with Full Protection and Indication
The Future of Analog IC TechnolOognye Chip Solution for Power Tools Applications
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
VID 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
MP2681 is available in a 16-pin SOIC package.
• Constant Voltage and Constant Current
• Pre-Charge Mode for Deeply-discharged
• Automatic Battery Cell Detection
• Two 1MHz Bandwidth Operational
Amplifiers Output Connected with OR Logic
• Wide Input Voltage Range: 4.5V to 30V
• Charge On/Off Control
• Programmable Internal Timer
• Battery Temperature Monitoring
• Charge Status Indication
• Power Line Fault Detection
• Over Temperature Protection
• 16-pin SOIC Package
• 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.
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