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LP55231SQE/NOPB Datasheet(PDF) 10 Page - Texas Instruments

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Part # LP55231SQE/NOPB
Description  LP55231 Programmable 9-Output LED Driver
PDF  57 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP55231SQE/NOPB Datasheet(HTML) 10 Page - Texas Instruments

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CHARGE PUMP
1x/1.5x
C2
0.47 PF
C1
0.47 PF
COUT
1 PF
VOUT
C1+
C1-
C2+
C2-
D/A
D1
D2
D6
D7
D8
D9
PROGRAM
MEMORY
50H TO 6FH;
96 INSTRUCTIONS
PWM PATTERN
GENERATOR
PWM PATTERN
GENERATOR
PWM PATTERN
GENERATOR
12-BIT PWM
PATTERN
CONTROL
8 BIT
MAXIMUM
CURRENT
CONTROL
IDAC AND HIGH
SIDE LED
DRIVERS
SCL
SDA
EN
CLK
INT
ASEL1
ASEL0
TRIG
SERIAL
DATA
CTRL
REG
POR
THERMAL
SHUTDOWN
CLK
DET
1.25-MHz
OSCILLATOR
BIAS
VREF
CONTROL
GND
CIN
1 PF
VDD
VDD
TEMP
COMP
Copyright © 2016, Texas Instruments Incorporated
10
LP55231
SNOSCR5B – MARCH 2013 – REVISED MAY 2016
www.ti.com
Product Folder Links: LP55231
Submit Documentation Feedback
Copyright © 2013–2016, Texas Instruments Incorporated
7 Detailed Description
7.1 Overview
The LP55231 is a fully integrated lighting management unit for producing lighting effects for mobile devices. The
LP55231 includes all necessary power management, high-side current sources, temperature compensation, two-
wire control interface and programmable pattern generators. The overall maximum current for each driver is set
by an 8-bit register.
The LP55231 controls LED luminance with a pulse-width modulation (PWM) scheme with a resolution of 12 bits.
Also, the temperature compensation is done by PWM.
7.2 Functional Block Diagram



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