CM501 PDF – PMIC for LCD TV – Richtek

In this post, We learn more about CM501.

Part number : CM501

Manufacturer : Richtek

Functions : LCD driver for Sharp LC-42SV50U.

Package information : QFN48 Type

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Description :

The CM501 generates all the supply rails for thin-film transistor (TFT) liquid-crystal display (LCD) panels in TVs and Monitors. It includes boost and buck regulators, VGH and VGL charge pump regulators, gate pulse modulator (GPM) , HV LDO, voltage detector (XAO) and VCOM OP. The CM501 can support input voltage from 8V to 14V and is optimized for LCD TV panel and LCD monitor applications running directly from 12V supply. The boost and buck regulators feature internal power MOSFETs and high-frequency operation allowing the use of small inductors and capacitors, resulting in a compact solution. Both switching regulators use fixed-frequency, current-mode control architectures, providing fast loadtransient response and easy compensation. The VGH and VGL charge-pump regulators provide supply voltages for TFT gate driver. Both output voltages can be adjusted with external resistive voltage dividers.


CM501 Circuit


1. 8V to 14V Supply Input Voltage Range
2. Current-Mode Boost Regulator
3. 20V 3.5A 0.1Ω Internal N-MOSFET
4. Programmable Over Current Protection Voltage
5. ±1% Accurate Output
6. Progremmable Soft-start
7. Under Voltage Protection
8. Short Circuit Protection
9. Over Temperature Protection
10. Power On Sequence Control


CM501 pinout

CM501 Datasheet

CM501 datasheet pdf

Reference site