AOZ1401DI Datasheet, PDF (1/14 Pages) Alpha & Omega Semiconductors – Li+ Charger Protection IC

AOZ1401DI
Li+ Charger Protection IC
General Description
The AOZ1401 is an integrated Li+ charger protection IC
that protects against input over-voltage, input over-
current, and battery over-voltage conditions. When the
device detects an input over-voltage condition, it
disconnects output from input by turning off the internal
MOSFET switch, preventing damage of the charger.
When the device detects a battery over-voltage
condition, it also turns off the internal MOSFET to prevent
battery from being over-charged. In the case of an over-
current condition, it limits the input current at the current
limit level set by an external resistor, and if the over-
current persists, it turns off the internal MOSFET after a
blanking period. The thermal shutdown feature adds
another layer of protection.
The fault status indicator provides status information
about fault conditions to the host.
The AOZ1401 is available in a 2mm x 2mm 8-pin DFN
package and is rated over a -40°C to +85°C ambient
temperature range.
Features
 Provides protection for three variables:
– Input over-voltage
– User-programmable input over-current
– Battery over-voltage
 30V maximum input voltage
 Supports up to 1.5A input current
 High immunity against false triggering due to voltage
spikes
 Robust against false triggering due to current
transients
 Thermal Shutdown
 Status indication, fault condition
 Available in space-saving small 8 lead 2x2 DFN
Applications
 Smart Phones
 PDAs
 MP3 Players
 Low-Power handheld devices
 Bluetooth headsets
Typical Application
VDC
AC Adaptor
1 VIN
C1
1µF
OUT 8
C2
1µF
Charger
AOZ1401
R4
100kΩ
VBAT 6
FAULTB 4
ILIM
7
R5
25kΩ
ENB 5
GND
2
R3
47kΩ
R1
47kΩ
R2
47kΩ
End
System
Rev. 1.0 August 2011
www.aosmd.com
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