摘要:
A packaged power transistor device (100) having a leadframe including a flat plate (110) and a coplanar flat strip (120) spaced from the plate, the plate having a first thickness (110a) and the strip having a second thickness (120a) smaller than the first thickness, the plate and the strip having terminals (212; 121a). A field-effect power transistor chip (210) having a third thickness (210a), a first and a second contact pad on one chip side, and a third contact pad (211) on the opposite chip side, the first pad being attached to the plate, the second pad being attached to the strip, and the third pad being coplanar with the terminals. Encapsulation compound (130) filling the thickness difference between plate and strip, and spaces between chip and terminals, wherein the compound has a surface (101) coplanar with the plate surface (111) and the opposite surface (102) coplanar with the third pad (211) and the terminals (212; 212a), the distance (104) between the surfaces being equal to the sum of the first (110a) and third (210a) thicknesses.
摘要:
A power supply converter (100) comprising a first FET (210) connected to ground (230), the first FET coupled to a second FET (220) tied to an input terminal (240), both FETs conductively attached side-by-side to a first surface of a metal carrier (120) and operating as a converter generating heat; and a packaged load inductor (110) tied to the carrier and an output terminal (241), the inductor package wrapped by a metal sleeve (113) in touch with the opposite surface of the metal carrier, the sleeve operable to spread and radiate the heat generated by the converter.
摘要:
A field-effect transistor package includes a leadframe with a first linear thickness (150a) and a leadframe pad (151) of a reduced thickness; a first terminal of a field-effect transistor chip (140) attached to the pad and a second and a third terminal remote from the pad; a metal sheet (110) of a second linear thickness (110a) connecting the second transistor terminal to a package terminal; a metal sheet (112) of a third linear thickness (112a) connecting the third transistor terminal to a package terminal; the sum of the first linear thickness (about 0.125 mm) and the second linear thickness (about 0.125 mm) plus attach material (about 0.05 mm) comprising the package thickness (about 0.3 mm).
摘要:
An integrated power device module including a lead frame having first and second spaced pads, one or more common source-drain leads located between the first and second pads, and one or more drain leads located on the outside of the second pad. First and second transistors are flip chip attached respectively to the first and second pads, wherein the source of the second transistor is electrically connected to the one or more common source-drain leads. A first clip is attached to the drain of the first transistor and electrically connected to the one or more common source-drain leads. A second clip is attached to the drain of the second transistor and electrically connected to the one or more drain leads located on the outside of the second pad. Molding material encapsulates the lead frame, the transistors, and the clips to form the module.
摘要:
A semiconductor die package is disclosed. In one embodiment, the semiconductor die package has a substrate. It includes (i) a leadframe structure including a die attach region with a die attach surface and a lead having a lead surface, and (ii) a molding material. The die attach surface and the lead surface are exposed through the molding material. A semiconductor die is on the die attach region, and the semiconductor die is electrically coupled to the lead. The die attach surface and the lead surface can be in different planes.
摘要:
A semiconductor package assembly including a molded leadless package (MLP) having an exposed top emitter pad and an exposed bottom source pad. A folded heat sink is attached to the exposed top emitter pad of the MLP by a soft solder attach process. The folded heat sink has a planar member generally coextensive in size with the MLP and in electrical and thermal contact with the top emitter pad of the MLP, and also has one or more leads extending generally perpendicularly to the planar member in a direction towards the lower surface of the MLP. These heat sink leads may provide the emitter connection to a printed circuit (PC) board.
摘要:
A power FET (100) comprising a leadframe including a pad (110), a first lead (111), and a second lead (112); a first metal clip (150) including a plate (150a), an extension (150b) and a ridge (150c), the plate and extension spaced from the leadframe pad and the ridge connected to the pad; a vertically assembled stack of FET chips in the space between the plate and the pad, the stack including a first n-channel FET chip (120) having the drain terminal on one surface and the source and gate terminals on the opposite surface, the drain terminal attached to the pad, the source terminal attached to a second clip (140) tied to the first lead; and a second n-channel FET chip (130) having the source terminal on one surface and the drain and gate terminals on the opposite surface, the source terminal attached to the second clip, its drain terminal attached to the first clip; wherein the drain-source on-resistance of the FET stack is smaller than the on-resistance of the first FET chip and of the second FET chip.
摘要:
A semiconductor die package includes: an assembly including a semiconductor die, a clip structure attached to an upper surface of the semiconductor die, and a heat sink attached to an upper surface of the clip structure; and a molding material partially encapsulating the assembly, wherein an upper surface of the heat sink is exposed through the molding material.
摘要:
A high frequency power supply module (200) of a synchronous Buck converter stacking the control FET (210) and sync FET (220) and having the driver IC (230) integrated in the final package solution. A QFN leadframe has a rectangular flat pad (201) destined to become the heat spreader of the package; the leads (202) are positioned in line with two opposite sides of the pad, the other pad sides being free of leads. The sync FET die (220) is soldered to the pad; a first clip (240), soldered on the sync die, has the control die (210) attached by solder. A second clip (260) is soldered on top of the control die. Also soldered on the same pad, yet not stacked with the other dies, is IC driver chip (230). The IC driver is wire bonded (233) to the pins of the package and to the stacked dies. All die attach and clip attach use the same solder material in order to be reflowed in the same reflow step.
摘要:
A semiconductor package assembly including a molded leadless package (MLP) having an exposed top emitter pad and an exposed bottom source pad. A folded heat sink is attached to the exposed top emitter pad of the MLP by a soft solder attach process. The folded heat sink has a planar member generally coextensive in size with the MLP and in electrical and thermal contact with the top emitter pad of the MLP, and also has one or more leads extending generally perpendicularly to the planar member in a direction towards the lower surface of the MLP. These heat sink leads may provide the emitter connection to a printed circuit (PC) board.