Use the VIN S+ and VIN S– test points along with
the VOUT S+ and VOUT S– test points located near the power terminal blocks as voltage
monitoring points where voltmeters are connected to measure the input and output voltages,
respectively. Do not use these sense terminals as the input supply or output load
connection points. The PCB traces connected to these sense terminals are not designed
to support high currents.
Header J3 provides access to the following test
points:
VIN
EN
MODE
PG
VCC
SPSP
The MODE test point provides a convenient location to connect an external clock signal.
The power-good (PG) test point is available to monitor when a valid output voltage is
present on the EVM. Refer to EVM Connections for specific information related to the various test
points.
The VOUT SELECT header (J4) allows
selection of either 3.3 V or 5 V. Before applying power to the EVM, make sure that the
jumper is present and properly positioned for the intended output voltage. Always remove
input power before changing the jumper settings.
The FSW SELECT header (J5) allows
selection of a suitable switching frequency:
400 kHz
700 kHz
1 MHz
1.4 MHz
2.2 MHz
Before applying power to the EVM, make sure that the jumper is present and properly
positioned for the intended switching frequency. Always remove input power before changing
the jumper settings.