Sony PRS-505 Service Manual page 30

PRS-505
QQ
3 7 63 1515 0
IC204, 205, 409 XC6213B312NR
ON/OFF
CE 1
CONTROL
CURRENT
LIMIT
VSS 2
IC302 XC6215B152NR
IC303 XC6215B312NR
IC406 XC6215B292NR
ON/OFF
CE 1 EACH CIRCUIT
CONTROL
ERROR AMP
VOLTAGE
–
VSS 2
REFERENCE
+
TE
L 13942296513
IC402 XC9226A296MR
IC403 XC9226A196MR
R2
R1
VIN 1
Vref with
Soft Start,
VSS 2
www
R3
.
R4
CE/MODE(EN) 3
30
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+
–
VOLTAGE
REFERENCE
4 VIN
CURRENT
LIMIT
3 VOUT
Phase
Compesation
+
+
-
-
PWM/PFM
Selector
CE
Logic
x ao
y
i
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8
4 VIN
3 VOUT
Q Q
3 6 7 1 3
Current Feedback
Current Limit
Synch.
Logic
Buffer
Drive
Ramp Wave
Generator
OSC
CE/MODE
Control
u163
Logic
.
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
5
Lx(SW)
m
co
4
Vout(CE)
9 9
2 8 9 9