APL3205A datasheet(13/20 Pages) ANPEC

tên linh kiện	APL3205A

Giải thích chi tiết về linh kiện	Li Charger Protection IC

PDF	20 Pages

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nhà sản xuất	ANPEC [Anpec Electronics Coropration]

Trang chủ	http://www.anpec.com.tw

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13 / 20 page

Rev. A.3 - Jun., 2011

www.anpec.com.tw

APL3205A/B

Function Description (Cont.)

Figure3. OVP Timing Chart

B(IN)

OUT

ON(OVP)

OVP

POR

FAULT

Powering an Accessory Device

In some applications, such as USB On-The-Go, users need to power an accessory device by using the portable

device’s battery through the jack holes of AC adapter. The APL3205 provide reverse current flow path from OUT to IN.

If V

OUT > VPOR + 0.7V, FET Q1 is turned on, and the reverse current does not flow through the diode but through Q1. Q1

will then remain ON as long as V

OUT > VPOR-VPOR_HYS + RDS_ON*ISUPPLY. Within this voltage range, the reverse current

capability is the same as the forward capability, 1.5A. It should be noted that there is no overcurrent protection in this

direction.

APL3205

Charger

Battery

Accessory

Power Supply

to system

Enable

Disable

Jack

Accessory

Device

Portable

Device

OUT

Gate

Driver and

Logic

Control

ISUPPLY

VOUT

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