A4059
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
STANDALONE LINEAR LI-ION BATTERY CHARGER
WITH THERMAL REGULATION
DESCRIPTION
FEATURES
The A4059 is charging management circuit that can
be programmed through an external resistor
constant current / constant voltage charging. The
device includes an internal power transistor, does
not need external current sense resistor and
blocking diode in applications. A4059 requires
minimal external components, and meet the USB
bus specification, is very suitable for portable
applications in the field.
In the package allows the range of program-
mable charge current up to 1.2A above
No MOSFET, sense resistor or blocking diode
required
Complete linear charger in small package for
single cell lithium-ion batteries
Constant-current/constant-voltage
operation
with thermal regulation to maximize charge
rate without risk of overheating
Thermal modulation circuit can control the internal
chip temperature in a safe range when the device
power dissipation be relatively large or the ambient
temperature be higher. The output voltage can be
programmed by an external resistor. Charging
current is set by an external resistor. When the input
voltage (AC adapter or USB power supply) power is
lost, A4059 automatically enters a low power sleep
mode, then the battery current consumption is less
than 0.1μA. Built-in protection circuits against
irrigation, when the battery voltage is higher than
the input voltage, automatically turn off built-in
power MOSFET. Other features include low input
voltage latch, automatic recharge, the battery
temperature monitoring, Built - in OVP protection
and charge status / charge status indication
functions.
Charging voltage can be adjusted by the FB
Monitor output charge current
Charging status indicator and full status flag
3/10 charge current termination
Automatic recharge
40μA supply current in shutdown
0.7 times the programming voltage trickle
charge threshold voltage
Soft-Start limits inrush current
OVP protection function , the input is higher
than 6.8V, stop charging
Output with protection against anti-irrigation
When you unplug VIN , the IC does not con-
sume battery power
Available in PSOP8 Package
APPLICATION
Mobile phones
Digital Cameras
MP4 Player
Bluetooth applications
Electronic Dictionary
portable devices
all kinds of charger
Mobile power
The internal use of the patented technology is to
realize protecting reverse battery. When the battery
is reversed, stop charging, indicator
The A4059 is available in PSOP8 package.
ORDERING INFORMATION
Package Type
PSOP8
Part Number
A4059MP8R
A4059MP8VR
MP8
V: Halogen free Package
R: Tape & Reel
Note
SPQ: 3,000pcs / Reel
AiT provides all RoHS products
Suffix ꢀ V ꢀ means Halogen free Package
REV1.0 - OCT 2013 RELEASED -
- 1 -
AITSEMI [ AiT Semiconductor ]
