NCP4371

www.onsemi.com

13

Table 5. CURRENT LIMIT OPTION REFERENCE VOLTAGE

Current Limit Option

A

B

C

D

E

F

G

H

14

17

22

28

33

38

44

57

Soft Short−Circuit Protection

In case of a short−circuit at the USB cable end or the

portable device USB receptacle it is desired to limit the short

circuit current to prevent a portable device or cable from a

damage. The NCP4371 offers an extended region of output

pins are shorted. No further commands from the portable

device are accepted. The only feature enabled is the output

current limiting at the moment. The device stays in the

threshold. The device logic will resume its operation and

goes to a default BC1.2 compatible mode. A new negotiation

between the charger and portable device has to be carried out

in order to enable HVDCP compatibility mode.

Discharge

the discharge circuitry discharges the output capacitors to

reach the new voltage level in a short time. As well, the

discharge circuitry is activated if cable unplug event is

detected. The NCP4371 features two discharge paths. By

default, the discharge is done via built−in regulated current

source at VCC pin. If the VCC pin discharge capability is not

The discharge resistor is wired from a positive pole of the

output capacitor to the DISCHARGE pin. The minimum

W.

The DISCHARGE pin has an internal protection for a case

detected the discharge MOSFET at the pin is turned off. It

is highly recommended to use an external discharge resistor

always if Class B device is used. In case of Class A device

mF the DISCHARGE pin can be left

disconnected.

Table 6. DEVICE OPTIONS

OPN #

NCP4371___DR2G

Marking

QuickCharge

Class A/B

Power Limit

Current Limit (mV)

A

B

A

B

C

A

B

C

D

E

F

G

H

Class A

Class B

Class A Class A&B No Power

Limit

14

17

22

28

33

38

44

57

NCP4371AACDR2G

4371AAC

X

X

X

NCP4371AAEDR2G

4371AAE

X

X

X

NCP4371AADDR2G

4371AAD

X

X

X

NCP4371ACCDR2G

4371ACC

X

X

X

NCP4371BBEDR2G

4371BBE

X

X

X

ORDERING INFORMATION

Device

Marking

Package

NCP4371AACDR2G

NCP4371AAEDR2G

NCP4371AADDR2G

NCP4371ACCDR2G

NCP4371BBEDR2G

4371AAC

4371AAE

4371AAD

4371ACC

4371BBE

SOIC−8

Pb−Free

2500 / Tape & Reel

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.