Yes, that is correct. The UCS2904B and WS2811 are different kinds of integrated circuits (ICs) or chips that are used to control addressable LEDs. Both of them are designed to control RGB LED lights and have similar functionality, but they have different communication protocols and features.
The UCS2904B is a 4-channel LED driver IC that uses I2C and the proprietary RGB LED Control Protocol for communication. It supports adjustable current for each channel, thermal shutdown, and short-circuit protection.
| Specification | UCS2904B (Protocol 1) | WS2801 (Protocol 3) |
|---|---|---|
| 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 |
On the other hand, WS2811 is a single-wire control circuit that uses a proprietary communication protocol based on PWM to control the brightness and color of the LEDs. It is a cost-effective and space-saving solution for controlling RGB LED lights.
Both ICs are widely used in various applications such as LED lighting, LED displays, LED matrix and more. But depending on the specific application and the requirements it may be more suitable to use one or the other.