Yamaha SB168-ES Service Manual page 29

CY2302SXC-1T (XW492A0R)
ES: IC003
PLL (Clock Generator)
FBIN 1 8 VDD
IN 2 OUT2
7
GND 3 6 OUT1
FS0 4 5 FS1
LM3478MM (XZ914A00)
DC: IC90
FET CONTROLLER
ISEN VIN
1 8
COMP FAD/SD
2 7
FB DR
3 6
AGND PGND
4 5
FBIN
1
FS0
4
N
FS1
5
CHARGE
PHASE
IN
2
DETECTOR
PUMP
LOOP
FILTER
OUTPU T
VCO
BUFFER
OUTPU T
2
BUFFER
Fixed Frequency
FAD/SD
Oscillator
Detect
Slope
Compensation
Soft-start
1.26V
Ramp
Reference
–
Adjust
COMP +
+
V-l
EA Converter
FB
–
–
Overvoltage
Comparator
+
350mV
–
Short-circuit
One
Comparator
Shot
ISEN +
Level
Shifter
AGND
VDD
7
GND
3
OUT1
6
OUT2
8
Shutdown
Detect
Under-
voltage
Lockout
Set/Blankout
7.2V
Bias
Voltages
Thermal
Shutdown
l-V
Converter
–
Switch
Logic
+
PWM
Comparator
R S
Q
Switch
Driver
SB168-ES
VIN
DR
PGND
29