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LB11867FV bảng dữ liệu(PDF) 5 Page - Sanyo Semicon Device |
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LB11867FV bảng dữ liệu(HTML) 5 Page - Sanyo Semicon Device |
5 / 9 page LB11867FV No.A0195-5/9 Application Circuit Example (12V) *1. Power −GND wiring SGND is connected to the control circuit power supply system. *2. Power stabilization capacitor For the power stabilization capacitor on the signal side, use the capacitance of 1μF or more. Connect VCC and GND with a thick and shortest pattern. *3. Power stabilization capacitor on the power side For the power stabilization capacitor on the power side, use the capacitance of 1μF or more. Connect the power supply on the power side and GND with a thick and shortest pattern. *4. IN+, IN- pins Hall signal input pin. Wiring should be short to prevent carrying of noise. If noise is carried, insert the capacitor between IN+ and IN- pins. The Hall input circuit functions as a comparator with hysteresis (15mV). This also has a soft switch section with ±30mV (input signal differential voltage). It is also recommended that the Hall input level is minimum 100mV(p-p). *5. CPWM pin Pin to connect the capacitor for generation of the PWM basic frequency The use of CP = 220pF causes oscillation at f = 30kHz, which is the basic frequency of PWM. As this is used also for the current limiting canceling signal, be sure to connect the capacitor even when the speed control is not made. RF Rp=1k Ω 4 3 2 1 *3 *2 VCC 5VREG FG IN- IN+ H S-S RMI *4 *11 *6 VTH PWM-IN CPWM CT CP=220pF 30kHz *7 *5 *10 CT=0.47 μF SGND *9 SENSE *8 2 1 4 3 *1 1 μF to /25V 1 μF to /25V RFG=10k to 100k Ω 100 Ω |
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