AP1212(2010) 查看數據表（PDF） - Diodes Incorporated.

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AP1212
(Rev.:2010)

DUAL USB HIGH-SIDE POWER SWITCH

Diodes Incorporated. 

NOT RECOMMENDED FOR

NEW DESIGN PLEASE USE

AP2146 OR AP2156

AP1212

DUAL USB HIGH-SIDE POWER SWITCH

Features

• Compliant to USB specifications

• Dual independent switches control

• 2.7V to 5.5V input voltage

• 500mA minimum continuous current per port

• 110mΩ typical on-resistance

• 1.25A maximum short circuit current limit

• Independent open-drain fault flag pins

• 110μA typical on-state supply current

• 1μA typical off-state supply current

• Output can be forced higher than input (off-state)

• Thermal shutdown

• 2.4V typical under voltage lockout (UVLO)

• 1ms turn-on (soft-start) and fast turn-off

• Enable active-high (H) or active-low (L)

• SOP-8L: Available in “Green” Molding Compound

(No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 1)

General Description

The AP1212 series are dual integrated high-side power switch

with independent enable and flag functions, optimized for

self-powered and bus-powered Universal Serial Bus (USB)

applications. The AP1212 series support the following

USB requirements: each switch channel supplies up to 500mA as

required by USB downstream devices; the switch’s low

on-resistance meets USB voltage drop requirements; fault

current is limited to typically 1000mA, well below the

UL 25VA safety requirements; and a flag output is available to

indicate fault conditions to the local USB controller. Soft start

eliminates the momentary voltage drop on the upstream port that

may occur when the switch is enabled in bus-powered

applications.

Additional features include thermal shutdown to prevent

catastrophic switch failure from high-current loads, under voltage

lockout (UVLO) to ensure that the device remains off unless there

is a valid input voltage present, and 3.3V and 5V logic compatible

enable inputs.

Applications

• USB hubs

• Hot plug-in power supplies

• Battery-charger circuits

Typical Application Circuit

Power

Supply

3.3V

5V

7

IN

0.1uF

AP1212

8

OUT1

USB

Control

2 FLG1

1

EN1

3

4 FLG2

EN2

5

OUT2

GND

6

Downstream

USB Ports

0.1uF

D+

D-

ferrite bead

VBUS

33uF

GND

ferrite bead

0.1uF

D+

D-

ferrite bead VBUS

33uF

GND

ferrite bead

AP1212 Rev. 8

DS31019

1 of 12

www.diodes.com

NOVEMBER 2010

© Diodes Incorporated

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