TM1814 Quad-Channel LED Constant Current Driver IC with Internal Sync Function

TM1814 Quad-Channel LED Constant Current Driver IC with Internal Sync Function

The TM1814 is a sophisticated quad-channel LED constant current driver IC featuring internal synchronization and adjustable current control, making it ideal for creating dynamic lighting effects. It allows MCU input for setting constant current and PWM brightness control, offering a variety of display patterns. Once the input signal is disconnected, the chip will seamlessly continue to display a synchronized, fixed multi-color pattern, ensuring the continuity of operation even if a cascading chip fails. With integrated MCU firmware, single-wire digital interface, data latching, and LED constant current driving circuits, the TM1814 is designed for efficient and reliable LED control.

The VDD pin includes an integrated 5V voltage regulator, minimizing the need for external components and simplifying the design.

Key Features of TM1814:

• High-Power CMOS Technology: Built using high-power CMOS technology to ensure optimal performance and efficiency in demanding applications.
• 32V Output Voltage Tolerance: The OUT ports can handle up to 32V, providing reliable operation even in high-voltage environments.
• Built-in 5V Voltage Regulator: The VDD pin integrates a 5V voltage regulator, allowing for easy integration and supporting a voltage range of 6V to 24V when a series resistor is added.
• 64-Level Adjustable Constant Current: Supports 64-level current adjustment (from 6.5mA to 38mA) for precise control over the LED brightness and power.
• PWM Brightness Control: Features 256 levels of PWM brightness control, allowing fine-tuned adjustments for smoother lighting transitions and effects.
• High Accuracy Current Output:
  • Max Error between Channels: ±3% (ensuring uniformity in multi-channel applications).
  • Max Error between Chips: ±5% (ensuring consistency across cascaded units).
• Single-Wire Serial Cascading Interface: The chip uses a single-wire serial interface for easy cascading, simplifying the wiring in large installations.
• Integrated RC Oscillator: The internal RC oscillator synchronizes the chip to the data signals. After receiving data, the chip automatically regenerates the signal and transmits it to the next chip without distortion or degradation, even in long cascades.
• Built-in Power-On Reset: The built-in reset circuit ensures that all registers are initialized to zero upon startup, guaranteeing reliable operation.
• External Control Mode: The data transmission rate is 800KHz in external control mode for fast data transfer.
• Internal Control Mode: In internal control mode, the data transmission rate is 500KHz, and the chip can send data for up to 1918 points, allowing for complex display configurations.
• Compact Packaging: Available in the SOP8 package for space-efficient integration into a variety of designs.

Applications:

The TM1814 is perfect for use in a wide range of LED decorative products, including:

• Guardrail tubes, point light sources, and LED strips for dynamic lighting displays
• LED-based signage, advertising displays, and architectural lighting requiring adjustable constant current control
• Large-scale LED installations where cascading functionality and synchronization are essential

Why Choose TM1814 for Your LED Projects?

The TM1814 offers a robust and flexible solution for a wide array of LED applications, especially those requiring precise control over current and brightness. Its integrated synchronization and automatic data regeneration make it ideal for cascading applications, ensuring that even if one chip fails, the rest of the system will continue to function correctly. With its adjustable current control, PWM brightness adjustment, and easy cascading interface, the TM1814 is perfect for decorative lighting, point light source displays, and dynamic signage applications.