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LP55281TL/NOPB bảng dữ liệu(PDF) 22 Page - Texas Instruments

tên linh kiện LP55281TL/NOPB
Giải thích chi tiết về linh kiện  LP55281 12-Channel RGB/White-LED Drive With SPI, I2C Interface
PDF  42 Pages
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nhà sản xuất  TI2 [Texas Instruments]
Trang chủ  https://www.ti.com
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LP55281TL/NOPB bảng dữ liệu(HTML) 22 Page - Texas Instruments

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Copyright © 2016, Texas Instruments Incorporated
SW
BATTERY
LDO
Analog
supply
voltage
LP55281
Digital
supply
voltage
LBoost
CVDDA
1 PF
CVDD
100 nF
CIN
10 PF
VDDA
VDD2
VDD1
2.8V
Copyright © 2016, Texas Instruments Incorporated
SW
BATTERY
VDD1
LBoost
VDDA
LDO
Analog
supply
voltage
2.8V
LP55281
Digital
supply
voltage
LDO
2.8V
VDD2
CIN
10 PF
CVDDA
1 PF
CVDD
100 nF
22
LP55281
SNVS458D – JUNE 2007 – REVISED OCTOBER 2016
www.ti.com
Product Folder Links: LP55281
Submit Documentation Feedback
Copyright © 2007–2016, Texas Instruments Incorporated
7.3.5 7-V Shielding
To shield the LP55281 device from high-input voltages (6 V to 7.2 V), the use of an external 2.8-V LDO is
required. This 2.8-V voltage protects internally the device against high voltage condition. The recommended
connection is shown in the picture below. Internally both logic and analog circuitry works at 2.8-V supply voltage.
Both supply voltage pins should have separate filtering capacitors. TI recommends pulling down the external
LDO voltage when it is disabled in order to minimize the leakage current of the LED outputs.
Figure 16. LP55281 With 7-V Shielding
In cases where high voltage is not an issue, the alternative connection is shown below.
Figure 17. LP55281 Without 7-V Shielding



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