TB67H450FNG Motor control (Constant current control)Current waveform in Mixed Decay Mode and the setting In case of constant current control, the OFF time (toff) is fixed to determine the current ripple (pulsating), and the rate of Mix Decay Mode is 50 % in Fast Mode, and 50% in Slow mode. toff (fixed) toff / 2 toff / 2 NF detection NFth Charge Iout Fast Charge Slow Charge Mode -> NF detection: Reaches setting current value -> Fast Mode -> Mixed Decay Timing -> Slow Mode -> Charge Mode If the output current is zero-detected during Fast mode, the output becomes High impedance. Waveform in Mixed Decay Mode (Current waveform) Toff (fixed) Toff (fixed) Toff / 2 Toff / 2 Toff / 2 Toff / 2 NF detection NF detection NFth Iout MDT (Mixed Decay Timing) Timing charts may be simplified for explanatory purposes. 8 2019-04-01
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