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BA6288FS Datasheet(PDF) 5 Page - Rohm |
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BA6288FS Datasheet(HTML) 5 Page - Rohm |
5 / 8 page 449 Motor driver ICs BA6288FS FOperation notes (1) The quality of these products have been carefully checked; however, use of the products with applied volt- ages, operating temperatures, or other parameters that exceed the absolute maximum rating given may result in the damage of the IC and the product it is used in. If the IC is damaged, the short mode and open modes cannot be specified, so if the IC is to be used in applications where parameters may exceed the absolute maximum ratings, then be sure to incorporate fuses, or other physi- cal safety measures. (2) GND potential The potential for pin 1 must be kept lower than the poten- sials ofthe other pins regardless of the circumstances. (3) Input pins Voltage should never be applied to the input pins when the VCC voltage is not applied to the IC. Similarly, when VCC is applied, the voltage on each input pin should be less than VCC and within the guaranteed range for the electrical characteristics. (4) Back-rush voltage Depending on the ambient conditions, environment, or motor characteristics, the back-rush voltage may fluctu- ate. Be sure to confirm that the back-rush voltage will not adversely affect the operation of the IC. (5) Large current line Large currents are carried by the motor power supply and motor ground for these ICs. Therefore, the layout of the pattern of the PC board and the constants of certain parameters for external compo- nents, such as the capacitor between the power supply and ground, may cause this large output current to flow back to the input pins, resulting in output oscillation or other malfunctions. To prevent this, make sure that the PC board layout and external circuit constants cause no problems with the characteristics of these ICs. (6) Power dissipation The power dissipation will fluctuate depending on the mounting conditions of the IC and the ambient environ- ment. Make sure to carefully check the thermal design of the application where these ICs will be used. (7) Power consumption The power consumption by the IC varies widely with the power supply voltage and the output current. Give full consideration to the power dissipation rating and the thermal resistance data and transient thermal resistance data, to provide a thermal design so that none of the rat- ings for the IC are exceeded. (8) ASO Make sure that the output current and supply voltage do not exceed the ASO values. (9) Precautions for input mode switching To ensure reliability, it is recommended that the mode switching for the motor pass once through the open mode. (10) In-rush current There are no circuits built into these ICs that prevent in- rush currents. Therefore, it is recommended to place a current limiting resistor or other physical countermea- sure. (11) Factors regarding the thermal, power supply, and motor conditions If the potential of the output pin sways greatly and goes below the potential of ground, the operation of the IC may malfunction or be adversely affected. In such a case, place a diode between the output and ground, or other measure, to prevent this. |
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