TPS65150 Datasheet, PDF (1/28 Pages) Texas Instruments – Low Input Voltage, Compact LCD Bias IC With VCOM Buffer

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Actual Size
6,4 mm x 7,8 mm
Actual Size
4 mm x 4 mm
TPS65150
SLVS576 – SEPTEMBER 2005
Low Input Voltage, Compact LCD Bias IC With VCOM Buffer
FEATURES
• 1.8-V to 6-V Input Voltage Range
• Integrated VCOM Buffer
• High Voltage Switch to Isolate VGH
• Gate Voltage Shaping of VGH
• 2-A Internal MOSFET Switch
• Main Output Vs up to 15 V With <1% Output
Voltage Accuracy
• Virtual Synchronous Converter Technology
• Negative Regulated Charge Pump Driver VGL
• Positive Regulated Charge Pump Driver VGH
• Adjustable Power On Sequencing
• Adjustable Fault Detection Timing
• Gate Drive Signal for external isolation
MOSFET
• Thermal Shutdown
• Available in TSSOP-24 Package
• Available in QFN-24 Package
APPLICATIONS
• TFT LCD Displays for Notebooks
• TFT LCD Display for Monitor
• Car Navigation Display
DESCRIPTION
The TPS65150 offers a very compact and small
power supply solution that provides all three voltages
required by thin film transistor (TFT) LCD displays.
With an input voltage range of 1.8 V to 6.0 V the
device is ideal for notebooks powered by a 2.5-V or
3.3-V input rail or monitor applications with a 5-V
input voltage rail. Additionally the TPS65150 provides
an integrated high current buffer to provide the
VCOM voltage for the TFT backplane.
Two regulated adjustable charge pump driver provide
the positive VGH and negative VGL bias voltages for
the TFT. The device incorporates adjustable power
on sequencing for VGL as well as for VGH. This
avoids any additional external components to
implement application specific sequencing. The
device has an integrated high voltage switch to
isolate VGH.
TYPICAL APPLICATION
R8
500 kW
R7
500 kW
Vin
5V
VGL
−5 V/20 mA
C3
0.33 mF
C8
220 nF
C6 1 nF
L1
3.9 mH
D1
V_S
13.5 V/450 mA
C1
22 mF
C7
D2
0.33 mF
R3
620 kW _D3
R4
150 kW
IN VIN
DRVN
SW SW
SUP
FBN
FB
REF
GND
PGND
TPS65150
DRVP
FBP
CPI
PGND
VGH
C14 ^D4
1 mF
C16 _D5
0.33 mF
CPI
C15
22 pF
R1
820 kW
R2
75 kW
C2
22 mF
C4
0.33 mF
CPI
R5
1 MW
VGH
Control Signal
C9
2.2 nF
CTRL
COMP
VCOM
GD
C10 C11 C12
22 pF 10 nF 10 nF
C13
100 nF
V_IN
VGH
23 V/20 mA
V_COM
Output
C5
1 mF
R6
56 kW
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPad is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005, Texas Instruments Incorporated