LM431 DATASHEET PDF

The LM is a 3-terminal adjustable shunt regulator with guaranteed temperature stability over the entire tempera- ture range of operation The output voltage. LM Adjustable Precision Zener Shunt Regulator An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in. View LM Datasheet datasheet from Texas Instruments at Digikey.

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When the transistor turns ON the device draws current and because of this current drawing a voltage drop appears across R1 resistor which is in series with voltage source V1. Electrical specifications do not apply when operating the device. Deviation datasheef Reference Input Current over.

Due to the sharp turn-on characteristics this device is an excellent replacement for many zener diode applications. C, the SO-8 at 6. The areas under the curves represent conditions that may cause the device to oscillate. LM is a regulator IC daatasheet with adjustable output voltage. To ensure that the geometry of the micro SMD package.

The output voltage may be set at any level greater than 2. Wave Soldering 10 om431. Here reference voltage Vref is the voltage at the non-inverting terminal of the op-amp eatasheet this voltage determines whether the op-amp outputs positive voltage or not.

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Ratio of the Change in Reference Voltage. Life support devices or systems are devices or. Whenever the output crosses threshold threshold is value determined by R2 and R3 value the op-amp get feedback via Vref and it drives the transistor ON. AN for more detailed information regarding board.

Internal Power Dissipation Notes 3, 4. Pin Configuration LM has three pins and function of each pin is mentioned below.

C, slope is positive. Infrared or Convection 20 sec. Single Supply Comparator with.

National Semiconductor

Also the current draw by op-amp and resistor network is neglected for easy explanation. It is now available in a chip sized pack. Minimum Cathode Current for Regulation. LM can be configured in many application circuits and a few are stated in the datasheet.

Dynamic Impedance vs Frequency. When the device is programmed with two external resistors, R1 and R2, see Figure 2the dynamic output impedance of the overall circuit, r Zis defined as: Dynamic Output Impedance Note 6.

Must be electrically isolated from the. The LM is a 3-terminal adjustable shunt datasheef with. Absolute Maximum Ratings Note 2. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.

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National Semiconductor – datasheet pdf

The output voltage may be set at any level. Deviation of reference input voltage, V DEVis defined as the maximum variation datzsheet the reference input voltage over the full temperature range.

So in the final result Vo will always be adjusted to float near the measured value by op-amp setup or LM Adjustable Precision Zener Shunt Regulator. Here Ic is the current drawn by the transistor. Submitted by admin on 18 November C, the SOT at 2.

Deviation of Reference Input Voltage Over. Test Circuit for Curve A Above.

l4m31 Symbol and Functional Diagrams. It popular application include. It is a 3-terminal shunt regulator with guaranteed temperature stability over the entire temperature range of operation. A critical component is any component of a life. Distributors for availability and specifications. Also Vref is the voltage at the midpoint voltage divider network formed by the two resistors R2 and R3.