FN7928 Rev 3.00

Page 1 of 22

June 27, 2013

FN7928

Rev 3.00

June 27, 2013

ISL97649A

TFT-LCD Supply + DCP + VCOM Amplifier + Gate Pulse Modulator + RESET

DATASHEET

The ISL97649A is an integrated power management IC (PMIC) for

TFT-LCDs used in notebooks, tablet PCs, and monitors. The device

VLOGIC. VON and VOFF are generated by a charge pump driven by

slice circuit, reset function, and a high performance VCOM

amplifier with DCP (Digitally Controlled Potentiometer) that is

used as a VCOM calibrator.

600/1200kHz switching frequency.

The 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.

amplifier is also integrated in the chip. The output of the VCOM is

powered up with the voltage at the last programmed 8-bit

EEPROM setting.

Features

• 2.5V to 5.5V input

•1.5A, 0.18Ω integrated boost FET

boost switch node

• LDO for VLOGIC channel

• 600/1200kHz selectable switching frequency

• Integrated gate pulse modulator

• Reset signal generated by supply monitor

• Integrated VCOM amplifier

•DCP

- 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

Applications

• LCD notebook, tablet, and monitor

Pin Configuration

ISL97649A

(28 LD 4x5 QFN)

TOP VIEW

FB

PGND

CE

RE

VGH

VGHM

VFLK

L_IN

CD2

L_OUT

RESET

ADJ

VDIV

NEG

1

2

3

4

5

6

7

22

21

20

19

18

17

16

28

27

26

25

24

23

9

101112

13

14

VDPM

8

VOUT

15

GND

THERMAL

PAD

NOT RECOMMENDE

D FOR NEW DESIGN

S

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