TM1911: High-Precision Single-Channel LED Constant Current Driver Chip
The TM1911 is a high-precision single-channel LED constant current driver chip, ideal for a variety of LED lighting applications. It features an adjustable output current through an external resistor, ultra-low dropout voltage, and a wide input voltage range. The chip supports PWM dimming frequencies between 100Hz and 20kHz, achieving a dimming depth of 1024:1 at 100Hz. Its built-in over-temperature protection ensures reliable operation, while its compact design with minimal external components makes it highly suitable for efficient LED lighting solutions. The TM1911 is environmentally friendly, featuring lead-free packaging.
Key Features
- Single-Channel Constant Current Drive
Designed for precise LED current control in lighting applications. - Adjustable Output Current
Output current ranges from 15mA to 350mA, configurable via an external resistor. - Wide Input Voltage Range
Supports an input voltage range of 4.5V to 24V, suitable for various power supply scenarios. - Ultra-Low Dropout Voltage
Dropout voltage as low as 300mV at 20mA, ensuring high efficiency even in low-voltage conditions. - PWM Dimming Support
Supports 100Hz to 20kHz dimming frequencies, with a dimming depth of 1024:1 at 100Hz for precise brightness control. - High Current Accuracy
Delivers an accuracy of ±5% for consistent and stable LED brightness. - Over-Temperature Protection
Reduces output current linearly when the junction temperature exceeds 135℃, preventing thermal damage. - Eco-Friendly Packaging
Available in SOT23-6 and SOIC8-EP lead-free packages, compliant with environmental standards.
Specifications
| Parameter | Value |
|---|---|
| Output Channels | Single-channel |
| Output Current Range | 15mA–350mA (adjustable via resistor) |
| Input Voltage Range | 4.5V–24V |
| Dropout Voltage | 300mV @ 20mA |
| PWM Dimming Frequency | 100Hz–20kHz |
| Dimming Depth | 1024:1 @ 100Hz |
| Current Accuracy | ±5% |
| Packaging | SOT23-6, SOIC8-EP |
Applications
The TM1911 is designed for a wide range of LED lighting products, including:
- Signboard Lighting
Perfect for trademarks, directional signs, warehouse storage, and parking lot signage. - LED Light Strips and Tapes
Ensures uniform brightness and precise current control for decorative and functional light strips. - Illuminated Letters and Advertising Displays
Provides reliable current regulation for professional-grade illuminated signs and letters. - Indoor and Outdoor LED Lighting
Ideal for high-efficiency, long-lasting general lighting solutions.
Why Choose TM1911?
- Exceptional Accuracy and Stability: Guarantees consistent LED performance across various conditions.
- Wide Dimming Range: Supports high-frequency PWM dimming with deep dimming ratios for flexible lighting effects.
- Simplified Integration: Minimal external components reduce design complexity and manufacturing costs.
- Sustainable and Reliable: Eco-friendly packaging and robust protection features ensure long-term use.
The TM1911 is the optimal solution for high-performance, energy-efficient LED lighting products. Its advanced features, combined with exceptional reliability and precision, make it an essential component for your next LED project.
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