APL3218 查看數據表（PDF） - Anpec Electronics

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APL3218

Li+ Charger Protection IC

Anpec Electronics 

APL3218

Li+ Charger Protection IC

Features

General Description

• Provide OUT Pin 5V Voltage Clamping Protection

• Thermal Charging Regulation Protection

• Provide Input Over-voltage Protection

• Provide Input Over-current Protection

• Provide Over Temperature Protection

• Provide Reverse Current Blocking

• High Immunity of False Triggering

• High Accuracy Protection Threshold

• Low On Resistance 0.75Ω Typ.

• Compact TDFN2x2-8 and DFN3x3-8 Packages

• Lead Free and Green Devices Available

(RoHS Compliant)

Applications

• Cell Phones

Pin Configuration

The APL3218 provides complete Li+ charger protection

against Input over-voltage, input over-current and over-

temperature. When any of the monitored parameters is

over the threshold, the IC turns off the charging current.

All protections also have deglitch time against false trig-

gering due to voltage spikes or current transients.

The APL3218 integrates a 5.5V LDO to prevent ACIN over-

shoot reaching CHR_LDO and OUT. When any transient

peak voltage above 5.5V presenting in ACIN pin, but be-

low OVP threshold, the internal LDO will clamp its output

at 5.5V. When ACIN voltage exceeds OVP threshold, the

device will turn off charging current. The charging current

is controlled by the GATDRV pin. When sourcing a cur-

rent from the GATDRV pin, the OUT pin delivers the charg-

ing current which is 200-fold magnified in amplitude

based on GATDRV’s current.

Other features include accurate V /V Voltage divider,

VCDT ACIN

reverse current blocking from OUT to ACIN and OTP

protection. The APL3218 provides complete Li+ charger

protections, and saves the external MOSFET and Schottky

diode for the charger of cell phone’s PMIC. The above

features and small package make the APL3218 an ideal

part for cell phones applications.

ACIN 1

ACIN 2

GND 3

VCDT 4

8 OUT

7 OUT

6 CHR_LDO

5 GATDRV

DFN3x3-8

(Top View)

ACIN 1

ACIN 2

GND 3

VCDT 4

8 OUT

7 OUT

6 CHR_LDO

5 GATDRV

TDFN2x2-8

(Top View)

= Exposed Pad (connected to ground

plane for better heat dissipation)

Simplified Application Circuit

5V

Adapter

ACIN CHR_LDO

APL3218

GATDRV

VCDT

OUT

GND

Li+

Battery

CHR_LDO

PMIC

GATDRV

VCDT

ISENS

VBAT

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and

advise customers to obtain the latest version of relevant information to verify before placing orders.

Copyright © ANPEC Electronics Corp.

1

Rev. A.1 - Apr., 2012

www.anpec.com.tw

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