TPS65123RGT

单电感翻两番输出TFT LCD电源 SINGLE-INDUCTOR QUADRUPLE-OUTPUT TFT LCD POWER SUPPLY

DESCRIPON

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.

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