AAT7650A中文资料7-CHANNEL DIGITAL STILL CAMERA POWER SUPPLY WITH LDO数据手册AAT规格书

描述 Description

\tThe AAT7650A provides an integrated 7-channel pulse-width-modulation (PWM) power solution and a low noise LDO for the power supply of a DC-DC converter. This device improves performance and size compared to conventional controllers in battery design. The AAT7650A has six current-mode PWM converters and one voltage-mode PWM converter. Each current-mode channel has on-chip synchronous power FETs. The seven channels include:


\tCH1: Boost DC-DC converter.


\tCH2: Boost / Buck selectable DC-DC converter.


\tCH3: Buck DC-DC converter.


\tCH4: Buck DC-DC converter.


\tCH5: HV Boost DC-DC converter with internal power FET for the CCD positive bias.


\tCH6: Inverting DC-DC converter for the CCD negative bias.


\tCH7: HV Boost DC-DC converter with internal power FET for the white LEDs.

特性 Features

• Complete PWM Power Control Circuitry
• Input Voltage Range: 1.6V to 5.5V
• Low Start-Up Voltage: 1.6V
• Independent On/Off Control for CH5, 6, 7
• Internal Soft-Start for All Channels
• True Shutdown for CH2
• Internal Compensation for CH3 and CH4
• Provide Negative Voltage to Enhance PMOS Gate Driving Capability
• Overload Protection
• Fixed 1MHz Switching Frequency
• Load Disconnect PMOS for CH5
• Compact 40-Pin 5 x 5 Thin QFN Package

应用 Application

• Digital Still CamerasDigital VideosDigital Photo FramesPDAsPortable Devices