Datasheet UCC3957M-3 - Texas Instruments IC, BATTERY MANAGEMENT, BICMOS, SSOP, 16

Detailed Description

Manufacturer: Texas Instruments

Description: IC, BATTERY MANAGEMENT, BICMOS, SSOP, 16

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Docket:
UCC3957 1, UCC3957 2, UCC3957 3, UCC3957 4
SLUS236B ­ JANUARY 1999 ­ REVISED SEPTEMBER 2002
THREE OR FOUR CELL LITHIUM ION PROTECTOR CIRCUIT
FEATURES DESCRIPTION
The UCC3957 is a BiCMOS three- or four-cell lithium-ion battery pack protector designed to operate with external P-channel MOSFETs.

Utilizing external P-channel MOSFETs provides the benefits of no loss-of-system ground in an overdischarge state, and protects the IC as well as battery cells from damage during an overcharge state. An internal state machine runs continuously to protect each lithium-ion cell from overcharge and overdischarge. A separate overcurrentprotection block protects the battery pack from excessive discharge currents. If any cell voltage exceeds the overvoltage threshold, the appropriate external P-channel MOSFET is turned off, preventing further charge current. An external N-channel MOSFET is required to level shift to this high-side P-channel MOSFET. Discharge current can still flow through the second P-

RoHS: Yes

Other Names:

UCC3957M3, UCC3957M 3