The KTD2061/58/59/60 are fully programmable current regulators for up to 12 RGB LED modules (36 LEDs total) for industrial applications. The devices are ideally powered from a supply rail in the 3V to 5V nominal range. Three 4-wire buses are multiplexed to reduce the pin-count and PCB traces to the LEDs.
The I2C control interface is used to set the LED color palette and then dynamically select the on/off status and color of each RGB module. For applications requiring more RGBs on one I2C bus, the KTD2061/58/59/60 have different slave addresses.
36 independent fade-up/down engines are integrated for independent ramping of each LED’s current during on/off, brightness, and color transitions without software burden. The exponential current ramps provide visually pleasing fades with eight I2C programmable fade-rate settings. 3072-step fade resolution ensures ultrasmooth visual effects.
Main Features:
- Drives up to 36 LEDs (12 RGBs)
- Multiplexed LED Current Driver Outputs
- Only 12 PCB Traces to the LEDs
- 23kHz MUX Frequency Prevents Audio Noise
- 14 Million Colors
- LED Current: 125µA to 24mA in 125µA Steps
- Night-Mode: 8µA to 1.5mA in 8µA Steps
- 5% Max. Current Accuracy & Matching
- 36 Independent Exponential Fade-Engines
- Ultra-Smooth 3072-Step Fade Resolution
- 3-bit Programmable Fade Rate
- Dramatically Reduces Software Complexity
- Patented (US Patent 8,482,216 B1) BrightExtend™ Technology
- Maintains Color-Accuracy and PSRR for Battery-Powered Applications with Low Vin
