Sony NW-E103 - Main Board

8
NW-E103/E105/E107
• IC Block Diagrams
IC301 NJM2776RB2 (TE2)
– MAIN Board –
1
V+2
OUT R
STB_TC
IN R
VREF
V+1
X_MUTE
8
9
10
REG
5
2
3
6
7
4
BIAS
IN L
OUT L
GND
VREF AMP
IC503, IC507 XC9105D091MR
3
4
2 1
VREF WITH
SOFT START,
CHIP ENABLE
CURRENT
RIPPLE DETECTION
AND FB
PHASE
COMPENSATION
BUFFER,
DRIVER
RAMP WAVE
GENERATOR,
OSC
5
GND EXT
VDD
CE VDD FB
VDD
PWM/PFM
CONTROLLER
PWM
COMPARATOR
ERROR
AMP
IC508 XC62HR2802MR IC801 SM8142BD-G-EL
NC
VIN
CE
VSS
VOUT
CURRENT
RESTRICTION
OUTPUT
CONTROL
4
5
1
2
+
–
THE SOURCE OF
CONSTANT VOLTAGE
3
8
LDR
7
CHV
6
OUT1
5
OUT2
1
VSS
2
OSC
3
ENA
4
VDD
High voltage
switching circuit
Dividing circuit
Dividing circuit
Oscillator for
boosting voltage and EL driver