Single-cell Li-ion / Li-polymer Battery Protection IC
Rev. E09-06
A7B Series
D
O
: Pch ON resistance, D
O
: Nch ON resistance --- [Circuit 5]
Set V1=3.5V, V2=0V and V4=3.0V. (V1-V4)/|ID
O
| is Pch ON resistance Rdop.
Set V1=V2=1.8V and V4=0.5V. V4/|ID
O
| is Nch ON resistance Rdon.
Discharge over-current release resistance --- [Circuit 5]
Set V1=3.5V, V2=0V at first. And then, set V2=1.0V.
V2/|IV
M
| is discharge over-current release resistance Rdwn.
Over-charge detection delay time, Release delay time 2 --- [Circuit 6]
Set V2=0V.
Increase V1 from the voltage Vc-0.2V to Vc+0.2V rapidly within 10μs.
Over-charge detection
delay time tc is the time needed for VC
O
to go "Low" just after the change of V1.
Next, set V2=1V and decrease V1 from Vc+0.2V to Vc-0.2V rapidly within 10μs. Over-charge release delay
time trel 2 is the time needed for VC
O
to go "High" just after the change of V1.
Over-discharge detection delay time, Release delay time 1 --- [Circuit 6]
Set V2=0V.
Decrease V1 from the voltage Vdc+0.2V to Vdc-0.2V rapidly within 10μs.
Over-discharge
detection delay time tdc is the time needed for VD
O
to go "Low" just after the change of V1.
Next, set V2=-1V and increase V1 from Vdc-0.2V to Vdc+0.2V rapidly within 10μs. Release delay time 1 trel1 in
case of over-discharge is the time needed for VD
O
to go "High" just after the change of V1.
Charge over-current detection delay time, Release delay time 1 --- [Circuit 6]
Set V1=3.5V and V2=0V.
Decrease V2 from 0V to -1V rapidly within 10μs. Charge over-current delay time tic
is the time needed for VC
O
to go "Low" just after the change of V2.
Next, increase V2 from -1V to 0V rapidly within 10μs. Release delay time 1 trel1 in case of charge over-current
is the time needed for VC
O
to go "High" just after the change of V2.
Discharge over-current detection delay time, Release delay time 1 --- [Circuit 6]
Set V1=3.5V and V2=0V.
Increase V2 from 0V to 1V rapidly within 10μs. Discharge over-current delay time
tidc is the time needed for VD
O
to go "Low" just after the change of V2.
Next, decrease V2 from 1V to 0V rapidly within 10μs. Release delay time 1 trel1 in case of discharge over-
current is the time needed for VD
O
to go "High" just after the change of V2.
Load short-circuiting detection delay time, Release delay time 1 --- [Circuit 6]
Set V1=3.5V and V2=0V.
Increase V2 from 0V to 3.5V rapidly within 10μs. Load short-circuiting detection
Release delay time 1 trel1 in case of load short-circuiting is the time needed for
delay time tshort is the time needed for VD
O
to go "Low" just after the change of V2. Next, decrease V2 from
3.5V to 0V rapidly within 10μs.
VD
O
to go "High" just after the change of V2.
7
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