Application circuit

AN2865

4/17

Doc ID 15283 Rev 1

2

Application circuit

The STUSBCD01B requires only five external components:

●

two capacitors to bypass the power supplies to ground

●

●

two series resistors on the DP/DM data lines

Figure 1 shows the typical application circuit for the STUSBCD01B.

The STUSBCD01B can operate in two different modes: hardware detection mode, which

does not require external control, and software detection mode. The user can choose

between two different detection methods: dedicated method and current sink method. More

details on each operating mode are provided in the following paragraphs. The operating

method input. See Table 1 for a summary of all operating conditions.

Figure 1.

STUSBCD01B application circuit

SHUTDOWN

STATUS/METHOD

/OE

DEF. METHOD

DP

GND

R1 = 470

Ω

R2 = 470

Ω

VBUS

D+

D-

GND

STUSBCD01

USB CHARGING

CONTROLLER

1V8V

DETECT

VBUS

100nF

R3 = 470

Ω

VBAT

V

IO

V

I/O

VBAT

USB PHY

(Transceiver)

DM DP VBUS

V

IO

100nF

C1

C2

A

B

USB

Receptacle

DM

SHUTDOWN

STATUS/METHOD

/OE

DEF. METHOD

DP

GND

R1 = 470

Ω

R2 = 470

Ω

VBUS

D+

D-

GND

STUSBCD01

USB CHARGING

CONTROLLER

1V8V

DETECT

VBUS

100nF

R3 = 470

Ω

VBAT

V

IO

V

I/O

VBAT

USB PHY

(Transceiver)

DM DP VBUS

V

IO

100nF

C1

C2

A

B

USB

Receptacle

DM