US 10,855,069 B2 · USB type-C/PD controller having integrated VBUS to CC short protection

Abstract

A USB Type-C/Power Delivery controller chip includes a first pin for receiving a first voltage, a second pin for receiving a second voltage, and a third pin for coupling to the CC pin of a USB connector. The USB controller chip includes a VCONN power supply circuit having a blocking field effect transistor (BFET) coupled in series with a hot-swap field FET (HSFET) between the first and third pins, and first and second Zener diodes coupled anode-to-anode between the HSFET's source and gate. A cable detection circuit includes a BFET coupled between the second and third pins, and a Zener diode coupled between the BFET's gate and a lower rail. A power delivery physical layer circuit includes a receiver and a transmitter, each coupled to the third pin through a respective BFET, the respective BFETs each having a Zener diode coupled between respective gates and the lower rail.

Claims15

Dependent claims

A Universal Serial Bus (USB) Type-C/Power Delivery (PD) controller chip comprising:

a first pin adapted to receive a first voltage from a host device;
a second pin adapted to receive a second voltage;
a third pin adapted to be coupled to a configuration control (CC) pin of a USB connector;
a VCONN power supply circuit coupled to selectively pass the first voltage to the third pin, the VCONN power supply circuit including a first blocking field effect transistor (BFET) coupled in series with a hot-swap field effect transistor (HSFET) between the first pin and the third pin, and a first Zener diode and a second Zener diode coupled anode-to-anode between a source and a gate of the HSFET;
a cable detection circuit including a second BFET coupled between the second pin and the third pin, and a third Zener diode coupled between a gate of the second BFET and a lower rail;
and
a power delivery physical layer circuit including a receiver and a transmitter, the receiver being coupled to the third pin through a third BFET, the transmitter being coupled to the third pin through a fourth BFET, a fourth Zener diode coupled between a gate of the third BFET and the lower rail and a fifth Zener diode coupled between a gate of the fourth BFET and the lower rail.

4 more elements

A dynamic hot swap keep-off circuit for a hot swap field effect transistor (HSFET) in a VCONN power supply circuit of a Universal Serial Bus (USB) Type-C/Power Delivery (PD) controller chip having a first pin for coupling to a power supply and a second pin for coupling to a configuration control (CC) pin of a USB connector, the dynamic hot swap keep-off circuit comprising:

a first Zener diode and a second Zener diode coupled anode-to-anode between a source and a gate of the HSFET;
a first P-type metal oxide silicon (PMOS) transistor including a source coupled to the source of the HSFET and a drain coupled between the anodes of the first and second Zener diodes;
and
a second PMOS transistor coupled in series with a third PMOS transistor between the source and the gate of the HSFET.

1 more element

Dependencies are inferred from the claim text.

USB type-C/PD controller having integrated VBUS to CC short protection

Life of this patent

USB type-C/PD controller having integrated VBUS to CC short protection

Life of this patent

Abstract

Claims15