Copyright

© ANPEC Electronics Corp.

Rev. A.1 - Apr., 2012

APL3218

www.anpec.com.tw

1

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.

Li+ Charger Protection IC

(RoHS Compliant)

Features

Applications

General Description

Simplified Application Circuit

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

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.

Pin Configuration

ACIN 1

ACIN 2

VCDT 4

5 GATDRV

GND 3

8 OUT

7 OUT

6 CHR_LDO

TDFN2x2-8

(Top View)

= Exposed Pad (connected to ground

plane for better heat dissipation)

ACIN

GND

APL3218

PMIC

CHR_LDO

VCDT

GATDRV

OUT

5V

Adapter

VCDT

GATDRV

CHR_LDO

ISENS

VBAT

Li+

Battery

DFN3x3-8

(Top View)

ACIN 1

GND 3

8 OUT

ACIN 2

VCDT 4

7 OUT

5 GATDRV

6 CHR_LDO