Figure 3-2. TPS7B4255EVM-062 With Current Probes Attached
The user has two options for providing a DC load on the output of the TPS7B4255-Q1. J7 can be used to place
a DC load that flows through the current sense path on the output of the LDO. Alternatively, the J4 (VOUT) and
J10 (GND) banana connectors can be used for external measurements and loading; however, the IOUT loop
does not sense current flowing through these connectors. In cases where very fast transient tests are performed,
ringing may occur on VIN or VOUT as a result of the PCB parasitic inductance. Placing a strip of wire on the
exposed copper in the current path can reduce this ringing. 10 AWG wire can be used as needed. If ringing
persists, install damping networks by adding a series resistor and capacitor in parallel with VIN. Locations where
damping can be installed include C1 and R2, and C15 and R20.
WARNING
Current probe sensors can be tied to GND and must not come into contact with energized
conductors. See the user manual of your current probe for details. If your current probe has this
limitation, use a thin strip of electrical or Kapton
®
tape to isolate the current sense path from the
current probe.
Optional kelvin sense points are provided using the SMA connectors J1 (VIN) and J2 (VOUT).
Setup
8
TPS7B4255EVM-062 Evaluation Module
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