Sony PCM-D50 Service Manual page 52

PCM-D50
IC2102 XC9505B093AR (POWER Board (2/4))
EXT1 1
2
VDD
3
FB1
PWM1 4
EN1 5
IC2103 XC9226A336MR (POWER Board (2/4))
VIN 1
VSS 2
CE 3
52
PWM/PFM PWM/PFM
CONTROLLER CONTROLLER
PWM
COMPARATOR
ERROR AMP
RAMP WAVE RAMP WAVE
GENERATOR GENERATOR
OSC
VREF1=0.9V
EN1
EN1
PHASE
COMPENSATION
ERROR AMP
PWN/PFM
VREF,
SELECTOR
CE
UVLO COMP.
UVLO
10 EXT2
PWM
COMPARATOR
9 GND
ERROR AMP
8 FB2
7 PWM2
VREF2=0.9V
EN2 6 EN2
EN2
CURRENT FEEDBACK
CURRENT LIMIT
LOGIC DRIVER
RAMP WAVE
GENERATOR
CE/MODE
CONTROL
5 LX
4 VOUT