LP55231 datasheet(50/59 Pages) TI2

Part #	LP55231

Description	LP55231 Nine-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump - WQFN

PDF	59 Pages

Scroll/Zoom	100%

Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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50 / 59 page

To LEDs

C1-

INT

ASEL0

ASEL1

VOUT

C2-

SDA

SCL

TRIG

Vias to GND plane

Control signals

Input Voltage

LP55231

SNOSCR5D – MARCH 2013 – REVISED DECEMBER 2016

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Product Folder Links: LP55231

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9 Power Supply Recommendations

The device is designed to operate from an input voltage supply range between 2.7 V and 5.5 V. In a typical

application this is from single Li-ion battery cell. This input supply must be well regulated and able to withstand

maximum input current and maintain stable voltage without voltage drop even at load transition condition (start-

up or rapid brightness change). The resistance of the input supply rail should be low enough that the input

current transient does not cause drop below a 2.7-V level in the LP55231 supply voltage.

10 Layout

10.1 Layout Guidelines

Place capacitors as close as possible to the LP55231 device to minimize the current loops. Example of LP55231

PCB layout and component placement is seen in Figure 32.

10.2 Layout Example

Figure 32. Layout Example for LP55231

LP55231 Datasheet(PDF) 50 Page - Texas Instruments