 2015-2016 Microchip Technology Inc.

DS00001855D-page 29

USB5744

8.4.2.3

Port Power Control with Single Poly Fuse and Multiple Loads

Many customers use a single poly fuse to power all their devices. For the ganged situation, all power control pins must

be tied together.

8.4.3

PORT CONTROLLER CONNECTION EXAMPLE

FIGURE 8-6:

PORT POWER CONTROL WITH GANGED CONTROL WITH POLY FUSE

FIGURE 8-7:

USB5744 WITH 4 GENERIC PORT POWER CONTROLLERS (2 BC ENABLED)

Pull-Up Enable

USB

Device

Poly Fuse

5V

Pull-Up Enable

Pull-Up Enable

50k

50k

50k

PRTPWR

OCS

USB

Device

USB

Device

PRT_CTLx

PRT_CTLy

PRT_CTLz

USB5744

Port 1

Connector

Generic Port

Power Controller

POWER

(High Current)

(BC Enabled)

OCS

D+

D

-

VBUS

D+

D-

Port 2

Connector

Generic Port

Power Controller

POWER

(High Current)

(BC Enabled)

OCS

D+

D

-

VBUS

D+

D-

PRT_CTL2

PRT_CTL1

Port 3

Connector

Generic Port

Power Controller

POWER

OCS

D+

D

-

VBUS

D+

D-

PRT_CTL3

Port 4

Connector

Generic Port

Power Controller

POWER

OCS

D+

D

-

VBUS

D+

D-

PRT_CTL4