SLVUBP9A December   2020  – May 2021 TPSM41625

 

  1.   Trademarks
  2. 1EVM Setup
  3. 2EVM Connectors and Test Points
  4. 3Test Results
  5. 4PCB Layouts
  6. 5Schematics
  7. 6Bill of Materials
  8. 7Revision History

1 EVM Setup

Figure 1-1 highlights the user interface items associated with the EVM. The PVIN Power terminal block (J5) is used for connection to the host input supply and the VOUT Power terminal block (J3) is used for connection to the load. Terminal block J5 accepts up to a 10-AWG wire, J6 to a 14-AWG, and J3 & J4 accept up to a 6-AWG wire.

GUID-20201120-CA0I-VBNQ-5KBB-VHNG84TDL2LG-low.gif Figure 1-1 EVM User Interface
  • The PVIN S+ and PVIN S- input voltage test points as well as the RS+ and RS- output voltage test points, located near the power terminal blocks are intended to be used as voltage monitoring points where voltmeter scan be connected to measure PVIN and VOUT. Do not use these S+ and S- monitoring test points as the input supply or output load connection points. The PCB traces connecting to these test points are not designed to support high currents.
  • The PVIN Scope (J2) and VOUT Scope (J1) sockets can be used to monitor PVIN and VOUT waveforms with an oscilloscope. These test points are intended for use with un-hooded scope probes outfitted with a low inductance ground lead (ground spring) mounted to the scope probe barrel. The two sockets of each test point are on 0.1 inch centers. The scope probe tip should be inserted into the socket marked with a + sign, and the scope ground lead should be inserted into the other socket.
  • The control test points located around the device are made available to test the features of the device. Refer to the Section 2 for more information on the individual control test points. Other features, such as UVLO (R10, R13), ILIM (R12), SS (R15) and MODE (R29) can be altered by manually adding or changing the value on the associated footprints for each component located on the bottom-side of the EVM.
  • The VREF jumper (J11), VOUT jumper (J12), FSW jumper (J13), and the RAMP jumper (J8) are provided for selecting the internal reference voltage, switching frequency, desired output voltage, and appropriate RAMP setting. Before applying power to the EVM, make sure that the jumpers are present and properly positioned for the intended output voltage. Ensure to set the internal reference voltage prior to selecting the desired output voltage (selecting the highest reference voltage will result in the most accurate output voltage set point). Refer to Table 1-1 and Table 1-2 for the recommended jumper settings.
Table 1-1 PVIN = 5 V Recommended Jumper Settings
OUTPUT VOLTAGE VREF SELECT (J11) VOUT SELECT (J12) FSW SELECT (J13) RAMP (J8)
0.6 V - 7.5 V 0.6 V - 0.75 V VREF 500 kHz 187 kΩ
700 kHz - 1 MHz 78.7 kΩ
0.8 V - 0.95 V 0.8 V - 0.95 V VREF 500 kHz - 700 kHz 78.7 kΩ
1 MHz 78.7 kΩ
1 V - 1.1 V 1 - 1.1 V VREF 400 kHz - 1 MHz 187 kΩ
1.2 V 1.1 V 1.2 V 400 kHz - 1 MHz 187 kΩ
1.8 V 1.1 V 1.8 V 400 kHz - 1 MHz 187 kΩ
3.3 V 1.1 V 3.3 V 400 kHz - 1 MHz 78.7 kΩ
Table 1-2 12 V Recommended Jumper Settings
OUTPUT VOLTAGE VREF SELECT (J11) VOUT SELECT (J12) FSW SELECT (J13) RAMP (J8)
0.6 V - 7.5 V 0.6 V - 0.75 V VREF 400 kHz - 700 kHz 78.7 kΩ
0.8 V - 0.95 V 0.8 V - 0.95 V VREF 500 kHz - 700 kHz 78.7 kΩ
1 V - 1.1 V 1 - 1.1 V VREF 400 kHz - 1 MHz 78.7 kΩ
1.2 V 1.1 V 1.2 V 500 kHz 187 kΩ
700 kHz - 1 MHz 121 kΩ
1.8 V 1.1 V 1.8 V 500 kHz 187 kΩ
700 kHz - 1 MHz 78.7 kΩ
3.3 V 1.1 V 3.3 V 700 kHz - 1 MHz 187 kΩ
5.0 V 1.1 V 5.0 V 700 kHz - 1 MHz 187 kΩ

For example, if an output voltage of 1.8 V is desired and is supplied by a 12-V input, then a proper configuration is as follows:

  1. Set VREF (J11) as 1.1 V.
  2. Set VOUT (J12) as 1.8 V.
  3. Set FSW (J13) as 500 kHz, 700 kHz, or 900 kHz.
  4. Set RAMP (J8) as 187 kΩ if 500 kHz has been selected, or set RAMP as 78.7 kΩ if 700 kHz or 900 kHz has been selected.

Another example, if an output voltage of 1.0 V is desired and is supplied by a 12-V input, then a proper configuration is as follows:

  1. Set VREF (J11) as 1.0 V.
  2. Set VOUT (J12) as VREF.
  3. Set FSW (J13) as 500 kHz, 700 kHz, or 900 kHz.
  4. Set RAMP (J8) as 78.7 kΩ