The Future of Analog IC Technology
EV2681B-S-00A
CC/CV Controller
with Full Protection and Indication
EV2681B-S-00A Rev. 1.0
www.MonolithicPower.com
1
8/4/2016
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
DESCRIPTION
The MP2681B 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 MP2681B detects automatically the battery
cell through a battery ID resistor and regulates
the battery voltage according to the
corresponding cell configurations: 3S, 4S, and
5S. Then, the AC adapter output is regulated
automatically according to the chosen battery
configuration. 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 pre-set V
ID
values representing the battery
configuration. The MP2681B 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 back-up. The MP2681B
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.
ELECTRICAL SPECIFICATION
Parameter Symbol
Value
Units
Input Voltage
V
ACIN
85V-220V
V
Battery Voltage
V
BATT
0 to 21
V
VDD Voltage
V
SYS
5 to 30
V
Charge Current
I
CHG
0-4 A
FEATURES
Constant Voltage and Constant Current
Control
Pre-Charge Mode for Deep-discharged
Battery
Automatic Battery Cell Detection
Two 1MHz Bandwidth Operational Amplifier
Output Connected with OR Logic
Wide Input Voltage Range: 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
APPLICATIONS
Battery Charger for Portable Tools
Standalone Fast Charger
All MPS parts are lead-free, halogen 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.
