ISL78419ARZ集成电路（IC）的电源管理-专用规格书PDF中文资料

The ISL78419 is an integrated power management IC (PMIC) for

TFT-LCDs used in central display, rear seat entertainment and

virtual dashboards. The device integrates a boost converter for

generating AVDD, an LDO regulator for VLOGIC. VON and VOFF are

generated by a charge pump driven by the switch node of the

boost converter. The ISL78419 also includes a VON slice circuit,

reset function, and a high performance VCOM amplifier with a

Digitally Controlled Potentiometer (DCP) that is used as a VCOM

calibrator.

The AVDD boost converter features a 1.5A/0.18Ω boost FET with

600kHz/1200kHz switching frequency.

The integrated logic LDO includes a 350mA FET for driving the low

voltage needed by external digital circuitry.

The gate pulse modulator can control the gate voltage up to 30V,

and both the rate and slew delay times are selectable.

The supply monitor generates a reset signal when the system is

powered down based on a user selected threshold level

(programming resistor).

The ISL78419 provides a digitally controlled VCOM output using

I

2C interface. One VCOM amplifier is also integrated in the chip to

provide a fast slewing 150mA drive (sourcing or sinking). The

output of the VCOM is powered up with the voltage stored at the

last programmed 8-bit (internal) EEPROM setting.

The ISL78419 is rated to operate over the temperature range

of (-40°C to +105°C) and is qualified according to AEC-Q100.

特性 Features

• 2.5V to 5.5V input

• 1.5A, 0.18Ω integrated boost FET

• VON/VOFF supplies generated by charge pumps driven by the

boost switch node

• LDO for VLOGIC channel

• 600kHz/1200kHz selectable switching frequency

• Integrated gate pulse modulator

• Reset signal generated by supply monitor

• Integrated VCOM amplifier

• DCP

- I2C serial interface, address: 0101000, 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

• AEC-Q100 qualified

Applications

• Automotive TFT displays

- Central displays, rear seat entertainment and dashboards