MP2681

CC/CV Controller

with Full Protection and Indication

One Chip Solution for Power Tools Applications

MP2681 Rev.1.01

www.MonolithicPower.com

1

12/25/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2681 is a highly integrated Li-Ion or Li-

polymer switch mode battery charge controller

with full protection and status indication. This

part integrates a precision voltage reference

and charge status indications suitable for AC

adapter input and cradle charger applications.

The MP2681 automatically detects the battery

cell through a battery ID resistor and regulates

the

battery

voltage

according

to

the

corresponding cell configurations: 3S1P, 3S2P,

4S1P, 4S2P, 5S1P and 5S2P. Then, the AC

adapter output is automatically regulated

according to the battery configuration chosen.

Additionally, if the battery pack does not have

an ID resistor, the charge termination voltage

can be configured by setting a dedicated

voltage to the ID pin according to the six pre-set

values

representing

each

battery

configuration. The MP2681 charges the battery

in three phases: pre-charge, constant current

and constant voltage. Charge is terminated

when the current reaches a minimum set level.

An internal charge timer provides safety backup.

The MP2681 provides a fixed pre-charge mode

for deeply-discharged batteries and safety

features that include battery temperature

monitoring, NTC control, charge time-out and

fault control.

MP2681 is available in a 16-pin SOIC package.

FEATURES

• Constant Voltage and Constant Current

Control

• Pre-Charge Mode for Deeply-discharged

Battery

• Automatic Battery Cell Detection

• Two 1MHz Bandwidth Operational

Amplifiers Output Connected with OR Logic

• Wide Input Voltage Range: 4.5V to 30V

• Auto-Recharge

• Charge On/Off Control

• Programmable Internal Timer

• Battery Temperature Monitoring

• Charge Status Indication

• Power Line Fault Detection

• Over Temperature Protection

• 16-pin SOIC Package

APPLICATIONS

• Battery Charger for Portable Tools

• Standalone Fast Charger

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Quality Assurance. “MPS” and “The

Future of Analog IC Technology” are Registered Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION