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SC615A

更新时间: 2024-11-18 03:33:23
品牌 Logo 应用领域
商升特 - SEMTECH 驱动器闪光灯
页数 文件大小 规格书
12页 207K
描述
Charge Pump Flash LED Driver

SC615A 数据手册

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SC615A  
Charge Pump  
Flash LED Driver  
POWER MANAGEMENT  
Description  
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  
The SC615A is a high-current charge pump designed spe-  
cifically for use with white LEDs used in camera flash  
applications. Only two small bucket capacitors are re-  
quired to develop the output drive, providing a low EMI  
solution compared to inductive boost regulators.  
‹ 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  
The SC615A has two modes of operation: Flash mode  
and Spotlight mode. In Flash mode, the SC615A is ca-  
pable of delivering 500mA of regulated current for a du-  
ration 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.  
‹ Micro Lead Package MLPD-10, 3mm x 3mm  
Applications  
‹ Mobile Camera Phones  
‹ Digital Cameras  
‹ PDAs with Built-in Cameras  
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.  
Typical Application Circuit  
SC615A  
1
8
9
VOUT  
VIN  
C1+  
C1-  
C2+  
C2-  
white LED  
10µF  
3.0V to 5.25V  
1µF  
3
GND  
1µF  
1µF  
C1  
C2  
4
6
ISET  
10  
2
7
CTRL  
0.5Ω  
5
FLASH  
FLASH  
CTRL  
September 22, 2005  
www.semtech.com  
1

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