The KTD2061Q/58Q/59Q/60Q are fully programmable current regulators for up to 12 RGB LED modules (36 LEDs total) for automotive 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 KTD2061Q/58Q/59Q/60Q 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.

BrightExtendTM optionally reduces dropout when the input voltage is too low for the forward voltage of the LEDs, enabling battery-powered applications. Programmable CoolExtendTM prevents excessive heat by regulating die temperature when the input voltage, current settings, and/or ambient temperature are high. The KTD2061Q/58Q/59Q/60Q are packaged in RoHS and Green compliant 3mm x 3mm UQFN packages with 0.60mm maximum height.

For the industrial grade (-40°C to 85°C) version of this product, please visit the KTD2061/58/59/60.


  • 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
  • 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
  • AEC-Q100 Qualified
  • -40°C to 125°C Operating Temperature Range
  • 20 pin UQFN 3x3mm (0.4mm pitch)


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

Packaging Information

Package Dimensions Bumps Package Code
UQFN33-20 3.00mm x 3.00mm x 0.55mm 20 UAC


Vin (min)  Vin (max)  Vout (Min) Vout (Max) LED Channels Current per Channel No Load ICC – Enabled (mA) No Load ICC – Shutdown (µA)
2.5V 5.5V 2.5V 5.5V 36 24mA 1.0mA Typ. 0.4 µATyp.

Technical Documentation

Description Documents Type
Package Outline DrawingUQFN33-20 UAC PODPDF


Part Number Default I2C Slave Address Marking Operating Temperature Package
KTD2061QGUAC-TR 0x68 default NTYWZ aabbccc -40°C to +85°C UQFN33-20
KTD2058QGUAC-TR 0x69 alternate PTYWZ aabbccc -40°C to +85°C UQFN33-20
KTD2059QGUAC-TR 0x6A alternate PUYWZ aabbccc -40°C to +85°C UQFN33-20
KTD2060QGUAC-TR 0x6B alternate PVYWZ aabbccc -40°C to +85°C UQFN33-20
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