A4057
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
LINEAR LI-ION BATTERY CHARGER
DESCRIPTION
FEATURES
A4057 series is a double lithium battery charge
management chip. The chip includes a charge state
detection, the charging process, temperature
detection and so on. The chip also integrates a
high-precision reference voltage module in it.
A4057 charge contains three modes: precharge,
constant current charging, constant voltage
charging. Constant current charging current is five
times the pre-charge current; when the voltage is
lower than 6.5V into the precharge mode; when the
voltage is above 6.5V into the constant current
charge mode, the charging current is five times as
the precharge, the charging current is determined by
an external resistor.
Double lithium battery charge management
Only need a few external components
Pre-charge, constant current charging , constant
voltage charging mode
Temperature detection
Two charging status
Available in SOP8 Package
APPLICATION
Digital camera
PDAS
The phone lithium battery
TYPICAL APPLICATION
The A4057 is available in SOP8 package.
ORDERING INFORMATION
Package Type
Part Number
A4057M8R-XX
A4057M8VR-XX
SOP8
M8
SPQ: 3,000pcs/Reel
Note: D1 is a Schottky; RS has been suggested that
high-precision ( 1% ) in order to ensure current
accuracy, R1 and R2 is not required precision.
XX: Output Voltage
84=8.4V
Note
V: Halogen free Package
R: Tape & Reel
AiT provides all RoHS products
REV1.1
- FEB 2014 RELEASED, OCT 2017 UPDATED -
- 1 -
AITSEMI [ AiT Semiconductor ]
