SLUUCC4A October   2020  – September 2021 TPS92520-Q1

 

  1.   Trademarks
  2.   General Texas Instruments High Voltage Evaluation (TI HV EMV) User Safety Guidelines
  3. 1Description
    1. 1.1 Typical Applications
    2. 1.2 Warnings
    3. 1.3 Connector Description
  4. 2Performance Specifications
  5. 3Performance Data and Typical Characteristic Curves
    1. 3.1 1.5A CC BUCK SW-Node Voltage Waveform
    2. 3.2 Start-up Waveforms
    3. 3.3 PWM Dimming
  6. 4Schematic, PCB Layout, and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Layout
    3. 4.3 Bill of Materials
  7. 5Software
    1. 5.1 Demonstration Kit Software Installation for LEDMCUEVM-132 Board
      1. 5.1.1 Installation Overview
    2. 5.2 Step-by-Step Installation Instructions
    3. 5.3 Installation Error Recovery
    4. 5.4 Checking for Updates
  8. 6TPS92520EVM-133 Power Up and Operation
    1. 6.1 Power Up and Operation at VINx < 40 V
    2. 6.2 MCU Control Window
    3. 6.3 SPI Command Window
    4. 6.4 Watchdog Window
    5. 6.5 GUI Devices Window
      1. 6.5.1 Channel 1 or 2 Sub-Window: Settings, Measurements, and Faults
      2. 6.5.2 Device Sub-Window: Shared Device Settings, Measurements, Register Info, and Limp Home
    6. 6.6 Limp Home Mode Window
  9. 7Revision History

6 TPS92520EVM-133 Power Up and Operation

To start the EVM operation, connect the header J9 on TPS92520EVM-133 to the header J9 on the LEDMCUEVM-132, and the header J3 to the header J6, as shown in Figure 6-1.

GUID-20200810-CA0I-XKPR-CB6T-VT5RPRVSSKVD-low.gifFigure 6-1 LEDMCUEVM-132 Connection to TPS92520EVM-133

Apply power (48 V) to the TPS9250EVM-133 board (terminal J1). Connect a resistive or a current sink load such as LEDs or diodes to the output of the EVM (terminal J2). The load must not exceed maximum output current of 1.6 A and the maximum output power of 120 W for two-channel operation. The following steps then provide the necessary setup to enable and turn on the TPS92520EVM-133.

The TPS92520EVM-133 board is setup such that the onboard linear regulator's (U2) input is connected to VIN through J11 and a series zener diode (D3) which reduced the input voltage to the linear's input below 40 V at a VIN of 65 V. The zener helps spread power dissipation between the linear and the zener and protects the linear from being exposed to voltages greater than 40 V.