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Circuit assembly for operating load

A circuit device and a technology for running a load, applied in the field of circuit devices, can solve the problems of poor electromagnetic compatibility, difficulty in accurately adjusting current, and high cost.

Inactive Publication Date: 2019-08-06
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] A further disadvantage of the hard-switching process is the poor electromagnetic compatibility at frequencies above 10 MHz and the miniaturization possible only to a limited extent due to the aforementioned disadvantages
[0009] If the converter is subsequently actuated digitally, as is commonly used today, then another problem arises: in the digital actuation, the digital control system is carried out by means of a microcontroller.
[0020] All these boundary conditions make accurate regulation of the current difficult and require very expensive and high-quality hardware in order to adequately suppress the visible oscillations in the current described at the outset

Method used

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  • Circuit assembly for operating load
  • Circuit assembly for operating load
  • Circuit assembly for operating load

Examples

Experimental program
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Embodiment Construction

[0047] image 3 A schematic circuit diagram of a known synchronous rectification buck converter is shown. and figure 1 The main difference of the illustrated topology is that the converter diode DF is replaced by the lower transistor SU. This results in a half-bridge configuration, in which the half-bridge is connected in parallel to the output of the converter. The positive input is at a DC potential of approximately 400V, and the negative input is at a reference potential. The conversion choke L is connected to the midpoint HSS of the half bridge, and the other connection end of the conversion choke L and the reference potential jointly form the output terminal LED+ / LED- of the converter. Connected in parallel to the output terminals LED+ / LED- of the converter is a filter capacitor C_filter.

[0048] The two half-bridge transistors SO and SU are now as Figure 4 Driven as shown. Figure 4 A time flow diagram of a known synchronous rectification buck converter is shown....

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PUM

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Abstract

The invention relates to a circuit assembly for operating a load, said circuit assembly having: an input for inputting an input voltage; an output for outputting an output voltage; a switching regulator, having a switching transistor, an inductor and a current valve, wherein the current valve is actively controlled and the switching regulator operates in forced continuous operation, and the circuit assembly has a feedback loop, the loop gain of which is selected in accordance with the frequency spectrum.

Description

technical field [0001] The invention relates to a circuit arrangement for operating loads with a partly digital control loop which is more stable than quantized vibrations. Background technique [0002] The invention relates to a circuit arrangement for operating a load of the type stated in the independent claim. [0003] figure 1 A known buck converter is shown with likewise known main components. The switch SO is connected in series with the freewheeling diode DF. The connection point of the cathode of the freewheeling diode DF and the connection point of the switch TO are connected to the choke coil L. The other terminal of the choke coil L is connected to the filter capacitor C_filter. The other end of the filter capacitor C_filter and the anode of the diode DF are grounded. [0004] The other terminal of the switch SO is connected to the input terminal of the buck converter. The output terminal of the buck converter is connected in parallel with the filter capaci...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/3725H05B45/375H05B45/39H05B45/36H05B45/38H05B45/59H02M3/1588
Inventor 马库斯·黑克曼
Owner OSRAM GMBH