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Old 31st July 2014, 04:14 PM   #21
biju55 is offline biju55  India
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Have you not installed the the gate resistors for the out put MOSFET s ? .
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Old 31st July 2014, 04:15 PM   #22
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Have you not installed the the gate resistors for the out put MOSFET s ? .
it is on the daughter board
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Old 31st July 2014, 04:16 PM   #23
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not so easily. you can take out one pair (one on the ccs side one on the - side) to reduce heat dissipation. normally the mosfets dont get hurt as the current floating through them is the same for + and - leg.
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Old 31st July 2014, 04:17 PM   #24
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not so easily. you can take out one pair (one on the ccs side one on the - side) to reduce heat dissipation. normally the mosfets dont get hurt as the current floating through them is the same for + and - leg.
you mean to remove a pair of mosfets? I have 3 pairs of mosfets.
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Old 31st July 2014, 04:19 PM   #25
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then remove 2 but NOT the pair where the Feedback lines are connected
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Old 31st July 2014, 04:30 PM   #26
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then remove 2 but NOT the pair where the Feedback lines are connected
i'm sorry, which is the feedback pair? Is it Q5 and Q7?
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Old 31st July 2014, 06:12 PM   #27
uli is offline uli  Austria
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the pair where R13,15 is connected to
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Old 31st July 2014, 08:14 PM   #28
rayma is offline rayma  United States
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it is on the daughter board
The gate resistors must be VERY close to the gates, or oscillation can happen

Last edited by rayma; 31st July 2014 at 08:15 PM. Reason: addition
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Old 1st August 2014, 02:12 PM   #29
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The gate resistors must be VERY close to the gates, or oscillation can happen
it is.
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Old 1st August 2014, 02:14 PM   #30
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the pair where R13,15 is connected to
Thanks, Uli.

Those are Q5 and Q7.
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