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BA3170 Datasheet

Part NameDescriptionManufacturer
BA3170 Trickle-charge IC for two-cell, lithium-ion batteries ROHM
ROHM Semiconductor ROHM
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The BA3170 is a trickle-charge IC developed for two-cell, lithium-ion batteries.The IC includes a charge control circuit, a charge output transistor, and an LED driver for showing the charging status.

Features
1) Output voltage can be varied using an external resistor.
2) The output pin is PNP output with low saturation voltage.
3) Built-in output current limiting circuit protects batteries from excessive current, and prevents destruction of the IC due to output shorts. The initial charge current is set to a low value (the cur rent limit pin voltage can be used to vary the current limit value).
4) Pulse charging at over 99% of the final voltage.
5) Built-in over-discharge battery return circuit.
6) Built-in charge fault protection circuit.
7) Built-in over-voltage battery operation circuit.
8) Built-in LED output for charge display (two outputs).
9) 12-pin power package provides large power dissipation in a compact package.
10) Temperature protection circuit prevents thermal de struction of the IC.

Applications
Lithium-ion (two cell) battery chargers, and charging circuits

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