Datasheet

ADP5062 Data Sheet

Rev. B | Page 16 of 44

INTRODUCTION

The ADP5062 is a fully-programmable I

C charger for single

cell lithium-ion or lithium-polymer batteries suitable for a wide

range of portable applications.

The linear charger architecture enables up to 2.1 A output

current at 4.3 V to 5.0 V (I

C programmable) on the system

power supply, and up to 1.3 A charge current into the battery

from a dedicated charger.

The ADP5062 operates from an input voltage of 4 V up to 6.7 V

but is tolerant of voltages of up to 20 V. The 20 V voltage tolerance

alleviates the concerns of the USB bus spiking during discon-

nection or connection scenarios.

The ADP5062 features an internal FET between the linear charger

output and the battery. This feature permits battery isolation

and, hence, system powering under a dead battery or no battery

scenario, which allows for immediate system function upon

connection to a USB power supply.

The ADP5062 is fully compliant with USB 3.0 and the USB

Battery Charging Specification 1.2. The ADP5062 is chargeable

via the mini USB VBUS pin from a wall charger, car charger, or

USB host port. Based on the type of USB source, which is detected

by an external USB detection device, the ADP5062 can be set to

apply the correct current limit for optimal charging and USB

compliance. The USB charger permits correct operation under

all USB compliant sources such as wall chargers, host chargers,

hub chargers, and standard host and hubs.

A processor can control the USB charger using the I

C to

program the charging current and numerous other parameters,

including

• Trickle charge current level

• Trickle charge voltage threshold

• Weak charge (constant current) current level

• Fast charge (constant current) current level

• Fast charge (constant voltage) voltage level at 1% accuracy

• Fast charge safety timer period

• Watchdog safety timer parameters

• Weak battery threshold detection

• Charge complete threshold

• Recharge threshold

• Charge enable/disable

• Battery pack temperature detection and automatic charger

shutdown