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LM3532TME-40A/NOPB bảng dữ liệu(PDF) 34 Page - Texas Instruments

tên linh kiện LM3532TME-40A/NOPB
Giải thích chi tiết về linh kiện  LM3532 High-Efficiency White LED Driver With Programmable Ambient Light Sensing Capability and I2C-Compatible Interface
PDF  52 Pages
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nhà sản xuất  TI2 [Texas Instruments]
Trang chủ  https://www.ti.com
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LM3532TME-40A/NOPB bảng dữ liệu(HTML) 34 Page - Texas Instruments

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VOUT up to 40V
VIN
IN
SW
OVP
ILED1
ILED2
ILED3
PGND
ALS2
ALS1
INT
Ambient Light
Sensor 1
Ambient Light
Sensor 2
VALS
VIN
HWEN
SDA
SCL
LM3532
COUT
CIN
L
D1
PWM1
PWM2
T0
LM3532
SNVS653E – JULY 2011 – REVISED AUGUST 2015
www.ti.com
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The LM3532 incorporates a 40-V (maximum output) boost, three high-voltage, low-side current sinks, and
programmable dual ambient light sensor inputs with internal-sensor gain selection. The device can drive up to 3
parallel high-voltage LED strings with up to 90% efficiency. The adaptive current regulation method allows for
different LED currents in each current sink, thus allowing for a wide variety of backlight-with-keypad applications.
8.2 Typical Application
Figure 23. LM3532 Typical Application
8.2.1 Design Requirements
For typical white LED applications, use the parameters listed in Table 20:
Table 20. Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
Input voltage range
2.7 V to 5.5 V
Output current
500 MHz typical
Boost switching frequency
2 MHz
34
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Product Folder Links: LM3532



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