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Circuit arrangement for operation of at least one LED

A technology of a circuit device and a current measuring device, which is applied to lighting devices, electric light sources, electrical components, etc., can solve problems such as expensiveness and circuit consumption, and achieve the effects of reducing radio interference, saving space, and simple switching.

Inactive Publication Date: 2012-09-19
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, the circuit is relatively complex and expensive

Method used

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  • Circuit arrangement for operation of at least one LED
  • Circuit arrangement for operation of at least one LED
  • Circuit arrangement for operation of at least one LED

Examples

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Embodiment Construction

[0019] The single figure shows an exemplary embodiment of a circuit arrangement according to the invention in a schematic diagram. The supply voltage U is connected to the input with the first and the second input terminal Zw , the supply voltage may in particular be a so-called intermediate circuit voltage. A capacitor C2 is provided to stabilize this voltage. The voltage applied to the input U can be influenced by the size of the capacitor C2 Zw communication part. Voltage U Zw The ratio of the AC part to the DC part of the circuit affects the radio interference caused by the circuit arrangement.

[0020] The circuit includes an inverter with two transistors V1, V2 in a half-bridge arrangement. The respective transistors V1 , V2 are connected to source resistors R1 , R2 for measuring the current through the respective transistors V1 , V2 . A first half-bridge midpoint HBM1 of the circuit arrangement is formed between V1 , R1 on the one hand and V2 , R2 on the other han...

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PUM

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Abstract

The present invention relates to a circuit arrangement for operation of at least one LED, having an input with a first input connection (E1) and a second input connection (E2) for coupling to a supply voltage (UZw); an output having a first output connection (A1) and a second output connection (A2) for providing an output DC voltage (Uout) to the at least one LED; an inverter with a bridge circuit having at least one first electronic switch (V1) and a second electronic switch (V2), wherein the first electronic switch (V1) and the second electronic switch (V2) each have a control electrode, a reference electrode and a working electrode, wherein the first electronic switch (V1) and the second electronic switch (V2) are coupled in series between the first input connection (E1) and the second input connection (E2) forming a first bridge centre point (HBM1); a first inductance (L1), which is coupled in series between the first bridge centre point (HBM1) and one of the output connections (A1; A2) and a drive circuit having at least one first output connection and one second output connection, wherein the first output connection is coupled to the control electrode of the first electronic switch (V1), and the second output connection is coupled to the control electrode of the second electronic switch (V2); wherein the drive circuit has a first control apparatus (L2, 10, D5) and a second control apparatus (L3, 12, D2), wherein the first control apparatus (L2, 10, D5) has a second inductance (L2) which is magnetically coupled to the first inductance (L1), and wherein the second control apparatus (L3, 12, D2) has a third inductance (L3) which is magnetically coupled to the first inductance (L1).

Description

technical field [0001] The invention relates to a circuit arrangement for operating at least one LED, which has an input with a first and a second input connection for coupling to a supply voltage, an output with the output terminal has a first output terminal and a second output terminal for providing a DC output voltage to at least one LED; an inverter having at least a bridge circuit with a first electronic switch and a second electronic switch , wherein the first electronic switch and the second electronic switch respectively comprise a control electrode, a reference electrode and a working electrode, wherein the first electronic switch and the second electronic switch are coupled in series while constituting the midpoint of the first bridge. between an input terminal and a second input terminal; a first inductor coupled in series between the midpoint of the first bridge and one of the output terminals; and an excitation circuit with at least the first output terminal and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCY02B20/346H05B33/0815Y02B20/348Y02B20/30H05B45/39
Inventor 贝恩德·鲁道夫
Owner OSRAM GMBH