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TPS65123

Texas Instruments
Part Number TPS65123
Manufacturer Texas Instruments
Description SINGLE-INDUCTOR QUADRUPLE-OUTPUT TFT LCD POWER SUPPLY
Published Sep 29, 2019
Detailed Description www.ti.com TPS65120, TPS65121, TPS65123, TPS65124 SLVS531A – JUNE 2004 – REVISED MARCH 2005 SINGLE-INDUCTOR QUADRUPLE-O...
Datasheet PDF File TPS65123 PDF File

TPS65123
TPS65123

Overview
www.
ti.
com TPS65120, TPS65121, TPS65123, TPS65124 SLVS531A – JUNE 2004 – REVISED MARCH 2005 SINGLE-INDUCTOR QUADRUPLE-OUTPUT TFT LCD POWER SUPPLY FEATURES • Main Output, VMAIN – Adjustable Voltage, 3.
0 V to 5.
6 V/25 mA – Post-Regulated for Low Ripple (5mVPP) – ±0.
8% Typical Accuracy – Efficiency up to 83% • Positive Output, VGH – Adjustable Voltage up to 20 V/2 mA – ±3% Typical Accuracy • Negative Output, VGL – Adjustable Voltage down to -18 V/2 mA – ±3% Typical Accuracy • Auxiliary 1.
8 V/3.
3 V Linear Regulator • Automatic or Programmable Power Sequencing • Complete 1 mm Component Profile Solution • 2.
5 V to 5.
5 V Input Voltage Range • Output Short Circuit Protected • 16-Pin QFN Package (3 × 3 × 0,9 mm) APPLICATIONS • Small Form Factor a-Si and LTPS TFT LCD • Cell Phones, Smart Phones • PDAs, Pocket PCs • Portable DVD • Digital-Still Cameras, Camcorders • Handheld Instruments • Portable GPS • Car Navigation Systems DESCRIPTION The TPS6512x DC-DC converter supplies all three voltages required by amorphous-silicon (a-Si) and low-temperature poly-silicon (LTPS) TFT-LCD displays.
The compact layout of the TPS6512x uses a single inductor to generate independently-regulated positive and negative outputs.
A free-running variable peak current PWM control scheme time-multiplexes the inductor between outputs.
This control architecture operates at a pseudo-fixed-frequency to provide fast response to line and load transients while maintaining a relatively constant switching frequency and high efficiency over a wide range of input and output voltages.
Due to the high switching frequency capability of the device, inexpensive and ultra-thin 8.
2 or 10 µH inductors can be used.
The main output, VMAIN, is post-regulated to provide a low-ripple source drive voltage for the LCD display.
The auxiliary outputs generate a boosted output voltage, VGH, up to 20 V, and a negative output voltage, VGL, down to -18 V for the LCD gate drive.
The device has internal current limiting for high ...


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