The TM1804 is a versatile and high-performance three-channel LED driver IC, specifically designed for LED control applications. This integrated circuit combines an MCU digital interface, data latching, and high-voltage LED driving circuits into a single compact unit. It features an integrated 5V regulator (VDD) and offers both independent brightness control and cascading functionality for large-scale outdoor full-color LED displays and decorative lighting systems. Built for reliability and high performance, the TM1804 is ideal for use in applications such as point light sources, LED strips, and more.
Specifications
| Parameter | Value |
|---|---|
| Channels | 3 |
| Output Current Per Channel | 14mA |
| Brightness Adjustment | 256 PWM Levels |
| Input Voltage Range | 6V–24V (with resistor) |
| Data Transfer Speed | Up to 800KHz |
| Interface Type | Single-wire (DIN/FDIN) |
| Package Type | SOP8, DIP8, SOT23-8 |
| Output Voltage Tolerance | 30V |
| PWM Scan Frequency | ≥400Hz |
| Operating Temperature | -40°C to +85°C |
| Cascading Capability | Up to 512 points (low speed), 1024 points (high speed) |
| Power-on Reset | Built-in power-on reset circuit |
| Integrated 5V Regulator | Yes (VDD) |
Key Features of TM1804
- High-Voltage Power CMOS Technology: Manufactured using high-voltage CMOS technology, ensuring efficient operation and long-lasting performance for demanding LED control tasks.
- 30V Output Voltage Tolerance: Output ports are designed to handle up to 30V, providing robustness and flexibility in a variety of installation environments.
- Integrated 5V Voltage Regulator (VDD): Features an integrated 5V regulator, reducing the need for additional external voltage regulation components, making it ideal for simplified circuit designs.
- Wide Input Voltage Range: Supports input voltages ranging from 6V to 24V. When using a non-5V supply, VDD must be connected with a series resistor and a 5V regulator to GND for stable operation.
- 256-Level Brightness Adjustment: The built-in brightness control circuit allows for 256 levels of brightness, with an effective 1024-level adjustment at lower brightness, offering fine-tuned control for smooth, consistent light output.
- Single-Wire Serial Cascading Interface: Features a single-wire serial cascading interface, making it simple to connect multiple units in large systems, perfect for outdoor LED displays and lighting installations.
- Integrated RC Oscillator: The chip uses an integrated RC oscillator, which ensures synchronization with data signals and eliminates distortion or signal loss even in large cascaded systems.
- Built-in Power-On Reset Circuit: The power-on reset function ensures reliable startup, preventing errors during the initial power-up sequence.
- PWM Brightness Control: The chip includes PWM (Pulse Width Modulation) control, enabling 256 levels of brightness adjustment, with a scan frequency of at least 400Hz for smooth operation.
- Data Transmission via Single Signal Line: Capable of receiving and decoding data through just one signal line, simplifying wiring and reducing complexity in system design.
- Dual Data Transfer Rates: Provides flexible data transfer speeds, with options for 400Kbps or 800Kbps, enabling high-speed data transmission in large-scale installations.
Applications
The TM1804 is perfect for a wide range of applications, including:
- Point light sources (e.g., decorative lighting)
- LED strips for signage and decorative effects
- Guardrail tubes, flood lights, and other outdoor lighting systems
- Large-scale outdoor LED displays and full-color matrix screens for advertising and public displays
Why Choose the TM1804 for Your LED Control Needs?
The TM1804 is engineered for high-efficiency LED control, providing exceptional brightness adjustment, robust cascading support, and simple integration into various lighting and display applications. Whether you’re building an outdoor LED billboard, upgrading architectural lighting, or enhancing stage lighting, the TM1804 provides the necessary flexibility, performance, and reliability to create stunning visual effects and large-scale installations.
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