Intelligent power modules for resonant converters
First Claim
1. A semiconductor package, comprising:
- a power switch being a discrete device and having a control terminal and first and second power terminals;
a freewheeling device being a discrete device, the freewheeling device being connected electrically in parallel to the first and second power terminals of the power switch; and
a controller circuit being a monolithic integrated circuit, the controller circuit having a first output terminal connected to the control terminal of the power switch, a first input terminal receiving an input signal and a second input terminal receiving a feedback signal, the input signal determining an on-period and off-period of the power switch, the controller circuit comprising a normal gate drive circuit for generating a gate drive signal to drive the control terminal of the power switch in response to the input signal and a protection circuit implementing at least one protection function for the power switch,wherein the semiconductor package comprises a first terminal being the first power terminal of the power switch, a second terminal being the second power terminal of the power switch, a third terminal coupled to the first input terminal of the controller circuit, and a fourth terminal coupled to the second input terminal of the controller circuit; and
wherein the protection circuit in the controller circuit comprises a soft-start protection circuit comprising a soft-start gate drive circuit and a soft-start control circuit, the soft-start control circuit being configured to detect a first system input signal pulse following power up of the controller circuit, or following an idle period of the system input signal, or following removal of a fault condition, the soft-start control circuit being configured to turn on the soft-start gate drive circuit to in response to detecting the first system input signal pulse, the soft-start gate drive circuit being configured to drive the power switch with a slowly rising voltage to softly turn on the power switch.
1 Assignment
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Accused Products
Abstract
An intelligent power module includes a power switch, a freewheeling device, and a controller circuit incorporating a gate drive circuit and one or more power switch protection circuits. In one embodiment, the power switch is an insulated gate bipolar transistor (IGBT) device, the freewheeling device is a PN junction diode, and the controller circuit is implemented as a semiconductor integrated circuit (IC). The power module implements protection functions for the power switching device where the protection circuits are formed on the controller circuit IC and co-packaged with the power switch. In some embodiments, the control circuit in the power module includes an active soft-start circuit which is activated to realize soft-start of the power switch. In other embodiments, the control circuit in the power module includes an active turn-on pulse control circuit to detect for abnormal system input signal pulse events and block system undesired input pulses.
22 Citations
21 Claims
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1. A semiconductor package, comprising:
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a power switch being a discrete device and having a control terminal and first and second power terminals; a freewheeling device being a discrete device, the freewheeling device being connected electrically in parallel to the first and second power terminals of the power switch; and a controller circuit being a monolithic integrated circuit, the controller circuit having a first output terminal connected to the control terminal of the power switch, a first input terminal receiving an input signal and a second input terminal receiving a feedback signal, the input signal determining an on-period and off-period of the power switch, the controller circuit comprising a normal gate drive circuit for generating a gate drive signal to drive the control terminal of the power switch in response to the input signal and a protection circuit implementing at least one protection function for the power switch, wherein the semiconductor package comprises a first terminal being the first power terminal of the power switch, a second terminal being the second power terminal of the power switch, a third terminal coupled to the first input terminal of the controller circuit, and a fourth terminal coupled to the second input terminal of the controller circuit; and wherein the protection circuit in the controller circuit comprises a soft-start protection circuit comprising a soft-start gate drive circuit and a soft-start control circuit, the soft-start control circuit being configured to detect a first system input signal pulse following power up of the controller circuit, or following an idle period of the system input signal, or following removal of a fault condition, the soft-start control circuit being configured to turn on the soft-start gate drive circuit to in response to detecting the first system input signal pulse, the soft-start gate drive circuit being configured to drive the power switch with a slowly rising voltage to softly turn on the power switch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor package, comprising:
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a power switch being a discrete device and having a control terminal and first and second power terminals; a freewheeling device being a discrete device, the freewheeling device being connected electrically in parallel to the first and second power terminals of the power switch; and a controller circuit being a monolithic integrated circuit, the controller circuit having a first output terminal connected to the control terminal of the power switch, a first input terminal receiving an input signal and a second input terminal receiving a feedback signal, the input signal determining an on-period and off-period of the power switch, the controller circuit comprising a normal gate drive circuit for generating a gate drive signal to drive the control terminal of the power switch in response to the input signal and a protection circuit implementing at least one protection function for the power switch, wherein the semiconductor package comprises a first terminal being the first power terminal of the power switch, a second terminal being the second power terminal of the power switch, a third terminal coupled to the first input terminal of the controller circuit, and a fourth terminal coupled to the second input terminal of the controller circuit; and wherein the protection circuit in the controller circuit comprises an abnormal turn on disable circuit configured to monitor a deassertion transition of the system input signal, and to block the system input signal from driving the power switch through the normal gate drive circuit for a minimum off duration. - View Dependent Claims (12, 13, 14, 15)
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16. A semiconductor package, comprising:
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a power switch being a discrete device and having a control terminal and first and second power terminals; a freewheeling device being a discrete device, the freewheeling device being connected electrically in parallel to the first and second power terminals of the power switch; and a controller circuit being a monolithic integrated circuit, the controller circuit having a first output terminal connected to the control terminal of the power switch, a first input terminal receiving an input signal and a second input terminal receiving a feedback signal, the input signal determining an on-period and off-period of the power switch, the controller circuit comprising a normal gate drive circuit for generating a gate drive signal to drive the control terminal of the power switch in response to the input signal and a protection circuit implementing at least one protection function for the power switch, wherein the semiconductor package comprises a first terminal being the first power terminal of the power switch, a second terminal being the second power terminal of the power switch, a third terminal coupled to the first input terminal of the controller circuit, and a fourth terminal coupled to the second input terminal of the controller circuit; and wherein the protection circuit in the controller circuit comprises a maximum duty cycle disable circuit configured to monitor a duration of the on period of the system input signal, and to turn off the power switch in response to the duration of the on period exceeding a maximum on duration. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification