-
公开(公告)号：US11387825B2
公开(公告)日：2022-07-12
申请号：US16689687
申请日：2019-11-20
申请人： ABLIC Inc.
发明人： Kaoru Sakaguchi
IPC分类号： H03K17/082 , H03K17/08 , H02H7/12 , H01L27/02 , H02H5/04 , H03K17/0812
摘要： An overheat protection circuit includes a first constant current source which supplies a first constant current to a temperature sensitive element, a first transistor provided between the temperature sensitive element and the first constant current source, an output current detection circuit which controls a gate voltage of the first transistor by a voltage based on a sense current corresponding to an output current of a semiconductor device, and an output circuit which supplies an overheat detection signal based on a result of comparison between a temperature sensitive current and the first constant current.
-
公开(公告)号：US10401891B2
公开(公告)日：2019-09-03
申请号：US16227740
申请日：2018-12-20
申请人： ABLIC Inc.
发明人： Kaoru Sakaguchi
IPC分类号： G05F3/24 , G05F3/26 , H01L27/06 , H01L27/088
摘要： A reference voltage circuit includes: a depletion type MOS transistor and an enhancement type MOS transistor connected in series, and having gates thereof connected in common, the enhancement type MOS transistor providing a reference voltage from a drain thereof, the depletion type MOS transistor including at least a first depletion type MOS transistor and a second depletion type MOS transistor connected in series; and a capacitor having one end connected to a drain of the first depletion type MOS transistor, and the other end connected to a source of the first depletion type MOS transistor.
-
公开(公告)号：US11695406B2
公开(公告)日：2023-07-04
申请号：US17453903
申请日：2021-11-08
申请人： ABLIC Inc.
发明人： Kaoru Sakaguchi
IPC分类号： G05F1/573 , H03K17/082 , H02H3/08
CPC分类号： H03K17/0822 , G05F1/573 , H02H3/08 , H03K17/082
摘要： An overcurrent protection circuit configured to limit an output current flowing through an output transistor includes a sense transistor that provides a sense current proportional to the output current, a sense resistor through which the sense current flows, a current limiting circuit that detects a sense voltage generated by the sense resistor and controls a gate voltage of the output transistor, and a current correction circuit that provides the sense resistor with a corrected sense current added to the sense current based on a difference of voltage between a drain voltage of the output transistor and a drain voltage of the sense transistor.
-
公开(公告)号：US10824181B2
公开(公告)日：2020-11-03
申请号：US16752929
申请日：2020-01-27
申请人： ABLIC Inc.
发明人： Kaoru Sakaguchi
IPC分类号： G05F3/02 , G05F3/24 , H01L27/088
摘要： A reference voltage circuit includes a first MOS transistor pair having a first MOS transistor of an enhancement type having a gate and a drain connected to each other, and a second MOS transistor of a depletion type having a gate connected to a source of the first MOS transistor, a source connected to the drain of the first MOS transistor, and a drain connected to an output terminal; and a second MOS transistor pair having a third MOS transistor of an enhancement type having a gate and a drain connected to the output terminal and a source connected to the source of the second MOS transistor, and a fourth MOS transistor of a depletion type having a gate connected to the source of the third MOS transistor and a source connected to the output terminal. All the MOS transistors operate in a weak inversion region.
-
公开(公告)号：US20190294189A1
公开(公告)日：2019-09-26
申请号：US16279492
申请日：2019-02-19
申请人： ABLIC Inc.
发明人： Kaoru Sakaguchi
摘要： A voltage regulator includes an error amplifier which receives a feedback voltage and a reference voltage, an amplifier circuit which receives an output voltage of the error amplifier and controls a gate of an output transistor by a first output voltage, and a non-regulation detection circuit which detects a non-regulation state of the voltage regulator based on a second output voltage of the amplifier circuit. The amplifier circuit includes a first transistor receiving the output voltage of the error amplifier at a gate of the first transistor, and a second transistor connected to a drain of the first transistor, and provides the second output voltage based on a gate-source voltage of the second transistor.
-
公开(公告)号：US11294410B2
公开(公告)日：2022-04-05
申请号：US16880174
申请日：2020-05-21
申请人： ABLIC Inc.
发明人： Kaoru Sakaguchi
摘要： A voltage regulator includes an error amplifier which controls the gate of an output transistor so that a feedback voltage based on an output voltage of an output terminal matches a first reference voltage, a first transistor having a gate to which a second reference voltage is supplied, and a first resistor connected between the gate of the output transistor and the source of the first transistor. The first resistor functions as a resistance constituting a phase compensation circuit by a current flowing therethrough in response to a small output current of the output transistor.
-
公开(公告)号：US10915126B2
公开(公告)日：2021-02-09
申请号：US16552733
申请日：2019-08-27
申请人： ABLIC Inc.
摘要： A voltage regulator includes an output voltage terminal which supplies an output voltage having a preset value, a voltage adjustment terminal which detects the output voltage, an error amplifier which compares the output voltage and a reference voltage to control the output voltage, a phase compensation capacitor, a test circuit which switches a normal mode with a test mode to test the phase compensation capacitor, a switch which makes the phase compensation capacitor valid or invalid, and a constant current source which makes a bias current of the error amplifier in the test mode lower than that in the normal mode.
-
公开(公告)号：US10705553B2
公开(公告)日：2020-07-07
申请号：US16555439
申请日：2019-08-29
申请人： ABLIC Inc.
发明人： Kaoru Sakaguchi
IPC分类号： G05F3/26
摘要： A constant current circuit includes a first current mirror circuit connected to a first power supply and having a first input transistor and a first output transistor of a first conductivity type, a second current mirror circuit having a second output transistor of a second conductivity type provided between the first input transistor and a second power supply, and a second input transistor of the second conductivity type provided between the first output transistor and the second power supply, a resistor interposed between the second output transistor and the second power supply, and a capacitor having one end connected to the first power supply and the other end connected to a connecting point of the second output transistor and the resistor.
-
公开(公告)号：US20200073424A1
公开(公告)日：2020-03-05
申请号：US16552733
申请日：2019-08-27
申请人： ABLIC Inc.
摘要： A voltage regulator includes an output voltage terminal which supplies an output voltage having a preset value, a voltage adjustment terminal which detects the output voltage, an error amplifier which compares the output voltage and a reference voltage to control the output voltage, a phase compensation capacitor, a test circuit which switches a normal mode with a test mode to test the phase compensation capacitor, a switch which makes the phase compensation capacitor valid or invalid, and a constant current source which makes a bias current of the error amplifier in the test mode lower than that in the normal mode.
-
公开(公告)号：US10571941B2
公开(公告)日：2020-02-25
申请号：US16272700
申请日：2019-02-11
申请人： ABLIC Inc.
发明人： Kaoru Sakaguchi
摘要： A voltage regulator includes an error amplifier which receives a feedback voltage and a reference voltage and thereby controls a gate voltage of an output transistor, a non-regulation detection circuit having a differential amplifier circuit operating on a current corresponding to an output current of the output transistor, and an overshoot suppression circuit having an overshoot detection circuit which enables an overshoot detection by a signal indicating the detection of non-regulation state from the non-regulation detection circuit.
-
-
-
-
-
-
-
-
-
搜索结果
16 条记录 (耗时 0.012 秒)
