UCC3952-2

PARAMETER NAME:

UCC3952-2

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

UCC3952-2, Single Cell Lithium-Ion Battery

Protection IC W/Internal FET And Vov = 4.25V

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-A Current Capacity

Overcurrent and Short-Circuit Protection

Reverse Charger Protection

Thermal Protection

DESCRIPTION:

The UCC3952 monolithic BiCMOS lithium-ion battery protection circuit increases 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.