Datasheet Texas Instruments LM3642TLX/NOPB — 数据表

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SNVS891H – SEPTEMBER 2012 – REVISED SEPTEMBER 2015 LM3642 1.5-A Synchronous Boost LED Flash Driver With High-Side Current Source
1 Features 3 Description The LM3642 is a 4-MHz fixed-frequency synchronous
boost converter plus 1.5-A constant current driver for
a high-current white LED. The high-side current
source allows for grounded cathode LED operation
providing Flash current up to 1.5 A. An adaptive
regulation method ensures the current source
remains in regulation and maximizes efficiency. 1 1.5-A High-Side Current Source for Single LED
> 85% Efficiency in Torch Mode (at 100 mA) and
Flash Mode (at 1 A to 1.5 A)
Accurate Programmable Flash LED Current from
93 mA to 1.5 A
Accurate Programmable Torch LED Currents:
– 48.4 mA to 375 mA
– 24 mA to 187 mA (LT option)
Small Solution Size: < 20 mm2
Soft-Start Operation for Battery Protection …