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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If you change k in steps of 2. It is available as a pin DIP from everyone. The zener diode I refer to is datasheett the function block diagram of the datasheet and refers to zener voltage Vz out of pin 9. This terminal is directly supplied from the supply when not connected to series pass transistor.

LMH datasheet, Pinout ,application circuits Voltage Regulator

However, I don’t understand: With the voltage turned right down of course. I don’t see a “zener diode” in the schematic. However, I don’t understand:. I’m trying to troubleshoot a delinquent power supply I have.

If you wanted current limit the arrangement used was simple obvious and standard fare. datasneet

IF you want to abandon this cct but keep it working If you can tolerate 1. Sign up using Facebook. Lm723hh the zener is not grounded it won’t work properly.

Voltage Regulator

Privacy policy About OpenCircuits Disclaimers. You mention 2N in comments but not on diagram or in question. But if your power supply is very old, and you have replaced the IC.


See data sheet for dissipation ratings which dattasheet max Vdrop x Iout you can use. To get more output voltage you need to use “booster” transistors. Oh man, can’t wait to read this. The old one had 2 of the pins open while which were being used for voltage feedback sensing.

I haven’t finished the functional description above but the added material should give you a very good insight into operation.

I suspect you’ll find a collector-base short on Q4. This is the conventional schematic symbol for a voltmeter. Q2 is a current datashest. Retrieved from ” http: By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

All the zener does in the diagram there is provide a stable voltage between pins 9 and 10, correct? Email Required, but never shown.

Power supply with LM – Electrical Engineering Stack Exchange

Indeed I’ve been looking through several datwsheet, the latest ones from TI being the most robust got them from Jameco. MJXS 71 1 3 Be sure Vin does not exceed 35V!. A was used to regulate the HV output 15KV. I tested it with a 5-ohm power resistor.

Q2 is for short-circuit protection- it detects the voltage across R As Q1 is a TO92 package with dissipation well under 1 Watt this is probably why it exploded – summat went aglae, the tried to turn on to cause Vout to rise by turning on Q1 to turn on Q3, the cct did not comply so it kept turning Q1 on and it gave up dur to the ‘s base current.


Secondly, apologies to those who feel this question wasn’t researched enough nor novel. I am familiar with the but don’t think I’ve ever actually used one so now I’m going to look into them as well lm7723h an interim PS would be nice With 35V in you can get about 1.

These terms seem generic and innocent enough, but have a special meaning within the context of voltage regulators.

National Semiconductor

Q1 is driven on by the ”s output transistor and in turn it drives Q3. Several companies manufacture the LM, but the data sheets are pretty much the same. Pin 6 provides a buffered reference voltage – the forerunner of a modern bandgap reference. Russell McMahon k 9 Power supply with LM Ask Question.

What’s the purpose of this? Vpot can be shown to vary from 7. Views Read View source View history.