LM723H DATASHEET PDF

LMH/ Texas Instruments Linear Voltage Regulators LMH/ Voltage Regulator datasheet, inventory, & pricing. The LM/LMC is a voltage regulator designed prima- rily for series regulator applications. By itself, it will supply output currents up to mA; but external. The LM is a monolithic integrated programmable voltage regulator, assembled in. lead dual in-line plastic package. The circuit provides internal current.

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This will be compared to a sample of the Vout voltage.

The Model T of the power transistor world. Q2 is a current limiter. But this IC is specially designed for series regulator application.

IF you want to abandon this cct but keep it working If you can tolerate 1. For 2A current limit R10 is about 0. Go above this and kaput! The output transistor 10,11 drives the external pass element.

Russell McMahon k 9 Is Q2 providing feedback?

Are lm273h unity voltage gain? The latter being a very curious designation. Thank you very much for your reply, this explains a lot in only a few lines. LM is an adjustable voltage regulator IC used for shunt regulator, current regulator, and temperature controller. Is Q1 an amplifying stage?

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Voltage Regulator

TL — Programmable Reference Voltage. The zener diode I refer to is in the function block diagram of the datasheet and refers to zener voltage Vz out of pin 9. If you wanted current limit the arrangement used was simple obvious and standard fare. Does it imply there are actually two transistors connected in parallel? It is available as a pin DIP from everyone. Most transistors “explode” in experimental situations because they are connected wrong.

Retrieved from ” http: This circuit is the first time I’ve seen it used in any schematic. By using our site, you acknowledge that you have read daasheet understand our Cookie PolicyPrivacy Policyand our Terms of Service.

However, I don’t understand: I actually managed to figure out the part about how it varies the voltage from by myself on the weekend, I was pretty happy with myself, I’m impressed you got the value like that though, right on the money haha.

For finding the value of output voltage for this circuit you can use the formula below:. If it is a 1 Watt it might last darasheet long time.

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National Semiconductor

Sign up or log in Sign up using Google. Post as a guest Name. Sign up using Email and Password. Votes to close are disappointing. The circuit is MUCH easier to understand if you draw it with the internals shown and arrange darasheet around the in logical fashion.

LM IC Pinout, Specifications, Equivalent & Datasheet

Q2 is for short-circuit protection- it detects the voltage across R Above formula gives this graph The circuit is MUCH easier to understand if you draw it with the internals shown and arrange it around the in logical fashion.

I checked theand it has ohms from emitter to base i. I am just reading through all the responses now. Indeed I’ve been looking through several datasheets, the latest ones from TI being the most robust got them from Jameco.

But if your power supply is very old, and you have replaced the IC. First, the LM has a maximum allowable input voltage of 40 volts.