Electronic Components Datasheet Search |
|
LS7560N Datasheet(PDF) 5 Page - LSI Computer Systems |
|
LS7560N Datasheet(HTML) 5 Page - LSI Computer Systems |
5 / 8 page FIGURE 5. In this configuration, the PWM output duty cycle to the motor drivers is directly pro- portional to the DC voltage applied to Pin 6, since Pins 7 and 8 are tied together. FIGURE 3. The closed loop motor control operation is achieved by ap- plying the Tachometer Output at Pin 5 into the negative terminal of the Error Amplifier (Pin 7) through an R1-C1-R2 integrating network. The R1-C1 network is configured as a feedback circuit around the amplifier. Since the Tachometer Output has a fixed positive pulse width, the average value of the pulse train is directly proportional to the motor speed. The desired speed is selected by applying a voltage at the pos- itive input (Pin 6) of the Error Amplifier. The resultant output voltage of the Error Amplifier is applied to an internal Compar- ator along with a ramp waveform generated by the RC Network at Pin 9. The PWM signal at the Comparator output is used to drive outputs 1 thru 6 and com- plete the closed loop. For this configuration, Pin 20, the Top Driver Polarity Select must be tied to Ground. FIGURE 4. This three phase half wave motor controller has no top power tran- sistor to disconnect the windings from the power supply when the BRAKE is ap- plied. Instead, a switching transistor is used which will permit braking for a time determined by the RC time constant. When the capacitor discharges past the ENABLE input switching point, the outputs will be turned off. ** Switch used to connect the error amplifier out and (-) input together when Brake Select input is low and Brake is applied. The speed setting selected by R3 also sets the PWM rate during braking. OUT6 OUT5 OUT4 12 13 14 10 11 V M ENABLE BRAKE 23 2 R C V R FIGURE 4. THREE-PHASE HALF-WAVE MOTOR CONTROLLER 19 (+) (-) OVERCURRENT SENSE V R 7 8 6 19 9 V R OSC ERROR AMP(-) ERROR AMP OUT ERROR AMP(+) RT C T FIGURE 5. OPEN LOOP CONTROLLER 7560N-030906-5 24 25 26 27 21 20 22 15 16 17 14 13 12 10 11 5 7 8 6 9 4 3 28 18 19 2 1 23 ROTOR OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 S1 S2 S3 F/R PWM CNTRL TOP DRV POL SEL BRAKE SEL BRAKE OVERCURRENT SENSE SEQ SEL TACH OUT ENABLE ERROR AMP OSC RC V R V SS V DD FAULT V M V M FIGURE 3. THREE PHASE CLOSED LOOP FULL WAVE MOTOR CONTROLLER CS V R CT R T 10k R2 100k C1 0.1µF * * * R1 TYPICAL VALUES * 1M * V R S1 S2 S3 (-) OUT (+) S1 S2 S3 RS (+) (-) R3 * * RF |
Similar Part No. - LS7560N |
|
Similar Description - LS7560N |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |