MAX686 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX686 Datasheet PDF : 16 Pages
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DAC-Controlled Boost/Inverter
LCD Bias Supply with Internal Switch
VIN = 0.8V TO 27.5V
15µF
VCC = 2.7V TO 5.5V
0.1µF
DAC CONTROL
ON/OFF
L1
22µH
VCC
LX
VDD
DACOUT
LCDON
FB
MAX686
UP
DN
POK
SHDN
REF
POL
GND
ISET
PGND
D1
MBR0530L
R2
R3
4.7µF
CF
22pF
VOUT
0.1µF
R1
0.1µF
Figure 1. Boost Configuration: Positive Output Voltage
VIN = 0.8V TO 27.5V
15µF
VCC = 2.7V TO 5.5V
0.1µF
DAC CONTROL
ON/OFF
L1
22µH
VCC
LX
VDD
DACOUT
POL
LCDON
FB
MAX686
UP
DN
REF
SHDN
POK
ISET
GND
PGND
R4
2Ω
2.2µF
D2
MBRO530L
R3
D1
MBRO530L
R1
0.1µF
CF
100pF
R2
NEGATIVE
OUTPUT
VOLTAGE
VIN ≤ |VOUT| ≤ 27.5V
2.2µF
Figure 2. Negative Output Voltage Application Circuit
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