资 源 简 介
EL7520 and EL7520A are 4-channel DC/DC controllers thatprovide a complete power supply system for TFT-LCDapplicaTIons. They consist of a 1MHz PWM boost controller,which generates the main voltage for the column driver, andthree LDO controllers for VON, VOFF, and VLOGIC supplies.They also include integrated start-up sequence and start-updelay control.EL7520 and EL7520A operate from 3V to 5.5V. The boostcontroller can drive a wide range of output currentdepending on the external FET. It can be programmed tooperate in either P-mode for fast transient response or PImodefor improved load regulaTIon. The EL7520 andEL7520A also integrate fault protecTIon for all four outputchannels. When a fault is detected, the device is latched offunTIl either the input supply voltage or enable is cycled.Therefore, they are ideal to use in any size of TFT-LCDpanels.The EL7520 and EL7520A are available in a 20 Ld 4x4 QFNpackage with maximum height of 0.9mm and is specified foroperation of the -40°C to +85°C temperature range.
