High side driver without dedicated supply in high voltage applications
First Claim
1. A DC-to-DC converter, comprising:
- a highside switch having a first terminal, a second terminal and a gate, wherein the first terminal is coupled to an input voltage terminal;
a lowside switch having a first terminal, a second terminal and a gate wherein the first terminal of the lowside switch is coupled to the second terminal of the highside switch and the second terminal of the lowside switch is coupled to ground;
a diode coupled to the gate of the lowside switch on one side and to a capacitor on the other side; and
an integrated circuit (IC) configured and arranged to generate control signals for switching the highside switch and the lowside switch via one of the control signals coupled to activate the lowside switch and to charge the capacitor, wherein the IC includes a highside supply pin, a half bridge pin, a lowside gate control pin and a ground pin, wherein the gate of the lowside switch and the capacitor are coupled to the lowside gate control pin, wherein the capacitor is configured and arranged to charge via energy from the lowside gate control pin.
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Accused Products
Abstract
A DC-to-DC converter is disclosed. The SMPS driver includes a highside switch having a first terminal, a second terminal and a gate. The first terminal is coupled to an input voltage terminal. The SMPS driver further includes a lowside switch having a first terminal, a second terminal and a gate. The first terminal of the lowside switch is coupled to the second terminal of the highside switch and the second terminal of the lowside switch is coupled to ground. A diode is coupled to the gate of the lowside switch on one side and to a capacitor on the other side. An integrated circuit (IC) is included to generate control signals for switching the highside switch and the lowside switch. The IC includes a highside supply pin, a highside gate control pin, a half bridge pin, a lowside gate control pin and a ground pin. The gate of the lowside switch is coupled to the lowside gate control pin, the highside supply pin is coupled to the diode and the capacitor is coupled to the half bridge pin.
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Citations
19 Claims
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1. A DC-to-DC converter, comprising:
- a highside switch having a first terminal, a second terminal and a gate, wherein the first terminal is coupled to an input voltage terminal;
a lowside switch having a first terminal, a second terminal and a gate wherein the first terminal of the lowside switch is coupled to the second terminal of the highside switch and the second terminal of the lowside switch is coupled to ground;
a diode coupled to the gate of the lowside switch on one side and to a capacitor on the other side; and
an integrated circuit (IC) configured and arranged to generate control signals for switching the highside switch and the lowside switch via one of the control signals coupled to activate the lowside switch and to charge the capacitor, wherein the IC includes a highside supply pin, a half bridge pin, a lowside gate control pin and a ground pin, wherein the gate of the lowside switch and the capacitor are coupled to the lowside gate control pin, wherein the capacitor is configured and arranged to charge via energy from the lowside gate control pin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 18, 19)
- a highside switch having a first terminal, a second terminal and a gate, wherein the first terminal is coupled to an input voltage terminal;
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10. A DC-to-DC converter, comprising:
- two highside switches, each having a first terminal, a second terminal and a gate, wherein the first terminal is coupled to an input voltage terminal;
two lowside switches, each having a first terminal, a second terminal and a gate, wherein the first terminal of the lowside switch is coupled to the second terminal of the highside switch and the second terminal of the lowside switch is coupled to ground;
two diodes, each coupled to the gate of one of the lowside switches on one side and to a capacitor on the other side; and
an integrated circuit (IC) configured and arranged to generate control signals, including a first control signal, for switching each of the highside switches and each of the lowside switches, wherein the IC is configured and arranged to generate the first control signal to activate the lowside switches and to charge the capacitors, wherein the IC has two highside supply pins, two highside gate control pins, two half bridge pins, two lowside gate control pins and a ground pin, wherein the gate of the each of the lowside switches and the capacitors are respectively coupled to the two lowside gate control pins, wherein the capacitors are configured and arranged to charge via energy from at least one of the lowside control pins. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
- two highside switches, each having a first terminal, a second terminal and a gate, wherein the first terminal is coupled to an input voltage terminal;
Specification