Circuit arrangement for short-circuit detection in diodes, lighting arrangement and method therefor
US9835668B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 2012 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | May 23, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit arrangement comprises a first terminal for connection to a voltage source, a second terminal for connection to a first current sink and a third terminal for supplying a potential signal. A first diode string can be connected to the voltage source on the anode side and to the first current sink on the cathode side. The third terminal can be coupled to the cathode side of the first diode string by a resistor. An adjustable reference current sink is coupled to the third terminal, for generating a reference current, and comparison unit coupled to the third terminal on the input side for providing a short-circuit detection signal in dependence on a difference between the potential signal and an adjustable reference voltage. The potential signal can be supplied in dependence on a first short-circuit voltage across the first diode string and in dependence on the reference current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.