Rainbow Electronics MAX686 - Manual (Page 15)

MAX686
DAC-Controlled Boost/Inverter
LCD Bias Supply with Internal Switch
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Functional Diagram
V
DD
V CC
GND
BIAS
MAX686
DN
POL
POK
PGND
ISET
LX
DACOUT
REF
1.25V
1.125V
1.125V
ERROR
AMP
FB
UP
DIGITAL
INTERFACE
ON-TIME/
OFF-TIME
CONTROL
CURRENT-LIMIT
COMPARATOR
POK
COMPARATOR
BANDGAP
REFERENCE
SHDN
LCDON
6-BIT
DAC