Configurable and power-optimized integrated gate-driver for USB power-delivery and type-C SoCs
Techniques for power-Field Effect Transistor (power-FET) gate drivers are described herein. In an example embodiment, a method for an USB-enabled system with an integrated circuit (IC) controller comprises: determining, by the IC controller, whether a first power path or a second power path is coupled to the IC controller, where the first power path comprises an external N-channel power-FET and the second power path comprises an external P-channel power-FET; turning and maintaining ON the external N-channel power-FET by the IC controller, when the first power path is determined as being coupled to the IC controller; and turning OFF the external N-channel power-FET and turning and maintaining ON the external P-channel power-FET by the IC controller, when the second power path is determined as being coupled to the IC controller.
1. A method for a Universal Serial Bus (USB)-enabled system comprising an integrated circuit (IC) controller, the method comprising:
determining, by the IC controller, whether a first power path or a second power path is coupled to the IC controller, wherein the first power path comprises an external N-channel power-Field Effect Transistor (power-FET) and the second power path comprises an external P-channel power-FET;
turning and maintaining ON the external N-channel power-FET by the IC controller, when the first power path is determined as being coupled to the IC controller; and
turning OFF the external N-channel power-FET and turning and maintaining ON the external P-channel power-FET by the IC controller, when the second power path is determined as being coupled to the IC controller.
2. The method of claim 1 , further comprising turning OFF the external P-channel power-FET by the IC controller, when the second power path is determined as being coupled to the IC controller.
3. The method of claim 1 , wherein determining whether the first power path or the second power path is coupled to the IC controller comprises one of:
receiving a signal on an input of the IC controller;
uploading a firmware setting in the IC controller; and
performing voltage detection on one or more outputs of a gate-driver circuit of the IC controller.
4. The method of claim 1 , further comprising:
outputting, by a gate-driver circuit of the IC controller, a positive threshold voltage to turn ON the external N-channel power-FET; and
outputting, by the gate-driver circuit, a zero voltage to turn OFF the external N-channel power-FET.
5. The method of claim 1 , further comprising:
outputting, by a gate-driver circuit of the IC controller, a zero voltage to turn ON the external P-channel power-FET; and
outputting, by the gate-driver circuit, a high impedance to turn OFF the external P-channel power-FET.
6. The method of claim 1 , wherein the USB-enabled system is one of a laptop computer, a monitor, a hub, a wall charger, a smartphone, and a tablet.