TM512ADH

TM512ADH is a DMX512 differential parallel protocol LED driver IC featuring selectable 1, 2, 3, or 4-channel high-precision constant current output with 65536 grayscale levels. The IC is packaged in a high-current output version with a heatsink pad. Its decoding technology enables precise DMX512 signal decoding, with compatibility and extension of the 512 protocol signal. It achieves fully adaptive decoding of DMX512 signals with transmission rates ranging from 200K to 1000 kbps — no speed configuration required — and supports addressing of up to 4096 channels. The IC integrates built-in E2PROM, eliminating the need for external memory. It supports AB-line online code writing, allowing code writing to be completed without connecting the luminaire's code-writing lines to a programmer, offering simple connections and flexible configuration. Additionally, TM512ADH allows parameters to be configured in E2PROM, including power-on illumination state, field selection, and current adjustment. The IC provides 4 high-precision constant current output channels with a withstand voltage exceeding 28V and output current up to 200mA per channel. Output current is set via a single external resistor and can be independently adjusted in 64 steps per channel via software, with a dedicated 4-color independent current setting mode. TM512ADH features PWM inverted output, making it suitable for applications with external transistors, MOSFETs, or high-current constant current driver ICs, along with adjustable RGBW output timing compensation. A 4K high port refresh rate significantly improves screen refresh performance. TM512ADH supports shorting multiple constant current output interfaces together to expand current drive capability. It is primarily designed for LED lighting systems in architectural decoration and stage lighting applications, optimized for parallel-connected LED lighting systems where a fault in a single IC does not affect the normal operation of others, enabling simple and convenient maintenance. This product delivers excellent performance and reliable quality.

Applications

• Point light source
• Linear light
• Wall washer
• Stage lighting system
• Indoor/outdoor video wall

Key features

• Compatible with and extending the DMX512 (1990) signal protocol
• Control method: differential parallel, supporting up to 4096 channels
• Adaptive decoding technology with up to 12-bit precision, enabling accurate adaptive decoding of DMX512 signals at transmission rates from 200K to 1000kbps
• Built-in 485 module with high differential signal resolution and large differential input impedance, significantly enhancing load-driving capability
• Built-in pull-up on IC AI port, providing certain anti-interference capability when AIBI lines are floating
• AIBI line in-line code writing; maximum code writing line length limited only by AIBI bus length
• Independent parameter writing function — parameters can be written individually without re-coding
• TM512ADH configurable parameters: 1. Power-on lighting state + field selection + no-signal lighting state 2. Current level
• TM512ADH supports 3× current multiplier for pin "W" (4-color mode) via SET pin
• Power-on lighting state parameter: selects any grayscale combination of the 4 RGBW output ports at power-on, usable as a unique brand identifier
• Field selection parameter: supports 1, 2, or 4 field selection; selecting an appropriate field reduces data transmission volume while expanding current output
• No-signal lighting parameter: configures whether the display holds the last frame or reverts to the power-on lighting color after 1S of no signal
• Current level parameter: the current adjustment resistor sets the maximum current value; the current level parameter allows stepped adjustment of the maximum current, configurable in 1–64 levels
• Code writing and parameter writing take effect immediately — no power cycle required
• Successful code writing: first LED lights yellow at 22%, subsequent LEDs light white at 22%, intuitively indicating breakpoint position
• Successful parameter writing (power-on lighting + field + 1S no-signal lighting): first LED lights yellow at 22%, subsequent LEDs light according to power-on lighting byte data
• Successful current parameter writing: first LED lights yellow at 22%, subsequent LEDs light red at 22%
• TM512ADH corrects 256 grayscale levels to 65536 levels; correction coefficient: Gamma 2.2
• R/G/B/W four-channel constant current output, ±3% inter-chip high-precision current matching
• Externally adjustable constant current resistor; TM512ADH per-channel current range: 10~200mA
• TM512ADH features over-temperature protection
• Port refresh frequency: using frequency expansion mode, port refresh frequency up to 4K — no banding in smartphone/camera capture; Level 1: 250Hz, Level 2: 500Hz, Level 4: 1KHz, Level 8: 2KHz, Level 16: 4KHz
• PWM selection pin supports reverse polarity function; reverse polarity output does not alter port refresh rate
• TM512ADH features port delayed-off compensation pin COM; adding a resistor from COM to GND sets the port delayed-off time; floating = no delay on RGBW port output. The compensation function effectively interfaces with all high-power constant current ICs
• Built-in 5V Zener diode; RGBW output port withstand voltage: 30V
• Low-voltage enhancement function; stable operation down to 2.5V, greatly improving 5V power supply system stability
• Built-in anti-interference module, significantly enhancing noise immunity
• 80nS output channel hysteresis, reducing surge current interference
• Industrial-grade design, stable performance
• Package: ESOP16