Mu lt i-Ou t p u t , Lo w -No is e P o w e r-S u p p ly
Co n t ro lle rs fo r No t e b o o k Co m p u t e rs
CSH_
CSL_
1X
REF
FROM
FEEDBACK
DIVIDER
MAIN PWM
COMPARATOR
BST_
DH_
LX_
R
Q
S
LEVEL
SHIFT
SLOPE COMP
OSC
0–MAX1635
30mV
SKIP
CURRENT
LIMIT
DAC
SHOOT-
THROUGH
CONTROL
CK
COUNTER
SHDN
SOFT-START
SYNCHRONOUS
RECTIFIER CONTROL
VL
R
S
Q
LEVEL
SHIFT
DL_
-100mV
PGND
REF
1µs
SINGLE-SHOT
SECFB
Figure 3. PWM Controller Detailed Block Diagram
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