UCC3952A-2

PARAMETER NAME:

UCC3952A-2

Cells Protected (max)

Overvoltage Threshold (V)

4.25

Protection FETs

Internal

Overcurrent Protection

Yes

Overcurrent Delay

Yes

Serial Bus

Shutdown Current (uA)

2.5

Target

Wireless phone, pager, PDA, consumer electronics

UCC3952A-2, Single Cell Lithium-Ion Battery Protection

IC W/Internal FET And Vov = 4.25V, BCC Package

DEVICE STATUS: ACTIVE

FEATURES:

Protects Sensitive Lithium-Ion Cells From Overcharging and Over-Discharging

Dedicated for One-Cell Applications

Integrated Low-Impedance MOSFET Switch and Sense Resistor

Precision Trimmed Overcharge and Overdischarge Voltage Limits

Extremely Low Power Drain

3.5-A Current Capacity

Overcurrent and Short-Circuit Protection

Reverse Charger Protection

Thermal Protection

DESCRIPTION:

The UCC3952A is a monolithic BiCMOS lithium-ion battery protection circuit designed to enhance the

useful operating life of a one-cell rechargeable battery pack. Cell protection features include internally

trimmed charge and discharge voltage limits, discharge current limit with a delayed shutdown, and an

ultra-low-current sleep mode state when the cell is discharged. Additional features include an on-chip

MOSFET for reduced external component count and a charge pump for reduced power losses while

charging or discharging a low-cell-voltage battery pack. This protection circuit requires one external

capacitor and can operate and safely shut down in a short circuit condition.