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LB11660FV-TLM-H Datasheet(PDF) 7 Page - ON Semiconductor |
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LB11660FV-TLM-H Datasheet(HTML) 7 Page - ON Semiconductor |
7 / 10 page LB11660FV www.onsemi.com 7 *5.Hall sensor input Lines that are as short as possible must be used to prevent noise from entering the system. The Hall sensor input circuit consists of a comparator with hysteresis (20mV). We recommend that the Hall sensor input level be at least three times this hysteresis, i.e. at least 60mVp-p. *6.PWM oscillator frequency setting capacitor The PWM oscillator oscillates at f = 23kHz when CP is 200pF and at f = 46kHz when CP is 100pF, and this frequency becomes the PWM reference frequency. Note that the PWM frequency is given approximately by the following equation. f [kHz] (4.6×106) ÷C [pF] *7.FG output This is an open collector output, and a rotation count detection function can be implemented using this FG output, which corresponds to the phase switching. This pin must be left open if unused. *8.HB pin This pin provides a Hall effect sensor bias constant-voltage output of 1.25V. *9.RMI pin This pin is the speed control minimum speed setting. The minimum output duty is set by R3 and R4. Leave R4 open to have the motor stop when the duty is 0%. Rotation Control Timing Chart Minimum output duty VTH(V) PWM duty(%) Duty 100% Duty 0% VPWML VPWMH RMI CPWM 2.5V 0.5V PWM control variable speed mode Full speed mode 0V On duty Minimum speed setting rotation RMI voltage VTH voltage ON OFF |
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