DW01A Battery Protection IC: Datasheet pdf, Schematic and Alternatives

The DW01A battery protection IC is designed to protect lithium-ion/polymer battery from damage or degrading the lifetime due to overcharge, over-discharge, and/or overcurrent for one-cell lithium-ion/polymer battery-powered systems, such as cellular phones.

The DW01A-ultra-small G's design and minimal exterior components make it perfect for integration into battery packs with limited space. The safe and full usage charging is ensured by the exact 50mV overcharging detection voltage. During storage, the very low standby current drains very little current from the battery.

DW01A Pinout

DW01A Functional Block Diagram

• Low supply current

• Overcharge detection voltage: 4.300±0.050 V

• Overcharge release voltage: 4.100±0.05 V

• Over-discharge detection voltage: 2.40±0.10 V

• Over-discharge release voltage: 3.00±0.10 V

• Over-current detection voltage: 150±30 mV

• Short circuit detection voltage: 1.35 V

• Delay time generated by the internal circuit

• Charger detection voltage: -0.7 V

• Reset resistor for overcurrent protection: >500KΩ

• Wide supply voltage range: 1.8 ~ 9.0 V

• SOT-23-6 package

AP9101Cxxx-ANTRG1 series, AP9101CAK6-ANTRG1

• Protection IC for One-Cell Lithium-Ion

• Lithium-Polymer Battery Pack

• Cellular phone

• PDA

• DSC

• Handheld devices

The circuit below shows how the DW01A chip is supposed to be used:

DW01A Typical Application Circuit

It is designed to be coupled to a battery pack as part of a single unit that includes the battery and the DW01A chip.

This is true because of the following:

The CS pin protects from reverse connecting of a charger.

Voltage limits for over and under voltage detection are outside normal charging / discharged levels. They are specified to be extreme values.

Latchup protection when a charger is connected under over-discharged conditions.

The operating current is so low it won't discharge the battery if left in place attached to the battery.

When used as part of a battery pack, it protects against the charger connected to BATT+ and BATT-, as well as reverse polarity protection from plugging in a charger the wrong way around or even plugging in a completely improper and dangerous charger, such as a NiCad or NiMh charger (do not try this).

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