ELM900 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – WHITE LED FLASHLIGHT DRIVER

㪜㪣㪤㪐㪇㪇㫏 WHITE LED FLASHLIGHT DRIVER
䂓GENERAL DESCRIPTION
ELM900x is a CMOS IC designed for driving white LEDs by one or two dry cell as a power source. ELM900x
can drive two series white LED by 1.5V-3.0V input voltage. ELM900x uses an external inductor as a voltage
booster. ELM900x consists of an oscillator circuit and a driving transistor. The input DC power is transformed
to a 35kHz constant current pulse, when the external inductor switched on and off in 35kHz. In a standard
application inductor is needed as external parts.
䂓 FEATURES
䊶Low cost and simple application circuit
䊶High efficiency
䊶Constant average power control
䊶Low noise 35kHz constant frequency switching
䊶Compact SOT-89 package
䂓 APPLICATION
䊶White LED flashlight
䊶Laser pointer
䊶High VF LED driver
䊶LCD backlighting
䂓 PIN CONFIGURATION
SOT-89
㪈
㪉
㪊
( TOP VIEW )
䂓 MARKING
㪪㪦㪫㪄㪏㪐
㽲㽳
ã½´ã½µ
Pin No. Pin Name
1
VSS
2
VDD
3
LX
㽲 㪃 㽳 : Represents the product IC code
90
ã½´ : Represents the assembly lot number
0 䌾 9 repeated
ã½µ : Represents the assembly lot number
A 䌾 Z repeated ( I,O,X excepted )
䂓 MARKING
Symbol
                㩷㩷㪘㩷㪑 㪪㫅㪆㪧㪹㩷㫇㪸㪺㫂㪸㪾㪼            './Z
㫏 㪧㫉㫆㪻㫌㪺㫋㩷㪭㪼㫉㫊㫀㫆㫅 _{㩷㩷㪙㩷㪑 㪧㪹㩷㪄㩷㪝㫉㪼㪼㩷㫇㪸㪺㫂㪸㪾㪼}
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