Prescalar

1

Register

Prescalar

0

Register

PWM 1

Register

PWM 0

Register

Oscillator

Power-On Reset

VDD

RST

0

1

LED0

0

1

LED7

Bit 7 of Select Register LS1

Bit 6 of Select Register LS1

Bit 7 of Input Register1

PWM0 Register

PWM1 Register

Programming Example (See end of datasheet

for complete example)

COPIES

Bit0

of

Select

Register

LS0

Bit1

LED Select Register

Input Register

Bit0 of Input Reg 1

I

2

C

Filters

I

2

C Bus

Control

A2 A1 A0

SCL

SDA

LP3944

www.ti.com

SNVS264A – MAY 2004 – REVISED APRIL 2013

Architectural Block Diagram

For explanation of LP3944 operation, please refer to Theory of Operation in Application Notes.

Figure 2. Block Diagram

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Copyright © 2004–2013, Texas Instruments Incorporated

Submit Documentation Feedback

3

Product Folder Links: LP3944