SC628A Datasheet PDF | Semtech Corporation

Semtech Corporation SC628A

The SC628A is a high efficiency charge pump LED driver using Semtech’s proprietary charge pump technology. The load and supply conditions determine whether the charge pump operates in 1x, 1.5x, or 2x mode. The charge pump provides continuous spotlight mode current or pulsed flash mode current to an LED using a dedicated current sink.

Part No.	SC628A
Datasheet	SC628A Download
Manufacturer	Semtech Corporation
Description	LED Flash Driver Charge Pump
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FEATURES

Charge Pump with 1000mA Flash Mode, 275mA Spotlight Mode, and I2C Interface

DESCRIPTION

Performance is optimized for use in single-cell Li-ion battery applications. In flash mode, a flash-timeout feature turns off the flash if active for longer than 1 second. In spotlight mode, the timeout feature is disabled to allow continuous operation of the LED. The SC628A uses an I2C compatible serial interface to set the flash mode or the spotlight mode current. The flash/ spotlight output is triggered via either the I2C interface or a dedicated flash enable pin (FLEN). In sleep mode, the device reduces quiescent current to 100μA while continuing to monitor the serial interface. Total current reduces to 0.1μA in shutdown. Input supply voltage range — 3.0V to 5.5V Charge pump modes — 1x, 1.5x and 2x Flash LED — 1000mA max in flash mode, 275mA max continuous for spotlight Charge pump frequency — 250kHz I2C compatible interface — up to 400kHz External flash control pi...