A7B datasheet(7/23 Pages) ANASEM

7 / 23 page

AnaSem Inc.

Rev. E09-06

A7B Series

Single-cell Li-ion / Li-polymer Battery Protection IC

.......... Future of the analog world

MEASUREMENT CONDITIONS

Over-charge detection voltage, Over-charge hysteresis voltage --- [Circuit 1]

Set V1=3.5V and V2=0V. Over-charge detection voltage Vc is V1 at which VCO goes "Low" from "High" when

V1 is gradually increased from 3.5V. Then IC is released from the over-charge state and VCO goes "High" from

"Low" at the voltage "Measured Vc-VHc" when V1 is gradually decreased.

If V2 is set to the greater value than discharge over-current detection voltage VIdc in the over-charge state, VHc

is canceled and then IC is released from the over-charge state at Vc.

Over-discharge detection voltage --- [Circuit 1]

Set V1=3.5V and V2=0V. Over-discharge detection voltage Vdc is V1 at which VDO goes "Low" from "High"

when V1 is gradually decreased from 3.5V. Next, set V2 under to charge over-current detection voltage VIc.

Then IC is released from the over-discharge state at Vdc and VDO goes "High" from "Low".

Charge over-current detection voltage --- [Circuit 2]

Set V1=3.5V and V2=0V. Charge over-current detection voltage VIc is V2 at which VCO goes "Low" from "High"

when V2 is gradually decreased from 0V.

Discharge over-current detection voltage --- [Circuit 2]

Set V1=3.5V and V2=0V. Discharge over-current detection voltage VIdc is V2 at which VDO goes "Low" from

"High" when V2 is gradually increased from 0V.

Load short-circuiting detection voltage --- [Circuit 2]

Set V1=3.5V and V2=0V. Load short-circuiting detection voltage Vshort is V2 at which VDO goes "Low" from

"High" within a time between the minimum and the maximum value of load short-circuiting detection delay time

tshort, when V2 is increased rapidly within 10μs.

0V battery charge starting charger voltage --- [Circuit 3]

Set V1=V2=0V and decrease V2 gradually. 0V battery charge starting charger voltage Vcha is V2 when VCO

goes "High" ( V1-0.1V or higher ).

0V battery charge inhibiting battery voltage --- [Circuit 3]

Set V1=1.8V and V2=0V at first. Then set V2=V1-4.0V. Next, decrease V1 and V2 gradually, maintaining the

relation of V2=V1-4.0V. 0V battery charge inhibiting battery voltage Vinh is V1 when VCO goes "Low" ( V2+0.1V

or lower ).

Current consumption on operation and shutdown --- [Circuit 4]

Set V1=3.5V and V2=0V on normal condition. IDD shows current consumption on operation Iopr.

Set V1=V2=1.8V on over-discharge condition. IDD shows current consumption on shutdown Isdn.

CO : Pch ON resistance, CO : Nch ON resistance --- [Circuit 5]

Set V1=3.5V, V2=0V and V3=3.0V. (V1-V3)/|ICO| is Pch ON resistance Rcop.

Set V1=4.6V, V2=0V and V3=0.5V. V3/|ICO| is Nch ON resistance Rcon.

A7B Datasheet(PDF) 7 Page - AnaSem Hong Kong Limited.