ISL97649A Datasheet, PDF (1/20 Pages) Intersil Corporation – TFT-LCD Supply + DCP + VCOM Amplifier + Gate Pulse Modulator + RESET

TFT-LCD Supply + DCP + VCOM Amplifier + Gate Pulse
Modulator + RESET
ISL97649A
The ISL97649A 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 A_VDD, an LDO for
VLOGIC. VON and VOFF are generated by a charge pump driven by
the switch node of the boost. The ISL97649A also includes a V_ON
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 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.
It provides a programmable VCOM with I²C interface. One VCOM
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 Integrated Boost for up to 15V A_VDD
• V_ON/V_OFF Supplies Generated by Charge Pumps Driven By
the 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
- 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
Applications
• LCD Notebook, Tablet, and Monitor
Pin Configuration
ISL97649A
(28 LD 4x5 QFN)
TOP VIEW
28
FB 1
PGND 2
CE 3
RE 4
VGH 5
VGHM 6
VFLK 7
VDPM 8
27 26 25 24
GND
THERMAL
PAD
23
22 L_IN
21 CD2
20 L_OUT
19 RESET
18 ADJ
17 VDIV
16 NEG
15 VOUT
9 10 11 12 13 14
December 5, 2011
1
FN7928.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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