LP3931ISQ datasheet(3/17 Pages) NSC

Part #	LP3931ISQ

Description	Dual RGB LED Driver with High Current Boost DC-DC Converter

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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Pin Description

Pin #

Name

Type

Description

1

G2

Output

Open Drain, Green LED2

2

R2

Output

Open Drain, Red LED2

3

GND_RGB

Ground

RGB Driver Ground

4

R1

Output

Open Drain, Red LED1

5

G1

Output

Open Drain, Green LED1

6

B1

Output

Open Drain, Blue LED1

7

GND_BOOST

Ground

Power Switch Ground

8

SW

Output

Open Drain, Boost Converter Power Switch

9V

DD2

Power

Supply Voltage for Internal Digital Circuits

10

GND2

Ground

11

FB

Input

Boost Converter Feedback

12

V

REF

Output

Internal Reference Bypass Capacitor

13

SO

Logic Output

SPI Serial Data Out

14

SI

Logic Input

SPI Serial Data Input

15

SS

Logic Input

SPI Slave Select

16

SCK

Logic Input

SPI Clock

17

PWM_LED

Input

LED Control for On/Off or PWM Dimming

18

NRST

Logic Input

Low Active Reset Input

19

V

DDIO

Power

Supply Voltage for Logic IO Signals

20

RT

Input

Oscillator Resistor

21

GND3

Ground

22

V

DD1

Power

Supply Voltage for Internal Analog Circuits

23

GND1

Ground

24

B2

Output

Open Drain, Blue LED2

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LP3931ISQ Datasheet(PDF) 3 Page - National Semiconductor (TI)

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