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LB11873 Datasheet(PDF) 7 Page - Sanyo Semicon Device |
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LB11873 Datasheet(HTML) 7 Page - Sanyo Semicon Device |
7 / 14 page LB11873 No.A0081-7/14 Pin Functions Pin No. Pin Description Equivalent Circuit 2 1 35 OUT1 OUT2 OUT3 Motor drive outputs 33 GND2 Output block ground 28 VM Motor drive output power supply and output current detection Connect a resistor (Rf) between this pin and VCC. The output current will be limited to the value IOUT = VRF/Rf. 8 9 6 7 4 5 IN1+ IN1- IN2+ IN2- IN3+ IN3- Hall sensor inputs "H" is the state where IN+ > IN-, and "L" is the reverse state. It is desirable that the Hall sensor signals have an amplitude greater than 50 mVpp If noise on the Hall sensor signals is a problem, connect capacitors between the IN+ and IN- inputs. 10 HB Hall sensor element bias current This circuit is turned off in stop mode. 11 GND1 Control circuit block ground 12 PWM Sets the PWM oscillator frequency. Connect a capacitor between this pin and ground. A 680pF capacitor sets the oscillator frequency to be about 34kHz. Continued on next page. VREG 300 Ω 4 300 Ω 9 7 5 8 6 VREG 10 VREG 2k Ω 200 Ω 12 1 2 35 300 Ω VM 33 28 VCC |
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