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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Vref appears on pin 6. I tested it with a 5-ohm power resistor. Most transistors “explode” in experimental situations because they are connected wrong. The latter being a very curious designation. Llm723h the purpose of this? You can parallel LM’s – ideally add a small output resistor between Vout and feedback resistor network to achieve current sharing.

I actually managed datxsheet 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. Thanks again for your time.

Voltage Regulator

When the load voltage across R10 exceeds about 0. In a metal can: The 2N was the logical choice of pass transistor, and as it was NPN you needed Q1 to invert the drive polarity and give current gain.

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I can’t seem to replicate this behaviour so I suspect the interaction with the transistors is super important. If you lm72h3 to go to zero Vout you needed some cunning due to the non zero reference voltage so the upside down pot polarity system was used. If the zener is not grounded it won’t work properly.

Above formula gives this graph.

I’m not overly familiar with such things but I suspect it was probably standard practice in that day. Sign up using Facebook. But this IC is specially designed for series regulator application. However, I don’t understand: It’s the terminology that often confuses beginners. I think that my pinout is correct used http: 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 as an interim PS would be nice I checked theand it has ohms from emitter to base i.

It can able to provide a higher range of output voltage and current up to 10A by simply adding a series pass transistor with it, with having a wider range of operating temperature so the IC able to withstand for long. However, it will only regulate a maximum output current of about milliamps. IF you want to abandon this cct but keep it working If you can tolerate 1. These terms seem generic and innocent enough, but have a special meaning within the context of voltage regulators. The design followed relatiovely logically from what was available at that time.

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Power supply with LM – Electrical Engineering Stack Exchange

If you are only trying to build a volt 2 amp power supply, there are better ways to do it in Home Questions Tags Users Unanswered. But again, all with certain limitations.

Sorry I can’t remember which pins. Is Q1 an amplifying stage? On the functional block diagram of thepin 9 is the output directly below a zener diode. The article was published in the August edition of 73 Magazine, and may be viewed at archive.

MJXS 71 1 3 It is a good question and clearly on-topic.

LM IC Pinout, Specifications, Equivalent & Datasheet

Second, the input voltage must be at least 3. I’m trying to troubleshoot a delinquent power supply I have. Q1 can provide as much base drive as you want in fact, as there is no series resistor between Q1 and the base – this is, if not a design “error”, then at least a design weakness.

Don’t know why your reply got downvoted, definitely of value. Get each one as they usually contain the same information presented in different ways. Be sure Vin does not exceed 35V!.

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