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LP55231 bảng dữ liệu(PDF) 50 Page - Texas Instruments

tên linh kiện LP55231
Giải thích chi tiết về linh kiện  LP55231 Nine-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump - WQFN
PDF  59 Pages
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nhà sản xuất  TI2 [Texas Instruments]
Trang chủ  https://www.ti.com
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LP55231 bảng dữ liệu(HTML) 50 Page - Texas Instruments

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To LEDs
C1-
INT
D1
ASEL0
ASEL1
VOUT
C2-
SDA
SCL
TRIG
D9
D8
Vias to GND plane
Control signals
Input Voltage
50
LP55231
SNOSCR5D – MARCH 2013 – REVISED DECEMBER 2016
www.ti.com
Product Folder Links: LP55231
Submit Documentation Feedback
Copyright © 2013–2016, Texas Instruments Incorporated
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



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