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Features
? Input Voltage Range: 2.5V ~ 5.5V
? Main Output, AVDD
—Adjustable Voltage
—Load current up to 40mA@10V
—Efficiency up to 75%
? Positive Output, VGH
—Adjustable Voltage up to 20V@2mA
? Negative Output, VGL
—Adjustable Voltage low to -20V@2mA
? Soft-Start
? Over-current protection cycle by cycle
? Thermal shutdown
? DFN-12L Package
Applications
? Small Form Factor a-Si and LTPS TFT LCD
? PDAs
? Cellular Phones
? MP3 Players
? GPS Receivers
Description
The HX3008 DC-DC converter supplies all three voltages required by small thin film transistor (TFT) liquid crystal display (LCD) panels. The compact HX3008 uses a single inductor to generate independently regulated positive and negative outputs.
The main output, AVDD, 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, low to -20 V for the LCD gate drive. The device has internal over-current protection cycle by cycle and thermal shutdown for high reliability during fault conditions.
The HX3008 is available in a DFN-12L package.
Typical Application Circuit
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