AAT1101 Datasheet | Advanced Analogic Technologies

Features .. General Description The AAT1101 series provide an integrated triple-channel pulse width modulation (PWM) solution for the power supply of LCD displays. These devices offer system engineers the flexibility to tailor-make the power supply circuitry for specific applications. Each channel contains its own error amplifier, PWM parator, dead- time control (DTC) and output driver. The under-voltage protection, over voltage protection, power sequence control, shutdown control circuit, oscillator, short circuit protection, and voltage reference circuits are the mon features of the three channels. The AAT1101 series contain two exclusive boost circuits at CH1, CH3 and an exclusive buck_boost circuit at CH2. AAT1101’s Power Up sequence initiates at CH1 then CH2 and finally CH3. AAT1101A/C’s Power Up sequence acts in the order of CH2, CH3, and then CH1. AAT1101B’s Power Up sequence starts At the pletion of from CH2, CH1, and then CH3. SHDN IE3 IE1 EO 1 PRDS CHC OVS (OSC) (NC) z z plete PWM Power Control Circuitry Precision Reference: 1.25V±1% (25 o C ) z z z Low Operating Voltage: 2.5V to 6.5V Under-Voltage Lockout Protection 5V or 3.3V Selectable Over Voltage Lockout Protection (AAT1101/A only) AAT1101/AAT1101A/AAT1101C: 500k Hz Fixed AAT1101B: 50k~1MHz Programmable z z z z Internal Power Up Sequence Control Totem Pole Output Output Short Circuit Protection Low Dissipation Current: 2.5m A (f=500k Hz, Duty=50%) Pin Configuration TOP VIEW IE2 PRDB 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 the Power Up sequencing, the SCP pin stays low and enters the Wait State of short circuit protection. Power Up sequencing delay and short circuit protection delay are set by connecting a capacitor to the SCP pin. Furthermore, these devices can operate with supply voltage ranging from 2.5V to 6.5V and function efficiently in an environment with low power supply. With a minimum number of external ponents, the AAT1101 series offer a simple and cost effective solution for TFT...