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公开(公告)号：US20210028708A1
公开(公告)日：2021-01-28
申请号：US17018840
申请日：2020-09-11
摘要： A controller to regulate a power converter includes a terminal that receives an enable signal including enable events representative of an output of the power converter. A drive circuit generates a drive signal to control switching of a power switch to control an energy transfer from an input to an output of the power converter. The drive circuit turns on the power switch when an enable event is received in the enable signal. A current limit threshold generator is coupled to the drive circuit to generate a threshold signal. The threshold signal increases in response to the power switch turning off and subsequently decreases. The threshold signal and a time between consecutive enable events are used to modulate the drive signal to regulate the output of the power converter.
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公开(公告)号：US10833590B2
公开(公告)日：2020-11-10
申请号：US16431156
申请日：2019-06-04
IPC分类号： H01L23/495 , H02M3/335 , H01L23/00 , H01L23/552 , H02M7/00 , H01L23/48 , H01L23/28 , H01L23/31 , H01L23/58 , H01L25/065 , H01L25/18 , H04B5/00 , H02M7/217
摘要： An integrated circuit package includes a lead frame and an encapsulation that substantially encloses the lead frame. The lead frame further includes a first conductor comprising a first conductive loop and a second conductor galvanically isolated from the first conductor, proximate to and magnetically coupled to the first conductive loop to provide a communication link between the first and second conductor. The second conductor includes a first conductive portion, a second conductive portion, and a wire coupling together the first conductive portion and the second conductive portion.
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公开(公告)号：US10811977B2
公开(公告)日：2020-10-20
申请号：US16173843
申请日：2018-10-29
摘要： A controller to regulate a power converter includes a terminal coupled to receive an enable signal including enable events representative of an output of the power converter. A drive circuit is coupled to generate a drive signal to control switching of a power switch to control a transfer of energy from an input of the power converter to the output of the power converter. The drive circuit is coupled to turn on the power switch when an enable event is received in the enable signal. A current limit threshold generator is coupled to the drive circuit to generate a current limit threshold signal. The current limit threshold signal varies each switching cycle of the power switch. A time between consecutive enable events in the enable signal is the switching cycle of the power switch.
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公开(公告)号：US10224292B2
公开(公告)日：2019-03-05
申请号：US15788566
申请日：2017-10-19
IPC分类号： H05K7/14 , H01L23/48 , H01L23/495 , H01L23/522 , H04B15/00 , H01L23/31 , H01L23/552 , H01L27/02 , H01L49/02 , H01L23/00
摘要： An integrated circuit package includes a portion of a lead frame disposed within an encapsulation. The lead frame includes a first conductor including a first conductive loop and a third conductive loop disposed substantially within the encapsulation. A second conductor formed in the lead frame is galvanically isolated from the first conductor and includes a second conductive loop disposed substantially within the encapsulation proximate to the first conductive loop to provide a communication link between the first and second conductors. The third conductive loop is wound in an opposite direction relative to the first conductive loop. A transmit circuit is disposed within the encapsulation and is coupled to the second conductor to provide a transmitter current. A receive circuit is disposed within the encapsulation and is coupled to the first conductor to receive a transmitter induced signal in response to the transmitter current.
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公开(公告)号：US10158295B2
公开(公告)日：2018-12-18
申请号：US15795785
申请日：2017-10-27
摘要： A power converter includes an energy transfer element that includes a primary winding and a secondary winding, and is coupled to transfer energy between the primary winding and the secondary winding. An enable circuit is coupled to generate an enable signal in response to a feedback signal falling below a threshold. A controller is coupled to control switching of a power switch coupled to the primary winding to regulate an output of the power converter. The controller includes a drive circuit coupled to output a drive signal in response to the enable signal, and a current limit threshold generator coupled to output a current limit threshold signal to the drive circuit in response to the drive signal. The current limit threshold signal varies in response to a time between events of the enable signal over a range of loads coupled to the output of the power converter.
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公开(公告)号：US09912242B2
公开(公告)日：2018-03-06
申请号：US15363744
申请日：2016-11-29
CPC分类号： H02M3/33507 , H02M1/08 , H02M1/32 , H02M1/36 , H02M3/24 , H02M3/33523 , H02M2001/0009
摘要： A method for regulating an output of a power converter includes receiving a signal at a single terminal of an integrated circuit controller. The signal at the single terminal represents a line input voltage of the power converter during at least a portion of an on time of a power switch. The signal at the single terminal represents an output voltage of the power converter during at least a portion of an off time of the power switch. The power switch is switched in response to the signal to regulate the output of the power converter.
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公开(公告)号：US09837911B2
公开(公告)日：2017-12-05
申请号：US14961575
申请日：2015-12-07
CPC分类号： H02M3/33507 , H02M3/156 , H02M3/335 , H02M2001/0009
摘要： A controller for use in a power converter includes a drive circuit coupled to generate a drive signal to control switching of a power switch to control a transfer of energy from a power converter input to a power converter output. An input for receiving an enable signal including enable events is responsive to the power converter output. The drive circuit is coupled to turn ON the power switch in response to the enable events and turn OFF the power switch in response to a power switch current reaching a current limit threshold. A current limit threshold generator is coupled to receive the enable events and vary the current limit threshold in response to the enable events of the enable signal.
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公开(公告)号：US09762129B2
公开(公告)日：2017-09-12
申请号：US14837877
申请日：2015-08-27
CPC分类号： H02M3/33523 , H02M1/36 , H02M3/156 , H02M3/335 , H02M3/33553
摘要： A power converter controller includes a primary controller coupled to operate in a first mode to control a power switch with a primary switching pattern. A secondary controller is galvanically isolated from the primary controller. The secondary controller is coupled to initiate a transition operation with the primary controller to take control of the power switch with one or more control signals through a communication link. The primary controller is coupled to acknowledge receipt of the one or more control signals to the secondary controller and transition from the first mode to a second mode.
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公开(公告)号：US09742288B2
公开(公告)日：2017-08-22
申请号：US14520142
申请日：2014-10-21
发明人： Balu Balakrishnan , David Michael Hugh Matthews , Vikram Balakrishnan , Roland Sylvere Saint-Pierre , Zhao-Jun Wang , Giao Minh Pham , Qing McIntosh
CPC分类号： H02M3/33507 , H02M3/33592 , H02M2001/0054 , Y02B70/1475 , Y02B70/1491
摘要： A control circuit for use in an isolated power converter includes an output-side first controller having a switch control signal generator and an extremum locator. The switch control signal generator communicates a control signal to a second controller on the input side of the power converter via an isolated interface to initiate a transition of a switch from an OFF state to an ON state. The extremum locator enables the switch control signal generator to communicate the control signal in response to an oscillating voltage signal at an output terminal of the energy transfer element. The extremum locator enables the switch control signal generator such that the transition of the switch from the OFF state to the ON state occurs substantially at a time that the oscillating voltage signal reaches an extremum.
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10.发明授权公开(公告)号：US09735665B2
公开(公告)日：2017-08-15
申请号：US14717620
申请日：2015-05-20
CPC分类号： H02M1/32 , H02M1/12 , H02M1/126 , H02M1/36 , H02M2001/322
摘要： A circuit for use in a power converter includes a control circuit coupled to detect whether an electrical energy source is coupled to an input of the power converter. A switch is coupled to the control circuit, and is coupled to transfer energy from the input of the power converter to an output of the power converter during a first operating mode. The control circuit is coupled to drive the switch in the first operating mode when the electrical energy source is coupled to the input of the power converter. The control circuit is coupled to drive the switch in a second operating mode when the electrical energy source is uncoupled from the input of the power converter to drive the switch to discharge a capacitance coupled between input terminals of the power converter to a threshold voltage in less than a maximum period of time.
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