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VCC charge and free-wheeling detection via source controlled MOS transistor

A technology of power supply voltage and current, applied in the field of power converters, can solve problems such as increasing the cost of driving circuits

Active Publication Date: 2014-12-24
DIALOG SEMICONDUCTOR GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The generation of this supply voltage Vcc usually requires multiple external components, thus increasing the cost of the drive circuit

Method used

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  • VCC charge and free-wheeling detection via source controlled MOS transistor
  • VCC charge and free-wheeling detection via source controlled MOS transistor
  • VCC charge and free-wheeling detection via source controlled MOS transistor

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Embodiment Construction

[0043] figure 1 A block diagram of a power converter 100 including a source controlled power switch 106 is shown. The power switch 106 may be located outside the integrated circuit of the power circuit 100 (also called the power converter network) and / or outside the integrated circuit including the driving circuit of the power converter 100 . The power switch 106 may include a transistor, for example, a field effect transistor (field effect transistor, FET), for example, a metal oxide semiconductor field effect transistor (MOSFET). The input voltage 101 is applied to the input terminal of the power converter. This input voltage 101 may be derived from a supply voltage (eg using a rectifier). The power converter 100 may include a resistor 102 . Further, the power converter 100 typically includes an inductor 103 (connected to the drain 121 of the power switch 106 ) for storing electrical energy that will be transferred from the input of the power converter 100 to the load 11...

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Abstract

The present document relates to power converters. In particular, the present document relates to free-wheeling detection and / or to the provisioning of the supply voltage of a driver circuit using a switched-mode power converter. A control circuit configured to control a switching state of a power switch (106) is described. A first port (121) of the power switch (106) is coupled to an inductor (103). The control circuit is configured to be coupled to a control port (120, 620) of the power switch (106); wherein the control port (120, 620) of the power switch (106) is different from the first port (121) of the power switch (106). The control circuit comprises a control unit (107, 601, 602) configured to generate a control signal for controlling the switching state of the power switch (106); wherein the control signal is to be provided to the control port (120, 620) of the power switch (106). Furthermore, the control circuit comprises free-wheeling sensing means (603) configured to detect an oscillation of a voltage at a measurement port (120, 620) of the power switch (106); wherein the measurement port (120, 620) of the power switch (106) is different from the first port (121) of the power switch (106); and wherein the oscillation of the voltage at the measurement port (120, 620) is indicative of free-wheeling of the inductor (103).

Description

technical field [0001] This document refers to power converters. In particular, this document relates to the detection of freewheeling and / or the supply of mains voltage using a drive circuit of a switching power converter. Background technique [0002] It is generally desired that a driver circuit (for example, a driver circuit for a Solid State Lighting (SSL) such as a Light Emitting Diode (LED)) generate its own from a switching converter included in the driver circuit and use The supply voltage used to drive the SSL device. The generation of the supply voltage Vcc usually requires a number of external components, thus increasing the cost of the driving circuit. Contents of the invention [0003] In this document, a driving circuit is described that generates a power supply voltage Vcc with a reduced number of external components. In other words, a cost-effective driver circuit for generating its own supply voltage is described. The primary power converter of the dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H05B44/00
CPCH03K17/687Y02B20/30H05B45/38H05B45/375H05B45/3725H05B45/385H02M3/156H03K3/01H02M1/08
Inventor 霍斯特·克内德根朱利安·泰利尔
Owner DIALOG SEMICONDUCTOR GMBH