DS2720CU Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated

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DS2720CU

Efficient, Addressable Single-Cell Rechargeable Lithium Protection IC

Dallas Semiconductor -> Maxim Integrated 

Figure 3. Li+ PROTECTION CIRCUITRY EXAMPLE WAVEFORMS

VDD

VPLS - VDD

CHARGE

ICELL

DISCHARGE

RECOVERY CHARGED THROUGH

CC

DC

POWER

MODE

tOVD

tON

tSCD

tUVD

tON

tUVD

tON

tOCD

tUVD

tUVD

OVER-

CURRENT OR

SHORT TEST

RECOVERY

CHARGE

SHORT-CIRCUIT

EVENT

OVERVOLTAGE

UNDERVOLTAGE

EVENT

EVENT

OVERCURRENT

EVENT

UNDERVOLTAGE

EVENT

SEVERE

DEPLETION

DS2720

VOV

VCE

VVUSCV

VCH

0

-VOC

0

-IOC

-ISC

VOHCP

VOLCC

VOHCP

VOLDC

ACTIVE

SLEEP

ACTIVE

INACTIVE

ENABLED

DISABLED

Notes:

IOC = Current that produces a voltage drop across FETs equal to VOC threshold.

ISC = Current drawn from the battery during short-circuit event. (Collapses the cell terminal voltage to VSC.)

Above example assumes FET on-resistance values such that the overcurrent threshold, VOC, is reached before the

short-circuit threshold, VSC.

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