Integrated silicon carbide diode rectifier circuits
View Patent ↗An integrated silicon carbide rectifier circuit with an on chip isolation diode. The isolation diode can be a channel-to-substrate isolation diode or a channel to channel isolation diode. the circuit teaches an integrated diode rectification circuit for use with a two phase center tap transformer having a first voltage output, a second voltage output, and a center tap output with a single chip having a first half-wave rectifier connected to the first voltage output, a second half-wave rectifier connected to the second voltage output, and a floating substrate connection connected to the center tap output and an on chip first channel-to-substrate isolation diode electrically connected between the first half-wave rectifier and the floating substrate.
1. An integrated diode rectification circuit, comprising for use with a two phase center tap transformer having a first voltage output, a second voltage output, and a center tap output:
a single chip having a first half-wave rectifier connected to the first voltage output, a second half-wave rectifier connected to the second voltage output, and a P-Substrate connection connected to the center tap output; and
an on chip first channel-to-substrate isolation diode electrically connected between the first half-wave rectifier and the P-substrate.
2. The circuit of claim 1 , further comprising:
an on chip second channel-to-substrate isolation diode electrically connected between the second half-wave rectifier and the P-substrate.
3. An integrated diode rectification circuit, for a single-phase transformer having a first voltage output and a second voltage output to supply a load with a first load connection and a second load connection, the circuit comprising:
a single chip having a floating P-substrate, a first rectifying diode with a first anode and a first cathode, the first anode electrically connected to the first voltage output and the first cathode electrically connected to the first load connection, a first isolation diode with a first isolation anode and a first isolation cathode, the first isolation cathode electrically connected to the first load connection, a second rectifying diode with a second anode and a second cathode, the second anode electrically connected to the second load connection and the second cathode electrically connected to the second voltage output, a second isolation diode with a second isolation anode and a second isolation cathode, the second isolation cathode electrically connected to the second voltage output, and the first isolation anode electrically connected to the second isolation anode.
4. The circuit of claim 3 , the single chip further comprising:
a third rectifying diode with a third anode and a third cathode;
the third anode electrically connected to the second load connection and the third cathode electrically connected to the first voltage output;
a third isolation diode with a third isolation anode and a third isolation cathode;
the third isolation cathode electrically connected to the first voltage output;
the third isolation anode electrically connected to the first isolation anode and the second isolation anode;
a fourth rectifying diode with a fourth anode and a fourth cathode;
the fourth anode electrically connected to the second load connection and the fourth cathode electrically connected to the second voltage output;
a fourth isolation diode with a fourth isolation anode and a fourth isolation cathode;
the fourth isolation cathode electrically connected to the second voltage output;
the fourth isolation anode electrically connected to the first isolation anode, the second isolation anode, and the third isolation anode.