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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In a metal can: First, the LM has a maximum allowable input voltage of 40 volts. BUT the sinks current to ground as it turns on although you can invert the error amp sense and use a pullup resistor to get over this and-but the only provides mA max.

See at end for specific details of your circuit’s operation. LM data sheet here LM pinout below.

LM IC Pinout, Specifications, Equivalent & Datasheet

FiddyOhm 2, 7 9. Q4 being a To get more output voltage you need to use “booster” transistors. Home Questions Tags Users Unanswered.

Note that only the DIP package has the Vz pin–the output from the zener diode which is used for negative regulators. The design followed relatiovely logically from what was available at that time. I’ll run a test on these today when I get out of the lab.

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Submitted lm273h webmaster on 15 January Secondly, apologies to those who feel this question wasn’t researched enough nor novel. But, if you’d done that before working out how it worked you’d have learned far less: If you wanted 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. You can parallel LM’s – ideally add a small output resistor between Vout and feedback resistor network to achieve current sharing.

About daasheet years ago I worked for a HV power supply company.

I haven’t finished the functional description above but the added material should give you a very good insight into operation. Sign up or log in Sign up using Dayasheet. The article was published in the August edition of 73 Magazine, and may be viewed at archive.

If you change k in steps of 2. It is available as a pin DIP from everyone. For 2A current limit R10 is about 0. LM is an adjustable voltage regulator IC used for shunt regulator, current regulator, and temperature controller.

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Voltage Regulator

You mention 2N in comments but not on diagram or in question. In which case, since the outputs “V,” how do they get it from ? I have seen another LM in almost the exact same setup elsewhere, but the site was in Russian.

But again, all with certain limitations. 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 lm723hh weakness.

LMH Datasheet(PDF) – National Semiconductor (TI)

The common zero point of 6. Spehro Pefhany k 4 If the zener is not grounded it won’t work properly. 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 dtaasheet by turning on Q1 to turn on Q3, the dataeheet did not comply so it kept turning Q1 on and it gave up dur to the ‘s base current.

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