIGH at logic level “1”, the output chip-enable (CE) input, (pin 19) can be used to disable the device so that the terminals, and therefore any connected data buses are effectively isolated from each other in a Hi-Z state.74LS245 Datasheet74LS245 DatasheetUsing WarningsPlease check their parameters and pin configuration before replacing them in your circuit. 

The 1N5819 is a Schottky diode with a low forward voltage drop and high switching speed. It is commonly used in high frequency applications like Inverters, DC-DC converters etc.Catalog1N5819 Pin Configuration and Functions1N5819 Features1N5819 Mechanical Data1N5819 Package Outline1N5819 Applications1N5819 Functional Equivalents1N5819 Popularity by Region1N5819 Market Price Analysis1N5819 ManufacturerComponent DatasheetFAQOrdering & Quantity1N5819 Pin Configuration and FunctionsPin No.Pin NameDescription1AnodeCurrent always Enters through Anode2CathodeCurrent always Exits through Cathode1N5819 FeaturesGuard Ring Die Construction for Transient ProtectionLow Power Loss, High EfficiencyHigh Surge CapabilityHigh Current Capability and Low Forward Voltage DropFor Use in Low Voltage, High Frequency Inverters, Free Wheeling, and Polarity Protection Application1N5819 Mechanical DataCase: DO-41 ·Case Material: Molded Plastic. UL Flammability Classification Rating 94V-0 ·Moisture Sensitivity: Level 1 per J-STD-020 ·Terminals: Finish - Tin. Plated Leads Solderable per MIL-STD202, Method 208 ·Polarity: Cathode Band ·Marking: Type Number and Date Code1N5819 Package Outline1N5819 ApplicationsCan be used to prevent reverse polarity problemHigh Frequency InvertersUsed as a protection deviceCurrent flow regulatorsPolarity Protection applications1N5819 Functional Equivalents1N5819 Popularity by Region1N5819 Market Price Analysis1N5819 ManufacturerDiodes Incorporated delivers high-quality semiconductor products to the world’s leading companies in the consumer electronics, computing, communications, industrial, and automotive markets. They leverage their expanded product portfolio of discrete, analog, and mixed-signal products and leading-edge packaging technology to meet customers’ needs. Their broad range of application-specific solutions and solutions-focused sales, coupled with worldwide operations of 25 sites, including engineering, testing, manufacturing, and customer service, enables us to be a premier provider for high-volume, high-growth markets.Component Datasheet1N5819 DatasheetFAQWhat is 1N5819?The 1N5819 is a Schottky Diode with forward voltage drop of 600mV and a forward current of 1A. Since it has a very low forward voltage drop it can be used in reverse polarity protection circuits, unlike a normal diode which has more than 1V as forward voltage drop 1N5819 only has 600mV drop across it when 1A current is flowing through it.What is a Schottky diode?A Schottky Diode is a metal-semiconductor diode with a low forward voltage drop and a very fast switching speed. The Schottky Diode is another type of semiconductor diode but have the advantage that their forward voltage drop is substantially less than that of the conventional silicon pn-junction diode.What is a Schottky diode used for?Schottky diodes are used for their low turn-on voltage, fast recovery time and low-loss energy at higher frequencies. These characteristics make Schottky diodes capable of rectifying a current by facilitating a quick transition from conducting to blocking state.What is the difference between Schottky diode and silicon diode? What is the advantages of Schottky diode?Compared to normal diodes,  Schottky diode also has relatively faster switching speeds and hence can be used in high frequency switching circuits. The reverse blocking voltage for 1N5819 is about 28V only which is kind of a downside for all Schottky diodes so make sure this does not affect the performance in your circuit. 

I DescriptionWhat is LM2596? LM2596 is a switching voltage regulator for step-down power management monolithic integrated circuits, capable of outputting 3A drive current while having good linearity and load regulation characteristics. The fixed output versions of LM2596 are 3.3V, 5V and 12V, and the adjustable version can output various voltages less than 37V.With only a few external components, we can use this voltage regulator! Moreover, the LM2596 switching frequency is 150KHz, which means that compared with low-frequency switching regulators, we can use smaller specifications of filter components. In addition, LM2596 integrates frequency compensation and fixed frequency generator.This blog will introduce 4 typical application circuits of LM2596.Figure 1. LM2596CatalogI DescriptionII Circuit of LM2596 Output 3.3V, 5VIII Circuit of Step-Down Voltage RegulatorsIV LM2596 Application CircuitV LM2596 Adjustable Current Limiting RegulatorFAQOrdering & QuantityII Circuit of LM2596 Output 3.3V, 5VHave you noticed that in the design below, all LM2596 chips choose a supply voltage of 5V, 3.3V or 1.8V? This is because, in the design of the whole control system, if the power supply system is too complex and redundant, it will not only cause electromagnetic interference to other parts of the circuit, but also the economic benefit is not good. Therefore, the selection of 5 V, 3.3 V or 1.8 V supply voltage is beneficial to the experimental design.What are the other benefits ? In this way, the 24 V voltage can be directly converted into the desired voltage by using 3 LM2596 and some capacitors, inductors, diodes and so on. This kind of design circuit is not only simple and convenient, but also very economical. The power supply circuit is shown in Figure 2.When we use it, we can choose the chips of LM2596 + 5V, LM2596 + 3.3V and LM2596 + 1.8V according to our needs:To obtain the connection of graph (a) when + 1.8V and + 5V,To obtain the connection of graph (b) when + 3.3V.　　　　Figure 2. LM2596 Circuit DiagramIII Circuit of Step-Down Voltage RegulatorsWhen you think aoout the voltage regulator and step-down module in the single-chip microcomputer system, will you think of common chips such as LM7805 and AMS117? Since LM7805 and AMS117 are low in cost and can be used directly without external expansion of other components, they have been widely used.But don't forget that LM7805 has a fatal disadvantage: high heat generation and low output current. In the microcontroller system, if the external device current is very small, then it’s OK to choose LM7805. However, once we need to drive modules with larger currents such as relays, LM7805 appears to be powerless, because high heat generation means power loss. In addition, if the input voltage of LM7805 is about 15V, even if the current required for the output load is small, its heat generation is about 85 ℃ (I think this should be able to fry an egg), so a heat sink or a cooling fan must be added to it . This means that cost and PCB layout will be affected.The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version. However, it should be noted that because LM2596 is a switching voltage regulator, its own calorific value is very small. This means that the wide input voltage range compared with the LM7805, LM2596 needs to add several external components.　　　Figure 3. LM2596 Step-Down Voltage RegulatorsFrom the above figure, we can see that compared with LM7805, LM2596 has 4 more external components, and its output current can reach 3A at most, which is enough to deal with common single-chip microcomputer systems, at the same time, the input voltage range is wide and the maximum input voltage is 40V. LM2596 also has an adjustable version. If the adjustable version is used to make a 0-30v high-current adjustable power supply, it is completely feasible.Figure 4. Adjustable LM2596 The above figure is a circuit diagram of an adjustable version of LM2596, which can output a DC voltage of 0-37v, which is much better than LM317.IV LM2596 Application CircuitLM2596 supports adjustable output. When the input is 40V, the output can be continuously adjusted to 0～37V. The typical application circuit is as follows:　　 Figure 5. LM2596 Application CircuitNote: The feedback wire should be far away from the inductance, and the thick wire in the circuit must be short. Here we'd better shield it with a ground wire. The resistors R1 and R2 that regulate the output voltage should be close to the 4 pins of the LM2596.V LM2596 Adjustable Current Limiting RegulatorLM2596 does not have the function of current limiting, but in some electronic designs and auxiliary equipment, there is a certain demand for the function of current limiting. Although the standard application circuit given by the manufacturer cannot accomplish this function, we can add a function circuit to make it realize the current limiting function. As shown in Figure 6:　　　　Figure 6. LM2596 Adjustable Current Limiting RegulatorFAQWhat is lm2596?The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3-A load with excellent line and load regulation.What is the difference between LM2596 and LM2595?LM2596: The highest output current is 3A, 1PIN-VOUT, 2PIN-VIN;LM2595: The highest output current is 1A, 1PIN-VIN, 2PIN-VOUT.What is the voltage of each pin of LM2596-12? What is the function of each pin?Pin 1 is the input terminal, 12V, the normal working voltage range should be 14V~37V under the output condition; pin 2 is the output terminal, here is the high-frequency oscillation output, not DC voltage, so there is no definite voltage; pin 3 is grounded, 0V ; Pin 5 is the enable control terminal, LM2596 works normally when connected to a low level, and no output is turned off when connected to a high level, usually directly grounded; Pin 4 is the feedback control signal input terminal, connected to the middle connection point of the proportional resistor, where the voltage It is proportional to the actual output.Can LM2596 output negative voltage?LM2596 can output negative voltage.LM2596 has different application circuits, which can output positive voltage or negative voltage, but it has no boost function, and the absolute value of its output voltage must be less than the absolute value of the input voltage.In the circuit with adjustable output voltage of lm2596, can the output voltage be greater than the input voltage?The LM2596 switching voltage regulator is a step-down power management monolithic integrated circuit, which can output 3A drive current and has good linearity and load regulation characteristics. The output voltage will not be greater than the input voltage. If the output voltage is greater than the input voltage, it is best to use a step-up power chip. Such as XL6009, VT1050.What is the Switching Frequency of LM2596?150 kHzWhat is the Max Output Current of of LM2596? 3 AWhat is the Output Voltage Range of LM2596?1.23 to 37 VWhat is the length of LM2596?43.2 mm

I DescriptionThis blog uses LM386 integrated block as the core device to make a simple sound amplifier. Its production cost is relatively low. This blog is suitable for beginners to learn about power tubes, integrated operational amplifiers, speakers, language chips and other components. So we can master the principles, characteristics and usage of the basic amplifier circuit and power amplifier circuit.Figure 1. LM386CatalogI DescriptionII Introduction to LM3862.1 Features2.2 Internal StructureIII Working Principle of LM386 Sound AmplifierIV LM386 Sound Amplifier DebuggingV ConclusionFAQOrdering & QuantityII Introduction to LM3862.1 FeaturesLM386 is a kind of audio integrated amplifier. It has the advantages of low power consumption, adjustable internal chain gain adjustment, large power supply voltage range, few external components and low total harmonic distortion. Therefore, LM386 is widely used in recorders and radios, mainly in low-voltage consumer products. LM386 features are： Battery Operation Minimum External Parts Wide Supply Voltage Range: 4 V–12 V or 5 V–18 V Low Quiescent Current Drain: 4 mA Voltage Gains from 20 to 200 Ground-Referenced Input Self-Centering Output Quiescent Voltage Low Distortion: 0.2% (AV = 20, VS = 6 V, RL = 8 Ω, PO = 125 mW, f = 1 kHz) Available in 8-Pin MSOP PackageBased on the characteristics shown above, lm386 components are widely used in communication equipment, small radios, and walkie-talkie circuits. It is also called "universal power amplifier circuit" by the majority of electronic enthusiasts.2.2 Internal Structure　LM386 adopts 8-pin dual in-line package. See Figure 2 for the pin arrangement diagram.Figure 2. LM386 Pin Arrangement Pin 6 is connected to the positive pole of the power supply; Pin 4 are grounded; Pin 2 inverting input terminal; Pin 3 non-inverting input terminal; Pin 5 is the output terminal; Pins 1, 7, and 8 are used to improve the performance of the circuit. The external component ends, and the internal circuit is a three-stage amplifier circuit:The 1st stage consists of VT1~VT6 to form a differential amplifier circuit,The 2nd stage is composed of VT7 voltage amplifier circuit,The 3rd stage is composed of VT8~VT10 to form a complementary symmetrical OTL output circuit that can eliminate crossover distortion.R5, R6, and R7 form a negative feedback network.III Working Principle of LM386 Sound AmplifierThe core of the LM386 sound amplifier is the LM386 power amplifier integrated circuit. As shown in Figure 3.The electret microphone B1 converts sound signals into electrical signals. This signal is very weak, how to amplify it? We can add the coupling capacitor C1 to the base of VT1, and VT1 forms a common emitter amplifier circuit to amplify the signal. Also, the signal is output from the collector of VT1, and added to the inverting input terminal of LM386 via coupling capacitor C2 to pin 2 and pin 3 is grounded. After the signal is amplified by the internal three stages of LM386, the signal is output from pin 5, and then passes through the coupling capacitor. C3 is sent to the speakers. After going through these processes, it can make a sound.　　Figure 3. LM386 Sound AmplifierFigure 4. LM386 Audio Amplifier CircuitThen how to adjust the signal magnification of LM386? Here, we can connect an adjustable resistor R5 and capacitor C6 to pin 1 and pin 8 to form a series RC network. When R5=0, the voltage magnification is 200.Pin 7 is connected to capacitor C5 to prevent LM386 from generating self-excitation. In addition, pin 5 is grounded through R4 and C4 to make the speaker sound softer.IV LM386 Sound Amplifier DebuggingAfter the circuit is assembled, we should carefully check for errors or false soldering. If there is no abnormality after the inspection, turn on the 6V power supply for debugging:Step 1: Don't pick up the microphone first. When there is no input signal, test the quiescent current of the whole machine, which is about 7mA.Step 2: Test the static voltage value of each pin of LM386, as shown in Figure 2.Step 3: After the voltage and current are normal, place the RP volume regulator in the middle and touch the base of VT1 with a screwdriver. The speaker will emit a "click————click——" sound, indicating that the circuit is normal.Step 4: Connect the microphone B1, and then fine-tune the RP. If nothing goes wrong, speak into the microphone, the speaker should have amplified sound. If there is no sound, check whether the microphone cable is connected incorrectly or the quality of the microphone is defective.Step 5: When using a sound amplifier, do not place the microphone and speaker too close together. If they are unfortunately too close, the speakers will make a harsh sound. Therefore, it is best to use shielded wire for the microphone lead-out.Figure 5. LM386V ConclusionThrough the design of this blog, we have an essential understanding of the working principle of LM386. We have mastered the pin function, internal structure circuit and working principle of LM386. In addition, the sound amplifier made by LM386 has the characteristics of simple circuit, convenient debugging, and complete functions. After reading this blog, have you better understand LM386?FAQHow does an LM386 work?The Lm386 integrated chip is a low power audio frequency amplifier, which uses low level power supply like batteries in electronic circuits. It is designed as 8 pin mini DIP package. This provides voltage amplification of 20. By using external parts voltage gain can be raised up to 200.Is lm386 an op amp?The LM386 is a type of operational amplifier (Op-Amp). ... In an amplifier circuit, the LM386 takes an audio input signal and increases its potential anywhere from 20 to 200 times. That amplification is what's known as the voltage gain.What is lm386 IC?The LM386 is an integrated circuit containing a low voltage audio power amplifier. It is suitable for battery-powered devices such as radios, guitar amplifiers, and hobby electronics projects.How do you calculate lm386 gain?Voltage Gain Analysis:Without any external components, it has a gain of Gv = 2x15K/(150+1350) = 20 (26 dB).With a capacitor (or shortcutting) between pins 1 and 8 , it has a gain of Gv = 2x15K/150 =200 (46dB).Which IC is used in audio amplifier?The IC LM386 is a low-power audio amplifier, and it utilizes low power supply like batteries in electrical and electronic circuits. This IC is available in the package of mini 8-pin DIP.What are some projects that use the LM386 audio amplifier circuit?LM 386 is an integrated class AB amp and is good for beginners small audio amplifier applications…for example in a RF receiver,small Stereo system,cheap low voltage amplifier etc…drawbacks is that it cannot handle much power and hence creates distortion when you crank up the volume too much.. So other ICs are used in practical.How to make an LM386 audio amplifier circuit?