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ML4411ACS Datasheet(PDF) 2 Page - Micro Linear Corporation |
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ML4411ACS Datasheet(HTML) 2 Page - Micro Linear Corporation |
2 / 14 page 2 ML4411/ML4411A PIN CONFIGURATION 1 GND Signal and Power Ground 2 P1 Drives the external P-channel transistor driving motor PH1 3 P2 Drives the external P-channel transistor driving motor PH2 4VCC2 12V power and power for the braking function 5 P3 Drives the external P-channel transistor driving motor PH3 6COTA Compensation capacitor for linear motor current amplifier loop 7CBRK Capacitor which stores energy to charge N-channel MOSFETs for braking with power off. 8 DIS PWR A logic 0 on this pin turns off the N and P outputs and causes the TACH comparator output to appear on TACH OUT 9-11 N1, N2 N3 Drives the external N-channel MOSFETs for PH1, PH2, PH3 12 ISENSE Motor current sense input 13 COS Timing capacitor for fixed off-time PWM current control 14 CVCO Timing capacitor for VCO 15 VCO/TACH Logic Output from VCO or TACH OUT comparator 16 RESET Input which holds VCO off and sets the IC to the RESET condition 17 PWR FAIL A “0” output indicates 5V or 12V is under-voltage. This is an open collector output with a 4.5ký pull-up to +5V 18 ENABLE E/A A ”1” logic input enables the error amplifier and closes the back-EMF feedback loop 19 +5V 5V power supply input 20 RC VCO loop filter components 21 IRAMP Current into this pin sets the initial acceleration rate of the VCO during start-up 22 PH1 Motor Terminal 1 23 PH2 Motor Terminal 2 24 PH3 Motor Terminal 3 25 VCC 12V power supply. Terminal which is sensed for power fail 26 BRAKE A ”0” activates the braking circuit 27 ILIMIT Sets the threshold for the PWM comparator 28 ICMD Current Command for Linear Current amplifier PIN NAME FUNCTION PIN NAME FUNCTION PIN DESCRIPTION ML4411 28-Pin SOIC (S28W) GND P1 P2 VCC2 P3 COTA CBRK DIS PWR N1 N2 N3 ISENSE COS CVCO ICMD ILIMIT BRAKE VCC PH3 PH2 PH1 IRAMP RC +5V ENABLE E/A PWR FAIL RESET VCO/TACH OUT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 TOP VIEW |
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