THV3543

Summary

The THV3543 is a controller IC for multi-channel power supply system which includes 2-channel DC/DC converter with built-in power MOSFETs and 2-channel charge pump circuits. The THV3543 has internal soft start, under voltage protection, over voltage protection and over current protection. CH-1 is a Boost DC/DC converter which can provide two optional modes of output voltage: the adjustable mode with external resistor or the fixed 15.6V mode requires no external resistors.
CH-2 is a Buck DC/DC converter. Its output voltage is fixed at 3.3V. Positive charge pump (VGH) and negative charge pump (VGL) can provide two optional modes of output voltage: the adjustable mode with external resistor or the fixed mode (VGH at 35.6V, VGL at -6V) requires no external resistors. THV3543 has LDO and operational amplifier which can be used for Half AVDD or Vcom. Thus the THV3543 can produce various necessary voltages for LCD panels and ideal for constructing TFT-LCD Bias power supply system.

Features

  • Input Voltage Range : 4.2 to 15V
  • Boost Converter with built-in Power MOSFET
  • Buck Converter with built-in Power MOSFET
  • 500kHz Switching Frequency
  • Protection Function
    Under Voltage Protection
    Over Voltage Protection
    Over Current Protection
  • Positive/Negative Charge Pumps
  • LDO
  • Operational Amplifier
  • QFN 40pin

Block Diagram

Recommended Operation Conditions
Parameter Min Typ Max Units
VCC Voltage (Input Power Supply Voltage) 4.2  - 15  V
V_VGH, V_VGL Voltage 4.2  - 17  V
LSW_OUT Voltage -0.1  - 17  V

 

 

Related Products

PMIC (Power IC)
THV Series of Power Management IC