Single-Cell Battery Protection IC
with Integrated MOSFET
AOZ9004B
General Description
The AOZ9004B is a battery protection IC with integrated dual
common-drain N-channel MOSFET. The device includes accu-
rate voltage detectors and delay circuits, and is suitable for pro-
tecting single-cell lithium-ion / lithium-polymer rechargeable
battery packs from overcharge, over-discharge, and over-
current conditions.
The AOZ9004B is available in an 8-pin TSSOP package and is
rated over a -40°C to +85°C ambient temperature range.
Features
●
●
●
●
●
●
●
Integrated common-drain N-channel MOSFET
High-accuracy voltage detection circuit
◗
Overcharge detection accuracy ±25mV (+25°C), ±30mV
(-5°C to +55°C)
◗
Overcharge release accuracy ±50mV
◗
Over-discharge detection accuracy ±50mV
◗
Over-discharge release accuracy ±100mV
◗
Discharge over-current detection accuracy ±15mV
◗
Load short-circuit detection accuracy ±300mV
(AOZ9004BI), ±200mV (AOZ9004BI-01, 02, 03, and 04)
±20% accurate internal detection delay times
(external capacitors are unnecessary)
Charger connection pin withstands up to 28V
Wide operating temperature range -40°C to +85°C
Low current consumption
◗
3.0µA (Typ.), 5.5µA (Max.) in operation mode at
+25°C
Small 8-pin TSSOP package
Applications
●
●
Lithium-ion rechargeable battery packs
Lithium-polymer rechargeable battery packs
Typical Application
EB+
R1
220Ω
8
7
6
5
IC
Single-Cell
Lithium-Ion/
Lithium Polymer
Battery
C1
0.1μF
VDD
VM
IC
R2
2kΩ
AOZ9004B
VSS
1
IC
2
IC
3
OUTM
4
EB-
Figure 1. Typical Application
Rev. 1.2 August 2008
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Page 1 of 17
AOZ9004B
Ordering Information
Overcharge
Detection
Voltage
(V
CU
)
Overcharge
Release
Voltage
(V
CL
)
Over-
discharge
Detection
Voltage
(V
DL
)
Over-
discharge
Release
Voltage
(V
DU
)
Discharge
Over-
current
Threshold
(V
DIOV
)*
Charge
Over-
current
Threshold
(V
CIOV
)*
Part Number
0V Battery
Charge
Function
Shutdown
Function
AOZ9004BI
AOZ9004BI-01
AOZ9004BI-02
AOZ9004BI-03
AOZ9004BI-04
4.250V
4.275V
4.325V
4.280V
4.275V
4.05V
4.175V
4.075V
4.130V
4.075V
2.6V
2.3V
2.5V
2.8V
2.3V
2.9V
2.4V
2.9V
3.1V
2.3V
0.12V
0.10V
0.15V
0.15V
0.12V
N/A
-0.10V
-0.10V
-0.10V
-0.10V
No
Yes
No
No
Yes
No
Yes
Yes
Yes
Yes
* Please refer to Page 10 for calculation of charge and discharge current limit.
•
All AOS products are offered in packages with Pb-free plating and compliant to RoHS standards.
•
Parts marked as Green Products (with “L” suffix) use reduced levels of Halogens, and are also RoHS compliant.
Please visit
www.aosmd.com/web/quality/rohs_compliant.jsp
for additional information.
Table 1. Delay Time Combination
(1)
Overcharge
Detection Delay
Time (t
CU
)
1.2s
1.2s
143ms
1.2s
1.2s
Delay Time
Combination
1
(2)
2
(3)
3
4
5
(4)
Notes:
Over-discharge
Detection Delay
Time (t
DL
)
150ms
150ms
38ms
150ms
38ms
Discharge
Over-current
Detection Delay
Time (t
DIOV
)
9ms
9ms
18ms
18ms
9ms
Charge
Over-current
Detection Delay
Time (t
CIOV
)
9ms
9ms
9ms
9ms
9ms
Load
Short-circuiting
Detection Delay
Time (t
SHORT
)
560µs
300µs
300µs
300µs
300µs
1. The delay times can have the range specified in Table 2. Please contact our Sales department if you wish to order non-standard
values and for additional information.
2. Combination 1 is the default delay time combination for AOZ9004BI-02.
3. Combination 2 is the default delay time combination for AOZ9004BI, AOZ9004BI-01, and AOZ9004BI-03.
4. Combination 5 is the default delay time combination for AOZ9004BI-04.
Table 2. Delay Time Selection Range
(5)
Symbol
t
CU
t
DL
t
DIOV
t
CIOV
t
SHORT
Note:
5. The values in
Bold
are standard values. Please contact our Sales department if you wish to order non-standard values and for
additional information.
Delay Time
Overcharge detection delay time
Over-discharge detection delay time
Discharge over-current detection delay time
Charge over-current detection delay time
Load short-circuiting detection delay time
143ms
38ms
4.5ms
4.5ms
–
Selection Range
573ms
150ms
9ms
9ms
300µs
1.2s
300ms
18ms
18ms
560µs
Rev. 1.2 August 2008
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Page 2 of 17
AOZ9004B
Pin Configuration
VSS
IC
IC
OUTM
1
2
3
4
8
7
6
5
IC
VCC
VM
IC
TSSOP-8
(Top View)
Pin Description
Pin
Number
1
2
3
4
5
6
7
8
Pin Name
VSS
IC
IC
OUTM
IC
VM
VDD
IC
Pin Function
Ground. VSS is the source of the internal Discharge MOSFET N2 (Figure 1). Connect VSS directly
to the cathode of lithium-ion/lithium polymer battery cell.
Internally Connected Pin. This pin is for test purposes only.
Always leave this pin unconnected.
Internally Connected Pin. This pin is for test purposes only.
Always leave this pin unconnected.
Output Pin. OUTM is the source of the internal Charge MOSFET N1 (Figure 1). Connect OUTM
directly to the negative terminal of the battery pack.
Internally Connected Pin. This pin is for test purposes only.
Always leave this pin unconnected.
Over-current / Charger Detection Pin. Connect a 2kΩ resistor between VM and the negative
terminal of the battery pack.
Input Supply Pin. Connect a 0.1µF capacitor between VDD and VSS.
Internally Connected Pin. This pin is for test purposes only.
Always leave this pin unconnected.
Rev. 1.2 August 2008
www.aosmd.com
Page 3 of 17
AOZ9004B
Block Diagram
EB+
R1
220Ω
VDD
Over-
Discharge
Comp
Oscillator
Counter/
Logic
0V Battery
Charge
Function
Single-Cell
Lithium-Ion/
Lithium Polymer
Battery
VDD
C1
0.1μF
Over-Charge
Comp
VSS
Charger
Detection
Discharge
Over-Current
Comp
R
VDM
Charge
Over-Current
Comp
Short-Circuit
Comp
VM
R
VMS
R2
2kΩ
Battery Protection IC
N2
N1
OUTM
EB-
AOZ9004B
Dual Common-Drain MOSFET
Figure 2. AOZ9004B Function Block Diagram
Absolute Maximum Ratings
Exceeding the Absolute Maximum ratings may damage the device.
Parameter
V
DD
to V
SS
V
M
to V
DD
MOSFET Gate-to-Source Voltage
Continuous Drain Current
(4)
(R
θJA
= 95°C/W, T
A
= 25°C)
(R
θJA
= 95°C/W, T
A
= 85°C)
Pulsed Drain Current
Storage Temperature (T
S
)
Operating Temperature (T
A
)
Power Dissipation
(6)
(R
θJA
= 95°C/W, T
A
= 25°C)
(R
θJA
= 95°C/W, T
A
= 85°C)
Rating
-0.3V to +12V
-28V to +0.3V
-0.3V to +12V
5A
3A
30A
-55°C to +125°C
-40°C to +85°C
1.1W
0.5W
Note:
6. The value of R
θJA
is measured with the device mounted on 1-in
2
FR-4 board with 2-oz. copper, in a still air
environment with T
A
= 25°C. The value in any given application depends on the user’s specific board design.
Rev. 1.2 August 2008
www.aosmd.com
Page 4 of 17
AOZ9004B
Electrical Characteristics
T
A
= 25°C unless otherwise specified. Parameters specified over T
A
= -40°C to +85°C are guaranteed by design only and not
production tested.
Symbol
V
CU
Parameter
Overcharge Detection Voltage
T
A
= 25°C
Condition
Min.
V
CU
–0.025
V
CU
–0.03
V
CU
–0.060
V
CL
–0.05
V
CL
–0.08
V
CL
–0.025
V
CL
–0.06
V
DL
–0.05
V
DL
–0.11
V
DU
–0.10
V
DU
–0.15
V
DU
–0.05
V
DU
–0.11
V
DIOV
–0.015
V
DIOV
–0.021
0.9
0.7
0.3
0.16
-0.13
-0.14
Typ.
V
CU
V
CU
V
CU
V
CL
V
CL
V
CL
V
CL
V
DL
V
DL
V
DU
V
DU
V
DU
V
DU
V
DIOV
V
DIOV
1.2
1.2
0.5
0.5
-0.1
-0.1
Max.
V
CU
+0.025
V
CU
+0.03
V
CU
+0.040
V
CL
+0.05
V
CL
+0.065
V
CL
+0.025
V
CL
+0.04
V
DL
+0.05
V
DL
+0.13
V
DU
+0.10
V
DU
+0.19
V
DU
+0.05
V
DU
+0.13
V
DIOV
+0.015
V
DIOV
+0.024
1.5
1.7
0.7
0.84
-0.07
-0.06
Unit
V
DETECTION VOLTAGE
T
A
= -5°C to +55°C
T
A
= -40°C to +85°C
V
CL
Overcharge Release Voltage
V
CL
≠
V
CU
V
CL
= V
CU
V
DL
V
DU
Over-Discharge Detection
Voltage (2.0 to 3.0V, Adjustable)
Over-Discharge Release
Voltage (2.0 to 3.40V, Adjustable)
T
A
= 25°C
T
A
= -40°C to +85°C
V
DU
≠
V
DL
V
DU
= V
DL
V
DIOV
V
SHORT
Discharge Over-Current
Threshold
Load Short-Circuiting
Detection Voltage
T
A
= 25°C
T
A
= -40°C to +85°C
AOZ9004BI, T
A
= 25°C
AOZ9004BI, T
A
= -40°C to +85°C
AOZ9004BI-01/02/03/04, T
A
= 25°C
AOZ9004BI-01/02/03/04
T
A
= -40°C to +85°C
V
CIOV
Charge Over-Current Threshold
AOZ9004BI-01/02/03/04, T
A
= 25°C
AOZ9004BI-01/02/03/04
T
A
= -40°C to +85°C
0V BATTERY CHARGE FUNCTION
V
0INH
0V Battery Charge Inhibition
Battery Voltage (0V battery
charging function “unavailable”)
0V Battery Charge Starter
Battery Voltage (0V battery
charging function “available”)
Operating Voltage Between VDD
Pin and VSS Pin
Operating Voltage Between VDD
Pin and VM Pin
Current Consumption During
Operation
Current Consumption During
Over-Discharge
T
A
= 25°C
T
A
= -40°C to +85°C
T
A
= 25°C
T
A
= -40°C to +85°C
1.2
1.7
0.5
0.3
V
V
T
A
= 25°C
T
A
= -40°C to +85°C
T
A
= 25°C
T
A
= -40°C to +85°C
T
A
= 25°C
T
A
= -40°C to +85°C
T
A
= 25°C
T
A
= -40°C to +85°C
V
V
V
V
V
V
V
0CHA
INPUT VOLTAGE
V
DSOP1
V
DSOP2
Internal Circuit Operating Voltage
Internal Circuit Operating Voltage
1.5
1.5
8
28
V
V
INPUT CURRENT (No Shutdown Function)
I
OPE
I
OPED
V
DD
= 3.5V, V
VM
= 0V
T
A
= -40°C to +85°C
V
DD
= V
VM
= 1.5V
T
A
= -40°C to +85°C
1.0
0.7
0.3
0.2
3.0
3.0
2.0
2.0
5.5
6.0
3.5
3.8
µA
µA
Rev. 1.2 August 2008
www.aosmd.com
Page 5 of 17
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