Sony Walkman MZ-RH1 - Page 37

37
MZ-RH1
IC451 R2061K01-E2
IC471 BH25FB1WG-TR
SIO 1
SCLK 2
7 OSCIN
VSB
4
VCC
5
VDD
6
CE
12
CIN
10
VSS
11
LEVEL
SHIFTER
DELAY
REAL
TIME
CLOCK
/VDCC 3
VOLTAGE
DETECTOR
BATTERY
VOLTAGE
MONITOR
8 OSCOUT
9 /INTR
VOLTAGE
REFERENCE
THERMAL
PROTECTION
VOLTAGE
REFERENCE
CONTROL
BLOCK
OVER CURRENT
PROTECTION
VIN
1
GND
2
STBY
3
NC4
VOUT5
+
–
IC472 XC9103D092MR
EXT
5
GND
4
FB 1
VDD
2
CE 3
CURRENT
RIPPLE DETECT
& FB
+
–
ERROR AMP
+
–
PWM COMPARATOR
VREF WITH
SOFT START
& CE
RAMP WAVE
GENERATOR,
OSC
PWM/PFM
CONTROLLER
PHASE
COMPENSATION
BUFFER,
DRIVER
VCC