LM396K DATASHEET PDF

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LMK Datasheet, PDF – Alldatasheet

PV charger battery circuit 4. The LM dqtasheet tolerate a wide range of input and output capacitance but long wire runs or small values of output capacitance can sometimes cause problems If an output capacitor is used it should be 1 mF or larger We suggest 10 m.

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Connected as shown Rw is not multiplied by the divider ratio Rw is about 0 X per foot using 16 gauge wire This translates to 40 mV ft at 10A load current so it is important to keep the positive lead between regulator and load as short as possible.

The LM is exceptionally easy to use Only two external resistors are used to to set output voltage On-chip adjust- ment of the reference voltage allows a much tighter specifi- cation of output voltage eliminating any need for trimming in most cases The regulator will tolerate an extremely wide range of reactive loads and does not depend on external capacitors datashheet frequency stabilization Heat sink require- ments are much less stringent because overload situations do not have to be accounted for.

Internal current and power limiting. Hierarchical block is unconnected 3.

DC regulated output voltage. Tel 1 Minimum load current of 10 mA is normally satisfied by the resistor divider which sets up output voltage. Although it may not be immediately obvious best load regu- lation is obtained when the top of the divider is connected. Thermal as well as electrical load regulation must be con- sidered with IC regulators Electrical load regulation occurs in microseconds thermal regulation due to die thermal gra- dients occurs in the 0 2 ms ms time catasheet and regula- tion due to datadheet temperature changes in the die occurs over a 20 ms to 20 minute period depending on the time constant of the dataaheet sink used Gradient induced load regu- lation is calculated from.

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The time now is Adjustment pin current change is datasheeet for the worst-case combination of input voltage output current and power dissipation Changes due to.

Direct paralleling of regulators is not normally recommend- ed because they do not share currents equally The regula- tor with the highest reference voltage will supply all the cur- rent to the load until it current limits With an 18A load for instance one regulator might be operating in current limit at 16A while the second device is only carrying 2A Power dis- sipation in the high current regulator daatsheet extremely high with attendant high junction temperatures Long term reliability cannot be guaranteed under these conditions.

Load regulation dattasheet the 2-pin package is determined primarily by the voltage drop along the output pin Specifications apply for an external Kelvin sense. Heat sinks, Part 2: F solid tantalum if significant improvements in high fre. Distorted Sine output from Transformer datqsheet.

Fax a49 85 R1 should be wirewound. Tel a49 78 This is a worst-case specification which includes all effects due to input voltage output current temperature and power dissipation Maximum power.

But in this case you have to have a minimum load always present until the power to the regulator is on. National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. C1 is necessary only if main filter capacitor is more than 6.

Output is short circuit protected. I have a feeling its the fault of the variable resistor perhaps lm39k resistance decreases as temp increases. R3 watts over the al.

Electrical line regulation is very good on the LM Fran ais Tel a49 93 Although power dissipation is internally limited electrical specifications apply only for power dissipation up to the limits shown Derating with temperature. Tel a49 16 Analog Layout Finger Size 4. Line regulation is measured on a short-pulse low-duty-cycle basis to maintain constant junction temperature Changes in output voltage due to thermal.

LM396 PDF Datasheet浏览和下载

How do you get an MCU design to market quickly? Input and Output Capacitors. Measuring air gap of a magnetic core for home-wound inductors and flyback transformer 7. Figure 5a will typically. The input resistance of the sense pin is typically 6 kX mod- eled as a resistor between the sense pin and the output pin Load regulation will start to datzsheet if a resistance higher than 10X is inserted in series with the sense This assumes a worst-case condition of 0 5V between output and sense pins Lower differential voltage will allow higher sense series resistance.

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Rectifier forward voltage drop at three times DC output current. Synthesized tuning, Part 2: Dropout voltage is input-output voltage differential measured at a forced reference voltage l,396k 1 15V with a 10A load and is a measurement of the. Deutsch Tel a49 85 Minimum input-output voltage of regulator. You can use for higher output voltage but the difference between Vin-Vout should not exceed the specifications at the recommended Junction Temperature.

With no adjustment pin bypass For output vatasheet ages other than 5V multiply vertical scale by V. Further improvements in efficiency can be obtained by using Schottky diodes or high efficiency diodes with lower forward voltage combined with larger filter capacitors to reduce rip- ple However this reduces the voltage difference between input and drive pins and may not allow sufficient voltage to fully saturate the pass transistor Special transformers are available from Signal Transformer that have a 1V tap on the output winding to provide the extra voltage for the drive pin The transformers are available as standard items for 5V ap- plications at 5A 10A and 20A Other voltages are available on special request.

Total thermal resistance junction-to-ambient will include junction-to-case thermal resistance plus interface resistance and heat sink resistance See. R3 is selected to supply partial load current Therefore a minimum load.

A few words of caution 1 R3 power rating must be increased to V. Lead Temperature Soldering 10 seconds. Because the LM is a three-terminal device it is not pos- sible to provide true remote load sensing Load regulation will be limited by the resistance of the output pin and the wire connecting the regulator to the load For the data sheet specification regulation is measured 1 4.

The LM is a 10 amp regulator adjustable from 1 25V to 15V which uses a revolutionary new IC fabrication structure to combine high power discrete transistor technology with modern monolithic linear IC processing This combination yields a high-performance single-chip regulator capable of supplying in excess of 10 amps and operating at power lev- els up to 70 watts The regulators feature on-chip trimming of reference voltage to.

R3 watts Regulator power dissipa. Input port and input output port declaration in top module 2.