MAX1578-MAX1579 Datasheet, PDF (8/13 Pages) Maxim Integrated Products – Complete Bias and White LED Power Supplies for Small TFT Displays

Complete Bias and White LED Power Supplies
for Small TFT Displays
Block Diagram
IN
GND
COMP
1MHz
OSCILLATOR
BIAS
PWM
CONTROL
REF
OSC
OVERVOLTAGE
PROTECTION
LX
N
PGND
OUT
CTRL
ONBIAS
170mV
TIMER
CHARGE-PUMP
CONTROL
SHUTDOWN
SEQUENCING
OSC
DIVIDE BY FOUR
OSC
MULTIMODE
CHARGE PUMP
1.5X/2X
PMP
PMPB
DIVIDE BY 64
5V LDO
SHUTDOWN
CS
C1P
C1N
C2P
C2N
V_DD
MAIN
N
CD2
-2X INVERTING
CD1
CHARGE PUMP
NEG
N
SHUTDOWN
MAX1578
MAX1579
3X POSITIVE
CHARGE PUMP
SHUTDOWN
CU1
CU2
CU3
POS
N
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