SC615A
SC615A is Charge Pump Flash LED Driver manufactured by SEMTECH.
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 pared 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 500m A of regulated current for a duration of 500ms or up to 700m A 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 175m W, 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 700m A Output
- Flash Mode Up to 280m A Output
- Spotlight Mode 500m A 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
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
VOUT GND
10µF white LED
C1+ C1-
3 6
1µF
1µF
C1
ISET
C2+ C2-
CTRL
1µF
C2
FLASH
FLASH CTRL
September 22,...
