App note: Simulating fast transient loads for testing power supplies

in app notes by DP | 0 comments

752Fig01

How to implement a fast load transient simulator for power supply testing. One of important factor of power supplies is how they react to fast changing loads. This article describes how to design a system that measures power supply performance under quickly changing loads.

To obtain fast load transients, we combine a power MOSFET and a couple of resistors right on the PC board of the device under test (DUT). Choosing the components is relatively easy. If the output voltage is positive, an n-channel MOSFET works great. The MOSFET is connected with a resistor from the source to ground (see Figure 1). The MOSFET’s gate is terminated with a 51Ω resistor to impedance-match the signal generator’s output.

This entry was posted in app notes and tagged , .

Leave a Comment

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Notify me of followup comments via e-mail. You can also subscribe without commenting.