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TPS65141PWPRG4 PDF预览

TPS65141PWPRG4

更新时间： 2024-11-17 00:54:27
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德州仪器 - TI 输出元件
页数 文件大小 规格书
32页 1142K
描述
TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND POWER GOOD

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TPS65141PWPRG4 数据手册

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TPS65140, TPS65141  
TPS65145  
www.ti.com  
SLVS497E –SEPTEMBER 2003–REVISED NOVEMBER 2012  
TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND POWER GOOD  
Check for Samples: TPS65140, TPS65141, TPS65145  
1
FEATURES  
DESCRIPTION  
2
•
2.7-V to 5.8-V Input Voltage Range  
1.6-MHz Fixed Switching Frequency  
3 Independent Adjustable Outputs  
The TPS6514x series offers a compact and small  
power supply solution to provide all three voltages  
required by thin film transistor (TFT) LCD displays.  
The auxiliary linear regulator controller can be used  
to generate a 3.3-V logic power rail for systems  
powered by a 5-V supply rail only.  
•
•
•
Main Output up to 15 V With <1% Typical  
Output Voltage Accuracy  
•
•
•
•
•
•
•
•
•
•
•
Virtual Synchronous Converter Technology  
Negative Regulated Charge Pump Driver VO2  
Positive Charge Pump Converter VO3  
Auxiliary 3.3-V Linear Regulator Controller  
Internal Soft Start  
The main output VO1 is a 1.6-MHz fixed frequency  
PWM boost converter providing the source drive  
voltage for the LCD display. The device is available in  
two versions with different internal switch current  
limits to allow the use of a smaller external inductor  
when lower output power is required. The  
TPS65140/41 has a typical switch current limit of 2.3  
A and the TPS65145 has a typical switch current limit  
of 1.37 A. A fully integrated adjustable charge pump  
doubler/tripler provides the positive LCD gate drive  
voltage. An externally adjustable negative charge  
pump provides the negative gate drive voltage. Due  
to the high 1.6-MHz switching frequency of the  
charge pumps, inexpensive and small 220-nF  
capacitors can be used.  
Internal Power-On Sequencing  
Fault Detection of all Outputs (TPS65140/45)  
No Fault Detection (TPS65141)  
Thermal Shutdown  
System Power Good  
Available in TSSOP-24 and QFN-24  
PowerPAD™ Packages  
APPLICATIONS  
Additionally, the TPS6514x series has a system  
power good output to indicate when all supply rails  
are acceptable. For LCD panels powered by 5 V the  
device has a linear regulator controller using an  
external transistor to provide a regulated 3.3 V output  
for the digital circuits. For maximum safety, the  
TPS65140/45 goes into shutdown as soon as one of  
the outputs is out of regulation. The device can be  
enabled again by toggling the input or the enable  
(EN) pin to GND. The TPS65141 does not enter  
shutdown when one of its outputs is below its power  
good threshold.  
•
•
•
•
•
•
TFT LCD Displays for Notebooks  
TFT LCD Displays for Monitors  
Portable DVD Players  
Tablet PCs  
Car Navigation Systems  
Industrial Displays  
TPS6514x  
V 1  
O
Vin  
2.7 V to 5.8 V  
Boost  
Converter  
Up to 15 V / 400 mA  
V 3  
O
Positive Charge  
Pump  
Up to 30 V / 20 mA  
V 2  
O
Negative  
Charge Pump  
Up to 12 V / 20 mA  
Power Good  
PG  
Linear Regulator  
Controller  
V 4  
O
3.3 V  
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 © 2003–2012, Texas Instruments Incorporated  
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