Features

• Drives up to 12 LEDs (4 RGBs)

• Multiplexed LED Current Driver Outputs

 Only 4 PCB Traces to the LEDs

 20.8kHz 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

• 12 Independent Exponential Fade-Engines

 Ultra-Smooth 3072-Step (8μA) Fade Resolution

 3-bit Programmable Fade-Rate

• Flexible Pattern Generator with Watchdog Counter

• Optional AutoBreathe™ Mode (KTD2052B/D)

• Patented1 BrightExtend™ Technology

 Maintains Color-Accuracy and PSRR for Battery-

Powered Applications with Low Vin

• Proprietary CoolExtend™ Technology

 2-bit Programmable Maximum Die-Temp

• 0.6μA Automatic Shutdown (Standby) Current

• 1MHz I2C Serial Interface

• 2.5V to 5.5V Operating Supply Voltage Range

• -40°C to +85°C Operating Temperature Range

• 8 pin UDFN 2x2mm (0.5mm pitch)

Applications

• AI Smart Speakers, Bluetooth / WiFi Loudspeakers

• Automotive Indicator and Ambiance Lighting

• IoT, Gaming, Toys, Indicator / Button Lighting

Brief Description

The KTD2052 is a fully programmable current regulator

for up to four RGB LEDs (12 LEDs total). The device is

ideally powered from a supply rail in the 3V to 5V

nominal range. A 4-wire bus is multiplexed to reduce

the pin-count and PCB traces to the LEDs. Each pin

on the bus integrates a switch to the input voltage and

a programmable low-dropout current sink regulator.

There are four versions: the KTD2052A/C are

defaulted disabled at initial power-up, while the

KTD2052B/D execute an AutoBreathe™ pattern by

default at initial power-up or when reset. The

KTD2052A/B use 0x74 7-bit I2C slave address, while

the KTD2052C/D use 0x75. See the Ordering

Information section.

The I2C control interface is used to set the on/off status

and individual LED currents, as well as adjust the faderate.

An internal flexible pattern generator with

watchdog counter enables set-and-forget pattern

executions, while more complex patterns may be

executed from system firmware via the I2C interface.

BrightExtend™ optionally reduces dropout when the

input voltage is too low for the forward voltage of the

LEDs. Programmable CoolExtend™ prevents

excessive heat when the input voltage, current settings,

and ambient temperature are high.

The KTD2052 is packaged in RoHS and Green

compliant 2mm x 2mm UDFN package.