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SI-7200M 数据表(PDF) 3 Page - Sanken electric |
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SI-7200M 数据表(HTML) 3 Page - Sanken electric |
3 / 5 page 48 SI-7200M Application Note s Determining the output current IO (motor coil current) The output current, IO is fixed by the following circuit elements: RS : Current detection resistor VCC-2 : Auxiliary supply voltage Based on the specifications of SI-7200M, its output current IO can be seen as: IO1 (effective value): 390 to 490mA To compute IO when different values are used for RS and VCC-2, use the approximation formula below or the graph at the right. The maximum ripple value IOH of the output current waveform is within the IOH(MIN) ~ IOH(MAX) range shown by the following formulas: 1 IOH(max) = (0.247xVCC-2–0.03) [A] RS 1 IOH(min) = (0.225xVCC-2–0.024) [A] RS To fine-adjust the output current, connect a 20K Ω variable resistor across pins 8 and 11. . . . . Waveform of output current 0 IOH s Power down mode The SI-7200M can be operated in power down mode. By pulling up pin 9 to high level IO can be reduced to 60% of the motor rotation current. s Operating voltage range The Sl-7200M can be used in applications (low coil resistance RL and high supply voltage VCC) where SI- 7200E and SI-7230E cannot be used. Output current vs. Current detection resistor 1.4 1.2 1.0 0.8 0.6 0.4 0.2 Current detection resistor Rs ( Ω) 01234 IOH (max)5V IOH (min)5V Power down output current vs. Current detection resistor 1.2 1.0 0.8 0.6 0.4 0.2 0 Current detection resistor Rs ( Ω) 01234 IOH2 (max)5V IOH2 (min)5V |
类似零件编号 - SI-7200M |
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类似说明 - SI-7200M |
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