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Isolated buck/boost converter?
- Thread starter LukeL
- Start date
MacGyverS2000
Electrical
- Thread starter
- #3
There are many good ones. It's hard to justify not using a fully designed implementation out of National's design workbench area.
Click a button and you can have the entire kitted system sent to you with a circuit board.
Perhaps they don't have isolation.
Keith Cress
kcress -
Click a button and you can have the entire kitted system sent to you with a circuit board.
Perhaps they don't have isolation.
Keith Cress
kcress -
Hello.
isolated.....
Can do 2 stages:
1st stage 1:2 transformer connected to H-bridge (with 4 power N-FETs) producing double ouput voltage. Can easy run with 500kHz, open loop (add few hundred mV for diodes drop).
Output will be 10 to 32V.
(check IR chips with oscilator inside and bootstrap for "all N-FETs")
Then Buck down to 9V with old and robust Unitrode chip UC2573 and external P-FET (say 50V, 8A).
I did 10000000 Bucks with this chip - never problem.
LM2587 - need to do isolated feedback (opto or something like this...). Plus - think what to do with wide input range. (I won't use this National chip)
thx
isolated.....
Can do 2 stages:
1st stage 1:2 transformer connected to H-bridge (with 4 power N-FETs) producing double ouput voltage. Can easy run with 500kHz, open loop (add few hundred mV for diodes drop).
Output will be 10 to 32V.
(check IR chips with oscilator inside and bootstrap for "all N-FETs")
Then Buck down to 9V with old and robust Unitrode chip UC2573 and external P-FET (say 50V, 8A).
I did 10000000 Bucks with this chip - never problem.
LM2587 - need to do isolated feedback (opto or something like this...). Plus - think what to do with wide input range. (I won't use this National chip)
thx
- Thread starter
- #7
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