ISL98602 Series

The ISL98602 represents a high-power, integrated LCD supply IC targeted at large panel LCD displays. The ISL98602 integrates a high-power boost converter for AVDD generation, VONand VOFFcharge pump drivers, one synchronous buck regulator, and one synchronous buck controller for two logic voltages. The VONslicing circuitry and power good function are also included. Operating at 1. 3MHz, the AVDD boost converter features a 5. 5A boost FET. Feedback is taken from the far side of the delay FET for improving regulation. The OVP circuit protects output side components. The logic synchronous buck converter features two 2. 3A FETs operating at 1. 3MHz internal clock. The output voltage is set by the IC internally or with a feedback resistor. The soft-start circuitry is also integrated with the buck. The second logic voltage is generated from a synchronous buck converter with MOSFET controllers. The overcurrent protection is also integrated with the buck. The charge pump of VONand VOFFuses the full switching frequency and integrates the driver for high current capability. VONis further processed through an integrated VONslice circuit in order to reduce flicker. Alternative fixed voltages at the boost, Buck1, Buck2, VONcharge pump, and VOFFcharge pump are available in ISL98602.