Pioneer AVIC-D3/XU/UC Service Manual page 271

5
- Block Diagram Chart
SOFTSTART1
Skip Comp.
FB1
INV1
0.85 V
CT
FLT
_
+
0.85 V+12%
0.85 V+12%
+
_
0.85 V –19.4%
+
_
0.85 V –19.4%
FB2
INV2
PWM/SKIP
0.85 V
SOFTSTART2
SFT1
STBY1
STBY2
0.85 V
REF
5V_STBY
GND
0.85 V +7%
5
6
SOFTSTART1
PWM Comp.
_
+
_
+
+
Err Amp.
OSC
OVP1
UVLO
STBY1
SIGNAL
_
OVP2
STBY2
+
UVP1
Timer
UVP2
_
Err Amp.
+
+
_
+
Skip Comp.
UVLO
SIGNAL
SOFTSTART2
SFT2
VCC
Vref
5 VREG
+
INV2
+
INV1
_
_
PGcomp4
PGcomp3
0.85 V +7%
AVIC-D3/XU/UC
6
7
_
DLY
+
DLY
–(VCC –VTRIP1)
Current Comp.
Current
Protection
Trigger
VCC –VTRIP1
VCC –VTRIP2
Phase
Inverter
HSD Trip
LSD Trip
–(VCC –VTRIP2)
DLY
PWM Comp.
_
DLY
+
_
+
UVLO
Comp.
_
_
+
INV1
+
PGcomp1
0.85 V –7%
_
INV2
+
PGcomp2
0.85 V –7%
7
8
LH1
OUT1_u
LL1
OUT1_d
OUTGND1
_
LSD Trip
+
+
HSD Trip
_
TRIP1
VCC
_
TRIP2
+
_
+
OUTGND2
OUT2_d
LL2
OUT2_u
LH2
5.0 V
VREF5
REG5V_IN
4.5 V
POWERGOOD
271
8
A
B
C
D
E
F