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BA6209N Datasheet(PDF) 5 Page - Rohm |
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BA6209N Datasheet(HTML) 5 Page - Rohm |
5 / 8 page 390 Motor driver ICs BA6209 / BA6209N FCircuit operation Input / output truth table Forward / reverse control, forced stop, and rush current absorption are controlled by the combination of FIN and RIN input states. (1) Forward / reverse control circuit When FIN is HIGH and RIN is LOW, current flows from OUT1 to OUT2. When FIN is LOW and RIN is HIGH, cur- rent flows from OUT2 to OUT1 (refer to the truth table). (2) Forced stop circuit By setting RIN and FIN both HIGH or both LOW, power supply to the motor is shut down and a brake is applied by absorbing the motor counter-electromotive force. (3) Rush current absorption circuit When a high voltage (caused by such as a motor rever- sal) is generated on OUT1 and OUT2, an internal comparator detects the high voltage and turns on an in- ternal circuit that absorbs rush currents. (4) Drive circuit The forward direction of the motor connected between OUT1 and OUT2 corresponds to the current flow from OUT1 to OUT2, and the reverse direction corresponds to the current flow from OUT2 to OUT1. The output voltage (VOUT) applied to the motor is given by the equation : VOUT (V) = VZD * VCE (sat.) = VZD * 0.2 (IOUT = 100mA) where VZD is the zener voltage of the constant voltage diode (ZD) connected to pin 4. If Vref is left OPEN, the output voltage (VOUT) is given by the equation : VOUT (V) = VCC1 * VCE (sat.) (PNP) * 2VF * VCE (sat.) = VCC1 * 1.8 (IOUT = 100mA) FPin descriptions |
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