Sony PRS-505/SC - Portable Reader System Service Manual page 30

PRS-505
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
+
IC402 XC9226A296MR
IC403 XC9226A196MR
R2
R1
VIN 1
VSS 2
R3
R4
CE/MODE(EN) 3
30
+
–
VOLTAGE
REFERENCE
4
CURRENT
LIMIT
3
Phase
Compesation
+
+
-
-
Vref with
PWM/PFM
Soft Start,
Selector
CE
+
Logic
-
4 VIN
3 VOUT
VIN
VOUT
Current Feedback
Current Limit
Synch.
Logic
Buffer
Drive
Ramp Wave
Generator
OSC
CE/MODE
Control
Logic
5
Lx(SW)
4
Vout(CE)