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Alpha & Omega Semiconductors

AOZ9250DI Datasheet Preview

AOZ9250DI Datasheet

Single-Cell Battery Protection IC

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AOZ9250DI
Single-Cell Battery Protection IC with Integrated MOSFET
General Description
The AOZ9250DI is a battery protection IC with
integrated dual common-drain N-channel MOSFET.
The device includes accurate voltage detectors and
delay circuits, and is suitable for protecting single-cell
lithium-ion/lithium-polymer rechargeable battery packs
from overcharge, over-discharge, and over-current
conditions.
The AOZ9250DI is available in a 2mm x 4mm 6-pin DFN
package and is rated over a -40°C to +85°C ambient
temperature range.
Features
Integrated Common-Drain N-Channel MOSFET
23.8m(typ.) source to source on resistance
High-accuracy voltage detection circuit
Overcharge detection accuracy: 25mV (25°C),
45mV (-10°C to 60°C)
Overcharge release accuracy: 40mV
Over-discharge detection accuracy: 100mV
Over-discharge release accuracy: 100mV
Discharge over-current detection accuracy: 10mV
Charge over-current detection accuracy: 15mV
20% accurate internal detection delay times
(external capacitors are unnecessary)
Charger connection pin withstands up to 24V
Wide operating temperature range: -40°C to 85°C
Low current consumption
2.8A (typ.), 5.0A (max.) in operation mode at
25°C
Small 2mm x 4mm 6-pin DFN package
Applications
Lithium-ion rechargeable battery packs
Lithium-polymer rechargeable battery
packs
Typical Applications Circuit
C1
0.1μF
VSS
OUTM
NC AOZ9250DI NC
EB+
R1
330Ω
VDD
VM
EB-
R2
1kΩ
Rev. 2.0 May 2014
www.aosmd.com
Page 1 of 16




Alpha & Omega Semiconductors

AOZ9250DI Datasheet Preview

AOZ9250DI Datasheet

Single-Cell Battery Protection IC

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AOZ9250DI
Ordering Information
Part Number
Over-
Overcharge Overcharge discharge
Detection Release Detection
Voltage
Voltage Voltage
(VCU)
(VCL)
(VDL)
Over-
discharge
Release
Voltage
(VDU1)
Over-
discharge
Release
Voltage
(VDU2)
Discharge Load Short- Charge
Over- circuiting Over-
current
Threshold
(VDIOV)*
Detection
Threshold
(VSHORT)
current Power 0V Battery
Threshold Down Charge
(VCIOV)* Function Function
AOZ9250DI 4.375V 4.175V 2.50V 2.90V 2.51V 0.11V
0.50V -0.10V No
Yes
AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.
Please visit www.aosmd.com/media/AOSGreenPolicy.pdf for additional information.
* Please refer to page 9 for calculation of charge and discharge current limit.
Table 1. Delay Time
Part Number
AOZ9250DI
Overcharge
Detection
Delay Time
(tCU)
1.0s
Over-discharge
Detection
Delay Time
(tDL)
64ms
Discharge
Over-current
Detection
Delay Time
(tDIOV)
8ms
Load Short-
circuiting
Detection
Delay Time
(tSHORT)
250s
Charge
Over-current
Detection
Delay Time
(tCIOV)
8ms
Pin Configuration
VSS 1
NC 2
VDD 3
PAD
2x4 DFN-6
(Top View)
6 OUTM
5 NC
4 VM
Pin Description
Pin Name
NC
VSS
VDD
VM
OUTM
PAD
Pin
Number
2, 5
1
3
4
6
Drain
Pin Function
Pin 2 is for test purposes only. Always leave pin 2 and pin 5 unconnected.
Ground. VSS is the source of the internal Discharge MOSFET. Connect VSS directly to the cathode
of lithium-ion/lithium polymer battery cell.
Input supply pin. Connect a 0.1F capacitor between VDD and VSS.
Over-current/Charger Detection Pin. Connect a 1kresistor between VM and the negative terminal
of the battery pack.
Output pin. OUTM is the source of the internal Charge MOSFET. Connect OUTM directly to the
negative terminal of the battery pack.
MOSFET Common-Drain Connection. This pad is for test purposes only. Always leave this pad
unconnected.
Rev. 2.0 May 2014
www.aosmd.com
Page 2 of 16


Part Number AOZ9250DI
Description Single-Cell Battery Protection IC
Maker Alpha & Omega Semiconductors
Total Page 16 Pages
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