Datasheet > ISL78419

ISL78419

更新时间： 2023-12-20 18:45:17

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描述
Integrated Automotive TFT-LCD Power Supply Regulator

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ISL78419 数据手册

DATASHEET

ISL78419

FN8292

Rev 3.00

June 27, 2014

Integrated Automotive TFT-LCD Power Supply Regulator

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

Features

• 2.5V to 5.5V input

generating AV , an LDO regulator for V

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

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

reset function, and a high performance VCOM amplifier with a

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

calibrator.

. V and V are

• 1.5A, 0.18Ω integrated boost FET

• V /V supplies generated by charge pumps driven by the

DD LOGIC ON

OFF

ON OFF

boost switch node

• LDO for V channel

LOGIC

• 600kHz/1200kHz selectable switching frequency

• Integrated gate pulse modulator

• Reset signal generated by supply monitor

• Integrated VCOM amplifier

The AV 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.

• DCP

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

and both the rate and slew delay times are selectable.

- I C serial interface, address: 0101000, MSB left

- Wiper position stored in 8-bit nonvolatile memory and

recalled on power-up

The supply monitor generates a reset signal when the system is

powered down based on a user selected threshold level

(programming resistor).

- Endurance, 1,000 data changes per bit

• UVLO, UVP, OVP, OCP, and OTP protection

• Pb-free (RoHS compliant)

• 28 Ld 4x5 QFN

The ISL78419 provides a digitally controlled VCOM output using

I C 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.

• AEC-Q100 qualified

Applications

• Automotive TFT displays

The ISL78419 is rated to operate over the temperature range

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

- Central displays, rear seat entertainment and dashboards

Pin Configuration

ISL78419 (28 LD 4x5 QFN)

TOP VIEW

PGND

L_IN

CD2

L_OUT

RESET

ADJ

GND

THERMAL

PAD

VGH

VGHM

VFLK

VDPM

VDIV

NEG

VOUT

FN8292 Rev 3.00

June 27, 2014

Page 1 of 20

12 3 4 5 6 7...20

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