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公开(公告)号：US20190052262A1
公开(公告)日：2019-02-14
申请号：US16161124
申请日：2018-10-16
Applicant: Texas Instruments Incorporated
Inventor： Giacomo Calabrese , Maurizio Granato , Giovanni Frattini
IPC: H03K17/691 , H03K5/08 , H03K19/00
Abstract: Disclosed examples include isolated load switch driver circuits to drive a load, including an impedance circuit that receives a digital input voltage signal from a signal source, and selectively allows a current signal to flow from the signal source to charge a buffer capacitor. An impedance control circuit controls the impedance circuit to limit the current signal in response to the buffer capacitor reaching a first threshold voltage, and an output circuit provides an output isolated from the digital input voltage signal to switch the load. A signaling circuit selectively enables the output circuit to draw power from the buffer capacitor in response to the voltage of the buffer capacitor reaching the first threshold voltage.
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公开(公告)号：US20180309443A1
公开(公告)日：2018-10-25
申请号：US15492256
申请日：2017-04-20
Inventor： Giacomo Calabrese , Maurizio Granato , Giovanni Frattini
IPC: H03K17/691 , H03K5/08 , H03K19/00
CPC classification number: H03K17/691 , H03K5/08 , H03K19/0005
Abstract: Disclosed examples include isolated load switch driver circuits to drive a load, including an impedance circuit that receives a digital input voltage signal from a signal source, and selectively allows a current signal to flow from the signal source to charge a buffer capacitor. An impedance control circuit controls the impedance circuit to limit the current signal in response to the buffer capacitor reaching a first threshold voltage, and an output circuit provides an output isolated from the digital input voltage signal to switch the load. A signaling circuit selectively enables the output circuit to draw power from the buffer capacitor in response to the voltage of the buffer capacitor reaching the first threshold voltage.
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