Electronic device with shared EOS protection and power interruption mitigation
AssigneeAllegro MicroSystems, LLC
InventorsMaxim Klebanov, Washington Lamar
Life of this patent
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Abstract
In an embodiment, an electronic device comprises a shared electrical over-stress (EOS) protection circuit. The shared EOS protection circuit may be coupled between a power input terminal and ground terminal to provide an EOS current path from the power input terminal to the ground terminal, and coupled between the output terminal and the ground terminal to provide an EOS current path from the output terminal to the ground terminal. The electronic device may also include a power interruption mitigation circuit to provide power to the electronic device during interruptions or fluctuations in external power.
Claims28
An electronic device comprising:
- a power interruption mitigation circuit configured to provide power to the electronic device if the power for the electronic device is interrupted;
- a power input terminal to receive power for the electronic device;
- a power mitigation input terminal to receive power for the power interruption mitigation circuit;
- an output terminal;
- a ground terminal;
- and
- a shared electrical over-stress (EOS) protection circuit comprising a power clamp circuit having:
- one terminal coupled to the power input terminal, the power mitigation input terminal, and the output terminal;
- and
- another terminal coupled directly to the ground terminal to provide a first EOS current path from the power input terminal to the ground terminal, a second EOS current path from the output terminal to the ground terminal, and a third EOS current path from the power mitigation input terminal to the ground terminal;
- wherein the first, second, and third EOS current paths comprise a single shared power clamp circuit.
An electronic device comprising:
- a power interruption mitigation circuit configured to provide power to the electronic device if power to the electronic device is interrupted;
- a first terminal;
- a second terminal;
- a third terminal;
- a power mitigation input terminal to receive power for the power interruption mitigation circuit;
- and
- a shared electrical over-stress (EOS) current path connected between the first terminal and the third terminal, between the second terminal and the third terminal, and between the power mitigation input terminal and the third terminal;
- wherein the shared EOS current path comprises a shared EOS protection circuit including a single power clamp circuit between the terminals.
An apparatus comprising:
- a device package comprising an electronic device, a first terminal to receive power for the electronic device from an external power source, a second terminal, a third terminal, and a power mitigation input terminal;
- a voltage regulator for regulating the power from the external power source;
- a power interruption mitigation circuit comprising an energy storage device coupled to provide power to the voltage regulator during interruption of the power from the external power source, wherein the power mitigation input terminal receives power for the power interruption mitigation circuit;
- and
- a shared EOS protection circuit comprising a single shared power clamp circuit, the shared EOS protection circuit configure to provide a first EOS current path from the first terminal to the third terminal, a second EOS current path from the second terminal to the third terminal, and a third EOS current path from the power input mitigation terminal to the third terminal.
Dependencies are inferred from the claim text.