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TPS65141PWP Datasheet(PDF) 1 Page - Texas Instruments |
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TPS65141PWP Datasheet(HTML) 1 Page - Texas Instruments |
1 / 32 page Vin V 1 U O p to 15 V / 400 mA V 3 U O p to 30 V / 20 mA V 2 U O p to 12 V / 20 mA V 4 3.3 O V PG Boost Converter Positive Charge Pump Negative Charge Pump Power Good Linear Regulator Controller TPS6514x 2.7 V to 5.8 V 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 The TPS6514x series offers a compact and small • 1.6-MHz Fixed Switching Frequency power supply solution to provide all three voltages • 3 Independent Adjustable Outputs required by thin film transistor (TFT) LCD displays. The auxiliary linear regulator controller can be used • Main Output up to 15 V With <1% Typical to generate a 3.3-V logic power rail for systems Output Voltage Accuracy powered by a 5-V supply rail only. • Virtual Synchronous Converter Technology The main output VO1 is a 1.6-MHz fixed frequency • Negative Regulated Charge Pump Driver VO2 PWM boost converter providing the source drive • Positive Charge Pump Converter VO3 voltage for the LCD display. The device is available in • Auxiliary 3.3-V Linear Regulator Controller two versions with different internal switch current limits to allow the use of a smaller external inductor • Internal Soft Start when lower output power is required. The • Internal Power-On Sequencing TPS65140/41 has a typical switch current limit of 2.3 • Fault Detection of all Outputs (TPS65140/45) A and the TPS65145 has a typical switch current limit of 1.37 A. A fully integrated adjustable charge pump • No Fault Detection (TPS65141) doubler/tripler provides the positive LCD gate drive • Thermal Shutdown voltage. An externally adjustable negative charge • System Power Good pump provides the negative gate drive voltage. Due to the high 1.6-MHz switching frequency of the • Available in TSSOP-24 and QFN-24 charge pumps, inexpensive and small 220-nF PowerPAD™ Packages capacitors can be used. APPLICATIONS Additionally, the TPS6514x series has a system power good output to indicate when all supply rails • TFT LCD Displays for Notebooks are acceptable. For LCD panels powered by 5 V the • TFT LCD Displays for Monitors device has a linear regulator controller using an • Portable DVD Players external transistor to provide a regulated 3.3 V output for the digital circuits. For maximum safety, the • Tablet PCs TPS65140/45 goes into shutdown as soon as one of • Car Navigation Systems the outputs is out of regulation. The device can be • Industrial Displays 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. 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. Copyright © 2003–2012, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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