• Input voltage operating range 4.5 V to 40 V
• Three high-precision current sinks
  • Current matching 1% (typical)
  • LED String current up to 100 mA per channel
  • Outputs can be combined externally for higher current capability
• High dimming ratio of 10 000:1 at 100 Hz
• Integrated boost/SEPIC for LED string power
  • Output voltage up to 45 V
  • Switching frequency 300 kHz to 2.2 MHz
  • Switching synchronization input
  • Spread spectrum for lower EMI
• Extensive fault detection features
  • Fault output
  • Input voltage OVP, UVLO, and OCP
  • Open and shorted LED fault detection
  • Thermal shutdown
• Minimum number of external components
  Simplified Schematic

• Industrial backlighting systems in control panels
• Industrial PC
• Test and measurement equipment

The TPS61193 is a high-efficiency, low-EMI, easy-to-use LED driver with flexibility to support a wide range of applications. It has three high-precision current sinks that can be combined for higher current capability.

The TPS61193 has an integrated DC-DC supporting both boost and SEPIC mode operation. The converter has adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions. For EMI control the DC-DC converter supports spread spectrum for switching frequency and an external synchronization with dedicated pin.

The TPS61193 has wide input voltage range from 4.5 V to 40 V for robust support of different types of applications. The TPS61193 integrates extensive fault detection features. The device supports PWM brightness dimming ratio of 10 000:1 for 100-Hz input PWM frequency.

System Efficiency