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MAX14515

High-Voltage Liquid Lens Driver

Maxim Integrated 

High-Voltage Liquid Lens Driver

Typical Operating Characteristics (continued)

(VDD = +2.8V, TA = +25°C, CLENS = 220pF, unless otherwise noted.)

SCL

2V/div

SDA

2V/div

SLEEP MODE OFF

MAX14515 toc19

VA - VB

50V/div

500μs/div

Pin Description

PIN

NAME

A1

SCL I2C Open-Drain Serial Clock Input

B1

SDA I2C Open-Drain Serial Data Input/Output

FUNCTION

A2

EN Enable Input. Drive EN high for normal operation. Drive EN low to enter shutdown mode.

B2

VDD Input Supply Voltage. Bypass VDD to GND with a 0.1µF capacitor as close to the device as possible.

A3

GND Ground

B3

VREF

Reference Voltage. Connect a 1µF ceramic capacitor from VREF to GND as close to the device as possible.

VREF is nominally +5V. Do not use VREF to drive external circuitry.

A4

VA High-Voltage Output. Connect to terminal 1 of liquid lens.

B4

VB High-Voltage Output. Connect to terminal 2 of liquid lens.

SDA SCL EN

Functional Diagram

VDD

I2C

REF

5V CHARGE

PUMP

OSCILLATOR

OUTPUT PEAK

REGULATION

MAX14515

50V CHARGE

PUMP

FREQUENCY

DIVIDER

H-BRIDGE

CONTROLLER

VA

H-BRIDGE

VB

VREF

GND

8 _______________________________________________________________________________________

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