LB1821 pre-driver equivalent, power brushless motor pre-driver.
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* Direct PWM drive output Speed discriminator + PLL speed control circuit FG and integrating amplifiers Forward/reverse switching .
can handle a wider range of speed variations than would be possible if a fixed number of counts was used by changing the.
1. Speed Control Circuit This IC implements speed control using the combination of a speed discriminator circuit and a PLL circuit. The speed discriminator and the PLL circuit output (using a charge pump technique) an error signal once every two FG p.
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