MP2661 datasheet(1/35 Pages) MPS

Part #	MP2661

Description	4.65V System, 500mA,I2C-Controlled Battery Charger with Power Path Management for Single-Cell Li-Ion Battery

PDF	35 Pages

Scroll/Zoom	100%

Manufacturer	MPS [Monolithic Power Systems]

Direct Link	http://www.monolithicpower.com

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1 / 35 page

MP2661

4.65V System, 500mA,I2C-Controlled Battery

Charger with Power Path Management

for Single-Cell Li-Ion Battery

MP2661 Rev. 1.03

www.MonolithicPower.com

1

4/9/2018

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

The Future of Analog IC Technology

DESCRIPTION

The MP2661 is a highly integrated, single-cell,

Li-Ion/Li-Polymer battery charger with system

power path management for space-limited,

portable applications. The MP2661 uses input

power from either an AC adapter or a USB port

to supply the system load and charge the

battery independently. The charger features

trickle charge, constant current (CC) and

constant

voltage

(CV)

regulation,

charge

termination, and charge status.

The power path management function ensures

continuous

power

to

the

system

by

automatically selecting the input, the battery, or

both to power the system. This power stage

features a low dropout regulator from the input

to the system and a 100mΩ switch from the

battery to the system. Power path management

separates the charging current from the system

load, which allows for proper charge termination

and keeps the battery in full-charge mode.

The MP2661 provides system short-circuit

protection (SCP) by limiting the current from the

input to the system and the battery to the

system. This feature is especially critical to

prevent the Li-Ion battery from being damaged

by excessively high currents. An on-chip battery

under-voltage lockout (UVLO)cuts off the path

between the battery and the system if the

battery voltage drops below the programmable

battery UVLO threshold, which prevents the Li-

Ion battery from being over-discharged. An

integrated I2C control interface allows the

MP2661 to program the charging parameters,

such as input current limit, input voltage

regulation

limit,

charging

current,

battery

regulation voltage, safety timer, and battery

UVLO.

The

MP2661

is

available

in

a

9-pin

1.55mmx1.55mm WCSP package.

FEATURES

 Fully Autonomous Charger for Single-Cell

Li-Ion/Li-Polymer Batteries

 Complete Power Path Management for

Simultaneously Powering the System and

Charging the Battery

 ±0.5% Charging Voltage Accuracy

 12V Maximum Voltage for the Input Source

 I2C Interface for Setting Charging

Parameters and Status Reporting

 Fully Integrated Power Switches and No

External Blocking Diode Required

 Built-In Robust Charging Protection

Including Battery Temperature Monitoring

and Programmable Timer

 PCB Over-Temperature Protection (OTP)

 System Reset Function

 Built-In Battery Disconnection Function

 Thermal Limiting Regulation On-Chip

 Available in a WCSP-9 (1.55mmx1.55mm)

Package

APPLICATIONS

 Wearable Devices

 Smart Handheld Devices

 Fitness Accessories

 Smart Watches

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

MPS green status, please visit the MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

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