AOZ9004B Datasheet, PDF (1/17 Pages) Alpha & Omega Semiconductors – Single-Cell Battery Protection IC with Integrated MOSFET

AOZ9004B
Single-Cell Battery Protection IC
with Integrated MOSFET
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
R1
220Ω
EB+
Single-Cell
Lithium-Ion/
Lithium Polymer
Battery
C1
0.1μF
8
7
6
5
IC VDD VM IC
AOZ9004B
R2
2kΩ
VSS IC
1
2
IC OUTM
3
4
EB-
Figure 1. Typical Application
Rev. 1.2 August 2008
www.aosmd.com
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