The UCS2904B is a 4-channel LED driver IC that is designed to control RGB LED lights. It is a pulse width modulation (PWM) controller that uses a serial communication protocol to control the brightness and color of the LEDs.
The UCS2904B supports the I2C (Inter-Integrated Circuit) protocol, which is a type of serial communication protocol that allows multiple devices to communicate with each other using a two-wire interface. The I2C protocol uses a master-slave architecture, where the UCS2904B acts as a slave device and is controlled by a master device, such as a
microcontroller or a computer.
The UCS2904B also supports a proprietary serial communication protocol called the RGB LED Control Protocol , which allows you to control the LEDs using a serial interface.
This protocol is mainly used to control the brightness of the LEDs and adjust their color. The protocol defines a set of commands that are used to control the LEDs, such as setting the brightness, setting the color, and reading the status of the LEDs.
It also provides features such as adjustable current for each channel, thermal shutdown and short-circuit protection.
- Updated Comparison Table for Two Protocols
| Specification | UCS2904B | WS2801 |
|---|---|---|
| Clock Type | Data-Only | Clocked |
| Color Resolution | 8 bits | 8 bits |
| Physical Package | SOP8 | SOP14 |
| RGB | See UCS2903 | Yes |
| RGBW | Yes | See WS2814 |
| Output Pixel Voltage | 5 – 24V | 5V |
| PWM Rate | 1800Hz | 2500Hz |
| Suitable Camera | Up to 60fps | Up to 84fps |
| Data Transfer Rate | 800kbps | Not specified |
| Redundant Data Line | No | No |
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