Description: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, VON and VOFF charge pump drivers, one synchronous buck regulator, and one synchronous buck controller for two logic voltages. The VON slicing 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
Renesas provides a recommended PCB layout guide in their application note AN1995, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure optimal performance.
The selection of input and output capacitors depends on the specific requirements of your application, such as ripple current, voltage rating, and ESR. Renesas provides guidelines for capacitor selection in their application note AN1994, which includes a capacitor selection table and calculation formulas.
While the datasheet specifies an operating temperature range of -40°C to 125°C, Renesas recommends derating the device's performance at high temperatures to ensure reliable operation. A maximum ambient temperature range of 105°C is recommended for most applications.
The ISL98602IRAAZ-T has built-in OCP and SCP features, but they require external resistors and capacitors to set the threshold and response time. Renesas provides a detailed design guide in their application note AN1996, which includes calculation formulas and component selection guidelines.
Renesas recommends a specific startup sequence to ensure proper device operation and prevent damage. The recommended sequence is: 1) Power on the input voltage, 2) Wait for the internal voltage regulator to stabilize, and 3) Apply the enable signal (EN) to the device.
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ISL98602IRAAZ-T Overview
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