LP3954TLSLASHNOPB datasheet(4/58 Pages) TI2

4 / 58 page

LP3954

SNVS340D – JUNE 2005 – REVISED MARCH 2013

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Table 1. Pin Descriptions

Pin No.

Name

Type

Description

Output

Boost Converter Power Switch

Input

Boost Converter Feedback

FLASH

Output

High Current Flash Output

Output

Red LED 1 Output

Output

Green LED 1 Output

Output

Blue LED 1 Output

GND_SW

Ground

Power Switch Ground

GND

Ground

VDDIO

Power

Supply Voltage for Input/output Buffers and Drivers

SS/SDA

Logic Input/Output

Slave Select (SPI), Serial Data In/Out (I2C)

IRGB

Input

Bias Current Set Resistor for RGB Drivers

GND_RGB

Ground

Ground for RGB Currents

GND_WLED

Ground

Ground for WLED Currents

IFLASH

Input

High Current Flash Current Set Resistor

SYNC_PWM

Logic Input

External PWM Control for LEDs or External Clock for RGB Sync

Logic Input

Serial Input (SPI), Address Select (I2C)

Logic Output

Serial Data Out (SPI)

Output

Red LED 2 output

WLED5

Output

White LED 5 output

WLED6

Output

White LED 6 output

VDD1

Power

Supply voltage

EN_FLASH

Logic Input

Enable for High Current Flash

SCK/SCL

Logic Input

Clock (SPI/I2C)

Output

Green LED 2 Output

WLED3

Output

White LED 3 output

WLED4

Output

White LED 4 output

ASE

Input

Audio Synchronization Input

IRT

Input

Oscillator Frequency Resistor

IF_SEL

Logic Input

Interface (SPI or I2C compatible) Selection (IF_SEL = 1 for SPI)

Output

Blue LED 2 Output

WLED1

Output

White LED 1 Output

WLED2

Output

White LED 2 Output

GNDA

Ground

Ground for Analog Circuitry

VREF

Output

Reference Voltage

VDDA

Power

Internal LDO Output

VDD2

Power

Supply Voltage

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