DESCRIPTION

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.

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.

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.

FEATURES

 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

 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