The CZH8022W is a single‑channel touch chip for LED brightness and on/off control with multiple dimming modes and wide voltage range.
The CZH8022W touch chip from Chuang Zhihui provides LED lighting control through touch input. It supports four selectable functions, adjustable voltage range (2.4‑5.5 V), and features such as anti‑interference, memory‑based dimming, and eye‑friendly gradual brightness changes.
The device is offered in DIP‑8 or SOP‑8 packages with detailed pin assignments, mechanical dimensions, and example application circuits for battery, AC‑220 V, and switching‑power supplies. Electrical parameters, BOM, and revision history are also included. This manual is written in Chinese.
| Working voltage | 5.1 V |
|---|---|
| Working current | 700 µA |
| Standby current | 20 µA |
| Input high level | (2/3) VDD |
| Input low level | (1/3) VDD |
| Output high‑level current | 7 mA |
| Output low‑level current | 12 mA |
| Operating temperature | -20 °C to 70 °C |
| Storage temperature | -50 °C to 100 °C |
It can operate with an input voltage anywhere between 2.4 V and 5.5 V.
Four functions can be selected by setting the OPT1 and OPT2 pins before power‑up.
Adjust the value of the C3 sampling capacitor between VC and GND to change sensitivity.
The initial brightness is fixed at 50 % of the full brightness.