ISL97649B Datasheet, PDF (1/19 Pages) Intersil Corporation – TFT-LCD Supply + DCP + VCOM Amplifier + Gate Pulse Modulator + RESET

TFT-LCD Supply + DCP + VCOM Amplifier + Gate Pulse
Modulator + RESET
ISL97649B
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 A_VDD. V_ON
and V_OFF are generated by a charge pump driven by the
switching node of the boost. The ISL97649B 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 A_VDD 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.
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
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
Applications
• LCD Notebook, Tablet, and Monitor
Pin Configuration
ISL97649B
(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 NC
21 CD2
20 NC
19 RESET
18 NC
17 VDIV
16 NEG
15 VOUT
9 10 11 12 13 14
December 5, 2011
1
FN7927.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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