Texas Instruments TPS92402 LED Dot-Controller
Texas Instruments TPS92402 LED Dot-Controllers enable 8-channel individual lighting solutions by providing up to 2.5A pixel-level LED dimming control with a 4.5V to 65V wide input range. The device includes a string of eight series-connected integrated shunt FETs, each providing PWM dimming for an individual LED. The shunt FET string allows the device to support constant current regulators with either common-anode or common-cathode LEDs.
The Texas Instruments TPS92402 has an internal oscillator for a system clock to enable an integrated PWM generator up to 16-bit with programmable PWM frequency up to 60kHz. The serial peripheral interface (SPI) enables high-speed data transmission and supports daisy chain and star connections. The SPI and optimized pinout allow multiple devices to be connected in a stacking configuration for single-layer PCBs.
The TPS92402 incorporates registers for programming PWM pulse width, slew rate, edge shift, and open voltage of each individual LED in the string and for reporting LED open, LED short, shunt FET open, and thermal warning. The internal charge pump incorporates a spread spectrum feature to enhance EMI performance. The TPS92402 also provides PWM dimming control of constant current regulators and enables multi-channel power savings to increase dimming efficiency, especially in low-brightness conditions.
Features
- 4.5V to 65V wide input range
- LED common anode or cathode connection
- Eight integrated PWM shunt FETs
- 2.5A FET max continuous current
- Internal 32MHz oscillator for PWM generator
- Programmable 16-bit, >20kHz PWM dimming
- SPI interface and adaptive configuration
- Up to 5MHz SPI clock for data transfer
- Star and daisy chain connection
- One device for 8-LED or 2x 4-LED strings
- Stacking up to four devices for 32-LED string
- Enhanced EMI performance
- Programmable PWM slew rate
- Programmable PWM edge shift
- Internal charge pump with spread spectrum
- Full protection features
- LED open detection and protection
- LED short detection
- Shunt FET open detection
- Programmable LED open-voltage
- Thermal warning
- Optional power save mode
- PWM output to control LED drivers
- Low-power standby mode
- VQFN-36 package
Applications
- Stage and photography lighting
- Surgical lighting
- Machine vision and IP camera LED array
- Cold/warm WLED lighting
- 3D printing
- Industrial transportation
Simplified Application
Related Products
Texas Instruments TPS92401 LED Dot-Controllers
4-channel, 5A LED dot controllers with integrated FET and oscillator with 4.5V to 65V input range.