APL3225 Datasheet, PDF (1/15 Pages) Anpec Electronics Coropration – Li+ Charger Protection IC

APL3225
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 0.3Ω Typ.
• Compact TDFN2x2-8 and DFN3x3-8 Packages
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• Cell Phones
Pin Configuration
The APL3225 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 APL3225 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_VCDT/V_ACIN voltage divider,
reverse current blocking from OUT to ACIN and OTP
protection. The APL3225 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 APL3225 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
APL3225
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 - Nov., 2012
www.anpec.com.tw