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Documents LM3559
SNVS624B – JUNE 2011 – REVISED JUNE 2016 LM3559 Synchronous Boost Flash Driver With Dual 900-mA High-Side Current Sources
(1.8-A Total Flash Current)
1 Features 3 Description The LM3559 is a 2-MHz fixed-frequency synchronous
boost converter with two 900-mA constant current
drivers for high-current white LEDs. The dual highside current sources allow for grounded cathode LED
operation and can be tied together for providing flash
currents of up to 1.8 A. An adaptive regulation
method ensures the current for each LED remains in
regulation and maximizes efficiency. 1 Dual High-Side Current Sources Allow for
Grounded Cathode LED Operation
Accurate and Programmable LED Current from
28.125 mA to 1.8 A
Optimized Flash Current During Low Battery
Conditions
Independent LED Current Source Programmability
Four Operating Modes: Torch, Flash, Privacy
Indicate, and Message Indicator …
