Datasheet 搜索 > LED驱动器 > TI（德州仪器） > LP55231SQX/NOPB 数据手册 > LP55231SQX/NOPB 用户编程技术手册 1/56 页
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LP55231SQX/NOPB 用户编程技术手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
LED驱动器
封装:
WQFN-24
描述:
LED 驱动器 IC 9 输出 DC DC 稳压器 切换式电容器（充电泵） PWM 调光 25.5mA 24-WQFN（4x4）
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P3Hot
典型应用电路图在P14P45P46
原理图在P1P5P6P10
封装尺寸在P51P53P54
标记信息在P51
封装信息在P50P51P52P53P54
技术参数、封装参数在P4P5P6
应用领域在P1P14P45P46P56
电气规格在P5P6
导航目录
LP55231SQX/NOPB数据手册
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若手册格式错乱，请下载阅览PDF原文件
LP55231
D1
D2
D4
D7
VOUT
C
OUT
1 PF
C
2
0.47 PF
ASEL0
ASEL1
GND
MCU
SCL
SDA
EN
CLK
TRIG
INT
C
IN
1 PF
V
IN
= 2.7V TO 5.5V
VDD
C
1
0.47 PF
C1+
C1-
C2+
C2-
B
G
R
D3
D8
B
G
R
B
G
R
D6
D5
D9
LP55231
D2
D3
D1
VOUT
C
OUT
1 PF
C
2
0.47 PF
ASEL0
ASEL1
GND
MCU
SCL
SDA
EN
CLK
TRIG
INT
C
IN
1 PF
V
IN
= 2.7V TO 5.5V
VDD
C
1
0.47 PF
C1+
C1-
C2+
C2-
D6
D5
D4
D9
D8
D7
RGB LED
APPLICATION
WLED APPLICATION
NOTE: D7, D8 AND D9 POWERED
DIRECTLY FROM V
IN
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LP55231
SNOSCR5A –MARCH 2013–REVISED OCTOBER 2014
LP55231 Programmable 9-Output LED Driver
1 Features 3 Description
The LP55231 is a 9-channel LED driver designed to
1
• Three Independent Program Execution Engines, 9
produce lighting effects for mobile devices. A high-
Programmable Outputs With 25.5 mA Full-Scale
efficiency charge pump enables LED driving over full
Current, 8-bit Current Setting Resolution and 12-
Li-Ion battery voltage range. The device is equipped
bit PWM Control Resolution
with an internal program memory, which allows
• Adaptive High-Efficiency 1x/1.5x Fractional
operation without processor control.
Charge Pump - Efficiency up to 94%
The LP55231 has an I
2
C-compatible control interface
• LED Drive Efficiency Up to 93%
with four pin-selectable addresses. The INT pin can
• Charge Pump With Soft Start and
be used to notify processor when a lighting sequence
has ended (interrupt -function). Also, the device has a
Overcurrent/Short-circuit Protection
trigger input interface, which allows synchronization,
• Built-in LED Test
for example, between multiple LP55231 devices.
• 200-nA Typical Standby Current
Excellent efficiency is maintained over a wide
• Automatic Power Save Mode; I
VDD
= 10 µA (Typ.)
operating range by autonomously selecting the best
charge pump gain based on LED forward voltage
• Two-Wire I
2
C-Compatible Control Interface
requirements. The device is able to automatically
• Flexible Instruction Set
enter power-save mode when LED outputs are not
• Large SRAM Program Memory
active, thus lowering idle current consumption down
to 10 µA (typ). Only four small and low-cost ceramic
• Small Application Circuit
capacitors are required.
• Source (High-side) Drivers
• Architecture Supports Color Control
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
2 Applications
LP55231 WQFN (24) 4.00 mm x 4.00 mm
• Fun Lights and Indicator Lights
(1) For all available packages, see the orderable addendum at
• LED Backlighting
the end of the datasheet.
• Haptic Feedback
• Programmable Current Source
Simplified Schematic
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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