Philips DVDR75/001 Service Manual page 239

Circuit-, IC descriptions and list of abbreviations
9.12.5ICs Digital Board Chrysalis
IC7106 NCP303LSN29, Digital Board 2.1 Chrysalis, Reset Circuit
2
t
IC7501 NCP1570D, Digital Board 2.1 Chrysalis, DC/DC Converter Control
V
–
CC
+
+
8.5 V/7.5 V
–
GND
V
FB
+
–
COMP
0.525 V
–
+
–
NCP303LSNxxT1
Open Drain Output Configuration
Input
V
ref
3 Gnd
UVLO COMP
–
+
+
0.25 V
–
Error Amp
–
PWM COMP
+
+
–
0.985 V
Σ
+
OSC
Art Ramp
80%, 200 kHz
+
0.25 V
–
PGDELAY Latch
–
S Q
+
0.89 V/0.69 V
R
Set Dominant
DVDR70 & DVDR75/0x1
1
R
D
5 C
D
NCP1570
Fault Latch
S Q
R
Set Dominant
PWM Latch
R Q
S
Reset Dominant
+
–
Reset Output
V
CC
GATE(H)
Non
Overlap
GATE(L)
12 µA
PGDELAY
PWRGD
–
+
+
3.3 V
–
9. EN 239