ml4423 Microsemi Corporation, ml4423 Datasheet
ml4423
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ml4423 Summary of contents
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... Variable Speed AC Motor Controller GENERAL DESCRIPTION The ML4423 provides the PWM sinewave drive signals necessary for controlling three phase AC induction motors as well as single and two phase split capacitor AC induction motors. A constant voltage/frequency ratio can be maintained over a frequency range of greater than 10:1, providing 15Hz to 150Hz control ...
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... ML4423 PIN CONFIGURATION 2 ML4423 28-Pin Narrow PDIP (P28N) 28-Pin SOIC (S28) SENSE GM2 SENSE GM1 SENSE MIN 4 25 5V/12V SELECT HA V SPEED SPEED HB V REF REF ...
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... SELECT GM1 28 C GM2 . SPEED ML4423 FUNCTION An external capacitor to ground sets the PWM triangle frequency in conjunction with the external resistor R . REF A logic low input causes all output drive transistors to turn OFF. An internal pull-up drives COAST left unconnected. ...
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... ML4423 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 .............................................................................................. Output Drive Current ........................................... 50mA Logic Inputs (F/R, COAST) .............................. –0 Junction Temperature .............................................. 150ºC Storage Temperature Range ...................... – ...
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... These sinewaves can be varied in amplitude and frequency by the speed input. Signals across the motor windings are fed back and the ML4423 drives the external power output stage with the PWM sinewave signal necessary to cause the measured (feedback) output waveform to match the internal reference sinewaves ...
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... V 6 OUTPUT DRIVE should LIMIT The 6 output drivers of the ML4423 drive the H and L outputs from volts (with pin 25 tied to V The outputs will drive about 10mA and are designed to drive output buffers and high side drivers requiring 12V (4) swings. The ML4423 provides lower current drive for high/low side drivers requiring 5V input signal swings with pin 25 left unconnected ...
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... Note: Use Extreme caution with high voltage AC motor control and drive circuitry. When the motor is spinning at the desired speed, and the speed is rapidly reduced, the energy stored in the rotation will generate a voltage greater than the +V and destruction of the power transistors, high side driver, ML4423 controller and the power supply may occur. 220pF ...
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... ML4423 Figure 4. ML4423 Output Stage Using IR2118 High Side Drivers 8 ...
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... BSC (1.14 - 1.40) (2.54 BSC) SEATING PLANE 0.015 - 0.021 (0.38 - 0.53) Package: S28 28-Pin SOIC 0.291 - 0.301 0.398 - 0.412 (7.39 - 7.65) (10.11 - 10.47) 0.095 - 0.107 (2.41 - 2.72) 0.012 - 0.020 0.005 - 0.013 (0.30 - 0.51) SEATING PLANE (0.13 - 0.33) ML4423 0.280 - 0.296 0.299 - 0.325 (7.11 - 7.52) (7.60 - 8.26) 0.020 MIN (0.51 MIN) 0.008 - 0.012 0º - 15º (0.20 - 0.31) 0º - 8º 0.022 - 0.042 0.009 - 0.013 (0.56 - 1.07) (0.22 - 0.33) 9 ...
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... ML4423CP (End Of Life) ML4423CS (End Of Life) ML4423IP (End Of Life) ML4423IS (End Of Life) © Micro Linear 2000 registered trademark of Micro Linear Corporation. All other trademarks are the property of their respective owners. Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116; ...