TPS65167ARHAR ,4-CH LCD Bias w/ Fully Int. Positive Charge Pump, LDO Controller, HVS (VDD / VGH) & Temp. Sensor 40-VQFN -40 to 85features a highand VGHvoltage stress test where the output voltage of VGH• TPS65167A - High Voltage ..
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TPS65167A-TPS65167ARHAR
4-CH LCD Bias w/ Fully Int. Positive Charge Pump, LDO Controller, HVS (VDD / VGH) & Temp. Sensor
1FEATURES APPLICATIONS
DESCRIPTIONVtemp
Buck Converter
TPS65167
LDO Controller
Boost Converter
High-Voltage StressTest
Positive Charge Pump
Gate Voltage Shaping
Negative Charge Pump
Temperature Sensor
15 V/1.7A12 V
VGH
30 V/50 mA
VGL
–5 V/150 mA
Vlogic
3.3 V/2.5A
Vaux
1.8 V/500mA
TPS65167
TPS65167ASLVS760C–APRIL 2007–REVISED MARCH 2008
www.ti.com
Compact LCD Bias Supply for TFT-LCD TV Panels LCD TV Panel 6Vto14V Input Voltage Range LCD Monitor•
Vs Output Voltage Range upto19V Boost Converter With 3.5-A Switch Current Boost Converter Overvoltage ProtectionThe TPS65167 offersa compact power supply•
2.5-A Step-Down Converter With 3.3-V Fixedor solutionto provide all voltages required bya LCD
Adjustable Output panel for large size monitor and TV panel•
750 kHz Fixed Switching Frequency applications running froma 12-V supply rail.
150 mA Negative Charge Pump Driver for VGL The device generatesall3 voltage rails for the TFT•
50 mA Positive Charge Pump for VGH LCD bias (Vs, VGL and VGH).In additionto thatit
includesa step-down converter anda LDO controller•
LDO Controller for Logic Supply to provide two logic voltage rails. The device•
Gate Voltage Shaping for VGH incorporatesa high voltage switch that can be•
Temperature Sensor Output controlled bya logic signal from the external timing
controller (TCON). This function allows gate voltage•
TPS65167- High Voltage Stress Test Vsshaping for VGH. The device also featuresa high
and VGH voltage stress test where the output voltageof VGH•
TPS65167A- High Voltage Stress Test Vs only is setto typically30V and the output voltageof Vsis•
Adjustable Sequencing programmable to any higher voltage. The high
voltage stress testis enabledby pulling the HVS pin•
Gate Drive Signal for Isolation Switch high. The device consistsofa boost converterto•
Short-Circuit Protection provide the source voltage Vs operatingata fixed•
Internal Soft-start switching frequencyof 750 kHz.A fully integrated
positive charge pump, switching automatically•
Thermal Shutdownbetween doubler and tripler mode provides an•
Availablein6×
6 mm40 Pin QFN Package adjustable regulated TFT gate on voltage VGH.A
negative charge pump driver provides adjustable
regulated output voltages VGL. To minimize external
components the charge pumps for VGH and VGL
operateata fixed switching frequencyof 1.5 MHz.
The device includes safety features like overvoltage
protection of the boost converter, short-circuit
protection of VGH and VGL as well as thermal
shutdown.