Voltage transient protection circuitry
First Claim
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1. A voltage transient protection circuit in a configuration comprising:
- a bridge circuit having a high-side device operably coupled to a power supply and a gate drive, the bridge circuit also having and a low-side device operably coupled to ground and a gate drive;
the bridge circuit also having an output node;
a voltage reference circuit operably coupled by a switch to the gate of the high-side device; and
a load to ground circuit operably coupled to the output node;
whereby the high-side device may be operated under selected voltage conditions and deactivated in the event of a selected high voltage condition, such that the output node is held at a selected voltage level.
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Abstract
Disclosed are advances in the arts with novel and useful voltage transient protection circuitry in configurations which include a bridge circuit in combination with one or more voltage reference, load to ground circuit, and/or snub circuit such that the output node is held at a selected voltage level, preferably mid-rail, and potentially damaging transient voltages are avoided.
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Citations
25 Claims
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1. A voltage transient protection circuit in a configuration comprising:
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a bridge circuit having a high-side device operably coupled to a power supply and a gate drive, the bridge circuit also having and a low-side device operably coupled to ground and a gate drive; the bridge circuit also having an output node; a voltage reference circuit operably coupled by a switch to the gate of the high-side device; and a load to ground circuit operably coupled to the output node; whereby the high-side device may be operated under selected voltage conditions and deactivated in the event of a selected high voltage condition, such that the output node is held at a selected voltage level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 17)
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13. A voltage transient protection circuit in a configuration comprising:
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a bridge circuit having a high-side device operably coupled to a power supply and a first gate drive, the bridge circuit also having and a low-side device operably coupled to ground and a second gate drive; the bridge circuit also having an output node; and a voltage reference circuit operably coupled by a switch to the output node; whereby the voltage reference circuit is configured to be operated under selected voltage conditions and deactivated in the event of a selected high voltage condition, such that the output node is held at a selected voltage level. - View Dependent Claims (14, 15, 16, 18, 19, 20)
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21. A voltage transient protection circuit in a configuration comprising:
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a bridge circuit having a high-side device operably coupled to a power supply and a first gate drive, the bridge circuit also having and a low-side device operably coupled to ground and a second gate drive; the bridge circuit also having an output node; a voltage reference circuit operably coupled by a switch to a gate of the high-side device, whereby the high-side device is configured to be operated under first selected voltage conditions and deactivated in the event of a selected high voltage condition; and a low-side snub circuit operably coupled between a gate of the low-side device and the output node, whereby the low-side device is configured to be operated under second selected voltage conditions and deactivated in the event of a selected low voltage condition; wherein a deadband voltage region is provided such that neither the high-side device nor the low-side device operates. - View Dependent Claims (22, 23, 24, 25)
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Specification
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Current AssigneeTriune Systems, LLC (Semtech Corporation)
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Original AssigneeTriune Systems, LLC (Semtech Corporation)
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InventorsChen, Wayne T., Teggatz, Ross E., Smith, Brett
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Primary Examiner(s)Tran, Thienvu
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Assistant Examiner(s)Comber, Kevin J
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Application NumberUS13/540,902Publication NumberTime in Patent Office1,281 DaysField of Search361/111US Class Current1/1CPC Class CodesH02H 3/22 of short duration, e.g. lig...
