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BA6458FP-Y Datasheet(PDF) 6 Page - Rohm |
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BA6458FP-Y Datasheet(HTML) 6 Page - Rohm |
6 / 8 page 608 Motor driver ICs BA6458FP-Y (7) I / O of hysteresis amplifiers ∗ Note that resistance values of the I/O circuits can vary ± 30% (2) Torque control The RNF-pin output voltage is plotted against the torque control input voltage (EC) in Fig. 10. (3) Start / stop pin The I / O equivalent circuit of the start / stop pin is shown in (1). 1) of “Precautions for use.” The pin has a tempera- ture dependence of *7mV/_C, and the resistance can vary ±30%. Take the temperature effect into consider- ation when designing your application. (4) Hall input The I / O equivalent circuit of the Hall input pins is shown in (1). 5) of “Precautions for use.” The Hall devices can be connected in either series or parallel. (5) Torque limit pin (pin 18) The output current can be limited by applying a voltage to the torque limit pin. Control is provided so that this pin will have the same potential as the power ground pin. Note that there is a voltage offset on this pin. The RNF-pin voltage is 0.325V when the TL-pin voltage is 0.4V (typi- cal) and the RNF-pin resistance is 0.5 Ω. Note that the volt- age offset changes with the RNF-pin resistance. (6) Amplifiers 1 and 2 Unpredictable outputs may occur when the amplifier in- put is outside the recommended range. (7) Hysteresis amplifier An input range of 0.6V to (VCC X 1.2V) is recommended. Unpredictable outputs may occur when the input is out- side this range. (8) Thermal shutdown circuit (TSD) The circuit puts the driver outputs (A1, A2, and A3) to the open state at the temperature of 175 _C (typical). There is a temperature difference of about 20 _C between the temperatures at which the circuit is activated and deacti- vated. |
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