SLVUBX9 October   2020 TPS2640

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  3. 2Description
  4. 3Schematics
  5. 4General Configurations
    1. 4.1 Physical Access
    2. 4.2 Test Equipment
      1. 4.2.1 Power Supplies
      2. 4.2.2 Meters
      3. 4.2.3 Oscilloscope
      4. 4.2.4 Loads
    3. 4.3 Test Setup
    4. 4.4 Test Procedure
      1. 4.4.1 Preliminary Tests
      2. 4.4.2 Output Voltage Start-Up Time Test
      3. 4.4.3 Current Limit and Fault Responses Test
      4. 4.4.4 Output Short-Circuit Protection Test
      5. 4.4.5 Reverse Polarity Test
        1. 4.4.5.1 Overvoltage Clamp Response
  6. 5EVM Board Assembly Drawings and Layout Guidelines
    1. 5.1 PCB Drawings
  7. 6Bill Of Materials (BOM)

2 Description

The TPS2640EVM enables full evaluation of the TPS2640 devices. The EVM supports HTSOP and QFN versions of the devices on two channels (CH1 and CH2, respectively). Input power is applied at T1 (CH1) and T3 (CH2) while T2 (CH1) and T4 (CH2) provide an output connection to the load. See the schematic in Figure 3-1 and the test setup in Figure 4-1.

S1 and S2 allow U1 and U2 to RESET. A fault (FLTb) indicator is provided by D1 and D7 for CH1 and CH2, respectively. Scaled current for each channel can be monitored at TP5 and TP14 with a scaling factor of
1.5 V / A.

Table 2-1 TPS2640EVM Options and Setting
Part NumberEVM FunctionVIN RangeVIN UVLOVINOVPCurrent LimitOutput OvervoltageSelectable Fault Response
CH1 and CH2CH1 and CH2Minimum SettingMaximum Setting
TPS2640EVM4.2-V to 42-V,
2.23-A Industrial eFuse		4.2 V–42 V18.5 V 34.8V 0.2 A(1)2.23 A38 VAuto retry
Latch off
Circuit Breaker
(1) Minimum programmable current limit can be changed to 0.1 A by changing the R12 and R24 values to 120 kΩ on CH1 and CH2, respectively.