TIDUEW9 April   2020

 

  1.    Description
  2.    Resources
  3.    Features
  4.    Applications
  5.    Design Images
  6. 1System Overview
    1. 1.1 Key System Specifications
    2. 1.2 Block Diagram
    3. 1.3 Top Side Pump
    4. 1.4 LED Driver Input Signals
    5. 1.5 LED Driver SDIM/UDIM Settings
    6. 1.6 TPS92641 Board Description
    7. 1.7 Setting the LED Current and Analog Dimming
    8. 1.8 PWM Dimming
  7. 2LED Driver Key Parameters
    1. 2.1 Enable and Disable Delay
    2. 2.2 Rise and Fall Time
    3. 2.3 Ripple
    4. 2.4 Performance Parameters
    5. 2.5 LED Load Capacitor for Rise/Fall Time
    6. 2.6 LED Load Capacitor And Audible Noise
      1. 2.6.1 Layout Considerations
      2. 2.6.2 Electrolytic capacitor considerations
      3. 2.6.3 Standoff Capacitors
    7. 2.7 LED Driver Calculator Tool
  8. 3Layout
  9. 4Related Documentation
    1. 4.1 Trademarks
    2. 4.2 Third-Party Products Disclaimer

1.1 Key System Specifications

Table 1 provides a summary of the TPS92641EVM performance specifications. All specifications are given for an ambient temperature of 25°C.

Table 1. Driver Electrical Performance Specifications

PARAMETER NOTES AND CONDITIONS MIN TYP MAX UNIT
VIN Input Voltage 40 48 V
VOUT Top Side Pump Configuration for Green Channel 14.2 15.6 V 31.6 V V
ILED 1.5 10 A
Buck Regulator Fsw 766 KHz
Dimming 50:1
Enable Delay 7 60 uS
LED Rise Time Based on load Capacitors value 4 uS
LED Fall Time Based on load Capacitors value 0.3 uS