TPS65170,pdf(LCD Bias Supply)

The TPS65170 provides a simple and economic power supply solution for a wide variety of LCD bias applications.

In typical display panel applications, the boost converter generates the display panel’s source voltage V_S, the buck converter generates the system’s logic supply V_LOGIC, and the two charge pump controllers regulate the external charge pumps generating the display transistors’ on and off supplies V_GH and V_GL.

By using external transistors to regulate the charge pump output voltage, power dissipation in the IC is significantly reduced, simplifying PCB thermal design and improving reliability.

The TPS65170 also provides a reset circuit that monitors the buck converter output (V_LOGIC) and generates a reset signal for the timing controller during power-up.