BA3170 Rohm Semiconductor, BA3170 Datasheet

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... Regulator ICs Trickle-charge IC for two-cell, lithium-ion batteries BA3170 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. FApplications Lithium-ion (two cell) battery chargers, and charging circuits ...

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... Regulator ICs FBlock diagram 396 BA3170 ...

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... Regulator ICs FPin descriptions FElectrical characteristics (unless otherwise noted 25_C 12V 58. 10k ) BA3170 397 ...

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... For the output capacitor C1, use a tantalum capacitor with low capacitance variation with temperature, and a static capacitance tolerance of 10% or less. (3) For the timing capacitor CT, use a film capacitor with low capacitance variation with temperature, a static capaci- tance tolerance of 10% or less, and a temperature variation rate less. FMeasurement circuit 398 Fig.1 BA3170 ...

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... FExternal components Setting the “end point voltage” Fig.3 Fig.2 Set the “end point voltage” Vbuf using resistors R1 and R2. Example: To set Vbuf to 8.4V: 1. (R1 ) R2 10k , then R1 = 58.7k For measurement of the electrical characteristics, Vref and Vbuf are shorted. BA3170 399 ...

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... Notes regarding power dissipation (Pd) A derating characteristic is provided for power dissipa- tion. Your design should not require the component to dissipate more than its maximum allowed power dissipa- tion over the operating temperature range. BA3170 ...

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... ASO conditions are nev- er exceeded. (10) Great care has been paid to the quality of this com- ponent. However, due to the nature of lithium-ion batter- ies, if there is a risk of danger due to failure of this compo- nent (e.g. fire or explosion), be certain to take appropriate measures in your design (fuses etc.). CC BA3170 401 ...

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... Regulator ICs FExternal dimensions (Units: mm) 402 BA3170 ...