Patents Assigned to Bel Fuse (Macao Commercial Offshore)
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Patent number: 10756624Abstract: A DC-DC converter suitable for conversion of high input voltages to regulated low output voltages at very high output currents has a cascade of stages including a buck regulation stage, an unregulated switched capacitor voltage doubler, and an unregulated voltage isolation stage. These three stages are merged in a single switching structure so that each stage optimally performs its respective function while also taking advantage of characteristics and features of neighboring stages.Type: GrantFiled: September 12, 2019Date of Patent: August 25, 2020Assignee: Bel Fuse (MACAO COMMERCIAL OFFSHORE) LimitedInventor: Giorgio Augusto Mauri
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Patent number: 10749340Abstract: A power switch includes a bridge-connected switching circuit with (1) a pair of MOSFETs back-to-back in series between line and load connections, an interconnection point of the MOSFETs being a first common connection, and (2) a pair of diodes back-to-back between the line and load connections, an interconnection point of the diodes being a second common connection. A line/load controller has supply inputs connected to the first and second common connections for receiving operating power, and (1) places both MOSFETs in the ON state to deliver normal operating current to the load for normal operation, and (2) places both MOSFETs in the OFF state to deliver (by body diode conduction) a substantially reduced leakage current to the load when the load is not powered for normal operation, the leakage current providing the operating power to the line/load controller.Type: GrantFiled: July 26, 2017Date of Patent: August 18, 2020Assignee: Bel Fuse (MACAO COMMERCIAL OFFSHORE) LimitedInventors: Mark Jutras, Scott Moore, Mark Masera
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Patent number: 10643784Abstract: A filter inductor for high-current applications. The filter inductor includes a magnetic core and a winding. The winding includes a shaped section having opposing ends, a pair of arm sections laterally extending from the opposing ends of the shaped section, respectively, and a pair of inductor pins, each extending perpendicular from an end of a respective arm section. The magnetic core includes a first core portion and a second core portion. The first core portion includes a recessed channel configured to receive the shaped section of the winding. The second core portion includes a pair of recessed regions configured to receive the pair of arm sections of the winding, respectively. The first core portion and the second core portion are coupled in contact to one another to secure the shaped section of the winding within the magnetic core. The filter inductor can be edge-mounted to a printed circuit board.Type: GrantFiled: April 19, 2017Date of Patent: May 5, 2020Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventors: Jianbin Yao, Hai Huang
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Modular jack contact assembly having controlled capacitive coupling positioned within a jack housing
Patent number: 10637196Abstract: A modular jack connector compensates for plug characteristics via a controlled primary compensation in the immediate vicinity of the connector interface. A jack contact assembly is positioned within a jack housing and includes first and second sets of elongate contacts each having a plug contact portion and a signal output portion. Each elongate contact is configured such that their respective plug contact portions are coplanar and a signal path is defined between their plug contact portions and their signal output portions. A flexible circuit board is coupled proximate to the plug contact portions, and configured to provide capacitance compensation between respective contacts engaged thereby, wherein the capacitance compensation is offset from a signal path defined between the plug contact portions and the corresponding signal output portions.Type: GrantFiled: January 28, 2019Date of Patent: April 28, 2020Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventors: Andrew David Baum, Yakov Belopolsky, David Henry Gutter, Derek Imschwseiler, Richard D. Marowsky, Mark Ellis -
Patent number: 10541063Abstract: A power inductor includes a core and winding. The winding has at least two portions, one made of pure copper and the other made of a low-TCR (temperature coefficient of resistance) alloy, wherein the alloy portion is used to form a current sensor. The two portions are joined to provide a unitary winding. The inductor can provide accurate current detection sensor while minimizing total resistance of the winding.Type: GrantFiled: August 10, 2016Date of Patent: January 21, 2020Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventor: Zhao Tang
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Patent number: 10530106Abstract: A modular RJ45-type plug apparatus is provided for forming a connector interface with a connector jack in a high speed data transmission network. A housing comprises an insulative front portion and a conductive shield portion attachable to define an interior, within which is positioned a contact subassembly including a first PCB having cable mounting pads on one end and through holes for elongate plug contacts on the other end. The contacts are connected on one end to the first PCB and on a second end to a second PCB, with bridge portions therebetween collectively defining a jack contact interface. The second PCB comprises desired electrical characteristics which provide the apparatus with certain capacitance compensation properties, wherein the capacitance compensation is offset from a signal path defined between the jack-plug connector interface and the cable pairs.Type: GrantFiled: January 30, 2019Date of Patent: January 7, 2020Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventors: Andrew David Baum, Richard D. Marowsky, David Henry Gutter, Yakov Belopolsky, Jennifer L. Allison, Mark Ellis
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Patent number: 10439329Abstract: A modular connector plug includes controlled capacitances to compensate for near end cross talk at the connector interface created by interaction of signals having signal frequencies in a data transmission bandwidth. A printed circuit board (PCB) is configured to receive cable pairs, and a connector assembly includes first and fourth plug contacts corresponding to the first cable pair and second and third plug contacts corresponding to the second cable pair. First ends of each contact are connected to the PCB, and second ends extend in parallel with each other and transversely to the PCB length, collectively defining a contact interface proximate the contact end. Each contact has a maximum width at the contact interface, with at least one plug contact having a maximum width greater than the maximum width of another plug contact. Each contact accordingly defines an electrode of a compensating capacitance formed between adjacent pairs of plug contacts.Type: GrantFiled: October 18, 2017Date of Patent: October 8, 2019Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventors: Richard D. Marowsky, Yakov Belopolsky, David H. Gutter
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Patent number: 10274980Abstract: A power supply includes power circuitry configured to provide DC power to a separate load, and wireless communication circuitry for wirelessly communicating with an external control device such as a smart phone. A controller is configured to (1) conduct communications with the external control device via the wireless communication circuitry to receive configuration parameters, and (2) incorporate the configuration parameters into a control scheme for operation of the power supply. The power supply may be used with an LED lamp including a series of LEDs, and the configuration parameters establish desired operating characteristics including selection of constant-current or constant-voltage operation, and/or parameters for a dimming curve applied in dimming operation of the LED lamp. The power supply may be used in other applications including battery charging applications.Type: GrantFiled: October 2, 2015Date of Patent: April 30, 2019Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventor: Mark Jutras
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Patent number: 9515558Abstract: A switched-mode power supply in a set of parallel-connected switched-mode power supplies is operated to (1) monitor both output current and operating temperature, and (2) auto-tune an output voltage using two-dimensional control that employs a two-dimensional function of the output current and the operating temperature. The two-dimensional function is a sharing function whose use in each of the supplies effects a coordinated sharing of both load current and operating temperature across the set of supplies. Temperature sharing includes monitoring and controlling distribution of operating temperatures across the set of supplies to reduce undesirable temperature imbalance that can cause excessive thermal stress and reduce reliability.Type: GrantFiled: April 18, 2014Date of Patent: December 6, 2016Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventors: Yanli Zheng, Zhao Tang, Yuanping Zhou, Hongliang Lu
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Patent number: 9502842Abstract: A network interface connector includes a plurality of first and second alternating elongate contacts having contact portions situated in a common plane. The first and second contacts have rearward portions situated in respective first and second spaced parallel planes defining a proximity gap between them. A proximity insert having a particular electrical construction suited for a particular application is situated, preferably in a replaceable manner, in the proximity gap to provide the connector with desired transmission properties.Type: GrantFiled: June 3, 2015Date of Patent: November 22, 2016Assignee: Bel Fuse (Macao Commercial Offshore) Ltd.Inventors: Yakov Belopolsky, David Henry Gutter, Richard D. Marowsky, Mark Ellis
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Patent number: 9337720Abstract: A power converter startup circuit establishes an operating voltage for control circuitry during startup and is then disabled to reduce no-load power dissipation. The startup circuit has a normally on characteristic to automatically provide startup charging current for a startup capacitor. The control circuitry begins operating as the startup capacitor voltage reaches an operating value, and it generates an inhibitory signal that disables the startup circuit to stop the startup charging current and reduce power dissipation. The normally on characteristic is achieved by an emitter switched current source employing a normally on device such as a depletion-mode J-FET. A resistor divider network provides both biasing for the startup current source and a point of monitoring the power supply input voltage during steady state operation.Type: GrantFiled: February 28, 2014Date of Patent: May 10, 2016Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventor: Mark Jutras
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Patent number: 9178433Abstract: A regulated switching power converter generates a converter output having first and second regulated output values under corresponding operating conditions. The converter output transitions between the first and second output values in response to transition of a trigger signal in a transition window between first and second trigger values. A transition step function is based on transition amplitude, transition interval and number of steps, the transition amplitude being a difference between the first and second regulated output values, and the transition interval being a difference between the first and second trigger values. The transition step function generates a step-like transition signal based on values of the trigger signal between the first and second trigger values. During operation in the transition window, the step-like transition signal is included in the regulation reference value to generate a step-like transition of the converter output between the first and second regulated output values.Type: GrantFiled: September 17, 2013Date of Patent: November 3, 2015Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventors: Mark Jutras, Mark Masera
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Patent number: 9124101Abstract: A power supply includes signaling circuitry coupled to output terminals for engaging in bidirectional communications with a load. A controller is capable of conducting the bidirectional communications and selecting among different operating modes for the power supply based on the communications. The modes may include a constant-current mode suitable for applications such as battery charging and power LED lamps, and a constant-voltage mode suitable for a variety of conventional uses such as powering electronic circuitry. The signaling circuitry may include a power switching transistor in series with the load, which is pulsed in a binary fashion to transmit communications to the load. A signal-forming resistor in parallel with the power switching transistor develops a signaling voltage monitored by the controller to receive communications from the load.Type: GrantFiled: March 31, 2014Date of Patent: September 1, 2015Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventors: Mark Jutras, Scott Moore
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Publication number: 20150194875Abstract: A power converter startup circuit establishes an operating voltage for control circuitry during startup and is then disabled to reduce no-load power dissipation. The startup circuit has a normally on characteristic to automatically provide startup charging current for a startup capacitor. The control circuitry begins operating as the startup capacitor voltage reaches an operating value, and it generates an inhibitory signal that disables the startup circuit to stop the startup charging current and reduce power dissipation. The normally on characteristic is achieved by an emitter switched current source employing a normally on device such as a depletion-mode J-FET. A resistor divider network provides both biasing for the startup current source and a point of monitoring the power supply input voltage during steady state operation.Type: ApplicationFiled: February 28, 2014Publication date: July 9, 2015Applicant: BEL FUSE (MACAO COMMERCIAL OFFSHORE) LIMITEDInventor: Mark Jutras
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Patent number: 8901774Abstract: A power supply system includes a digital power manager and multiple power blocks each conveying regulated power to a respective load. The power blocks include the power part of non-isolated DC/DC converters, signal sampling and conversion circuits to provide analog voltage signal representing output voltage, output current, temperature, etc., and driving circuits to receive pulse width modulation (PWM) signals and drive switching devices. Closed-loop voltage control and protection functions for the power blocks are integrated into the digital power. The digital power manager includes a non-volatile memory containing registers, including a digital power manager configuration register, a power block set-up register, and a power block monitor register, as well as a user-definable space.Type: GrantFiled: March 10, 2011Date of Patent: December 2, 2014Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventors: Jiajia Yan, Yuanping Zhou, Huajun Jian, Mark Jutras
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Publication number: 20140312857Abstract: A switched-mode power supply in a set of parallel-connected switched-mode power supplies is operated to (1) monitor both output current and operating temperature, and (2) auto-tune an output voltage using two-dimensional control that employs a two-dimensional function of the output current and the operating temperature. The two-dimensional function is a sharing function whose use in each of the supplies effects a coordinated sharing of both load current and operating temperature across the set of supplies. Temperature sharing includes monitoring and controlling distribution of operating temperatures across the set of supplies to reduce undesirable temperature imbalance that can cause excessive thermal stress and reduce reliability.Type: ApplicationFiled: April 18, 2014Publication date: October 23, 2014Applicant: BEL FUSE (MACAO COMMERCIAL OFFSHORE) LIMITEDInventors: Yanli ZHENG, Zhao TANG, Yuanping ZHOU, Hongliang LU
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Publication number: 20140292297Abstract: A power supply includes signaling circuitry coupled to output terminals for engaging in bidirectional communications with a load. A controller is capable of conducting the bidirectional communications and selecting among different operating modes for the power supply based on the communications. The modes may include a constant-current mode suitable for applications such as battery charging and power LED lamps, and a constant-voltage mode suitable for a variety of conventional uses such as powering electronic circuitry. The signaling circuitry may include a power switching transistor in series with the load, which is pulsed in a binary fashion to transmit communications to the load. A signal-forming resistor in parallel with the power switching transistor develops a signaling voltage monitored by the controller to receive communications from the load.Type: ApplicationFiled: March 31, 2014Publication date: October 2, 2014Applicant: BEL FUSE (MACAO COMMERCIAL OFFSHORE) LIMITEDInventors: Mark Jutras, Scott Moore
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Patent number: 8581565Abstract: A DC/DC converter for use in power supply applications employing multiple parallel-connected converters employs a digital controller referenced to the secondary or output side of an isolation boundary and having non-isolated direct connections to secondary side components. The controller directly monitors output voltage and output current and uses feedback control techniques to precisely control these values in a desired manner. The DC/DC converter can implement so-called “droop” current sharing with increased accuracy arising from the secondary-side digital control, so that a desired balanced sharing of current across multiple converters can be achieved. The converter uses calibration establish accurate set points, and any of a variety of additional functions/features to attain operational goals.Type: GrantFiled: April 23, 2012Date of Patent: November 12, 2013Assignee: Bel Fuse (Macao Commercial Offshore) LimitedInventors: Zhao Tang, Jia Deng, Yuanping Zhou, Hongliang Lu, Mark Jutras
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Publication number: 20130188399Abstract: A DC/DC converter for use in power supply applications employing multiple parallel-connected converters employs a digital controller referenced to the secondary or output side of an isolation boundary and having non-isolated direct connections to secondary side components. The controller directly monitors output voltage and output current and uses feedback control techniques to precisely control these values in a desired manner. The DC/DC converter can implement so-called “droop” current sharing with increased accuracy arising from the secondary-side digital control, so that a desired balanced sharing of current across multiple converters can be achieved. The converter uses calibration establish accurate set points, and any of a variety of additional functions/features to attain operational goals.Type: ApplicationFiled: April 23, 2012Publication date: July 25, 2013Applicant: BEL FUSE (MACAO COMMERCIAL OFFSHORE) LIMITEDInventors: Zhao TANG, Jia DENG, Yuanping ZHOU, Hongliang LU, Mark JUTRAS
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Patent number: 8395329Abstract: A power supply for an LED lamp has a set of coupled coils, primary-side power circuitry including a converter power switch for conducting input power, and secondary-side power circuitry including a dimming power switch. Power control circuitry includes converter control circuitry which generates a converter control signal for the converter power switch to maintain a desired undimmed level of lamp current at a normal operating value of a lamp voltage. Dimming control circuitry generates a dimming control signal for the dimming power switch to pulse-width modulate the lamp current at a duty cycle corresponding to a desired dimming. Operation of the converter control circuitry is modified during dimming to prevent an automatic increase of the lamp voltage in response to a decrease in lamp current, avoiding undesirable overshooting of the lamp current and providing more accurate and effective control over dimming operation.Type: GrantFiled: August 26, 2010Date of Patent: March 12, 2013Assignee: Bel Fuse (Macao Commercial Offshore)Inventors: Mark Jutras, Mark Masera, Scott Moore