Features

• Drives up to 24 LEDs (8 RGBs)
• Multiplexed LED Current Driver Outputs
 Only 8 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
• 24 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 KTD2064 is a fully programmable current regulator
for up to 8 RGB LED modules (24 LEDs total). The
device is ideally powered from a supply rail in the 3V to
5V nominal range. Two 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, see the KTD2061/58/59/60.
24 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 ultra-smooth 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 KTD2064 is packaged in RoHS and Green
compliant 3mm x 3mm, ultra-thin, 20-pin UQFN
package.