Rainbow Electronics MAX1579 - Manual (Page 8)

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