Rainbow-electronics MAX686 Manuel d'utilisateur télécharger pdf (Page 8)

MAX686

DAC-Controlled Boost/Inverter

LCD Bias Supply with Internal Switch

8 _______________________________________________________________________________________

MAX686

OUT

22pF

= 0.8V TO 27.5V

SHDN

POL

GND PGND

22µH

DACOUT

LCDON

REF

POK

ISET

0.1µF

MBR0530L

ON/OFF

DAC CONTROL

15µF

4.7µF

= 2.7V TO 5.5V

0.1µF

Figure 1. Boost Configuration: Positive Output Voltage

MAX686

≤

OUT

≤ 27.5V

MBRO530L

NEGATIVE

OUTPUT

VOLTAGE

= 0.8V TO 27.5V

POL

SHDN

GND PGND

DACOUT

LCDON

REF

POK

ISET

0.1µF

2.2µF

22µH

2Ω

2.2µF

R2R1

ON/OFF

DAC CONTROL

100pF

= 2.7V TO 5.5V

0.1µF

15µF

Figure 2. Negative Output Voltage Application Circuit

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Maxim Integrated Products 1
Dice are specified at T 1
= +25°C, DC parameters only 1
ABSOLUTE MAXIMUM RATINGS 2
ELECTRICAL CHARACTERISTICS 2
Pin Description 7
Detailed Description 9
Design Procedure 10
Setting the Output Voltage 11
Selecting Inductors 11
Table 1. Component Suppliers 12
Applications Information 13
Layout Considerations 14
Connecting V 14
Functional Diagram 15
QSOP.EPS 16

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Rainbow-electronics MAX686 Manuel d'utilisateur Page 8

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