ISL97649B
TFT-LCD Supply + DCP + VCOM Amplifier + Gate Pulse Modulator + RESET
Key Features
- 2.5V to 5.5V Input
- 1.5A Integrated Boost for Up to 15V AVDD
- VON /VOFF Supplies Generated by Charge Pumps Driven by Boost Switch Node
- 600/1200kHz Selectable Switching Frequency
- Integrated Gate Pulse Modulator
- Reset Signal Generated by Supply Monitor
- Integrated VCOM Amplifier
- DCP
- I2C Serial Interface, address:100111, MSB Left
- Wiper Position Stored in 8-bit Nonvolatile Memory and Recalled on
Power-up - Endurance, 1,000 Data Changes Per Bit
- UVLO, UVP, OVP, OCP, and OTP Protection
- Pb-Free (RoHS Compliant)
- 28 Ld 4X5 QFN
Description
The ISL97649B is an integrated power management IC (PMIC) for TFT-LCDs used in notebooks, tablet PCs, and monitors. The device integrates a boost converter for generating AVDD. VON and VOFF are generated by a charge pump driven by the switching node of the boost. The ISL97649B also includes a VON slice circuit, reset function, and a high performance VCOM amplifier with DCP (Digitally Controlled Potentiometer) that is used as a VCOM calibrator.
The AVDD boost converter features a 1.5A /0.18Ω boost FET with 600/1200kHz switching frequency. The gate pulse modulator can control gate voltage up to 30V, and both the rate and slew delay time are selectable. The supply monitor generates a reset signal when the system is powered down.
The ISL97649B provides a programmable VCOM with I2C interface. One VCOM amplifier is also integrated in the chip. The output of VCOM is power-up with voltage at the last programmed 8-bit EEPROM setting.
Applications
- LCD Notebook, Tablet, and Monitor
