Power converter with split voltage supply
View Patent ↗A power converter driver that is supplied with two different voltages.
1. A driver arrangement comprising:
a low side driver comprising:
a high side predriver configured to drive a high side switch of a driver half-bridge, said driver half-bridge configured to drive a synchronous switch of a buck converter, said high side predriver supplied by a first voltage;
a low side predriver configured to drive a low side switch of said driver half-bridge, said low side predriver supplied by a second voltage;
said driver half-bridge coupled between said first voltage and ground; and
a high side driver configured to drive a control switch of said buck converter, said high side driver supplied by a third voltage,
wherein said control and synchronous switches are connected in series between a fourth voltage and ground,
wherein said first, second, third and fourth voltages are different from each other.
2. 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.
3. The driver arrangement of claim 2 , wherein said high side predriver half-bridge is connected between said first voltage and a ground voltage.
4. The driver arrangement of claim 2 , wherein said high side predriver switch is coupled to a predriver driver which is supplied by said second voltage.
5. The driver arrangement of claim 2 , wherein said low side predriver switch is coupled to a predriver driver which is supplied by said second voltage.
6. The driver arrangement of claim 2 , 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.
7. The driver arrangement of claim 1 , wherein said first voltage is derived from a bus voltage of a buck converter.
8. The driver arrangement of claim 1 , wherein said second voltage is supplied from an external source.
9. The driver arrangement of claim 1 , wherein said first voltage is derived from a bus voltage of a buck converter, and said second voltage is supplied from an external source.
10. The driver arrangement of claim 9 , wherein said bus voltage is provided by a linear drop out regulator.
11. The driver arrangement of claim 1 , wherein said first voltage is supplied from an external source.
12. The driver arrangement of claim 1 , wherein said second voltage is derived from a bus voltage of a buck converter.
13. The driver arrangement of claim 1 , wherein said first voltage is supplied from an external source, and said second voltage is derived from a bus voltage of a buck converter.
14. The driver arrangement of claim 13 , wherein said bus voltage is provided by a linear drop out regulator.