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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ML4425 데이터시트(PDF) 3 Page - Fairchild Semiconductor |
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ML4425 데이터시트(HTML) 3 Page - Fairchild Semiconductor |
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3 / 16 page  PRODUCT SPECIFICATION ML4425 REV. 1.0.2 7/2/01 3 Absolute Maximum Ratings Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Operating Conditions 16 RVCO An resistor to GND sets up a current proportional to the input voltage of the VCO. 17 CAT A capacitor to GND sets the time that the controller stays in the align mode. 18 UV FAULT This output goes low when VDD drops below the UVLO threshold, and indicates that all output drivers have been disabled. 19 CRT A capacitor to GND sets the time that the controller stays in the ramp mode. 20 SPEED FB Output of the back-EMF sampling circuit and input to the VCO. An RC network connected to SPEED FB sets the compensation for the PLL loop formed by the back-EMF sampling circuit, the VCO, and the commutation state machine. 21 CRR A capacitor to between CRR and SPEED FB sets the ramp rate (acceleration) of the motor when the controller is in ramp mode. 22 FB A The motor feedback voltage from phase A is monitored through a resistor divider for back-EMF sensing at this pin. 23 FB B The motor feedback voltage from phase B is monitored through a resistor divider for back-EMF sensing at this pin. 24 FB C The motor feedback voltage from phase C is monitored through a resistor divider for back-EMF sensing at this pin. 25 BRAKE A logic low input activates motor braking by shutting off the high-side output drivers and turning on the low-side output drivers. 26 CIOS A capacitor to GND sets the time that the low-side output drivers remain off after ISENSE exceeds its threshold . 27 RREF An 137k Ω resistor to GND sets a current proportional to VREF that is used to set all the internal bias currents except for the VCO. 28 GND Signal and power ground. Parameter Min. Max. Units VDD 14 V Logic Inputs (SPEED FB, BRAKE) GND – 0.3 7 V All Other Inputs and Outputs GND – 0.3 VDD + 0.3 V Output Current (LA, LB, LC, HA, HB, HC ) ±50 mA Junction Temperature 150 °C Storage Temperature Range -65 150 °C Lead Temperature (Soldering 10 sec.) 260 °C Thermal Resistance ( θJA) 28-Pin Narrow PDIP 28-Pin SOIC 48 75 °C/W °C/W Parameter Min. Max. Units Temperature Range ML4425CX ML4425IX 0 –40 70 85 °C °C VDD 10.8 13.2 V Pin Description (continued) Pin Name Function |
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