The TM1914A is a specialized IC designed for three-channel LED constant current driving with a single-wire interface. It features dual-channel digital inputs (DIN and FDIN) that can switch seamlessly, enabling cascading via the DO pin. External controllers can control the chip with just a single wire. The TM1914A integrates an MCU-based dual-channel single-wire digital interface, data latches, LED constant current drivers, and PWM brightness control circuits. With a built-in 5V regulator at the VDD pin and minimal external components required, it is ideal for LED decorative products such as light bars and point light sources. This product boasts high performance and reliable quality.
Key Features
- Advanced CMOS Process
Ensures efficient and stable operation. - High Voltage Tolerance
Output ports (OUT) support up to 24V. - Built-in 5V Regulator
Allows input voltage between 6V and 24V with an external series resistor. - Fixed Constant Current Output
Provides a steady current of 18mA for each channel. - PWM Brightness Control
Supports 256 levels of brightness adjustment for smooth dimming effects. - Accurate Current Output
- Maximum inter-channel current deviation: ±3%.
- Maximum chip-to-chip current deviation: ±5%.
- Dual-Channel Single-Wire Cascade Interface
- Configurable data input through DIN or FDIN pins.
- Supports seamless switching between input modes.
- Data forwarding via the DO pin ensures uninterrupted cascading, even if one chip fails.
- Reliable Signal Transmission
- Built-in RC oscillator synchronizes with data line signals.
- Automatically regenerates and transmits data to subsequent chips without distortion or attenuation, regardless of cascading distance.
- Power-On Reset Circuit
Initializes all registers to zero upon power-up for reliable startup. - High-Speed Data Transfer
Supports a transmission rate of 800KHz, ensuring efficient operation in complex lighting setups. - Compact Packaging
Available in SOP8 package for easy integration.
Applications
The TM1914A is suitable for a wide range of LED decorative applications, including:
- LED Light Bars
Ideal for creating vibrant and customizable lighting effects in architectural and decorative designs. - Point Light Sources
Provides precise control for dynamic and colorful LED displays.
Specifications
| Parameter | Value |
|---|---|
| Channels | 3 |
| Output Current | Fixed at 18mA |
| Input Voltage Range | 6V–24V (with resistor) |
| Output Voltage Tolerance | Up to 24V |
| Brightness Levels | 256 (via PWM control) |
| Data Rate | 800KHz |
| Packaging | SOP8 |
Why Choose TM1914A?
- Precision and Stability: Delivers accurate and consistent LED current outputs across all channels and chips.
- Seamless Cascade Control: Ensures reliable cascading with dual-channel input options and data regeneration.
- Flexible Integration: Simplifies design with single-wire control and minimal external components.
- High Reliability: Built-in features like power-on reset and signal synchronization enhance durability.
The TM1914A offers a comprehensive solution for efficient and dynamic LED decorative lighting, combining precision, reliability, and ease of use.
Reviews
There are no reviews yet.