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TB6559FG Datasheet(PDF) 9 Page - Toshiba Semiconductor |
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TB6559FG Datasheet(HTML) 9 Page - Toshiba Semiconductor |
9 / 19 page TB6559FG 2013-04-10 9 (3) Changing the predefined current (during acceleration) Even when the reference voltage is increased, the regulator remains in Discharge mode for four CK cycles and then it enters Charge mode. The average current value becomes lower than the set current value because of the peak current detection method. It should be noted that the average current value changes, depending on the motor characteristics. Calculation of the Internal Oscillation Frequency The OSC oscillation frequency can be approximated by the following equation: fOSC [Hz] = (0.445 × 10-3) / COSC [F] Reference Voltage Generator In constant-current mode, the peak current is determined by the Vref voltage, as follows: IO = Vref/RSA × 1/6 [A] Vref/6 VRSA Discharge Internal clock OSC Discharge Charge GND Coil current VCC M IO OUT1 1/6 RSA Control circuit Vref IO OUT2 |
Similar Part No. - TB6559FG_13 |
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Similar Description - TB6559FG_13 |
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