Sanyo DP55360 Service Manual page 33

IC1650, IC6601, IC600 DC to DC Converter
IC1670, DC to DC Converter
UVLO
R10 = 4.3kΩ
R1 = 27kΩ
FB
COMP
R3 = 10kΩ
R2 = 2.4kΩ C4 = OPEN
C3 = 6800pF
SS
C6 = 0.015μF
EN
H : ON or OPEN
L : OFF
Current Sense
Amp
- -
OSC Error PWM
370kHz Amp comparator
+ +
Internal Stable
supply
V IN
Internal
Vref
TSD
Regulator
0.8V
BOOT (SW+Vreg.)
BOOT
Pre Drive
Pre Drive
+ -
Current
Limit Logic
Internal regulator
(5V)
– 33 –
C2 = 10μF/25V
Rb = 0
C1 = 0.01μF
1 : N
SW
L1 = 10μH
C5 = 22μF/16V
GND
•
C1,C8,C5,C9 = Ceramic capacitor
•
L1 = CDRH105RNP-100NC (sumida)
V IN = 12V
C8 = 10μF/25V
V OUT = 3.3V
C9 = 22μF/16V