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LM3532 Datasheet(PDF) 38 Page - Texas Instruments

Part # LM3532
Description  LM3532 High-Efficiency White LED Driver With Programmable Ambient Light Sensing Capability and I2C-Compatible Interface
PDF  52 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM3532 Datasheet(HTML) 38 Page - Texas Instruments

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LM3532
SNVS653E – JULY 2011 – REVISED AUGUST 2015
www.ti.com
8.2.2.4.2
Output Voltage Limited
When the LM3532 output voltage (highest voltage LED string + 400-mV headroom voltage) reaches 40 V, the
OVP threshold is hit, and the NFET turns off and remains off until the output voltage drops 1V below the OVP
threshold. Once VOUT falls below this hysteresis, the boost converter turns on again. In high output voltage
situations the LM3532 begins to regulate the output voltage to the VOVP level instead of the current sink
headroom voltage. This can result in a loss of headroom voltage across the feedback enabled current sinks
resulting in the LED current dropping below its programmed level.
38
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Product Folder Links: LM3532



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