
POWER BOARD
TABLE OF CONTENTS
IC INTERNAL BLOCK DIAGRAM ....................................... 8-1
Circuit Diagram .................................................................... 8-2
PCB Layout .......................................................................... 8-3
Electrical Parts List .............................................................. 8-4
8-1
8-1
KA5M02659RN INTERNAL BLOCK DIAGRAM
OSCILLATOR
+
1
-
+
2
3
-
7
14
12
10
11
9
8
C1
E1
C2
E2
VCC
RT
CT
VREF
GND
13
1
6
5
4
2
16
15
BAND GAP
REFERENCE
OUTPUT CONTROL
DEAD
TIME
CONTROL
EA(+)
EA(-)
EA(+)
EA(-)
PWM
COMP
COMP INPUT
0.7MA
1.2V
D
Q
Q
CK
5V
uA
V
CC
32V
5 A
5V
2.5R
1R
1mA
0.1V
+
OVER VOLTAGE S/D
+
7.5V
27V
Thermal S/D
S
R
Q
Power on reset
+
L.E.B
S
R
Q
OSC
5V
Vref
Internal
bias
Good
logic
SFET
DRAIN
GND
FB
Soft Start
9V
*
KA7500C INTERNAL BLOCK DIAGRAM
Summary of Contents for FWD39
Page 7: ...1 7 ...
Page 17: ...2 2 REPAIR INSTRUCTIONS 2 2 ...
Page 18: ...2 3 REPAIR INSTRUCTIONS 2 3 ...
Page 22: ...4 1 BLOCK DIAGRAM 4 1 ...
Page 23: ...4 2 WIRING DIAGRAM 4 2 ...
Page 37: ...SYSTEM BLOCK DIAGRAM 7 4 7 4 ...
Page 38: ...CIRCUIT DIAGRAM MAIN BOARD 7 5 7 5 A B C D E A B C D E 1 2 3 4 5 6 1 2 3 4 5 6 ...
Page 40: ...7 7 7 7 CIRCUIT DIAGRAM MAIN BOARD SERVO PART A B C D E A B C D E 1 2 3 4 5 6 7 1 2 3 4 5 6 7 ...
Page 42: ...PCB LAYOUT MAIN BOARD TOP VIEW 7 9 7 9 A 1 2 3 4 5 6 7 B C D E F A B C D E F 1 2 3 4 5 6 7 ...