充電電流1-250mA，TDFN1*1-6封裝，世界最小充電芯片，涓流充電門限2.5V-2.9V可選，適用于智能穿戴式產(chǎn)品，比如掛脖耳機(jī)，TWS耳機(jī)，智能卡，常用于搭配BES主控使用。
GENERAL DESCRIPTION
The HP4059 series of devices are highly integrated Li-Ion
and Li-Pol linear chargers targeted at small capacity
battery for portable applications. It is a complete
constant-current/ constant voltage linear charger. No
external sense resistor is needed, and no blocking diode
is required due to the internal MOSFET architecture. It
can deliver up to 300mA of charge current (using a good
thermal PCB layout) with a final float voltage accuracy of
±1%. The charge voltage is fixed at 4.2V or 4.35V, and
the charge current can be programmed externally with
a single resistor. The charger function has high accuracy
current and voltage regulation loops and charge
termination.
The HP4059 automatically terminates the charge cycle
when the charge current drops to 1/10 the programmed
value after the final float voltage is reached.
When the input supply (wall adapter or USB supply) is
removed, the HP4059 will shut off, only 40nA leakage
current coming from battery at sleep mode when
ambient temperature is 85℃, so it can save energy and
improve standby time.
The HP4059 is available in a small package with
DFNWB1X1-6L.
Standard product is Pb-Free and
Halogen-free.
FEATURES
Charging
-
1% Charge Voltage Accuracy
-
5% Charge Current Accuracy
-
Support Application for Very Low Charge Currents –
1mA to 300mA
-
Support minimum 0.1mA Charge Termination
Current
-
45nA Maximum Battery Output Leakage Current @
0℃~85℃
-
High Voltage Chemistry Support: up to 4.35V
Others
-
Output Short-Circuit Protection
-
Soft-Start Limits Inrush Current
-
Charge Status Output Pin
-
Automatic Recharge
