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TPS65167_07

更新时间： 2024-11-16 04:48:43
品牌 Logo 应用领域
德州仪器 - TI 电视
页数 文件大小 规格书
39页 1347K
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Compact LCD Bias Supply for TFT-LCD TV Panels

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TPS65167_07 数据手册

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TPS65167  
TPS65167A  
www.ti.com  
SLVS760B–APRIL 2007–REVISED OCTOBER 2007  
Compact LCD Bias Supply for TFT-LCD TV Panels  
1
FEATURES  
APPLICATIONS  
•
LCD TV Panel  
2
•
6 V to 14 V Input Voltage Range  
•
LCD Monitor  
•
•
•
•
Vs Output Voltage Range up to 19 V  
Boost Converter With 3.5-A Switch Current  
Boost Converter Overvoltage Protection  
DESCRIPTION  
The TPS65167 offers a compact power supply  
solution to provide all voltages required by a LCD  
panel for large size monitor and TV panel  
applications running from a 12-V supply rail.  
2.5-A Step-Down Converter With 3.3-V Fixed or  
Adjustable Output  
•
•
•
•
•
•
•
750 kHz Fixed Switching Frequency  
150 mA Negative Charge Pump Driver for VGL  
50 mA Positive Charge Pump for VGH  
LDO Controller for Logic Supply  
Gate Voltage Shaping for VGH  
The device generates all 3 voltage rails for the TFT  
LCD bias (Vs, VGL and VGH). In addition to that it  
includes a step-down converter and a LDO controller  
to provide two logic voltage rails. The device  
incorporates a high voltage switch that can be  
controlled by a logic signal from the external timing  
controller (TCON). This function allows gate voltage  
shaping for VGH. The device also features a high  
voltage stress test where the output voltage of VGH  
is set to typically 30 V and the output voltage of Vs is  
programmable to any higher voltage. The high  
voltage stress test is enabled by pulling the HVS pin  
high. The device consists of a boost converter to  
provide the source voltage Vs operating at a fixed  
switching frequency of 750 kHz. A fully integrated  
positive charge pump, switching automatically  
between doubler and tripler mode provides an  
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  
operate at a fixed switching frequency of 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.  
Temperature Sensor Output  
TPS65167 - High Voltage Stress Test Vs  
and VGH  
•
•
•
•
•
•
•
TPS65167A - High Voltage Stress Test Vs only  
Adjustable Sequencing  
Gate Drive Signal for Isolation Switch  
Short-Circuit Protection  
Internal Soft-start  
Thermal Shutdown  
Available in 6 × 6 mm 40 Pin QFN Package  
TPS65167  
Boost Converter  
High-Voltage Stress Test  
Vs  
15 V/1.7 A  
12 V  
Positive Charge Pump  
Gate Voltage Shaping  
VGH  
30 V/50 mA  
VGL  
–5 V/150 mA  
Negative Charge Pump  
Vtemp  
Temperature Sensor  
Buck Converter  
Vlogic  
3.3 V/2.5 A  
Vaux  
1.8 V/500 mA  
LDO Controller  
1
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.  
2
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 © 2007, Texas Instruments Incorporated  
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