TRIPLE-CHANNEL PWM CONTROLLER
Advanced Analog Technology, Inc.
AAT1100
Product information presented is current as of publication date. Details are su...
Description
Advanced Analog Technology, Inc.
AAT1100
Product information presented is current as of publication date. Details are subject to change without notice
TRIPLE-CHANNEL PWM CONTROLLER
Features
z z z z z z z z z z z Complete PWM Power Control Circuitry Precision Reference¡G 1.25V±1% (25 oC) Low Operating Voltage¡G 2.5V to 7.0V Under-Voltage Lockout Protection Totem Pole Output Output Short Circuit Protection Low Dissipation Current¡G 2.5mA at 500 kHz and 50% Duty Cycle Separate On / Off Control for CH1, CH3 Pair and CH2 (Refer to Function Table) Dead Time Control¡G 0 to 100% Wide Operating Frequency¡G 50 kHz to 1MHz Minimized External Components
General Description
The AAT1100 provides an integrated triple-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC system; this device offers system engineer the flexibility to custom-make the power supply circuitry to a specific application. Each channel contains its own error amplifier, PWM comparator, dead–time control (DTC) and output driver. The under-voltage protection, oscillator, short circuit protection and voltage reference circuit are common features of the three channels. The AAT1100 contains two boost circuits (CH1, CH3) and a buck-boost circuit (CH2). DTC can be set to provide 0% to 100% dead-time through a divider network. Soft-Start can be implemented by paralleling the DTC resistor with a capacitor. Two DTC inputs are assigned for CH1, CH3 pair and CH2 individually, and DTC inputs can be used to c...
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