Minitab rectifying diode package with two different types of diodes for alternators
First Claim
1. A set of diodes comprising two diode types for application to alternators, each diode being configured for being connectable between an alternator a-c terminal and a d-c bus heat sink;
- each said diode comprising;
a flat thin silicon diode die having first and second main diode electrodes on its opposite respective surfaces, a lead frame having a relatively thick conductive section which receives said first one of said main diode electrodes and which supports said die, and a relatively thin conductive section which is laterally removed from and insulated from said relatively thick section and a wire bond connecting the second one of said main diode electrodes to said relatively thin conductive section, and a plastic insulation housing enclosing said die and at least portions of said relatively thick and relatively thin lead frame sections and said wire bond;
said relatively thick lead frame section having a bottom which is exposed through said plastic housing for connection to said d-c bus heat sink;
said relatively thin conductive section defining a connection tab extending through said plastic housing and connectable to said a-c terminal;
in one of said two diode types, said first and second main diode electrodes being respectively an anode and a cathode of said diode; and
in the other one of said two diode types, said first and second main diode electrodes being respectively a cathode and an anode of said diode.
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Accused Products
Abstract
A diode for use in an under-the-hood automotive application has a TO 220 outline and consists of a diode die on a two piece lead frame which has a thick section to which the bottom of the die is soldered, and a thinner section which extends through a plastic housing as a connection tab and which has a forked end for easy connection to a node of a three phase bridge. The bottom of the thickened section is exposed through the insulation housing for easy connection to a d-c heat sink rail. The diode is particularly useful in applications greater than 2 KW.
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Citations
12 Claims
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1. A set of diodes comprising two diode types for application to alternators, each diode being configured for being connectable between an alternator a-c terminal and a d-c bus heat sink;
- each said diode comprising;
a flat thin silicon diode die having first and second main diode electrodes on its opposite respective surfaces, a lead frame having a relatively thick conductive section which receives said first one of said main diode electrodes and which supports said die, and a relatively thin conductive section which is laterally removed from and insulated from said relatively thick section and a wire bond connecting the second one of said main diode electrodes to said relatively thin conductive section, and a plastic insulation housing enclosing said die and at least portions of said relatively thick and relatively thin lead frame sections and said wire bond;
said relatively thick lead frame section having a bottom which is exposed through said plastic housing for connection to said d-c bus heat sink;
said relatively thin conductive section defining a connection tab extending through said plastic housing and connectable to said a-c terminal;
in one of said two diode types, said first and second main diode electrodes being respectively an anode and a cathode of said diode; and
in the other one of said two diode types, said first and second main diode electrodes being respectively a cathode and an anode of said diode. - View Dependent Claims (2, 3, 4, 5, 6)
- each said diode comprising;
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7. A set of diodes comprising two diode types, each diode comprising a flat thin silicon diode die having first and second main diode electrodes on its opposite respective surfaces,
a lead frame having a relatively thick conductive section which receives said first one of said main diode electrodes and which supports said die, and a relatively thin conductive section which is laterally removed from and insulated from said relatively thick section and a wire bond connecting the second one of said main diode electrodes to said relatively thin conductive section, and a plastic insulation housing enclosing said die and at least portions of said relatively thick and relatively thin lead frame sections and said wire bond; -
said relatively thick lead frame section having a bottom which is exposed through said plastic housing for connection to a heat sink;
said relatively thin conductive section defining a connection tab extending through said plastic housing and connectable to an external terminal;
in one of said two diode types, said first and second main diode electrodes being respectively an anode and a cathode of said diode; and
in the other one of said two diode types, said first and second main diode electrodes being respectively a cathode and an anode of said diode. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification