Trip le -Ou t p u t P o w e r-S u p p ly
Co n t ro lle r fo r No t e b o o k Co m p u t e rs
MAX782
CS_
1X
60kHz
LPF
FB_
MAIN PWM
COMPARATOR
REF, 3.3V
(OR INTERNAL
5V REFERENCE)
BST_
R
Q
LEVEL
SHIFT
DH_
LX_
S
SLOPE COMP
OSC
MINIMUM
CURRENT
(IDLE-MODE)
25mV
VL
4µA
CURRENT
LIMIT
SHOOT-
THROUGH
CONTROL
0mV-100mV
30R
SS_
ON_
3.3V
1R
N
SYNCHRONOUS
RECTIFIER CONTROL
VL
R
Q
LEVEL
SHIFT
N
DL_
–100mV
S
PGND
N
1µs
SINGLE-SHOT
VDD REG
(SEE FIG. 2)
Figure 3. PWM Controller Block Diagram
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