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LM3532 bảng dữ liệu(PDF) 16 Page - Texas Instruments

tên linh kiện LM3532
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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LM3532 bảng dữ liệu(HTML) 16 Page - Texas Instruments

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Ambient Light (lux)
VALS_REF = 2V
Zone
Boundary 3_
Zone
Boundary 0_
Zone
Boundary 1_
Zone
Boundary 2_
Zone 0
Zone 4
Zone 3
Zone 2
Zone 1
LED Driver Input Code (0x00 - 0xFF)
Full
Scale
Zone
Target 4
Zone
Target 3
Zone
Target 2
Zone
Target 1
Zone
Target 0
LM3532
SNVS653E – JULY 2011 – REVISED AUGUST 2015
www.ti.com
Figure 14. Ambient Light Input to Backlight Mapping
7.4.10.3 Ambient Light Zone Hysteresis
For each Zone Boundary there are two Zone Boundary Registers: a Zone Boundary High Register and a Zone
Boundary Low Register. The difference between the Zone Boundary High and Zone Boundary Low Register set
points (for a specific zone) creates the hysteresis that is required to transition between two adjacent zones. This
hysteresis prevents the backlight current from oscillating between zones when the ALS voltage is close to a Zone
Boundary Threshold. Figure 15 describes this Zone Boundary Hysteresis. The arrows indicate the direction of the
ALS input voltage. The black dots indicate the threshold used when transitioning to a new zone.
16
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