LP3931 Datasheet, PDF (3/17 Pages) National Semiconductor (TI) – Dual RGB LED Driver with High Current Boost DC-DC Converter

Pin Description
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Name
G2
R2
GND_RGB
R1
G1
B1
GND_BOOST
SW
V_DD2
GND2
FB
V_REF
SO
SI
SS
SCK
PWM_LED
NRST
V_DDIO
RT
GND3
V_DD1
GND1
B2
Type
Output
Output
Ground
Output
Output
Output
Ground
Output
Power
Ground
Input
Output
Logic Output
Logic Input
Logic Input
Logic Input
Input
Logic Input
Power
Input
Ground
Power
Ground
Output
Description
Open Drain, Green LED2
Open Drain, Red LED2
RGB Driver Ground
Open Drain, Red LED1
Open Drain, Green LED1
Open Drain, Blue LED1
Power Switch Ground
Open Drain, Boost Converter Power Switch
Supply Voltage for Internal Digital Circuits
Ground
Boost Converter Feedback
Internal Reference Bypass Capacitor
SPI Serial Data Out
SPI Serial Data Input
SPI Slave Select
SPI Clock
LED Control for On/Off or PWM Dimming
Low Active Reset Input
Supply Voltage for Logic IO Signals
Oscillator Resistor
Ground
Supply Voltage for Internal Analog Circuits
Ground
Open Drain, Blue LED2
3
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