Power converter with split power supply
View Patent ↗A power converter driver that is supplied with two different voltages.
1. A driver arrangement comprising:
a high side predriver to drive a high side switch of a driver half-bridge included in said driver arrangement, said high side predriver supplied by a first voltage;
a low side predriver to drive a low side switch of said driver half-bridge, said low side predriver supplied by a second voltage greater than said first voltage;
said driver half-bridge coupled between said first voltage and ground.
2. The driver arrangement of claim 1 , wherein said driver half-bridge is configured to drive a synchronous switch of a buck converter.
3. The driver arrangement of claim 2 , wherein said second voltage is supplied from an external source, and said first voltage is derived from a bus voltage of said buck converter.
4. The driver arrangement of claim 2 , wherein said first voltage is supplied from an external source, and said second voltage is derived from a bus voltage of said buck converter.
5. The driver arrangement of claim 3 , wherein said bus voltage is provided by a linear drop out regulator.
6. The driver arrangement of claim 4 , wherein said bus voltage is provided by a linear drop out regulator.
7. The driver arrangement of claim 1 , wherein said high side predriver includes a high side predriver half-bridge having a high side predriver switch and a low side predriver switch, wherein said high side predriver half-bridge is connected between said first voltage and a ground voltage, and wherein said high side predriver switch is coupled to a predriver driver which is supplied by said second voltage.
8. The driver arrangement of claim 1 , wherein said high side predriver includes a high side predriver half-bridge having a high side predriver switch and a low side predriver switch, wherein said high side predriver half-bridge is connected between said first voltage and a ground voltage, and wherein said low side predriver switch is coupled to a predriver driver which is supplied by said second voltage.
9. The driver arrangement of claim 1 , wherein said high side predriver includes a high side predriver half-bridge having a high side predriver switch and a low side predriver switch, wherein said high side predriver half-bridge is connected between said first voltage and a ground voltage, and wherein said high side predriver switch and said low side predriver switch are coupled to a predriver driver which is supplied by said second voltage.