MB39A125 Datasheet, PDF (31/64 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion Battery

MB39A125/126
■ SETTING THE CHARGE CURRENT
The charge current value can be set at the analog voltage value of the +INE1 terminal (pin 9) .
Charge current formula : Ichg (A) = V+INE1 (V) / (20 × RS1 (Ω) )
Charge current setting voltage : V+INE1 (V) = 20 × Ichg (A) × RS1 (Ω)
■ SETTING THE INPUT CURRENT
The input limit current value can be set at the analog voltage value of the +INE2 terminal (pin 3) .
Input current formula : IIN (A) = V+INE2 (V) / (20 × RS2 (Ω) )
Input current setting voltage : V+INE2 (V) = 20 × IIN (A) × RS2 (Ω)
■ SETTING THE TRIANGULAR WAVE OSCILLATION FREQUENCY
The triangular wave oscillation frequency can be set by the timing resistor (RT) connected to the RT terminal
(pin 17) .
Triangular wave oscillation frequency fosc
fosc (kHz) =: 14100 / RT (kΩ)
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