-
公开(公告)号：US20240297574A1
公开(公告)日：2024-09-05
申请号：US18592530
申请日：2024-03-01
申请人： ABLIC Inc.
发明人： Yoshiomi SHIINA
IPC分类号： H02M1/32 , G01R19/00 , G01R19/165 , H02M1/00 , H02M3/158
CPC分类号： H02M1/32 , G01R19/0038 , G01R19/16571 , H02M1/0009 , H02M3/158
摘要： A DC/DC converter is able to test an overcurrent detection circuit without damaging the circuit. The DC/DC converter includes: a high-side switch; an IV conversion element and a current detection transistor which are connected in parallel with the high-side switch; a low-side switch; an overcurrent detection circuit; and a control circuit which outputs a first signal from a first output port to the high-side switch, outputs a second signal from the second output port to the low-side switch, and outputs a third signal from a third output port to the current detection transistor. The DC/DC converter further includes a test port which controls the current detection transistor to be turned off in the case of testing the overcurrent detection circuit, and supplies a variable current to a connection point between the current detection transistor which is controlled to be turned off and the IV conversion element.
-
公开(公告)号：US20220294348A1
公开(公告)日：2022-09-15
申请号：US17689466
申请日：2022-03-08
申请人： ABLIC Inc
发明人： Yoshiomi SHIINA
摘要： Provided is a DC/DC converter capable of providing overvoltage protection reliably without being affected by, for example, an external element connected to an output terminal. The DC/DC converter includes a comparator, an RS-FF circuit, a drive circuit, and an ON-timer circuit, and the ON-timer circuit includes: a current source circuit which provides an electric current based on a power supply voltage; a ripple generation circuit which generates a ripple voltage; an averaging circuit which averages the ripple voltage; a timer circuit which generates an ON-timer signal; and an overvoltage protection circuit (clamp circuit).
-
公开(公告)号：US20220057825A1
公开(公告)日：2022-02-24
申请号：US17406460
申请日：2021-08-19
申请人： ABLIC Inc.
发明人： Yoshiomi SHIINA
IPC分类号： G05F3/26
摘要： Provided is a reference voltage circuit configured to supply a reference voltage in which a variation in voltage with respect to a variation in power supply voltage is suppressed. The reference voltage circuit includes a reference voltage generation circuit which includes an output line for supplying a generated reference voltage to an output terminal; and an output control circuit which includes an output transistor and a stabilization transistor, and is configured to control the supply of the reference voltage to the output terminal, the output transistor containing a gate to which a control voltage is to be provided, the stabilization transistor containing a gate to be connected to a source of the output transistor, and a source to be connected to a drain of the output transistor, and having a gate-source voltage that is equal to or more than a dram-source voltage in a saturation region of the output transistor.
-
公开(公告)号：US20220069717A1
公开(公告)日：2022-03-03
申请号：US17389347
申请日：2021-07-30
申请人： ABLIC Inc.
发明人： Yoshiomi SHIINA
摘要： A DC-DC converter of a synchronous rectification type includes a synchronous rectification transistor and a backflow detection circuit which detects a reverse current based on a voltage across the synchronous rectification transistor. The backflow detection circuit includes a first-stage differential input circuit including a first transistor, a first resistor, a second transistor, a second resistor and a fifth transistor, and a second-stage differential input circuit including a third transistor and a fourth transistor. The fifth transistor is of a same conductive type as the synchronous rectification transistor and contains a drain connected to the other end of the first resistor with respect to an end connected to the first transistor.
-
公开(公告)号：US20210304997A1
公开(公告)日：2021-09-30
申请号：US17211538
申请日：2021-03-24
申请人： ABLIC Inc.
发明人： Yoshiomi SHIINA , Kenji YOSHIDA
摘要： Provided is a semiconductor device capable of detecting an abnormal state in which two fuses are both short-circuited or cut. The semiconductor device includes: a trimming circuit having a first fuse and a second fuse connected in series; a current source circuit configured to supply current to the trimming circuit; and a determination circuit configured to determine whether a connection state or disconnect state of the first fuse and the second fuse are abnormal or not based upon signals derived from an output signal of the trimming circuit.
-
公开(公告)号：US20210250005A1
公开(公告)日：2021-08-12
申请号：US17160755
申请日：2021-01-28
申请人： ABLIC Inc.
发明人： Yoshiomi SHIINA
IPC分类号： H03F3/45
摘要： A differential amplifier includes first and second MOS transistors of a first conductivity type which constitute a differential input circuit, a bias current source which supplies a bias current to the first and second MOS transistors, and a third MOS transistor of the first conductivity type provided between the bias current source and the first and second MOS transistors and constituted to limit a back-gate voltage of the first and second MOS transistors.
-
公开(公告)号：US20200249710A1
公开(公告)日：2020-08-06
申请号：US16750802
申请日：2020-01-23
申请人： ABLIC Inc.
发明人： Yoshiomi SHIINA , Fumimasa Azuma
IPC分类号： G05F1/575
摘要： An input circuit includes a first input transistor and a second input transistor connected to an input terminal; a current source which makes a current flow in the second input transistor through a current mirror; a switch provided between the current mirror and the current source, and having a switch control terminal connected to the drain of the first input transistor; and a transistor connected to the first input transistor, on/off of the transistor being controlled by an output signal, wherein a current drivability of the second input transistor is switched by an output signal, and a threshold voltage to the input signal is determined based on the current drivability of the second input transistor and the current source.
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.012 秒)
