Posts Tagged ‘Circuit Protection’
The MAX6499 comprises undervoltage and overvoltage comparators for window detection. WHen the monitored voltage is within selected “window”, GATE is enhances and the n-channel MOSFET is on. GATE falls to OUTFB when the monitored voltage falls below the lower limit (V triplow) or exceeds the upper limit (Vtriphigh) of the window, turning off the MOSFET. …
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The MAX6495–MAX6499 feedback path consist of IN, OVSET’s internal comparator, the internal gate charge pump, and the external n-channel MOSFET when working in overvoltage mode, resulting in a switch-on/off function.
The internal fast comparator turns off the external MOSFET, clamping GATE to OUTFB within 0.5us and disconnecting the power source from the load when the programmed …
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To protect downstream circuits from overvoltage conditions that show up during load-dump events or transients, we can use the MAX6495–MAX6499/MAX6397/MAX6398 overvoltage protection (OVP) devices. Here’s the circuit diagram:
This devices work by controlling an n-channel MOSFET wired in series with the power rail. The gate pulls low and the MOSFET shuts off, disconnecting …
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This is a circuit of discrete overvoltage protector for automotive application. There are two basic thing that must be done by protection circuit. They are prevent voltages greater than the maximum allowable from being applied to the IC pins and the protection circuit not to intrude on the normal function of the circuit. Beside that, …
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This a high-side current amplifier circuit breaker. The circuit-breaker application is possible for that device because the latching-comparator output (COUT1) on the MAX4373, a high-side current-sense amplifier with reference and comparator. Here is the circuit :
This circuit uses MAX4373FESA as a circuit-breaker threshold of 900mA, because its gain from sense resistor to output is 50V/V. …
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