TM512AC DMX512 LED Driver IC for High-Precision Constant Current Output

TM512AC DMX512 LED Driver IC for High-Precision Constant Current Output

The TM512AC is a high-performance DMX512 differential parallel protocol LED driver IC designed for high-quality, constant current output across four channels. Featuring a 16-bit grayscale level and enhanced gamma correction (2.2), it closely aligns with human visual perception, ensuring an optimized lighting experience. The TM512AC decodes DMX512 signals with precision, providing full compatibility with DMX512 protocols, and it can extend signal reach without the need for rate settings, with adaptive decoding for transmission speeds between 200Kbps and 1000Kbps. It offers up to 4096-channel addressing, making it ideal for large-scale installations.

This LED driver integrates EEPROM, eliminating the need for external components. It supports online programming and can be configured with either external resistors for current output settings or use a fixed 18mA constant current output. The chip also features PWM reverse polarity down-frequency output, suitable for expanding current drive capacity with external transistors or MOSFETs. With a high refresh rate and the ability to short multiple constant current output interfaces, it provides superior performance in LED lighting systems.

The TM512AC is designed for architectural lighting and stage lighting applications, where reliability, performance, and ease of maintenance are crucial. The chip’s failure does not affect other devices in the system, allowing for seamless operation.

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Key Features of TM512AC:

• DMX512 Protocol Compatibility: Fully compatible with DMX512 (1990) signal protocol and can extend and adapt signals.
• Control Mode: Differential parallel control, supports up to 4096 channels addressing.
• High-Speed DMX512 Decoding: Patented high-speed algorithm for transmission speeds between 200Kbps and 1000Kbps.
• Built-in 485 Module: High-resolution differential signal with large input impedance, enhancing load capacity.
• Integrated EEPROM: Eliminates the need for external EEPROM.
• Online Code Writing: Supports code writing via AB lines, allowing for post-installation programming.
• Dual Address Backup Mode: Ensures address code is preserved even if part of the EEPROM fails.
• PWM Reverse Polarity Frequency Down: Allows for PWM frequency adjustment to 250Hz for better signal stability.
• 16-Bit Grayscale Control: Offers precise 16-bit grayscale control with enhanced gamma correction (2.2).
• High Refresh Rate: Capable of achieving up to 2kHz refresh rate for smooth performance.
• Integrated 5V Regulator: Simplifies power design.
• High Voltage Output: Each channel can handle output voltages greater than 30V.
• Adjustable Current Output: External adjustable resistors for current output range from 3mA to 80mA per channel.
• Fixed 18mA Output Option: Available with SSOP10 packaging.
• Low Channel-to-Channel Error: ±3% variation between channels and chips.
• Power-On Self-Check & LED Indicators: Blue LED for startup self-check and color indicators for address assignment status.
• No Power Cycle for New Addressing: New addresses take effect without needing to power cycle the device.
• Output Channel Hysteresis: 80ns delay reduces current surge interference.
• Industrial-Grade Stability: Built for reliable, long-term performance.

Specifications

Parameter	Value
Control Mode	Differential Parallel, up to 4096 channels addressing
DMX512 Decoding Speed	200Kbps – 1000Kbps
Output Channels	4 (OUTR, OUTG, OUTB, OUTW)
Grayscale Control	16-bit grayscale with enhanced gamma correction (2.2)
PWM Reverse Polarity Frequency	250Hz (down-frequency function)
Current Output per Channel	Adjustable (3mA – 80mA) or fixed 18mA
Output Voltage Tolerance	>30V
Addressing	Up to 4096 channels
Refresh Rate	Up to 2kHz
Data Transfer Rate	Up to 800KHz
Built-in 5V Regulator	Yes
EEPROM	Integrated, no external required
Power-On Reset	Yes
Operating Voltage	6V–24V
Package Type	SOP16, SSOP10
Channel-to-Channel Error	±3%
Chip-to-Chip Error	±3%
Hysteresis	80ns delay

Applications:

• Point Light Sources: Ideal for pixel and decorative lighting.
• Line Lights & Wall Wash Lights: Perfect for linear and wall lighting effects.
• Stage Lighting Systems: Suitable for high-end lighting in entertainment venues.
• Indoor/Outdoor Video Walls: Excellent for large-scale video displays and signage.
• Decorative Lighting Systems: Tailored for architectural and decorative lighting installations.

Package Options:

• SOP16
• SSOP10

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Why Choose TM512AC?

• High Precision & Versatility: Offers excellent performance for both small and large-scale lighting setups.
• Reliable DMX512 Signal Decoding: Fully compatible with DMX512, easy to integrate and expand.
• Advanced Features for Professional Installations: Self-check, online writing, and high refresh rates ensure reliable and smooth operation.
• Compact & Efficient: Integrated solutions reduce the need for additional components, saving space and simplifying design.

The TM512AC is the ideal solution for complex architectural and stage lighting systems, providing high-quality control, reliability, and ease of integration.