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A7BE02AA Schematic ( PDF Datasheet ) - AnaSem

Teilenummer A7BE02AA
Beschreibung Single-cell Li-ion / Li-polymer Battery Protection IC
Hersteller AnaSem
Logo AnaSem Logo 




Gesamt 23 Seiten
A7BE02AA Datasheet, Funktion
AnaSem
Analog Semiconductor IC
A7B Series
Single-cell Li-ion / Li-polymer
Battery Protection IC
Rev. E09-06
AnaSem Inc.
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A7BE02AA Datasheet, Funktion
Rev. E09-06
Single-cell Li-ion / Li-polymer Battery Protection IC
A7B Series
ELECTRICAL CHARACTERISTICS
Items
Over-charge detection voltage
Vc = 4.0 to 4.5V
Over-charge hysteresis voltage
VHc = 0.0 to 0.4V
Over-discharge detection voltage
Vc = 2.0 to 3.0V
Charge over-current detection voltage
VIc = –0.25 to –0.05V
Discharge over-current detection voltage
VIdc = 0.05 to 0.40V
Load short-circuiting detection voltage
Symbol Min. Typ. Max.
Vc
VHc
Vdc
VIc
VIdc
Vshort
Detection voltage
Vc
–0.025
Vc
–0.030
VHc
–0.025
Vdc
×0.975
VIc
–0.030
VIdc
–0.020
Vc
Vc
VHc
Vdc
VIc
VIdc
Vc
+0.025
Vc
+0.030
VHc
+0.025
Vdc
×1.025
VIc
+0.030
VIdc
+0.020
–1.7 –1.3 –1.0
(Topr=25°C unless otherwise specified)
Conditions
Unit
Test
circuit
R1=330
R1=330
Topr = –5°C to +55°C 1)
R1=330
Based on VDD, VDD=3.5V
V1
V1
V1
V1
V2
V2
V2
Input voltage between VDD and VSS
0V battery charge starting charger voltage
0V battery charge inhibiting battery voltage
VDD
Vcha
Vinh
Input voltage
1.8 -
- 0.9
0.7 1.2
8.0
1.4
1.7
Internal operating voltage
A7BxxxxA
A7BxxxxB
V-
V3
V3
Current consumption on operation
Current consumption on shutdown
Current consumption
Iopr -
3.0 6.0 VDD=3.5V, VM=0V
Isdn -
- 0.1 VDD=VM=1.8V
μA 4
μA 4
CO : Pch ON resistance
CO : Nch ON resistance
DO : Pch ON resistance
DO : Nch ON resistance
Discharge over-current release resistance
Rcop
Rcon
Rdop
Rdon
Rdwn
Output resistance
1.5 3.0 4.5
0.5 1.0 1.5
1.7 3.5 5.0
1.7 3.5 5.0
15.0 30.0 60.0
CO=3.0V, VDD=3.5V, VM=0V
CO=0.5V, VDD=4.6V, VM=0V
DO=3.0V, VDD=3.5V, VM=0V
DO=0.5V, VDD=VM=1.8V
VDD=3.5V, VM=1.0V
K5
K5
K5
K5
K5
Over-charge detection delay time
tc=0.125s or 1.0s or 3.75s
Over-discharge detection delay time
tdc=31ms or 125ms
Charge over-current detection delay time
tic=8ms or 125ms or 1000ms
Discharge over-current detection delay time
Load short-circuiting detection delay time
tc
tdc
tic
tidc
tshort
Detection delay time
tc
×0.70
tc
tc
×1.30
tdc
×0.70
tdc
tdc
×1.30
tic
×0.70
tic
tic
×1.30
5.6 8.0 10.4
190 370 550
VDD=Vc-0.2VVc+0.2V,
VM=0V
VDD=Vdc+0.2VVdc-0.2V,
VM=0V
VDD=3.5V, VM=0V-1.0V
VDD=3.5V, VM=0V1.0V
VDD=3.5V, VM=0V3.5V
sec 6
msec 6
msec
msec
μsec
6
6
6
Release delay time
Release delay time 1
Over-discharge release
Charge over-current release
Discharge over-current release
Load short-circuiting release
Release delay time 2
Over-charge release
trel1 1.0
trel2 8.0
2.0
16.0
3.0
24.0
VDD=Vc+0.2VVc-0.2V,
VM=1.0V
Note :
1) The specification for this temperature range is guaranteed by design, not tested in production.
msec 6
msec 6
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A7BE02AA pdf, datenblatt
Rev. E09-06
Single-cell Li-ion / Li-polymer Battery Protection IC
A7B Series
z Over-charge detection
When the battery voltage (VDD) under the normal condition becomes equal to or higher than the over-charge
detection voltage (Vc) and that state is maintained during more than the over-charge detection delay time (tc),
this IC turns off the charge control FET and stops charge. This state is called the over-charge detection condition.
Release from the over-charge detection condition includes following three cases.
(1) When VDD falls to Vc-VHc without load and that state is maintained during more than the delay time 2 (trel2),
this IC turns on the charge control FET and returns to the normal condition.
* VHc : Over-charge hysteresis voltage
(2) When the load is installed and discharge starts, the discharge current flows through the internal parasitic
diode of the charge control FET. Then the VM terminal voltage rises to only the Vf voltage of the internal
parasitic diode from VSS potential. At this time, if the VM terminal voltage is higher than the discharge over-
current detection voltage (VIdc) and VDD is equal to or less than Vc, this IC returns to the normal condition
when this state continues more than the delay time 2 (trel2).
(3) In case (2), if the VM terminal voltage is higher than the discharge over-current detection voltage (VIdc) and
VDD is equal to or higher than Vc, battery is discharged until VDD becomes less than Vc, and then this IC
returns to the normal condition when this state continues more than the delay time 2 (trel2).
z Over-discharge detection
When the battery voltage (VDD) under the normal condition becomes equal to or less than the over-discharge
detection voltage (Vdc) and that state is maintained during more than the over-discharge detection delay time
(tdc), this IC turns off the discharge control FET and stops discharge. This state is called the over-discharge
detection condition. The over-discharge detection condition is released when the charger is connected and
following three cases are included.
(1) When the charger is connected and charge starts, the charge current flows through the internal parasitic
diode of the discharge control FET. VDD is higher than Vdc and that state is maintained during more than the
delay time 1 (trel1), this IC is released from over-discharge detection condition automatically and returns to
the normal condition.
(2) In case (1), if VDD is less than Vdc, this IC returns to the normal condition when VDD becomes equal to or
higher than Vdc and this state continues more than the delay time 1 (trel1).
(3) Although there is very little possibility, in case (1), if the VM terminal voltage is higher than the charge over-
current detection voltage (VIc) even if the charge current flows through the internal parasitic diode of the
discharge control FET, this IC returns to the normal condition when VDD becomes equal to or higher than
Vdc+VHdc and this state continues more than delay time 1 (trel1).
* VHdc = 0.4V (typical) ---- This voltage is tested in production, but is not specified.
This IC stops all internal circuits ( Shutdown condition ) after detecting the over-discharge and reduces current
consumption. ( Max 0.1µA, at VDD=1.8V )
z Charge to 0V battery
(1) 0V battery charge function
If the voltage of charger (the voltage between VDD and VM) is larger than the 0V battery charge starting
charger voltage (Vcha), 0V battery charge becomes possible when CO terminal outputs VDD terminal
potential and turns on the charge control FET.
(2) 0V battery charge inhibiting function
If the voltage of the battery (VDD) is equal to or less than the 0V battery charge inhibiting battery voltage
(Vinh), charge is inhibited when CO terminal outputs VM terminal potential and turns off a charge control FET.
AnaSem Inc.
11 .......... Future of the analog world

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