LP3933 Datasheet, PDF (3/18 Pages) National Semiconductor (TI) – Lighting Management System for Six White LEDs and Two RGB or FLASH LEDs

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
25
26
27
28
29
30
31
32
Name
FB
GND_BOOST
SW
V_DD2
GND2
CLED1
CLED2
GND_WLED
WLED1
WLED2
WLED3
WLED4
RT
V_DD1
GND1
V_REF
GND3
NRST
SS
SO
SI
SCK
PWM_LED
V_{DD_IO}
GND4
B2
G2
R2
GND_RGB
R1
G1
B1
Type
Input
Ground
Output
Power
Ground
Output
Output
Ground
Output
Output
Output
Output
Input
Power
Ground
Output
Ground
Logic Input
Logic Input
Logic Output
Logic Input
Logic Input
Logic Input
Power
Ground
Output
Output
Output
Ground
Output
Output
Output
Description
Boost Converter Feedback
Power Switch Ground
Open Drain, Boost Converter Power Switch
Supply Voltage for Internal Digital Circuits
Ground Return for V_DD2 (Internal Digital)
Open Drain, CLED1 Output
Open Drain, CLED2 Output
Ground for WLED and CLED Drivers
Open Drain, White LED1 Output
Open Drain, White LED2 Output
Open Drain, White LED3 Output
Open Drain, White LED4 Output
Oscillator Resistor
Supply Voltage for Internal Analog Circuits
Ground
Internal Reference Bypass Capacitor
Ground
Low Active Reset Input
SPI Slave Select
SPI Serial Data Output
SPI Serial Data Input
SPI Clock
LED Control for On/Off or Dimming Control
Supply Voltage for Logic IO Signals
Ground
Open Drain Output, Blue LED 2
Open Drain Output, Green LED 2
Open Drain Output, Red LED 2
RGB Driver Ground
Open Drain Output, Red LED 1
Open Drain Output, Green LED 1
Open Drain Output, Blue LED 1
3
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