DE10234999A1 - Reserve power supply device for electronic devices has incoming/outgoing connections and a transformer to pick up, deliver and transform/convert primary and secondary voltage/current respectively - Google Patents

Abstract

An incoming connection area (E) picks up a primary voltage (Uprim) and/or a primary current (Iprim). An outgoing connection area (A) delivers a secondary voltage (Usek) and/or a secondary current. A converter/transformer (T) converts the primary voltage picked up and/or the primary current picked up into the secondary voltage/current respectively to be delivered.

Description

The present invention relates to an auxiliary power supply device according to the preamble of claim 1.

With many electronic devices in addition to a main power supply, an auxiliary power supply or an auxiliary power supply is necessary to help with certain Operating modes of the electronic devices in which the main power supply, for example from electricity saving requirements, is switched off with to supply electrical energy.

Typical requirements for auxiliary power supplies can with common Concepts in which a connection area is provided, which for Receive a primary voltage and / or a primary current is shown, which have an output connection area, which to output a secondary voltage and / or a secondary Current is formed, and which is a transformation device have, which for converting the recorded primary voltage and / or the absorbed primary current to the secondary voltage to be delivered or the secondary current to be delivered are trained, limited or partially realized. On the one hand, these requirements apply a desired one as low as possible own power consumption, the lowest possible Size that possibility the development of an integrated or monolithic design and in any case ensuring a corresponding galvanic Isolation or decoupling of the auxiliary circuit from the one to be supplied Circuit.

The invention has for its object a Provide auxiliary power supply device, on which preferably A simple, space-saving, reliable and inexpensive auxiliary power supply can be implemented in a galvanically isolated manner.

The task is at an auxiliary power supply device the one mentioned at the beginning Kind according to the invention the characterizing features of claim 1 solved. Advantageous further developments of Auxiliary power supply device according to the invention are subject to the dependent Dependent claims.

Compared to generic auxiliary power supply devices is the auxiliary power supply device according to the invention characterized in that the transformation device on the input connection side a DC converter device or DC-DC converter device and that the transformation device on the input connection side a charge pump device with a plurality of pairs to one another complementary Phases.

It is thus a core idea of the present invention the transformation device, which for example usually from a transformer as such, through the combination a DC converter device with a charge pump device to train, in particular thus avoiding an expensive and Space-consuming transformer. It is also essential that the charge pump device is designed to have a plurality Pairs complementary to each other To generate phases.

The charge pump device will advantageously by a direct voltage or by direct current trained operable.

According to a preferred embodiment the auxiliary power supply device according to the invention the charge pump device on the input connection side an AC voltage source or has an alternating current source and that by the alternating voltage source or AC source the majority of the pairs of mutually complementary phases can be generated.

The alternating current source is advantageous or alternating voltage source of the charge pump device, an oscillator device or oscillation device or has one.

It is still an advantage that by the alternating current source or alternating voltage source for the phases complementary to each other Secondary voltage signals or secondary current signals can be generated are.

According to an advantageous development the auxiliary power supply device according to the invention it is provided that the alternating current source or alternating voltage source a plurality of output ports and that each have an output terminal a secondary voltage signal or secondary current signal the phases can be assigned or assigned and output on these.

It is also provided that the secondary voltage signals or secondary current signals of the Phases each roughly in the form of a square wave or trapezoidal signal exhibit. These signal forms are particularly simple and reliable and can be generated and superimposed.

It is also advantageous that the AC power source or the AC voltage source on the output terminal side a disconnecting / coupling device is connected directly. By this separation / coupling device becomes the galvanic Separation to the circuit to be supplied and its coupling to the auxiliary power supply.

It is particularly advantageous that the separation / coupling device is formed by a coupling capacitor device a plurality of coupling capacitors.

It is further preferred that each secondary voltage signal or secondary current signal of the phases is assigned a coupling capacitor and that in particular a coupling capacitor is connected in series with each output connection.

According to another preferred embodiment it is provided that the separation / coupling device on the output connection side a rectifier device is connected downstream for independent rectification of the respective secondary voltage signals or secondary current signals of phases.

It is preferred that the rectifier device has a plurality of rectifiers and that these rectifiers in particular as connected in parallel and mutually oriented Pairs of diodes are formed and each have an output side of a respective one Coupling capacitor are assigned and connected downstream.

It is also an advantage if of the rectifier device on the output connection side a smoothing device is connected downstream.

This smoothing device preferably has a capacitor device connected in parallel or through this formed. It is particularly provided that a first Connection or connection area of the capacitor device with diodes a first orientation and a second connection or connection area the capacitor device with the diodes of the second orientation are connected.

The DC voltage converter device can also have different embodiments.

It is particularly advantageous if the DC converter device on the input connection side has a resonant circuit device.

It is further preferred that the resonant circuit device has a series resonant circuit or is formed by such, in particular with an inductor and Capacity, whereby the resonant circuit device over one parallel to the capacity provided controllable switching device can be excited in parallel in a controlled manner is trained.

With a particularly advantageous embodiment the auxiliary power supply device according to the invention it is provided that the resonant circuit device on the output side a rectifier device is connected downstream for rectification the voltages / currents generated by the resonant circuit device, in particular in the form of a resonant circuit device oriented in series and in opposite directions switched diodes.

It is also provided that the Rectifier device on the output connection side a smoothing device is connected downstream, in particular in the form of a capacitor device, which in particular with a first connection with the one diode and with a second connection to the other diode of the rectifier device is connected in parallel.

It is particularly advantageous if to control the switch device of the resonant circuit device a control arrangement is provided. The control arrangement opens and includes the switch preferably periodically, the switch preferably for a approximately the resonance period time interval corresponding to the resonant circuit is opened. About the Time of closing the switch is a control of the subsequent rectifier arrangement delivered performance possible.

The resonant circuit device advantageously has a frequency and in particular a resonance frequency in the range from 100 kHz to 1 MHz.

In contrast, it is intended that the charge pump and in particular the alternating current source or AC voltage source has a much higher operating frequency, especially in the range from 20 MHz to about 100 MHz.

Because of the configurations described above the auxiliary power supply device according to the invention it is particularly advantageous if the charge pump and in particular the control for the resonant circuit device are constructed monolithically, in particular on or in a common chip or semiconductor module.

On the one hand, it can be provided be that the AC power source or AC power source that Control arrangement and that downstream of the resonant circuit device Rectifier arrangement monolithically integrated on a common chip are trained.

It can also go beyond be provided that the alternating current source or alternating voltage source, the control arrangement and the rectifier arrangement connected downstream of the resonant circuit device integrated with the switch in a common semiconductor module are trained.

It is also conceivable that the AC voltage source, the separation / coupling device and the rectifier device the charge pump monolithically on two chips in a common semiconductor module are built up.

In addition, it is conceivable that the disconnect / coupler and the signal transmitter are integrated together on a chip.

It is also of particular advantage if the voltage supply of the charge pump and in particular the Alternating voltage source or alternating current source for two phases in direct current in series switched is realized.

The invention is characterized in more detail below on the basis of further explanations:
Many devices have the normal Be also operated a standby mode or standby mode, in which only partial functions of the devices continue to be operated. The sub-functions are often only used to wait for a signal to switch on in normal operation. The power requirement of the standby circuit is therefore very low. On the other hand, the power consumption from the network in standby mode should also be low. Examples of such devices are television sets, PCs, printers, fax machines or the like.

All consumer devices are under a high Cost pressures. Auxiliary power supplies in particular are compared to their function relatively complex. For this reason, potential for reducing costs is often considered. The dream of many device developers would be that monolithically integrated auxiliary power supply.

The biggest obstacle is that required network separation, i.e. there must be no galvanic connection between primary and secondary side. The Isolation between primary and secondary side must 5kV for insulated devices and 1kV for devices withstand protective earth safely.

Practically all auxiliary power supplies work today on the flyback principle. A 600V to 800V blocking MOSFET clocks a primary winding of a transformer. A first secondary winding is used for the supply the control circuit and the regulation, a second secondary winding the supply of the load. Optionally, the regulation can also be done with the help an optocoupler.

On the semiconductor side there was in considerable cost savings through control circuits in recent years with fewer connections and less external wiring and by monolithic or multichip integration of control circuitry and MOSFET. The complexity of the transformer was only slightly reduced in the same time, which is why it makes up a significant part of the total costs today.

There are two approaches to auxiliary power supplies without transformers:
On the one hand, it is proposed to rectify the current flow via Y capacitors to an arrangement for radio interference suppression and to use them for an auxiliary power supply. The disadvantage here is that each element that is connected in series with the Y capacitors reduces the intended radio interference suppression. Furthermore, the maximum permissible total capacity is limited by safety regulations, and thus the available electricity.

Second, there are research activities on the field of piezoelectric transformers. However, you are currently even more expensive than magnetic transformers.

The present invention provides an auxiliary power supply that can be used without using a transformer from semiconductor components and a few passive components leaves. Some of the passive components can be created using multichip technology integrate. A constructed according to the invention Auxiliary power supply is then from an IC and a few passive Buildable components.

According to the invention, the energy transfer takes place with simultaneous network separation using a pair-wise complementary multi-phase Charge pump (2 × N-phase). The charge pump operates at a very high frequency, preferably in the range of 20MHz to 100MHz. This allows capacitors with smaller capacity be used and one gets does not conflict with safety regulations that affect the total capacitance between the capacitors Primary- and secondary side including Y capacitors limit.

If two branches of the charge pump are ideally in phase opposition to one another, common mode disturbances are mutually exclusive on.

In addition to disconnection is for most applications a voltage transformation is also required. In the simplest case could the output voltage can be reduced by a linear regulator, the efficiency would be however not acceptable. Known switching regulator arrangements require either more than an inductive component, or the voltage difference between Switch control and output are in the order of magnitude of the input voltage and therefore requires expensive high-voltage technology. That is why here is an arrangement for proposed a resonance converter that is only an inductive component needed and where there is only a slight voltage difference between the switch control and exit occurs. The voltage transformation takes place through parallel feed into the resonant circuit and serial decoupling.

A simple spool with only one Winding is a standard component and costs only a fraction of what a transformer with two secondary windings and grid separation costs.

The invention is explained below a schematic drawing based on preferred embodiments explained in more detail.

1 Fig. 10 is a block diagram explaining the basic principle of the auxiliary power supply device according to the present invention.

2 shows a charge pump device in a preferred embodiment of the auxiliary power supply device according to the invention.

3 shows a DC converter device of an embodiment of the auxiliary power supply device according to the invention.

4 shows an embodiment of the auxiliary power supply device according to the invention with a control for the resonant circuit of the DC-DC converter, and wherein an AC voltage is provided as the primary voltage.

5 shows another embodiment of a charge pump device.

6.7 show a sectional side view and a plan view of a portion of a monoli thical realization of the embodiment 4 ,

Below will be the same or the same structures with the same reference numerals, without that a detailed description is repeated with each occurrence becomes.

1 shows in the form of a schematic block diagram the basic structure of the auxiliary power supply device according to the invention 10 , The auxiliary power supply device according to the invention has an input connection area E for supplying a primary voltage Uprim or a primary current Iprim. An output connection area A is provided for outputting the converted secondary voltage Usek or the converted secondary current Isek. The conversion from the primary variables Uprim, Iprim to the secondary variables Usek, Isek is carried out by the transformation device T, which according to the invention consists of a DC converter device 20 on the input connection side E and subsequently from a charge pump device 30 is formed on the output terminal side A.

2 now shows in more detail an embodiment of the charge pump device 30 , Via input connections 31a and 31b become an alternating voltage source or alternating current source 31 , for example in the form of an oscillator, a direct current or a direct voltage for supply. Due to its function, the AC voltage source or AC power source generates 31 four phases P1 to P4 of current signals or voltage signals, which are combined to form complementary pairs and at the output connections 31-1 to 31-4 issue. These phases P1 to P4 or the corresponding current signals or voltage signals are a separation / coupling device 32 fed, which here from an arrangement of coupling capacitors 32-1 to 32-4 consists. Each coupling capacitor is there 32-1 to 32-4 each assigned to a phase P1 to P4 and with the corresponding output connection 31-1 to 31-4 connected in series. The isolating / coupling device 32 provides a galvanic isolation within the charge pump 30 between the input connection side and the output connection side and a signal coupling of these two sides to each other instead. On the output connection side of the separation / coupling device 32 then a rectifier device closes 33 or G3. This is formed by a plurality of pairs of first and second diodes D1 and D2. A pair of diodes D1 and D2 is a coupling capacitor 32-1 to 32-4 and thus assigned to a phase P1 to P4. The diodes D1 and D2 are the respective coupling capacitor 32-1 to 32-4 arranged parallel and opposite to each other, so that there is a rectifying effect of the respective diode pair D1, D2 in relation to the respective phase P1 to P4. To the rectifier device 33 , G3 then closes a smoothing device 34 an, the one of the embodiment of 2 consists of a smoothing capacitor C4 connected in parallel with its connections C4-1 and C4-2, the first connection C4-1 being assigned to and connected to the diodes D1 of the first orientation, and the second connection C4-2 of the capacitor C4 being the Diodes D2 assigned to the second orientation and connected to it.

3 shows an embodiment of a DC voltage or DC converter device, as can be used in the present invention. There is initially a serial resonant circuit on the input connection side 21 Provided from an inductance L and a capacitance C1, a controllably operable charging switch S being provided parallel to the capacitance C1, through which the resonant circuit is energized and excited to vibrate. To the serial resonant circuit 21 then a rectifier device closes 22 , G2 for rectification by the resonant circuit 21 generated voltages or currents. The rectifier device 22 , G2 in turn formed by two oppositely oriented diodes D3 and D4, which are parallel to the series resonant circuit 21 are arranged. A smoothing device then follows 23 with a smoothing capacitor C3 added in parallel via the terminals C3-1 and C3-2.

In 4 An embodiment of the auxiliary power supply device according to the invention is now shown, here the charge pump device 30 according to 2 and the DC-DC converter device 20 out 3 Find use. In addition, here is a control or activation arrangement 60 shown, which consists of a control circuit K, a transformer Ü, a receiving device D and a control a for the switch S of the series circuit 21 consists. In this case, for control via the control circuit K, the transmitted signal on the output connection side A and via the control device A that of the AC voltage source or AC source 31 supplied supply signal tapped, evaluated in the control device a, and supplied to the switch S in a control signal Vctrl. To supply the control a that of the AC voltage source or AC power source 31 supplied supply signal tapped.

A control arrangement is preferred 60 provided, over which the duty cycle of the switch S can be changed depending on the output voltage Usek. For this purpose, the output voltage Usek is detected by a control circuit K and compared with a target value. Deviations are coded, converted into short pulses, for example in their repetition frequency, with the aid of a signal transmitter Ü, galvanically isolated to a receiver device D transmitted and decoded there again. Alternatively, the information about the control deviation can also be transmitted in an electrically isolated manner using an optocoupler.

The control device a generates a control signal Vctrl from the system deviation, which is fed to the switch S. During the switch-off period, which is preferably the period of the resonance of the series resonant circuit 21 corresponds, the duty cycle can be changed depending on the control deviation.

4 shows a basic embodiment of the present invention, as it could occur in the application.

4 shows in the input connection area E the supply of an alternating voltage for supplying the entire auxiliary power supply device 10 , wherein a rectifier / smoothing device 40 is provided, which in turn consists of a conventional rectifier G1 and a smoothing capacitor C2.

The mains input voltage is rectified with a rectifier G1 and smoothed with a capacitor C2. The resonant circuit is connected to the rectified mains voltage 21 , consisting of the capacitance C1 and the inductance L. The resonant circuit is closed via C2 and a rectifier arrangement G2. A switch S is periodically closed to excite the vibrations. If it is only closed for a short period of time, a sinusoidal oscillation with an amplitude corresponding to the rectified mains voltage occurs at L. The switch S and the capacitor C1 must therefore be designed for at least twice the rectified mains voltage.

A smoothing capacitor C3 is connected to the rectifier G2 and an oscillator circuit as a load 31 the charge pump device 30 , The voltage drop across the load acts like a series resistor in the resonant circuit 21 and dampens it.

With a lower mains voltage the vibration amplitude and thus the current delivered to the load Reduce. To compensate, switch S can remain closed for a long time. So that increases the oscillation amplitude again, in addition the switch current contributes to the current flow across the load at, since he is also over the rectifier G2 is directed.

The oscillator 31 in this example has four outputs that are offset by exactly 90 ° to each other. The output signals are sent via four coupling capacitors of the same size 32-1 to 32-4 to a rectifier circuit 33 , G3 led. The DC voltage is smoothed with a capacitor C4 and fed to the output terminals.

The capacitors 32-1 to 32-4 can be designed as discrete high-voltage capacitors, whereby the total capacitance must not exceed a sum specified in safety regulations. The oscillator frequency should therefore be chosen so high that sufficient power is available on the output side. If necessary, an additional capacitor can be connected between a reference potential of the oscillator 31 and an output terminal are switched to suppress radio interference that could arise from oscillator signals that are not completely symmetrical.

5 shows an embodiment for a charge pump, after the actual generation of the phases P1 to P4 in the oscillator 31 or in the AC voltage source or AC power source 31 an arrangement 80 with drivers 81-84 is provided, which in turn is between the AC voltage source or AC power source 31 and the coupling capacitors 32-1 to 32-4 the separation / coupling device 32 are provided and with regard to their voltage supply for two phases each have a DC implementation in series.

The 6 and 7 show a sectional side view and a plan view of a possible implementation of an embodiment of the auxiliary power supply device according to the invention in monolithic form on one or more semiconductor chips. Here, on a carrier, for example a lead frame 2 , corresponding chips or semiconductor modules 3 educated. These can, for example, like that in the 6 and 7 is shown, corresponding assembly of the auxiliary power supply device according to the invention 10 realize. On the other hand, by providing separate substrate areas or chips and / or lead frames 3 or 2 also a galvanic isolation of modules to be separated, as that in the 6 and 7 is represented by the division into a left and a right half. On the left side of these two figures, it is also shown how the individual capacitor structures can be formed, namely as metallizations on the chip surface with between the vertically arranged metallizations 4 and 5 trained isolation areas 6 made of imide or oxide.

In this exemplary embodiment, the diodes of the rectifier G3 are combined monolithically on a chip, and the coupling capacitors 32-1 to 32-4 together with the oscillator 31 or the rectifier G3 integrated on a chip. For this purpose, the chip in question is provided with a sufficiently thick insulation layer, for example made of imide or oxide, and a further metallization is applied to the insulation layer. The capacitors 32-1 to 32-4 are realized by a metal surface on the silicon surface under the insulation layer and a metal surface on the insulation layer. The metal surfaces lying on the insulation layer are each connected to the other chip via a bonding wire.

The signal transmitter U is preferably on the same chip as the capacitors 32-1 to 32-4 realized using the same layers.

10

Auxiliary power supply means

20

DC converter device, DC-DC

transducer means

21

Resonant circuit means, Resonant circuit, line

arer resonant circuit

22

Rectifier means

23

smoother

30

Charge pump means, charge pump

31

AC power source, AC voltage source

31-1

output port

31-2

output port

31-3

output port

31-4

output port

31a

input port

31b

input port

32

Separation / coupling device

32-1

coupling capacitor

32-2

coupling capacitor

32-3

coupling capacitor

32-4

coupling capacitor

33

Rectifying means, rectifier

33-1

rectifier

33-2

rectifier

33-3

rectifier

33-4

rectifier

34

smoother

40

Smoothing / rectifying means

60

Rule- and control arrangement

A

Output terminal area

a

control

C1

capacitor resonant circuit

C2

Capacitor smoothing means

C3

Capacitor smoothing means

C4

Capacitor smoothing means

C3-1

first connection

C3-2

second connection

C4-1

first connection

C4-2

second connection

D

Receiver device, decoder

D1

diode

D2

diode

D3

diode

D4

diode

G1

Rectifier / smoothing device

G2

Rectifier means

G3

Rectifier means

iprim

primary current

isek

secondary current

K

Control circuit, encoder

L

Kitchen sink resonant circuit

P1

phase

P2

phase

P3

phase

P4

phase

S

Switch resonant circuit

T

Transforming means, Umwandlungsein

direction

Ü

transmission equipment

Claims (26)

Auxiliary power supply device with: - an input connection area (E), which is designed to receive a primary voltage (Uprim) and / or a primary current (Iprim), - an output connection area (A), which is used to output a secondary voltage (Usek) and / or a secondary current ( Isek), and - a conversion device or transformation device (T) which is designed to convert the recorded primary voltage (Uprim) and / or the received primary current (Iprim) to the secondary voltage (Usek) to be emitted or to the secondary current (Isek) to be emitted, characterized in that - the transformation device (T) on the input connection side has a DC converter device ( 20 ) or DC-DC converter device ( 20 ), and - that the transformation device (T) on the output connection side has a charge pump device ( 30 ) with a plurality of pairs of mutually complementary phases (P1, ..., P4). Auxiliary power supply device according to claim 1, characterized in that the charge pump device ( 30 ) can be operated with direct voltage or direct current. Auxiliary power supply device according to one of the preceding claims, characterized in that - the charge pump device ( 30 ) an AC power source or AC voltage source ( 31 ) and - that by the alternating current source or alternating voltage source ( 31 ) the plurality of pairs of mutually complementary phases (P1, ..., P4) can be generated. Auxiliary power supply device according to claim 3, characterized in that the alternating current source or alternating voltage source ( 31 ) has or is formed by an oscillator device. Auxiliary power supply device according to one of Claims 3 or 4, characterized in that that by the AC power source or AC voltage source ( 31 ) for the phases (P1, ..., P4) complementary secondary voltage signals or secondary current signals can be generated. Auxiliary power supply device according to one of Claims 3 to 5, characterized in that the alternating current source or alternating voltage source ( 31 ) a plurality of output connections ( 31-1 , ..., 31-4 ) and - that an output connection ( 31-1 , ..., 31-4 ) Can be assigned or assigned to a secondary voltage signal or secondary current signal of the phase (P1, ..., P4) and output on this. Auxiliary power supply device according to one of claims 5 or 6, characterized in that the secondary voltage signals or secondary current signals the phases (P1, ..., P4) each roughly in the form of a square wave signal or have a trapezoidal signal. Auxiliary power supply device according to one of Claims 3 to 7, characterized in that the alternating current source or alternating voltage source ( 31 ) on the output side, a separation / coupling device ( 32 ) is connected downstream. Auxiliary power supply device according to claim 8, characterized in that the separation / coupling device ( 32 ) is formed by a coupling capacitor device of a plurality of coupling capacitors ( 32-1 , ..., 32-4 ). Auxiliary power supply device according to claim 9, characterized in that - each secondary voltage signal or secondary current signal of the phases (P1, ..., P4) each has a coupling capacitor ( 32-1 , ..., 32-4 ) is assignable or assigned and - that in particular with each output connection ( 31-1 , ..., 31-4 ) a coupling capacitor ( 32-1 , ..., 32-4 ) is connected in series. Auxiliary power supply device according to one of Claims 8 to 10, characterized in that the separating / coupling device ( 32 ) on the output connection side a rectifier device ( 33 , G3) is connected downstream to rectify the respective secondary voltage signals or secondary current signals of the phases (P1, ..., P4). Auxiliary power supply device according to claim 11, characterized in that - the rectifier device ( 33 ) a plurality of rectifiers ( 33-1 , ..., 33-4 ) and - that each rectifier ( 33-1 , ..., 33-4 ) in particular in the form of a pair of diodes (D1, D2) connected in parallel and mutually oriented and each having an output side of a respective coupling capacitor ( 32-1 , ..., 32-4 ) is assigned and connected downstream. Auxiliary power supply device according to one of claims 11 or 12, characterized in that the rectifier device ( 33 , G3) on the output connection side a smoothing device ( 34 , C4) is connected downstream. Auxiliary power supply device according to claim 13, characterized in that - the smoothing device ( 34 , C4) has or forms a capacitor device (C4) connected in parallel and - that in particular a first connection (C4-1) of the capacitor device (C4) with the diodes (D1) of a first orientation and a second connection (C4-2) of the capacitor device ( C4) are connected to the diodes (D2) of the second orientation. Auxiliary power supply device according to one of the preceding claims, characterized in that the direct voltage converter device ( 20 ) on the input connection side a resonant circuit device ( 21 ) having. Auxiliary power supply device according to claim 15, characterized in that - the resonant circuit device ( 21 ) is or has a series resonant circuit, in particular with an inductance (L) and a capacitance (C1), and - that the resonant circuit device ( 21 ) can be excited in parallel in a controlled manner via a controllable switch device (S) provided in parallel with the capacitance (C1). Auxiliary power supply device according to claim 16, characterized in that - the resonant circuit device ( 21 ) on the output connection side a rectifier device ( 22 , G2) is connected downstream for rectification by the resonant circuit device ( 21 ) generated voltages / currents, - in particular in the form of the resonant circuit device ( 21 ) series and reverse oriented diodes (D3, D4). Auxiliary power supply device according to claim 17, characterized in that - the rectifier device ( 22 , G2) on the output connection side a smoothing device ( 23 ) is connected downstream, - in particular in the form of a capacitor device (C3), which in particular with a first connection (C3-1) with one diode (D3) and with a second connection (C3-2) with the other diode (D4) Rectifier device ( 22 , G2) is connected in parallel. Auxiliary power supply device according to ei nem of claims 15 to 18, characterized in that for controlling the switch device (S) of the resonant circuit device ( 21 ) a control arrangement (a) is provided. Auxiliary power supply device according to one of Claims 15 to 19, characterized in that the resonant circuit device ( 21 ) has an operating frequency and in particular a resonance frequency in the range from 100 kHz to 1 MHz. Auxiliary power supply device according to one of the preceding claims, characterized in that the charge pump ( 30 ) and in particular the alternating current source or alternating voltage source ( 31 ) has an operating frequency that is comparatively high compared to the operating frequency of the resonant circuit device ( 21 ), in particular in a range from about 20 MHz to about 100 MHz. Auxiliary power supply device according to one of the preceding claims, characterized in that the alternating current source or alternating voltage source ( 31 ), the control arrangement (a) and that of the resonant circuit device ( 21 ) downstream rectifier arrangement ( 22 , G2) are monolithically integrated on a common chip. Auxiliary power supply device according to claim 22, characterized in that the alternating current source or alternating voltage source ( 31 ), the control arrangement (a) and that of the resonant circuit device ( 21 ) downstream rectifier arrangement ( 22 , G2) are integrated in a common semiconductor module with the switch (S). Auxiliary power supply device according to one of the preceding claims, characterized in that the AC voltage source ( 31 ), the separation / coupling device ( 32 ) and the rectifier device ( 33 , G3) are built monolithically on two chips in a common semiconductor module. Auxiliary power supply device according to one of claims 22 to 24, characterized in that the separation / coupling device (32) and the signal transmitter (Ü) together are integrated on a chip. Auxiliary power supply device according to one of the preceding claims, characterized in that the voltage supply of the charge pump ( 30 ), especially the alternating voltage source or alternating current source ( 31 ), is realized for two phases (P1, ..., P4) connected in series in direct current.