Kinetic Technologies KTD2052 12-Channel RGB LED Drivers
Kinetic Technologies KTD2052 12-Channel RGB LED Drivers are 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. The I2C control interface is used to set the on/off status and individual LED currents and adjust the fade rate. An internal flexible pattern generator with a watchdog counter enables set-and-forget pattern executions, while more complex patterns may be executed via the I2C interface from system firmware.
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. 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 Kinetic Technologies KTD2052 is packaged in a RoHS and Green compliant 2mm x 2mm UDFN package.
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
- 125µA to 24mA in 125µA steps LED current
- 8µA to 1.5mA in 8µA steps night-mode
- 5% max. current accuracy and 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)
- Patented 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
- Artificial Intelligence (AI) smart loudspeakers
- IoT, gaming keyboards/controllers/VR, robots, indicator/button lighting
- BLUETOOTH®/WiFi loudspeakers
- Automotive panel, accent, and mood lighting
Applications Diagram
Related Development Tools
Kinetic Technologies KTD2052 Evaluation Kit
Demonstrates and evaluates the KTD2052 RGB LED Drivers functionality, performance, and PCB layout.