MEZS7-2SBoostCharger
2-Cell Li-Ion/Li-Polymer Switching
Charger for 5V Input & Integrated
Cell balance Solution Module
MEZS7-2SBoostCharger Rev. 1.1
www.MonolithicPower.com
1
8/20/2020
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2020 MPS. All Rights Reserved.
DESCRIPTION
The MEZS7-2SBoostCharger is a complete
solution module for charging and balancing two
Li-ion or Li-polymer series cells. The solution
includes the MP2639C battery charger with
integrated FETs, protection features, cell
balancing, and LED indicators for battery state of
charge.
When input power is present, the MEZS7-
2SBoostCharger charges a 2-cell series battery
with a 2.5A charge current and ensures the two
cells stay balanced.
The MEZS7-2SBoostCharger provides 4 LED
drivers to achieve the voltage-based fuel gauge
indication.
To guarantee safe operation, the MEZS7-
2SBoostCharger
has
input
over-voltage
protection, battery over-voltage protection,
thermal shutdown, JEITA battery temperature
monitoring, and a charge timer to prevent
prolonged charging of a dead battery. The
solution can also be configured to provide a
regulated 5V output back to the USB port in
discharge mode, in accordance with USB on the-
Go and USB Type-C specifications.
ELECTRICAL SPECIFICATIONS
Parameter
Symbol
Value
Units
Charge Mode
Input voltage range
V
IN
4 to 5.75
V
Charge-full voltage
V
BATT_FULL
8.4
V
Auto-recharge
Voltage
V
RECH
8
V
Charge current
I
CHG
2.5
A
Input current limit
I
IN_LIM
3
A
FEATURES
4V to 5.75V Input Voltage Range
Charges a 2-Cell Battery with a 5V Input
USB-Compliant Charger
Integrated Input Current Based and Input
Voltage Based Power Management
Function
Input Current at 3A and Input Voltage Limit
at 4.49V
2.5A Charge Current for 2-Cell Applications
8.4V Charge Voltage with 0.5% Accuracy
Negative Temperature Coefficient Pin for
JEITA Temperature Monitoring
Charge Timer Backup Protection
Thermal Regulation and Thermal Shutdown
4-LED Battery Level and Status Indication
Available in a QFN-26 (4mmx4mm)
Package
APPLICATIONS
Wireless Speakers
Gimbals
E-Cigarettes
Battery Backup Systems
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”, the MPS logo, and “Simple, Easy Solutions” are
trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
