The LMHVT uses a TO-. plastic package. The LMHV is rated for operation from −55˚C to +˚C, and the LMHV from 0˚C to. +˚C. Features. LMHVT Datasheet, LM A High-Voltage Adjustable Positive Voltage Regulator Datasheet, buy LMHVT. LMHVT uses a TO plastic package. The Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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Jan 25, 1. Feb 22, This is my first power supply from scratch so I figured that linear would be simpler to understand and construct than a SMPS.
Trouble with a LMHVT
Having searched through the forums for LM high current supplies I have found datasheft very helpful threads, mainly this one LM thread link So after viewing other circuits and consulting the LMHVT datasheet I have come up with the following design which ideally would give me a maximum voltage in-out differential of 60V.
The bypass circuit I have used is basically the one from the TI datasheet with a few adjustments.
Now the problems I have come across are as follows: I have read this discussed in the thread linked above however I couldn’t reconcile it with my design as it required the output voltage from the regulator to be less than half the input or the maths didn’t work. Not great not sure why I need it. Note about the load: The load this is primarily designed for will be a Royer oscillator induction heater. Ideally I would like to have V output so I can experiment with inputs but if a wider voltage range is attainable this would be preferable.
I have attached datasheets for quick access. BD NPN silicon power transistors. Jan 25, 2.
Jun 22, 7, 1, If you want a maximum of mA in the regulator, then set R1 to 7ohms, that will give a voltage drop of 0. Jan 25, 3. May 19, 1, 1, This is a pretty common circuit, very robust and stable.
I do see that you are lacking emitter resistors for Q2,3,4.
LMHVT datasheet & applicatoin notes – Datasheet Archive
I would start with. This will make the transistors share the load more equally. Do you use LTspice?
It would be an excellent program to optimize this circuit. Jan 25, 4. Jan 25, 5. Marcus You would actually dissipate That number is nothing compared to the wattage that Q2,3,4 will be dissipating.
[FOLLOW UP] Adjustable LM317HVT High current supply design
Jan 25, 6. Jan 25, 7. Nov 23, 2, Jan 25, 8. Jan 25, 9.
A fan blowing across a heat sink does wonderful things. Jan 25, By the way what is R4 doing and why is it so important it be at 30mA minimum? Nov 12, 3, 2, Jan 26, High voltage adjustable bipolar power supply Posted by coinmaster in forum: Adjustable voltage and current supply help Posted by SteveDouglas in forum: You May Also Like: An Introduction to Antenna Basics Antennas are used to transmit and receive electromagnetic energy.
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