TI TPS922054DRRR

The TPS92205x family is a 2-A / 4-A nonsynchronous Buck LED driver with 4.5-V to 65-V wide input range. By integrating the low-side NMOS switch, the device is capable of driving LEDs as well as charging batteries with high power density and high efficiency. The family also supports common anode connection and single layer PCB design. The switching frequency is configurable from 100 kHz to 2.2 MHz with optional spread spectrum feature for better EMI performance. The TPS92205x family supports four dimming options, including analog, PWM, hybrid and flexible dimming. Each dimming method can be configured through the PWM and ADIM input pins by means of simple high and low signals. The family adopts an adaptive off-time current mode control along with smart and accurate sampling to enable inductive fast dimming (IFD) and achieve high dimming accuracy. The TPS92205x family also provides multiple systematic protections, including LED open and short, sense resistor open and short, configurable thermal foldback and thermal shutdown. A Fault output sends out acknowledge signals as soon as any fault condition is detected.

• 4.5-V to 65-V wide input range
• LED common anode connection
• Integrated 150-mΩ MOSFET with typical 3-A / 6-A current limit
• Optional switching frequency: 100 kHz to 2.2 MHz
• Spread spectrum for TPS922053 and TPS922055
• Advanced dimming options: Analog dimming (256:1) Fast PWM dimming (150-ns pulse width) Hybrid and flexible dimming (2,000:1 at 20-kHz PWM, 10,000:1 at 4-kHz PWM, 1,000,000:1 at 120-Hz PWM)
• CC / CV charging mode
• Full protection features: LED open and short protection Switching FET open and short protection External component failure protection Cycle-by-cycle current limit Thermal shutdown Fault output (open drain)
• Configurable thermal foldback curve
• VSON, WSON and SOT23 package options

• Constant illumination:
  • Indoor, outdoor, professional lighting
  • Medical, surgical lighting
  • Projector, laser TV, printer, IP camera
• Instant illumination: Machine vision, camera flash Fire alarm, strobe
• CC and CV source:
  • LCD backlighting Battery charging TEC control