Light Management Unit With 4 LDOs And SemPulse® Interface

The SC643 is a high ei ciency Charge Pump LED Driver using Semtech’s proprietary Charge Pump technology. Performance is optimized for use in single cell Li-ion battery applications. Display backlighting is provided through i ve matched current sinks with integrated fade-in and fade-out con- trols. The LEDs CAN be driven as a single set or as two dif erent sets (for main and sub displays) with indepen- dent controls. Four low noise, low dropout (LDO) Regulators are provided to supply power for camera module I/O and other peripheral circuits. An external enable pin is also provided for one LDO for added l exibility. The SC643 uses the proprietary SemPulse® single wire Interface This Interface controls all functions of the device, including backlight currents and LDO voltage outputs. The single wire Interface minimizes Microcontroller and Interface pin counts. The SC643 enters sleep mode when all the LED Drivers are disabled. In this mode, the quiescent current is reduced while the device continues to monitor the SemPulse inter- face. Any combination of LDOs may be enabled when in sleep mode. By Semtech Corporation
SC643 's PackagesSC643 's pdf datasheet
SC643ULTRT




SC643 Pinout, Pinouts
SC643 pinout,Pin out
This is one package pinout of SC643,If you need more pinouts please download SC643's pdf datasheet.

SC643 Application circuits
SC643 circuits
This is one application circuit of SC643,If you need more circuits,please download SC643's pdf datasheet.


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