NAD T 187 Service Manual page 72

PSU-MDC - Q8402
PSU-MDC - U8401
PSU-MDC - U8402
UCC28600
REF
On−Chip
Thermal
Shutdown
STATUS
8
SS
1
C
SS
+
REF
20K
Feedback
FB
2
+
C
R
BULK
SU
VDD
6
UVLO
5.0
VREF
Fault Logic
UVLO
REF_OK
LOAD_OVP
OVR_T
LINE_OVP
STATUS
CS
SS_DIS
BURST
SS_OVR
RUN
Oscillator
RUN
SS_OVR QR_DONE
OSC_CL
CLK
Green Mode
OSC_CL
FB
PL
FB_CLAMP
1.2V
GAIN = 1/2.5
1.5R
R
R
DD
R
C
OVP1
DD
R
OVP2
OVP
7
+
26V
13/8V
QR Detect
OUT
LOAD_OVP
LINE_OVP
CS
BURST
QR_DONE
REF
Q
D
SET
Q
CLR
Modulation
Comparison
400 mV
72
From Auxiliary
Winding
VDD
13V OUT
5
CS
3
R
PL
R
CS
GND
4