KCC's Quizzes AQQ305 about a mutual exponentiation equation
1. Quote of the month: "A train station is where a train stops. A bus station is where a bus stops. I have a work station on my desk, so..." - unknown
2. Quiz AQQ305 about finding a mutual exponential equation
Good luck, and try to be among the
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September Monthly Blog Quiz! Read the blog, take the quiz, and you could win a gift card
Quiz: How Well Do You Know Adaptive Power Switching?
Is your I/O module overheating? The AD74416H's Adaptive Power Switching (APS) can cut heat dissipation by up to 40% — but how well do you really understand how it works?
Read the blog first: Cooling
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LTC4373
Recommended for New Designs
The LTC4372/LTC4373 are positive high voltage ideal diode controllers that drive an external N-channel MOSFET to replace a Schottky diode. They control...
Datasheet
LTC4373 on Analog.com
Hello support
I was not able to utilize the following circuit. Load pulses were killing Q24 why it happens ( yellow current, green voltage )
Hi HaimL, sorry for the late response.
It looks like you are running AC through an ideal diode in a load switch configuration.
The output capacitance (C45) is being charged and discharged, putting stress on switch FET, Q24.
If you step the load while the output cap is charging, SOA stress is further increased.
This part is mainly used in DC operations.
It's easiest on the switch FET to keep the load off until the output cap is fully charged.
Is the voltage at V_BRIDGE AC?
V_Bridge is voltage after diode bridge ... full wave rectified voltage . the shape is changing depend on the load
There's no waveform of IN, but if it dips under 2.5V, that is outside the part's operating range (GATE charge pump may turn off).
If this was in an ideal diode configuration, this wouldn't be an issue since the body diode of the FET would limit power dissipation.
Since this is a load switch config, VDS across the switch FET isn't clamped. During this time, peak currents are as high as 25A.
I recommend either using an ideal diode config if IN is AC, or converting to DC first before passing through a load switch.
