TM1926D: Twelve-Channel Fixed Constant Current LED Driver IC
The TM1926D is a high-performance IC designed for twelve-channel fixed constant current LED driving. It integrates an MCU-based single-wire digital interface, data latches, LED constant current drivers, and PWM brightness control. With a single-wire cascading interface (DI, DO), external controllers can manage the TM1926D and its subsequent cascaded chips with just one signal line. The PWM brightness for each output channel is individually adjustable via an external controller. Its built-in 5V voltage regulator reduces external components, making it simple and efficient to use. The TM1926D is ideal for a range of LED decorative applications and ensures exceptional performance and reliability.
Key Features
- Advanced CMOS Process
Delivers high performance and efficiency. - High Voltage Tolerance
- Output ports (OUT) support up to 24V.
- Fixed constant current output of 17mA per channel.
- Integrated 5V Voltage Regulator
- Supports an input voltage range of 6V to 24V with an external resistor.
- PWM Brightness Control
- Offers 256 brightness levels for precise adjustments.
- High scanning frequency above 3KHz ensures flicker-free operation.
- Single-Wire Serial Cascade Interface
- Simplifies cascading of multiple chips using DI and DO pins.
- Automatically regenerates and transmits signals to subsequent chips without distortion or attenuation, even over long distances.
- Reliable Signal Transmission
- Transmission distance between any two chips is at least 30 meters.
- Supports a data rate of up to 800Kbps.
- Power-On Reset Circuit
- Resets registers upon startup.
- Default power-on configuration: blue light with a 25% duty cycle.
- High Refresh Rate
- Supports cascading of up to 1024 chips at a refresh rate of 30 frames per second.
- Compact Packaging
- Available in SOP16 and DIP16 packages for easy integration.
Applications
The TM1926D is suitable for a variety of LED decorative lighting solutions, including:
- Point Light Sources
Perfect for dynamic and colorful lighting displays. - Light Bars and Tubes
Ideal for architectural and decorative lighting designs. - Flexible LED Strips
Enables energy-efficient, customizable strip lighting. - Wall Wash Lights
Provides consistent and vivid lighting for large-scale installations.
Specifications
| Parameter | Value |
|---|---|
| Channels | 12 |
| Output Current | Fixed at 17mA |
| Input Voltage Range | 6V–24V (with resistor) |
| Output Voltage Tolerance | Up to 24V |
| Brightness Levels | 256 (via PWM control) |
| Data Rate | 800Kbps |
| Cascade Distance | ≥30 meters between chips |
| Packaging | SOP16, DIP16 |
Why Choose TM1926D?
- Simplified Design: Reduces external component count with integrated features like the 5V regulator and power-on reset.
- Precise Control: Offers accurate brightness adjustments and consistent current output.
- Versatile Applications: Tailored for a wide range of LED decorative and architectural lighting projects.
- Durable and Reliable: Ensures signal integrity and stable operation even with extended cascading.
The TM1926D is the perfect choice for modern LED decorative lighting, delivering excellent performance, reliability, and design flexibility.
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