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
• Patented1 BrightExtend™ Technology
 Maintains Color-Accuracy and PSRR for Battery-
Powered Applications with Low Vin
• Proprietary CoolExtend™ Technology
 2-bit Programmable Max. Die-Temp Regulation
• 0.4μA Automatic Shutdown (Standby) Current
• 1MHz I2C Interface with Multiple Slave Addresses
• 2.5V to 5.5V Operating Supply Voltage Range
• -40°C to 85°C Operating Temperature Range
• 20 pin UQFN 3x3mm (0.4mm pitch)
• RoHS and Green Compliant

Applications

• AI Smart Speakers, Bluetooth / WiFi Loudspeakers
• Automotive Panel, Accent and Mood Lighting
• IoT, Gaming PC/Keyboards/Controllers/VR, Robots

Brief Description

The KTD2061/58/59/60 are fully programmable current
regulators for up to 12 RGB LED modules (36 LEDs
total). 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.
BrightExtend™ optionally reduces dropout when the
input voltage is too low for the forward voltage of the
LEDs, enabling battery-powered applications.
Programmable CoolExtend™ prevents excessive heat
by regulating die temperature when the input voltage,
current settings, and/or ambient temperature are high.
The KTD2061/58/59/60 are packaged in RoHS and
Green compliant 3mm x 3mm UQFN packages with
0.58mm maximum height.