The MC33351A is a monolithic battery protection circuit that maximizes
capacity and battery life and protects against hazardous over-voltage
and over-current condition. It is designed specifically for three cell
lithium-ion battery pack in laptop computer applications. The
MC33351A features a cell-balancing feature that overcomes the
typical situation where each battery cell has a slightly different rate
of char ge and dischar ge, leading to an unbalanced situation and a
reduction in capacity for the entire pack. Other features of the
MC33351A include a selectable cell voltage and a selectable charge
interrupt voltage sensing mode. The device is housed in a low profile
TSSOP-20 package.
• Selectable Char ge Inter r upt Sensing Mode for Pr ecise Cell
Voltage Measurements
• Programmable Over-Voltage Delay
• Choice of Cur rent Limit Sensing Elements
◆(Low-Side Resistor or High-Side MOSFET Switches)
• Programmable Discharge Cur r ent Limit Threshold and
Shutdown Delay
• Selectable Cell Voltage Balancing
• Virtually Zero Cur r ent Sleepmode State when Cells are
Discharged
• Minimum Exter nal Components for Inclusion with Battery Pack
• Low Profile TSSOP-20 Package
• Maximizes Cell Capacity and Cycle Life
• Selectable Cell Balancing
◆Povides Higher Storage Capacity
• Protects Against Hazar dous Over-Voltage and Over-Cur r ent
Conditions
• Virtually Zero Cur r ent Sleepmode State when Cells are
Discharged
• Space and Cost Savings
◆Minimum Exter nal Components for Inclusion in Battery Pack
◆Low Profile, Surface Mount TSSOP-20 Package
Overview
Features
New Pr oduct
Fact Sheet
NPFSMC33351A/D
Rev. 0, September-2000
Benefits
© Semiconductor Components Industries, LLC 2000
MC33351A – Lithium Batter y Pr otection Cir cuit
for Thr ee Batter y Packs
A complete data sheet containing full specifications, is available
through ON Semiconductor’s Literatur e Distribution Center or at
onsemi.com/pub/mc33351A
Literature
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PUBLICATION ORDERING INFORMATION
For additional information, please contact your local Sales
Representative
NPFSMC33351A/D
Part Number Package
MC33351ADTB-1 TSSOP-20
MC33351ADTB-1R2 TSSOP-20
MC33351A – Lithium Batter y Pr otection Cir cuit
for Thr ee Batter y Packs
•Lithium Battery Packs
•Three Cell Rechar geable Battery Packs
•Laptop Computers
Applications
Or dering Infor mation
