• 4.5V to 65V wide input range
• LED common anode or cathode connection
• 4 integrated PWM shunt FETs
  • 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
  • Stacking up to 4 devices for 16-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
• Package: VQFN-36

• Stage and Photography Lighting
• Surgical Lighting
• Machine Vision and IP Camera LED Array
• Cold/Warm WLED Lighting
• 3D Printing
• Industrial Transportation

The TPS92401 LED dot-controller device enables 4-channel individual lighting solutions by providing up to 5A pixel-level LED dimming control with 4.5V to 65V wide input range. The device includes a string of 4 series-connected integrated shunt FETs, each of which providing PWM dimming for an individual LED. The shunt FET string allows the device to support constant current regulators with either commmon-anode or common-cathode LEDs.

The TPS92401 has an internal oscillator for a system clock to enable 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 both daisy chain and star connections. The SPI and optimized pinout allow multiple devices connected in stacking configuration for single-layer PCBs.

The TPS92401 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 spread spectrum feature to enhance EMI performance. The TPS92401 also provides PWM dimming control of constant current regulators and enables multi-channel power save to significantly increase dimming efficiency especially in low brightness condition.

Simplified Application