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
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Integrated common-drain N-channel MOSFET
High-accuracy voltage detection circuit
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Overcharge detection accuracy ±25mV (+25°C), ±30mV
(-5°C to +55°C)
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Overcharge release accuracy ±50mV
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Over-discharge detection accuracy ±50mV
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Over-discharge release accuracy ±100mV
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Discharge over-current detection accuracy ±15mV
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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
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3.0µA (Typ.), 5.5µA (Max.) in operation mode at
+25°C
Small 8-pin TSSOP package
Applications
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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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