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公开(公告)号：US20230297155A1
公开(公告)日：2023-09-21
申请号：US17833821
申请日：2022-06-06
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： CHIH-NING CHEN , CHIH-HENG SU
IPC: G06F1/3212 , G06F1/3287
CPC classification number: G06F1/3212 , G06F1/3287
Abstract: A power saving system of a battery charger is provided. A control terminal of a first transistor receives a wake-up signal. A counter is connected to a first terminal of the first transistor. The counter determines whether or not a working period of the wake-up signal from the first transistor is larger than a time threshold to output a counting signal. When the counting signal indicates that the working period of the wake-up signal is not larger than the time threshold, the counter and electronic components of an electronic device are turned off, thereby saving power of a battery. When the counting signal indicates that the working period of the wake-up signal is larger than the time threshold, the electronic device is switched from a power saving mode to a normal operation mode. In the normal operation mode, the battery can supply power to the electronic device.
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2.发明申请公开(公告)号：US20220271666A1
公开(公告)日：2022-08-25
申请号：US17363007
申请日：2021-06-30
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： CHUN-KAI HSU , CHIH-HENG SU
Abstract: A transient response improving system and method with a prediction mechanism of an error amplified signal are provided. A current sensor circuit senses a current flowing through a first resistor connected between an adapter and an electronic device. When the current is larger than a current threshold, a predicting circuit calculates a target voltage level based on a common voltage and a voltage of the battery and instantly pulls up or down a voltage level of the error amplified signal to the target voltage level. A comparator compares the error amplified signal with a ramp signal to output a comparison signal. A controller circuit controls a driver circuit to switch a high-side switch and a low-side switch according to the comparison signal.
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公开(公告)号：US20250088091A1
公开(公告)日：2025-03-13
申请号：US18508185
申请日：2023-11-13
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： CHUN-KAI HSU , CHIH-HENG SU
Abstract: A power converter improving input overvoltage from output voltage drop is provided. The power converter includes a high-side switch, a low-side switch, a control circuit, a voltage threshold determining circuit and a voltage drop suppression circuit. The voltage threshold determining circuit determines whether or not an output voltage of the power converter is dropping to determine or adjust a voltage threshold. The voltage drop suppression circuit detects a voltage of a first terminal of the high-side switch. When the voltage drop suppression circuit determines that the detected voltage of the first terminal of the high-side switch is higher than the voltage threshold, the voltage drop suppression circuit pulls down the voltage of the first terminal of the high-side switch.
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公开(公告)号：US20230283097A1
公开(公告)日：2023-09-07
申请号：US17894131
申请日：2022-08-23
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： CHIH-NING CHEN , CHIH-HENG SU
IPC: H02J7/00
CPC classification number: H02J7/00714 , H02J7/0024
Abstract: A switching charger for accurately sensing a small current is provided. First terminals of first transistors and a second transistor are coupled to a system voltage. Second terminals of the first transistors and a first input terminal of an operational amplifier are connected to a battery. A first terminal of a third transistor is connected to a second terminal of the second transistor and a second input terminal of the operational amplifier. A control terminal of the third transistor is connected to an output terminal of the operational amplifier. A first terminal of a fourth transistor is connected to a second terminal of the third transistor. First terminals of fifth transistors are coupled to an input voltage. Control terminals of the first transistors and the fifth transistors are connected to a control circuit. First terminals of sixth transistors are respectively connected to second terminals of the fifth transistors.
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公开(公告)号：US20190312450A1
公开(公告)日：2019-10-10
申请号：US16044623
申请日：2018-07-25
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： CHUN-KAI HSU , CHIH-HENG SU
Abstract: Disclosed are a non-narrow voltage direct current (NON-NVDC) charger and a control method thereof. In the present disclosure, a proper target voltage, related to a turn-on voltage of a switch circuit, is determined according to an output voltage of a load, a storage voltage of an energy storage device and a turn-on resistance value of the switch circuit. Then, according to the determined target voltage, the NON-NVDC charger can enter a supplement mode at an appropriate time. The NON-NVDC charger can be operated stably and has excellent operation efficiency even when a current flowing through a transformer close to a maximum safe current.
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Patent Agency Ranking
公开(公告)号：US20240097569A1
公开(公告)日：2024-03-21
申请号：US17991802
申请日：2022-11-21
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： CHUN-KAI HSU , CHIH-HENG SU
CPC classification number: H02M3/1584 , H02M1/0009 , G05F3/262
Abstract: An open-loop inductor current emulating circuit is provided. A current sensor circuit senses a current flowing through a first terminal of a low-side switch to output a current sensed signal. An emulation controller circuit outputs a plurality of charging current signals according to currents of a plurality of rising waveforms of the current sensed signal. The emulation controller circuit outputs a plurality of discharging current signals according to currents of a plurality of falling waveforms of the current sensed signal. A charging and discharging circuit generates a plurality of charging currents according to the charging current signals, and generates a plurality of discharging currents according to the discharging current signals. The charging and discharging circuit alternatively outputs the charging currents and the discharging currents to the capacitor to charge and discharge the capacitor multiple times, thereby achieving a purpose of emulating an inductor current.
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公开(公告)号：US20220333983A1
公开(公告)日：2022-10-20
申请号：US17392263
申请日：2021-08-03
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： Jia-Hua Hong , CHIH-HENG SU
Abstract: A method of stabilizing data of digital signals is provided. The method includes steps of: setting a boundary coefficient; reading a piece of digital data; defining a value of the piece of digital data as a center value; outputting the value of the piece of digital data; reading a next piece of digital data; subtracting a value of the next piece of digital data from the previously outputted value to obtain a positive difference or a negative difference; and determining whether or not an absolute value of the positive or negative difference is larger than the boundary coefficient, if not, outputting the center value, if yes, updating the center value such that the updated center value is equal to the value of the next piece of digital data, and outputting the updated center value.
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公开(公告)号：US20190190280A1
公开(公告)日：2019-06-20
申请号：US16286771
申请日：2019-02-27
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： CHIH-NING CHEN , CHIH-HENG SU
Abstract: A charging device and a control method thereof are provided. The charging device includes an adapter, an energy storage unit and a charging module. The adapter provides an adapter current. The charging module receives the adapter current and provides a first charging current to charge the energy storage unit, or an output current to charge an electronic device. When the input current is larger than a first preset current and the first charging current is equal to or less than a third preset current, the charging module operates in a boost mode, such that the energy storage unit provides a second charging current to the charging module. When the second charging current is larger than the third preset current, the charging module enters a buck mode such that the energy storage unit is charged by the first charging current.
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公开(公告)号：US20240171075A1
公开(公告)日：2024-05-23
申请号：US18113134
申请日：2023-02-23
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： YI-CHUAN LU , CHIH-HENG SU
CPC classification number: H02M3/1582 , H02M1/0022 , H02M1/0032
Abstract: A buck converter using an ultra-low working current is provided. An error amplifier amplifies a difference between a voltage of an output terminal of the buck converter and a reference voltage to output an error amplified signal. A comparator compares a voltage of the error amplified signal with a ramp voltage to output a comparison signal. A control circuit controls a driver circuit to drive a high-side switch and a low-side switch according to the comparison signal. When the buck converter does not enter an ultra-low current mode, a low current controller circuit controls a system circuit to obtain an input current from an input power source. When the buck converter enters the ultra-low current mode, the low current controller circuit controls the system circuit to stop obtaining the input current from the input power source.
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公开(公告)号：US20230369868A1
公开(公告)日：2023-11-16
申请号：US17868054
申请日：2022-07-19
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： CHUN-KAI HSU , CHIH-HENG SU , CHIH-NING CHEN
CPC classification number: H02J7/00047 , H03F3/45475 , G05F1/56 , H03K19/20
Abstract: A switching charger for supplying stable power is provided. First input terminals of first and fourth operational amplifiers and a second input terminal of a second operational amplifier are connected to a battery. A second input terminal of the first operational amplifier is coupled to a reference voltage. A first input terminal of the second operational amplifier and a second input terminal of the fourth operational amplifier are connected to an inductor. A first input terminal of a third operational amplifier is connected to an input power source. A second input terminal of the third operational amplifier is connected to a system circuit. A first selector circuit is connected to output terminals of the third and fourth operational amplifiers. A second selector circuit is connected to output terminals of the first and second operational amplifiers and the first selector circuit.
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