Patents by Inventor Chuck Wong
Chuck Wong has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10148107Abstract: A universal serial bus charger comprises a universal serial bus connector for providing a connection to a voltage source. An output voltage connector provides a charging voltage to a connected battery. A switching voltage regulator generates the charging voltage responsive to the voltage source. Control circuitry monitors an actual charging current applied to the connected battery and provides a programmed current signal enabling the actual charging current to operate at a programmed level if the actual charging current does not exceed a programmed charging current level. The control circuitry provides a charging current limit signal enabling the actual charging current to operate at a predetermined charge current limit if the actual charging current exceeds the programmed charging current level. PWM control circuitry generates switching control signals to control operation of the switching voltage regulator responsive to the control circuitry.Type: GrantFiled: August 17, 2015Date of Patent: December 4, 2018Assignee: INTERSIL AMERICAS LLCInventor: Chuck Wong
-
Publication number: 20150357849Abstract: A universal serial bus charger comprises a universal serial bus connector for providing a connection to a voltage source. An output voltage connector provides a charging voltage to a connected battery. A switching voltage regulator generates the charging voltage responsive to the voltage source. Control circuitry monitors an actual charging current applied to the connected battery and provides a programmed current signal enabling the actual charging current to operate at a programmed level if the actual charging current does not exceed a programmed charging current level. The control circuitry provides a charging current limit signal enabling the actual charging current to operate at a predetermined charge current limit if the actual charging current exceeds the programmed charging current level. PWM control circuitry generates switching control signals to control operation of the switching voltage regulator responsive to the control circuitry.Type: ApplicationFiled: August 17, 2015Publication date: December 10, 2015Inventor: Chuck Wong
-
Patent number: 9166429Abstract: A universal serial bus charger comprises a universal serial bus connector for providing a connection to a voltage source. An output voltage connector provides a charging voltage to a connected battery. A switching voltage regulator generates the charging voltage responsive to the voltage source. Control circuitry monitors an actual charging current applied to the connected battery and provides a programmed current signal enabling the actual charging current to operate at a programmed level if the actual charging current does not exceed a programmed charging current level. The control circuitry provides a charging current limit signal enabling the actual charging current to operate at a predetermined charge current limit if the actual charging current exceeds the programmed charging current level. PWM control circuitry generates switching control signals to control operation of the switching voltage regulator responsive to the control circuitry.Type: GrantFiled: April 23, 2009Date of Patent: October 20, 2015Assignee: Intersil Americas LLCInventor: Chuck Wong
-
Patent number: 7830115Abstract: A cradle charging system comprises a charging cradle defining a space for a battery of an electronic device. Transformer charging circuitry for charging the battery in the electronic device includes a primary side circuitry for receiving a charging voltage. Secondary side circuitry inductively couples the charging voltage to the battery. The secondary side circuitry provides a controlled output signal based on either constant voltage control or constant current control responsive to a charge level of the battery.Type: GrantFiled: September 17, 2007Date of Patent: November 9, 2010Assignee: Intersil Americas Inc.Inventor: Chuck Wong
-
Publication number: 20100052620Abstract: A charging circuit included on a single integrated circuit including first circuitry for generating a charging current responsive to an input voltage source. The input voltage source may comprise a USB voltage source or a non-USB voltage source. A USB detection circuit determines whether the input voltage source comprises the USB voltage source or the non-USB voltage source.Type: ApplicationFiled: April 14, 2009Publication date: March 4, 2010Applicant: INTERSIL AMERICAS INC.Inventor: CHUCK WONG
-
Publication number: 20090295339Abstract: A universal serial bus charger comprises a universal serial bus connector for providing a connection to a voltage source. An output voltage connector provides a charging voltage to a connected battery. A switching voltage regulator generates the charging voltage responsive to the voltage source. Control circuitry monitors an actual charging current applied to the connected battery and provides a programmed current signal enabling the actual charging current to operate at a programmed level if the actual charging current does not exceed a programmed charging current level. The control circuitry provides a charging current limit signal enabling the actual charging current to operate at a predetermined charge current limit if the actual charging current exceeds the programmed charging current level. PWM control circuitry generates switching control signals to control operation of the switching voltage regulator responsive to the control circuitry.Type: ApplicationFiled: April 23, 2009Publication date: December 3, 2009Applicant: INTERSIL AMERICAS INC.Inventor: Chuck Wong
-
Publication number: 20080252252Abstract: A cradle charging system comprises a charging cradle defining a space for a battery of an electronic device. Transformer charging circuitry for charging the battery in the electronic device includes a primary side circuitry for receiving a charging voltage. Secondary side circuitry inductively couples the charging voltage to the battery. The secondary side circuitry provides a controlled output signal based on either constant voltage control or constant current control responsive to a charge level of the battery.Type: ApplicationFiled: September 17, 2007Publication date: October 16, 2008Applicant: INTERSIL AMERICAS INC.Inventor: CHUCK WONG
-
Patent number: 6775164Abstract: A three-terminal low-voltage PWM controller chip includes a first terminal for receiving operating bias current supply and a feedback control signal related to an output parameter of an electrical circuit to be controlled; a second terminal connected to an output switch providing digital width-modulated control pulses to control duty cycle of the electrical circuit; a third terminal ground connection; a clocked pulse width modulation circuit responsive to current flow between the second terminal and the third terminal and the feedback control value for controlling the digital output switch; and, feedback signal separation circuitry for separating the feedback control signal from the operating bias current supply. A start-up circuit is also provided.Type: GrantFiled: March 14, 2002Date of Patent: August 10, 2004Assignee: Tyco Electronics CorporationInventors: Chuck Wong, Paul W. Latham, II, Shawn Laliberte
-
Publication number: 20030174005Abstract: A CMOS digital PWM controller chip includes a clock generator for directly generating a sampling clock at a frequency higher than a control pulse rate without requiring a phase locked loop, an oversampling analog-to-digital converter clocked by the sampling clock for converting error signals into filtered digital values, an output for controlling duty cycle of an electrical device in accordance with width-modulated digital control pulses supplied at the control pulse rate, and, digital control logic for generating the width-modulated digital control pulses in relation to the digital values. The digital control logic may include a linear feedback shift register to pseudo-randomize the digital control pulses to reduce electromagnetic interference.Type: ApplicationFiled: March 14, 2002Publication date: September 18, 2003Inventors: Paul W. Latham, Shawn Laliberte, Chuck Wong
-
Publication number: 20030174528Abstract: A three-terminal low-voltage PWM controller chip includes a first terminal for receiving operating bias current supply and a feedback control signal related to an output parameter of an electrical circuit to be controlled; a second terminal connected to an output switch providing digital width-modulated control pulses to control duty cycle of the electrical circuit; a third terminal ground connection; a clocked pulse width modulation circuit responsive to current flow between the second terminal and the third terminal and the feedback control value for controlling the digital output switch; and, feedback signal separation circuitry for separating the feedback control signal from the operating bias current supply. A start-up circuit is also provided.Type: ApplicationFiled: March 14, 2002Publication date: September 18, 2003Inventors: Chuck Wong, Paul W. Latham, Shawn Laliberte
-
Patent number: 6456511Abstract: An output isolated, switching power supply has a transformer with a primary and two secondaries, an electronic switch in series with the primary, a first rectifier and filter on the first secondary to provide bias power during both startup and operating modes, and a second rectifier and filter on the second secondary to provide regulated output power. A resistor-capacitor network on the primary side provide an initial operating condition, such as a single control pulse, to the electronic switch which causes sufficient energy to be transferred through the first secondary to supply sufficient startup energy to operate a current control integrated circuit on the secondary side in a staged fashion. After the initial operating condition, the current control integrated circuit generates and applies a control signal to the electronic switch through an isolation circuit to cause the electronic switch to turn on and off in controlled fashion in order to deliver regulated power to the output of the supply.Type: GrantFiled: June 29, 2000Date of Patent: September 24, 2002Assignee: Tyco Electronics CorporationInventor: Chuck Wong
-
Patent number: D421953Type: GrantFiled: January 15, 1999Date of Patent: March 28, 2000Assignee: Mitsuishi Jidosha Kogyo Kabushiki KaishaInventors: Daniel Jerome Sims, Chuck Wong