SNVU821 November   2023 TPS92642-Q1

 

  1.   1
  2.   TPS92642EVM-203 5-A Synchronous Buck IR LED Driver Evaluation Module
  3.   Trademarks
  4. 1Introduction
  5. 2Warnings and Cautions
  6. 3Description
    1. 3.1 Typical Applications
    2. 3.2 Features
    3. 3.3 Connector and Test Point Description
    4. 3.4 Electrical Performance Specifications
  7. 4Test Setup
    1. 4.1 Input Supplies and LED Load Connections
    2. 4.2 Pulse Duty Cycle Limit (PLMT) Control
    3. 4.3 Analog Dimming Using IADJ
    4. 4.4 PWM Dimming Using nExt_PWM Test Points
    5. 4.5 Switching Frequency Set Point Using RON
  8. 5Performance Data and Typical Characteristic Curves
    1. 5.1 Efficiency
    2. 5.2 Analog Dimming
    3. 5.3 PWM Dimming
    4. 5.4 PWM Dimming Waveforms
  9. 6Schematic
  10. 7PCB Layout
  11. 8Bill of Materials

3.4 Electrical Performance Specifications

Table 3-3 lists the EVM electrical performance specifications. This configuration is designed for driving up to 5 A for 1 to 2 LEDs with an input voltage range of 20 V to 26 V (24-V nominal). This configuration is also designed to operate at approximately 2.1 MHz for optimized size. The device can operate at lower input voltage, but this EVM is setup to meet the following parameters.

Table 3-3 TPS92642EVM-203 Performance Specifications
Parameter Description Min Typ Max Units
Input Characteristics
Voltage, VIN 22 24 26 V
Maximum input current, IIN 4.0 A
Output Characteristics
Output voltage, VOUT This EVM was tested with 1 to 2 LEDs that had a voltage range of 3.0 V to 7.0 V for a current range of 0.3 A to 5.0 A VIN + 3 V 30 V
Maximum output current, IOUT Total output current is designed for 0.3 A to 5.0 A 5.0 A
Maximum output power, POUT Total output power 27 W
Systems Characteristics
Switching frequency RON = 41.2 kΩ 2.1 MHz
Peak efficiency 96 %
Operating temperature Maximum temperature range is based on total power dissipation –40 25 125 °C