ISL97649AR5566 Datasheet, PDF (1/21 Pages) Intersil Corporation – TFT-LCD Supply + DCP + VCOM Amplifier + Gate Pulse Modulator + RESET

DATASHEET
TFT-LCD Supply + DCP + VCOM Amplifier + Gate Pulse
Modulator + RESET
ISL97649AR5566
The ISL97649AR5566 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 ISL97649AR5566
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, 0.18Ω integrated boost FET
• 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
VIN
C1, 2
20µF
VIN
C32
0.1µF
VLOGIC
VLOGIC
LDO VIN
C25
1µF
C24
2.2µF
R18
3.92k
R17
8.25k
AVDD
C19
0.47µF
R9
10k
133k
R8
R7
83k
VCOM
September 11, 2015
1
FN8774.0
VIN
EN
SS
FREQ SEQUENCER
L_IN
AVDD BOOST
CONTROLLER
L1 10µH
LX
PGND
D1 C4, 5, 6
30µF
SW
R1
73.2k
AVDD
C7 _AVDD
0.1µF
FB
COMP
R2 8.06k
R12 5.5k C20 15nF
D4
Q1
VOFF
L_OUT
ADJ
SCL
SDA
RSET
POS
AVDD
OUT
NEG
LDO
DCP
GPM
VCOM OP
VOLTAGE
DETECTOR
THERMAL PAD
VFLK
VGH
VDPM
CE
RE
VGHM
GPM_LO
VDIV
CD2
RESET
C11
0.1µF
AVDD
C15
1µF
C8
47nF
D2 C₉
1µF
R6 1k
Z1
SW
C10
47nF
D3
C16
1µF
VON
C12
1µF
C17 1nF
C14 100pF
C28
0.1µF
R5 100k
C18
0.47µF
R14 85k
VGH GPM
R22 22k
R26 100k
VIN
OPEN
R15 115k
C26 1nF
RESET
AVDD
VGH
R16
10k
VLOGIC
FIGURE 1. APPLICATION DIAGRAM
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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