SLUUBM0D May   2017  – October 2020 TPS92518 , TPS92518-Q1 , TPS92518HV , TPS92518HV-Q1

 

  1.   Trademarks
  2. 1Description
    1. 1.1 Typical Applications
    2. 1.2 Connector Description
  3. 2Performance Specifications
  4. 3Performance Data and Typical Characteristic Curves
    1. 3.1 Startup Waveforms
      1. 3.1.1 Startup After SPI Enable Command
      2. 3.1.2 Startup on Hardware Enable Pin Transition
    2. 3.2 Shutdown Waveforms
      1. 3.2.1 Shutdown After SPI Disable
      2. 3.2.2 Shutdown After Hardware Enable Pin Transition
    3. 3.3 Current Sharing
    4. 3.4 Diode and Boot Capacitor Current
      1. 3.4.1 Diode, Inductor, and Boot Capacitor Current at Low Output Current
      2. 3.4.2 Diode, Inductor, and Boot Capacitor Current at High Output Current
      3. 3.4.3 Shunt FET Dimming
      4. 3.4.4 Undervoltage Lockout Description
  5. 4Schematic, PCB Layout, and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Layout
    3. 4.3 Bill of Materials
  6. 5Software
    1. 5.1 TPS92518 Demonstration Kit Software Installation
      1. 5.1.1 Windows 10
  7. 6Use of LEDSPIMCUEVM-879 Microcontroller Board for SPI Communications with the TPS92518
  8. 7Revision History

1.1 Typical Applications

This manual outlines the operation and implementation of the TPS92518 as a dual-channel LED current regulator with the specifications listed in Table 2-1. For applications with a different input voltage range or different output voltage range, refer to the TPS92518 data sheet (SLUSCR7). The TPS92518EVM-878 evaluation board is designed to be controlled by a TI microcontroller board, part number LEDSPIMCUEVM-879, available separately, although it can be controlled by any SPI-capable control system. Note that the TPS92518x supports a means to enable the part without SPI communication. By applying a voltage above the second threshold level, 23.6 V typical, on the ENABLE pin, the state of the LEDxEN register is bypassed. This allows a TPS92518 to be powered and operated using the default register values (for details, refer to the TPS92518 data sheet (SLUSCR7)).