Pioneer PDP 507CMX, Service Manual

Page: 207 / 210

PDP-507CMX
207
5 6 7 8
5 6
7
8
C
D
F
A
B
E
No. Pin Name Pin Function
1
2
3
4,26
5
6
7
8
9
11–14
16
18–21
23
24
25
27
28
30
29
31
32
10,15,17,22
R / C
Vref
Remote ON / OFF control
Internal reference voltage output
Oscillation frequency select
Control circuit GND
Cut - off detect select
Control circuit power supply
Low side MOSFET drive circuit power supply
Low side MOSFET drive circuit GND
Low side MOSFET gate.Please do not conect the pin anywhere.
Output
Low side MOSFET sources
High side MOSFET power supply
High side MOSFET gate.Please do not conect the pin anywhere.
High side MOSFET drive circuit power supply
Over - cve detect at external resistance detection
Over - current - ve detect at external resistance detection
Internal error amplifier output
Internal error amplifier inverted input
Internal voltage detect resistor output
2.5V / 3.3V output select
Soft start condenser connection
Non - connection (not connected internally)
OSC
GND
LC
Vcc
Vboot
P.GND1
V
GL
V
OUT
V
DD
V
B
OCL+
OCL–
ampOUT
2.5V/3.3V
S / S
N / C
ampIN
smp–
P.GND2
V
GH
R/C
(L.Active )
S/S
UVLO
INVL
N/C : 10,15,17,22
CURRENT
LIMIT2
CURRENT
LIMIT3
CURRENT
LIMIT1
PWM-COMP
ampIN
OCL-
OCL-
2.5V/3.3V OCL+
amp-
OSC
Vref
V
OUT
Vref
V
DD
V
GH
V
OUT
V
B
V
boot
V
ref
V
cc
LC P.GND1
ampOUT
ERROR-AMP
V
GL
P.GND2
GND
ON/ OFF
CONTROL
BANDGAP
REFERENCE
1.26V
±
1%
THERMAL
SHUTDOWN
V
CC
LATCH
Q R S
S R Q
LATCH
S R Q
LATCH
S R Q
LATCH
OSC
+
-
-
+
-
+
-
+
-
+
+
-
+
-
+
-
+
-
+
3 31 30 25 27
4,26
28
29
32
1
6 2 23 18~21 24 7
11~14
8
9 16
5
MD3222N (LVDS ASSY : IC305)
• DC-DC Converter
Block Diagram
Pin Function