NAD T 187, Service Manual

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