TB67H450FNG Calculation of Predefined Output Current This IC controls a motor operation by PWM constant current control. The peak current value (setting current value) can be determined by settings of the current-sensing resistor (RRS) and the reference voltage (Vref). Vref (V) Iout (max) = Vref (gain) × RRS (Ω) Vref (gain) : The Vref decay rate is 1 / 10.0 (typ.). Example: In case of 100% setting When Vref is 3.0 V and RRS is 0.51 Ω, the motor constant current (Peak current) is calculated as: Iout = 3.0 V / 10.0 / 0.51 Ω= 0.59 A If the constant current control function is disabled, the RS pin should be connected to GND, and the voltage (1 to 5V) is input to VREF pin. 10 2019-04-01
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