A4059
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
STANDALONE LINEAR LI-ION BATTERY CHARGER
WITH THERMAL REGULATION
PIN DESCRIPTION
Top View
Pin #
1
Symbol
TEMP
Function
The TEMP pin to the battery of the NTC sensor output. If the TEMP pin voltage is
less than the input voltage of 30% or greater than 60% of the input voltage means
the battery temperature is too low or too high, then the charge will be suspended. If
the TEMP input voltage between 30% and 60%, then the battery fault condition will
be cleared, the charge will continue. If you want to shield this feature ,you can
connect the PIN to GND.
Charge current programming, charge current monitoring and close pin. Charge
current is controlled by a resistor of precision of 1% to the ground. In the constant
charge current state, this port provides 1V voltage. In all conditions, this port
charge current can be calculated using the following formula:
IBAT = (VISET/RISET) ×1000
ISET port can also be used to turn off the charger. Resistance to side with the
separation of programming can pull the 3μA current source to increase ISET port
voltage. When the suspension reached the limit voltage 1.21V, the device enters
stop state, after charging the input current drop to 25μA. This port pinch-off voltage
is about 2.4V. If supply this port voltage more than pinch-off voltage, the current
will be 1.5mA. Through combination ISET pin to the ground, the charger will back
to normal.
2
ISET
3
4
GND
VIN
Ground terminal .The EXPOSED pin is also connected with pin 3.
Supply positive input voltage. Power supply for the charger. VCC can be 4.25V to
6.5V and must have at least 1F bypass capacitor. If the BAT pin voltage of VCC
down to within 30mV, A4052 into the suspension state, and make BAT Current
less than 2A.
REV1.0 - OCT 2013 RELEASED -
- 2 -
AITSEMI [ AiT Semiconductor ]
