28 Sep
2023
28 Sep
'23
12:49 a.m.
On 2023-Sep-28, at 12:29 AM, Brent Hilpert via cctalk wrote:
...
Excessive current through Q5 produces a V-drop across R10 which may turn on Q7 to take
the PWM-mono into reset (E2.4=low).
D7,D8,R3 clamp and sink reverse voltage/energy from the T1 secondary to avoid reverse
breakdown/damage to Q1,Q2,Q3.
^^
correction: that should be R7, not R3.