LP3933 datasheet(3/18 Pages) NSC

3 / 18 page

Pin Description

Pin #

Name

Type

Description

Input

Boost Converter Feedback

GND_BOOST

Ground

Power Switch Ground

Output

Open Drain, Boost Converter Power Switch

DD2

Power

Supply Voltage for Internal Digital Circuits

GND2

Ground

Ground Return for V

DD2 (Internal Digital)

CLED1

Output

Open Drain, CLED1 Output

CLED2

Output

Open Drain, CLED2 Output

GND_WLED

Ground

Ground for WLED and CLED Drivers

WLED1

Output

Open Drain, White LED1 Output

WLED2

Output

Open Drain, White LED2 Output

WLED3

Output

Open Drain, White LED3 Output

WLED4

Output

Open Drain, White LED4 Output

Input

Oscillator Resistor

DD1

Power

Supply Voltage for Internal Analog Circuits

GND1

Ground

REF

Output

Internal Reference Bypass Capacitor

GND3

Ground

NRST

Logic Input

Low Active Reset Input

Logic Input

SPI Slave Select

Logic Output

SPI Serial Data Output

Logic Input

SPI Serial Data Input

SCK

Logic Input

SPI Clock

PWM_LED

Logic Input

LED Control for On/Off or Dimming Control

DD_IO

Power

Supply Voltage for Logic IO Signals

GND4

Ground

Output

Open Drain Output, Blue LED 2

Output

Open Drain Output, Green LED 2

Output

Open Drain Output, Red LED 2

GND_RGB

Ground

RGB Driver Ground

Output

Open Drain Output, Red LED 1

Output

Open Drain Output, Green LED 1

Output

Open Drain Output, Blue LED 1

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