Claims: We claim:
1. A protected DC-DC converter for generating a plurality of outputs from a given signal, the converter comprising:
a triggering unit configured for modifying the given signal;
a solid state switch coupled to the triggering unit, wherein the solid state switch is configured for transforming the modified signal; and
a power converter module coupled to the solid state switch, wherein the power converter module is configured for converting the transformed signal into a plurality of outputs.
2. The converter according to Claim 1, wherein the triggering unit comprises of:
a modulator arrangement configured for modifying the input signal;
at least one protection circuit coupled to the modulator arrangement; and
a biasing circuit coupled to the protection circuit.
3. The converter according to Claim 2, wherein the triggering unit is optionally provided with a filter for reducing the interference.
4. The converter according to Claim 3, wherein the filter is at least one selected from a group comprising of a capacitive filter, a RC filter, an EMI filter, a LC filter, a RLC filter or a combination thereof.
5. The converter according to Claim 2, wherein the protection circuit is a voltage protection circuit and/or a current protection circuit.
6. The converter according to Claim 1, wherein the solid state switch is selected from a group comprising of a Transistor, a MOSFET, a BJT, an IGBT and/or a combination thereof.
7. The converter according to Claim 1, wherein the power converter module comprises of
a multi tap transformer, wherein at least one tap is
configured for biasing the input signal; and
a regulator arrangement configured for giving a
steady output.
8. The converter according to Claim 1, wherein the power converter module is provided with an over current protection circuit.
9. The converter according to Claim 8, wherein the output of the power converter module is independent of the load.
10. The converter according to Claim 9, wherein the independence of the load is achieved through the over current protection circuit.

Bangalore NARENDRA BHATTA HL
30 January 2017 (INTELLOCOPIA IP SERVICES)
AGENT FOR APPLICANT

, Description:A PROTECTED DC-DC CONVERTER
FIELD OF INVENTION
The invention generally relates to the field of power converters and particularly to a protected dc-dc converter.

BACKGROUND
A DC-DC converter is an electric power converter that converts a source of direct current from one voltage level to another. There are mainly two types of DC-DC converters, namely, an isolated DC-DC converter and a non-isolated DC-DC converter. There are isolated DC-DC converters known in the art that isolate the input and the output stages. One of the converters known in the art provides a single output DC-DC converter. Another system known in the art provides a single inductor multiple output power converter. The converter described herein is non-isolated and uses a feedback mechanism. The disadvantage includes poor load regulation.
Yet another system known in the art uses multiple transformers for generating multiple outputs. The complexity of the design increases with the increasing number of outputs due to transformer coupling. The above mentioned converters have disadvantages in terms of number of outputs, cost, size, mass, reliability and complexity.

BRIEF DESCRIPTION OF DRAWINGS
So that the manner in which the recited features of the invention can be understood in detail, some of the embodiments are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
FIG.1 shows a block diagram of a protected DC-DC converter, according to an embodiment of the invention.
FIG.2 shows a schematic representation of the protected DC-DC converter, according to an embodiment of the invention.

SUMMARY OF THE INVENTION
One aspect of the invention provides a protected DC-DC converter. The protected DC-DC converter includes a triggering unit configured for modifying the given signal, a solid state switch coupled to the triggering unit. The solid state switch is configured for transforming the modified signal. Further, a power converter module is coupled to the solid state switch. The power converter module is configured for converting the transformed signal into a plurality of outputs.

DETAILED DESCRIPTION OF THE INVENTION
Various embodiments of the invention provide a protected DC-DC converter. The protected DC-DC converter includes a triggering unit configured for modifying the given signal, a solid state switch coupled to the triggering unit, wherein the solid state switch is configured for transforming the modified signal and a power converter module coupled to the solid state switch, wherein the power converter module is configured for converting the transformed signal into a plurality of outputs. The protected DC-DC converter described herein briefly can be explained in detail.
FIG.1 shows a block diagram of a protected DC-DC converter, according to an embodiment of the invention. The protected DC-DC converter includes a triggering circuit 101 configured to receive a plurality of input signals. Upon receiving the input signals, the triggering circuit 101 modifies the input signals. A solid state switch 103 is coupled to the triggering circuit 101. The solid state switch 103 is configured for transforming the modified signal. The solid state switch 103 described herein includes but is not limited to a Transistor, a MOSFET, a BJT, an IGBT and/or a combination thereof. In one example of the invention, the solid state switch is a MOSFET. Further, the protected DC-DC converter includes a power converter module 105. The power converter module 105 is configured for converting the transformed signal into a plurality of outputs.
FIG.2 shows a schematic representation of the protected DC-DC converter, according to an embodiment of the invention. The triggering unit 201 includes a modulator arrangement 207 configured for modifying the input signal. A sync circuit 209 is coupled to the modulator arrangement 207. The sync circuit 209 is configured to synchronize the switching frequency of the signal. A start up circuit 211 is connected to the modulator arrangement 207. The start up circuit 211 is configured for enabling the initial start of the modulator arrangement 207. A protection circuit 213 is coupled to the modulator arrangement 207. Example of the protection circuit includes but is not limited to a voltage protection circuit and a current protection circuit. In one example of the invention, the protection circuit includes an over current protection circuit and an under voltage protection circuit. The over current protection circuit disables the circuit when the current increases over the preset current level. The under voltage protection circuit is configured to turn OFF the DC-DC converter, when the input voltage goes below the desired level. The turning OFF of the DC-DC converter allows the converter to remain in latch mode. A biasing circuit 215 is also coupled to the modulator arrangement 207. In one example of the invention, the biasing circuit 215 is a feed forward circuit. The feed forward circuit improves the line transient performance, which ensures enhanced improvement of the load regulation. The triggering unit 201 is optionally provided with a filter 219 for reducing the interference, if any, from the input signal. Examples of filter include but are not limited to a capacitive filter, a RC filter, a LC filter, a RLC filter or a combination thereof. In one example of the invention, the filter is an LC filter.
Upon modifying the input signal, the modified signal is fed to the gate of the solid state switch 203. The solid state switch 203 described herein includes but are not limited to a Transistor, a MOSFET, a BJT, an IGBT and/or a combination thereof. In one example of the invention, the solid state switch 203 is a combination of MOSFETs. The combination includes but is not limited to a push-pull combination, a half-bridge combination, a full bridge combination and an H – bridge combination. The solid state switch 103 is configured for transforming the modified signal.
The signal transformed by the switch 203 is then fed to the power convertor module 205. The power converter module 205 is configured for converting the transformed signal into a plurality of outputs. The power converter module 205 includes a multi tap transformer 221, wherein at least one tap is configured for biasing the input signal. In one example of the invention the multi tap transformer contains bias windings, primary windings, a plurality of secondary windings wound on the core of transformer. The power converter includes a regulator arrangement 223. The regulator arrangement 223 is configured to provide regulated and steady output. The regulator arrangement 223 includes but is not limited to a rectifier, a filter circuit and a regulator. In one example of the invention, the output is in the range of about ±5V to about ±30V. In another example of the invention, the output is in the range of about +5V to about +30V. The power converter module 205 is provided with an over current protection circuit 225. The load regulation of the output is achieved through the regulator arrangement 223.
The invention provides a protected DC-DC convertor. The convertor is protection from any inrush current/voltage from the advantageous arrangement provided within the triggering circuit. The intelligent winding and tapping of the transformer provided within the output regulator enables the convertor to provide a plurality of voltages. The advantageous construction of the DC-DC convertor enables the same to be housed within a limited space thereby facilitating compacting of the space. The DC-DC convertor as described herein is utilized in applications where there is a demand for providing a plurality of regulated outputs. One such application is in the power module of the panel of a payload of a satellite.
The foregoing description of the invention has been set merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to person skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.