PACKAGED POWER SWITCHING DEVICE
First Claim
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1. A packaged switching device for power applications, comprising:
- at least one pair of power MOSFET transistor dies connected between upper and lower power source rail leads, a high side one of the pair of MOSFET transistor dies being connected to the upper power source rail lead and a low side one of the pair of MOSFET transistor dies being connected to the lower power source rail lead, wherein at least one of the MOSFET transistor dies is configured for vertical current flow therethrough and has a source electrode at a backside thereof.
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Abstract
A packaged switching device for power applications includes at least one pair of power MOSFET transistor dies connected between upper and lower power source rail leads, a high side one of the pair of MOSFET transistor dies being connected to the upper power source rail lead and a low side one of the pair of MOSFET transistor dies being connected to the lower power source rail lead. At least one of the MOSFET transistor dies is configured for vertical current flow therethrough and has a source electrode at a backside thereof.
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Citations
24 Claims
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1. A packaged switching device for power applications, comprising:
at least one pair of power MOSFET transistor dies connected between upper and lower power source rail leads, a high side one of the pair of MOSFET transistor dies being connected to the upper power source rail lead and a low side one of the pair of MOSFET transistor dies being connected to the lower power source rail lead, wherein at least one of the MOSFET transistor dies is configured for vertical current flow therethrough and has a source electrode at a backside thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A packaged switching device for power applications, comprising:
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a leadframe having a plurality of lead frame portions for making electrical connections to packaged devices; and at least one pair of power transistor dies having vertical current flow connected between upper and lower power source rail leads of said lead frame, a high side one of the pair of transistor dies being connected to the upper power source rail lead portion of said lead frame and a low side one of the pair of transistor dies being connected to the lower power source rail lead portion of the lead frame, the transistor dies being electrically coupled together at a switched output lead portion of the lead frame, wherein each of the following connections is formed through either direct mounting of one of said dies on said lead frame, through direct connection of the dies in a stack or through a low inductance conductive clip connector;
(i) upper power source rail lead portion to high side transistor die;
(ii) high side transistor die to low side transistor die; and
(iii) low side transistor die to lower power source rail lead portion. - View Dependent Claims (21, 22, 23)
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24. A power converter for DC-to-DC voltage conversion, comprising:
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control and driving circuitry; and a packaged switching device coupled to said control and driving circuitry, wherein the packaged switching device comprises; at least one pair of power LDMOS transistor dies configured for vertical current flow therethrough; a lead frame for making connections to said dies; and a molding material encapsulating said lead frame and dies, wherein the dies are connected in a push-pull configuration between upper and lower power source lead portions of the lead frame, a high side one of the pair LDMOS transistor dies being connected to the upper power source rail lead portion and a low side one of the pair of MOSFET transistor dies being connected to the lower power source rail lead portion, wherein at least one of the dies has a source electrode at a backside thereof.
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Specification