LP3942 Datasheet, PDF (3/20 Pages) National Semiconductor (TI) – The Dual RGB LED Controller with 1.5x/2x Charge Pump and SPI Interface

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
SS
SI
SCK
R1
G1
B1
GND3
B2
G2
R2
P_OUT
C1P
V_IN
C2N
GND1
C1N
C2P
V_DD
GND2
I_BIAS
I_R
I_G
I_B
NRST
Type
Logic Input
Logic Input
Logic Input
Output
Output
Output
Ground
Output
Output
Output
Output
Power
Ground
Power
Ground
Input
Input
Input
Input
Logic Input
Description
SPI Slave Select
SPI Serial Data
SPI Clock
Open Drain, Red LED (1)
Open Drain, Green LED (1)
Open Drain, Blue LED (1)
Ground 3
Open Drain, Blue LED (2)
Open Drain, Green LED (2)
Open Drain, Red LED (2)
Charge Pump Output
Flying capacitor C1 connection
Input voltage from battery
Flying capacitor C2 connection
Ground 1
Flying capacitor C1 connection
Flying capacitor C2 connection
LDO/Supply voltage input
Ground 2
Bias resistor connection
Red LED current set resistor
Green LED current set resistor
Blue LED current set resistor
Low active reset input pin. (Internal pull down 1 MΩ)
3
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