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SC615A

Semtech Corporation
Part Number SC615A
Manufacturer Semtech Corporation
Description Charge Pump Flash LED Driver
Published Jan 20, 2006
Detailed Description m o c POWER MANAGEMENT . U 4 Description t e The SC615A is a high-current charge pump designed spee h cifically for use ...
Datasheet PDF File SC615A PDF File

SC615A
SC615A

Overview
m o c POWER MANAGEMENT .
U 4 Description t e The SC615A is a high-current charge pump designed spee h cifically for use with white LEDs used in camera flash S applications.
Only two small bucket capacitors are rea t quired to develop the output drive, providing a low EMI a to inductive boost regulators.
solution compared D .
w The SC615A has two modes of operation: Flash mode w and w Spotlight mode.
In Flash mode, the SC615A is capable of delivering 500mA of regulated current for a duration of 500ms or up to 700mA for a reduced duration.
In Spotlight mode the SC615A outputs 40% of the Flash mode current and can remain enabled continuously.
An external resistor is connected in series with the LED to set the current.
In Flash mode, this resistor can dissipate up to 175mW, reducing the power dissipation requirement of the SC615A.
The flash input (FLASH) overrides the control input (CTRL) to make sure the flash function is activated when called for.
The thermally efficient MLPD-10 package and ceramic bypass and bucket capacitors make the SC615A a high output current driver that requires minimal PCB area.
Charge Pump Flash LED Driver Features ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ Two Selectable Modes - Flash and Spotlight Up to 700mA Output - Flash Mode Up to 280mA Output - Spotlight Mode 500mA Over Temperature Range and Voltage Range - Flash Mode Spotlight mode set to 40% of Flash Current 3.
0V to 5.
25V Input Range External Flash Control Pin for Synchronization to a Camera Module or Graphics Controller Short Circuit, Over-Voltage, and Over-Temperature Protection Soft-Start Functionality Two Control Inputs for Maximum Versatility Shutdown Current < 2µA Micro Lead Package MLPD-10, 3mm x 3mm SC615A Typical Application Circuit 3.
0V to 5.
25V m o .
c U 4 t e e h S a t a .
D w w w ‹ ‹ ‹ ‹ Applications ‹ Mobile Camera Phones ‹ Digital Cameras ‹ PDAs with Built-in Cameras 1 8 4 SC615A VIN VOUT GND 9 10µF white LED C1+ C1- 3 6 1µF 1µF C1 ISET 10 C2+ C2- CTRL 7 1µF C2 2 FLASH ...


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