Complete PWM Power Control Circuitry
Input Voltage Range: 1.6V to 5.5V
Independent On/Off Control for CH1 to CH4
Internal Soft-Start for All Channels
True Shutdown for CH2
Internal Compensation for all Channels.
Overload Protection
Operation Frequency up to 2MHz
LED Driver with PWM Dimming Control up to 4 WLEDs
Compact 32-Pin 4 x 4 Thin QFN Package
Built-in V2I Regulator
General Description
The AAT7653 provides an integrated 5-channel pulse-width-modulation (PWM) solution and a V2I regulator for the power supply of DC-DC converter. This device improves performance and size compared to conventional controllers in battery supply design. The AAT7653 has four current mode PWM converters. The four current-mode channel has on-chip synchronous power FETs. The six channels include:
CH1: Boost DC-DC converter.
CH2: Boost / buck selectable DC-DC converter
CH3: Buck DC-DC converter.
CH4: Buck DC-DC converter.
CH5: HV boost DC-DC converter with internal power FET for the white LEDs.
CH6: V2I regulator for high brightness LEDs.
Digital Still Cameras
Digital Videos
Mini Projector
Portable Devices