Output circuit
US-9474124-B2 · Oct 18, 2016 · US
Output circuit
US10034347B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10034347-B2 |
| Application number | US-201715683334-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 22, 2017 |
| Priority date | Dec 22, 2010 |
| Publication date | Jul 24, 2018 |
| Grant date | Jul 24, 2018 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
There is provided an output circuit for supplying an output current to a load coupled to an output terminal in response to an input signal. The output circuit includes an output transistor for supplying the output current to the output terminal, an output-drive circuit for driving the output transistor, a constant-current limiting circuit for generating a current control signal for limiting the output current to a predetermined current value, and a control circuit for implementing a control such that the output current is controlled on the basis of the current control signal if a voltage at the output terminal is at a predetermined voltage, or less after the input signal is supplied while the output transistor is driven by the output-drive circuit if the voltage at the output terminal is in excess of the predetermined voltage.
First claim
Opening claim text (preview).
What is claimed is: 1. A drive circuit, comprising: an input port; an output port coupled to a load circuit; an output circuit that outputs one of a first current and a second current to the load circuit, the first current having a predetermined current value and the second current having a current value higher than the predetermined current value; and a short-circuit detection circuit that detects a short circuit at the load circuit, wherein the output circuit outputs the first current based on a control signal, wherein the output circuit switches to output the second current when the short-circuit detection circuit does not detect the short circuit after the first current is outputted, and wherein the output circuit includes a current mirror circuit to generate the first current. 2. The drive circuit according to claim 1 , wherein the output circuit switches to output the first current when the short-circuit detection circuit detects the short circuit after the second current is outputted. 3. The drive circuit according to claim 2 , wherein the output circuit switches to output the second current when the short circuit is cancelled. 4. The drive circuit according to claim 1 , wherein the short-circuit detection circuit detects the short circuit when an output voltage of the drive circuit is lower than a first predetermined voltage. 5. The drive circuit according to claim 1 , wherein a mirror ratio of the mirror circuit is 1:n, where n is an integer greater than 1.
Assignees
Inventors
Classifications
Measuring means of, e.g. currents through or voltages across the switch · CPC title
- H05B33/0887Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
- H03K17/0822Primary
in field-effect transistor switches · CPC title
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Frequently asked questions
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- What does patent US10034347B2 cover?
- There is provided an output circuit for supplying an output current to a load coupled to an output terminal in response to an input signal. The output circuit includes an output transistor for supplying the output current to the output terminal, an output-drive circuit for driving the output transistor, a constant-current limiting circuit for generating a current control signal for limiting the…
- Who is the assignee on this patent?
- Renesas Electronics Corp
- What technology area does this patent fall under?
- Primary CPC classification H05B33/0887. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 24 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).