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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 is a design from the dawn of solid state time that has much to teach. The zener 10,9 provides a stable voltage that the output can pull down to.

The Voltage Regulator Description: If you change k in steps of 2. The current limit is crude in that it has no “foldback” action – it limits current AT 2A if you try to draw too much. Thank you very much for your reply, this explains a lot in only a few lines. Sign up using Email and Password. But again, all with certain limitations. Russell McMahon k 9 If you wanted current limit the arrangement used was simple obvious and standard fare.

The new replacement had these two pins shorted internally. LM is an adjustable voltage regulator IC used for shunt regulator, current regulator, and temperature controller. This can be helpful if you are a beginner trying to decipher the terminology. IF you want to abandon this cct but keep it working If you can tolerate 1. The metal can and the flat-pack do not have enough pins and so they skip this one. Call ratio of R6: You can parallel LM’s – ideally add a small output resistor between Vout and feedback resistor network to achieve current sharing.


Home Questions Tags Users Unanswered. About 15 years ago I worked for a HV power supply company. This has led me into investigating the schematic, but try as I might, I can’t make heads nor tails of what’s going on. 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.

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.

It is available as a pin DIP from everyone. That makes a lot of sense.

National Semiconductor

Pin 6 provides a buffered reference voltage – the forerunner of a modern bandgap reference. My response below suggests a plug-in choice: TL — Programmable Reference Voltage. If the zener is not grounded it won’t work properly. For 2A current limit R10 is datashewt 0. Don’t worry, this question won’t stay closed.

Power supply with LM – Electrical Engineering Stack Exchange

The old one had 2 of the pins open while which were being used for voltage feedback sensing. Also, Q1 is a transistor – which I’m sure was just a mistake.


My question is more to do with how the circuit itself operates because I’m not sure. The current limit works by dropping voltage across R Post as a guest Name. I will try to search more thoroughly next time before asking.

Voltage Regulator

It acts to produce 6. The common zero point of 6. Note that only the DIP package has the Vz pin–the output from the zener diode which is used for negative regulators.

I know for sure the is okay and funnily enough discovered 3 out of 4 new ones I bought are nonfunctional. Vin is divided down and stood on top of as “pedestal’ made from Vref scaled down by Vr and R5. This is very much a design question and of great value to any who want to move beyond the datxsheet in a black box component” type of “design”. Several companies manufacture the LM, but the data sheets are pretty much the same.

I’m not overly familiar with such things but I suspect it was probably standard practice in that day. In which case, since the outputs “V,” how do they get it from ?

Does it imply there are actually two transistors connected in parallel?