The ISL97652 represents a high power, integrated LCD supply IC targeted at large panel LCD displays. The ISL97652 integrates a high power, boost converter for A_VDD generation, delay switch, regulated V_ON and V_OFF charge pumps, V_ON slicing circuitry, a buck regulator for logic supply generation and dual high power V_COM amplifiers.

Operating at 650kHz or 1.3MHz, the A_VDD boost converter features a 2.8A boost FET. A short circuit protected A_VDD delay switch is integrated to provide sequencing of the A_VDD output. Feedback is taken from the far side of the delay FET for improved regulation and an OVP circuit protects output side components. The boost features programmable soft-start.

The asynchronous buck converter features an integrated 2.5A FET. It also operates from the 650kHz or 1.3MHz internal clock and features separate enable and soft-start control.

The dual charge pump controllers used for V_ON and V_OFF generation uses the full F_OSC switching frequency to allow the use of small output components for board space efficiency. V_ON is further processed through an integrated V_ON-SLICE circuit for reduced flicker.

The integrated amplifiers feature high slew-rate and high output current capability. They are permanently enabled when AVIN is present.

Available in the 48 Ld 7mmx7mm QFN package, the ISL97652 is specified for ambient operation over the -40°C to +85°C temperature range.

• 8V to 15V input supply
• A_VDD boost up to 19.5V (OVP threshold), with integrated 2.8A_PEAK FET
• Overvoltage protection (OVP)
• 2A integrated A_VDD delay FET, with short circuit protection
• Dual charge pump controllers for V_ON and V_OFF
• V_LOGIC buck with integrated 2.5A_PEAK FET
• V_ON slicing
• Dual high speed V_COM amplifiers
• 650kHz/1.3MHz switching frequency
• Integrated sequencing
• UVLO and OTP protection
• Thermally enhanced 7x7 QFN package
• Pb-free (RoHS compliant)

• LCD-TVs (up to 40")
• Industrial/medical LCD displays