Low-inductance package for multiple paralleled devices operating at high frequency
First Claim
1. A semiconductor device package, comprising:
- an electrically insulating substrate;
three power terminals bonded to said substratea first group of parallel-coupled switching devices mounted on, and electrically connected to, a first one of said three power terminals;
a second group of parallel-coupled switching devices mounted on, and electrically connected to, a second one of said three power terminals;
first and second control terminals bonded to said substrate for connection to a control circuit;
said first and second groups of switching devices being configured and aligned on said substrate, and said first and second control terminals being configured, such that corresponding connections between said switching devices and said power terminals and between said switching devices and said control terminals have substantially equal, minimal inductances, whereby the parallel-coupled switching devices of each said group share substantially equal current and switch on and off substantially simultaneously.
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Accused Products
Abstract
A low-inductance package for multiple paralleled devices includes an electrically insulating substrate having three power terminals direct-bonded to the upper surface thereof and a conductive pad direct-bonded to the lower surface thereof for connection to a heat sink. Two groups of multiple parallel-coupled devices are each soldered to one of the three power terminals and are further connected in a half-bridge configuration such that one of the three power terminals is common to both groups of devices. The package further includes a pair of first Kelvin terminals, i.e., a first Kelvin control terminal and a first Kelvin source terminal, and a pair of second Kelvin terminals, i.e., a second Kelvin control terminal and a second Kelvin source terminal. The Kelvin terminals are soldered to the appropriate power terminals, depending upon the particular circuit configuration. The multiple parallel-coupled devices of each group are aligned such that the lengths of the wire bonds to the respective control and power terminals are substantially the same and furthermore are shortened. As a result, the stray inductance due to the wire bonds is the same for each group of devices and is minimized. Current sharing and simultaneous switching of devices within each group are thus ensured.
24 Citations
20 Claims
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1. A semiconductor device package, comprising:
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an electrically insulating substrate; three power terminals bonded to said substrate a first group of parallel-coupled switching devices mounted on, and electrically connected to, a first one of said three power terminals; a second group of parallel-coupled switching devices mounted on, and electrically connected to, a second one of said three power terminals; first and second control terminals bonded to said substrate for connection to a control circuit; said first and second groups of switching devices being configured and aligned on said substrate, and said first and second control terminals being configured, such that corresponding connections between said switching devices and said power terminals and between said switching devices and said control terminals have substantially equal, minimal inductances, whereby the parallel-coupled switching devices of each said group share substantially equal current and switch on and off substantially simultaneously. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification