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SC615

Part Number	SC615
Manufacturer	Semtech Corporation
Description	Charge Pump Flash LED Driver
Published	Jan 20, 2006
Detailed Description	e charge pump designed speThe SC615 is a high-current e cifically for use with h white LEDs used in camera flash S appli...
Datasheet	SC615 PDF File

Overview

e charge pump designed speThe SC615 is a high-current e cifically for use with h 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 SC615 has two modes of operation: Flash mode w and Spotlight mode.
The SC615 is capable of delivering w 500mA of peak current for a duration of 500ms in Flash mode.
In Spotlight mode the SC615 outputs 100mA and can remain enabled continuously.
A minimum 0.
5Ω sense resistor is used to set the current through the LED in both modes.
This resistor dissipates up to 0.
125W, reducing the power dissipation requirement of the SC615.
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 help make the SC615 a high output current driver that requires a minimal amount of PCB area.
POWER MANAGEMENT Description U 4 t m o .
c Features Charge Pump Flash LED Driver 500mA Output Current - Flash Mode 3.
0V to 5.
25V Input Range Two Selectable Modes - Flash and Spotlight External Flash Control Pin for Synchronization to a Camera Module or Graphics Controller Spotlight Mode Current Setting - 100mA Short Circuit, Over-Voltage, and Over-Temperature Protection Soft-Start Functionality Two Control Inputs for Maximum Versatility Shutdown Current < 2µA Micro Lead-frame Package MLPD-10, 3mm x 3mm SC615 Applications Application Circuit 3.
0V to 5.
25V w 10µF w .
D w 1µF 1µF t a 1 8 4 VIN C1+ C1C2+ C2- S a SC615 e h VOUT GND ISET CTRL 9 Mobile Camera Phones Digital Cameras PDAs with Built-in Cameras Multi-LED Backlit LCDs t e U 4 .
c m o white LED 3 6 7 5 1µF 10 2 FLASH 0.
5Ω FLASH CTRL July 11, 2005 1 w w w .
D a S a t e e h U 4 t m o .
c www.
semtech.
com SC615 POWER MANAGEMENT Absolute Maximum Ratings Exceeding...

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