ML4425CS Fairchild Semiconductor, ML4425CS Datasheet
ML4425CS
Specifications of ML4425CS
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ML4425CS Summary of contents
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ML4425 Sensorless BLDC Motor Controller Features Block Diagram 750nA – 1. BACK FB C EMF 24 SAMPLER + – 8 3.9V SPEED SET 5 – SPEED COMP + ...
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ML4425 Pin Configuration Pin Description Pin Name 1 I Motor current sense input. When I SENSE LB, and LC are shut off for a fixed time determined Active low output driver for the phase A high-side ...
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PRODUCT SPECIFICATION Pin Description (continued) Pin Name resistor to GND sets up a current proportional to the input voltage of the VCO. VCO capacitor to GND sets the time that the controller stays in ...
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ML4425 Electrical Characteristics Symbol Parameter Reference V Total Variation REF PWM Oscillator Total Variation Ramp Peak Ramp Valley Ramp Charging Current Speed Control Loop SPEED SET Input Voltage Range SPEED FB Input Voltage Range SPEED COMP Output Current SPEED SET ...
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PRODUCT SPECIFICATION Electrical Characteristics Symbol Parameter Logic Outputs (VCO/TACH, UV FAULT) (Note 3) VCO/TACH Output High Voltage I VCO/TACH Output Low Voltage I UV FAULT Output High Voltage UV FAULT Output Low Voltage Back-EMF Sampler SPEED FB Align Mode Voltage ...
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ML4425 Functional Description General Component Selection 6 PRODUCT SPECIFICATION Power Supply and Reference Output Drivers V MOTOR 12V DC SUPPLY CAPACITOR HA HB MOTOR MOTOR PHASE B PHASE SENSE Figure 1. Using 3-Phase ...
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PRODUCT SPECIFICATION Current Limiting in the Power Stage I LIMIT R SENSE I Filter SENSE FROM R SENSE I SENSE 5 V REF V REF 16k I LIMIT 2.9V 8k Figure 2. Current Sense Circuitry REV. 1.0.2 7/2/01 C IOS ...
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ML4425 State LA R OFF A OFF B OFF OFF F OFF HIGH SIDE HB DRIVE OUTPUTS HC LA LOW SIDE LB DRIVE OUTPUTS LC Figure 4. Output Commutation Sequence Timing Diagram ...
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PRODUCT SPECIFICATION f 0.05 N RPM MAX Back EMF Sampler RES1 670 V V MOTOR PH1 PH2 Neutral RES1 MOTOR RES2 MOTOR RES3 MOTOR F/R F/R Figure 6. ...
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ML4425 Back EMF Sensing PLL Commutation Control 0.25 SPEEDFB1 SPEEDFB 100 SPEEDFB2 SPEEDFB1 Start-Up Sequence Align Mode (RESET 7 ...
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PRODUCT SPECIFICATION 750nA – BACK EMF FB C SAMPLER TO RESET INPUT OF COMMUTATION STATE MACHINE Figure 8. ML4425 Start-up Circuitry for Controlling the Align and Ramp Times Run Mode ...
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ML4425 Cross Conduction Comparator Braking Undervoltage Lockout Design Considerations Interfacing to a 3-Phase Bridge Power Stage 12 PRODUCT SPECIFICATION FROM COMMUTATION STATE MACHINE FROM SPEED CONTROL LOOP & CURRENT LIMIT GATING LOGIC & – OUTPUT + 1.4V DRIVERS 9.5V + ...
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PRODUCT SPECIFICATION V BUSS 24V–80V C2 330 100V 10k 100nF 100V Q4 FQD8P10 Q1 Q2 TN6718A TN6718A 12V IRFR120 R1 470m 2W R12 R13 2k 2k R16 10k C17 C9 1nF 100nF C12 ...
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ML4425 12V IR2118 C16 100nF 25V IN HO COM BUSS 24V–80V C5 R6 330 F 100 400V Q1 FQP4P40 FQP4P40 Q2 FQP5N40 R12 470m 2W R5 10k C4 C3 1nF 100nF C15 100nF ...
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PRODUCT SPECIFICATION Mechanical Dimensions 28 PIN 0.180 MAX (4.57 MAX) 0.125 - 0.135 (3.18 - 3.43) 0.699 - 0.713 (17.75 - 18.11) 28 PIN 0.024 - 0.034 0.050 BSC (0.61 - 0.86) (1.27 BSC) ...
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... ML4425 Ordering Information Part Number ML4425CP ML4425CS ML4425IP ML4425IS DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; ...