IR21771SPBF International Rectifier, IR21771SPBF Datasheet
IR21771SPBF
Specifications of IR21771SPBF
Related parts for IR21771SPBF
IR21771SPBF Summary of contents
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Phase Current Sensor IC for AC motor control Features • Floating channel up to 600V for IR21771 and 1200V for IR22771 • Synchronous sampling measurement system • High PWM noise (ripple) rejection capability • Digital PWM output • Fast Over ...
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Absolute Maximum Ratings Absolute Maximum Ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to V Dissipation ratings are measured under board mounted and still air conditions. Symbol V High ...
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Static Electrical Characteristics 15V unless otherwise specified. Temp=27° Pin Symbol Definition I Quiescent V supply current QBS BS I Quiescent V supply ...
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Pin: PO Symbol Definition Input offset voltage measured by PWM V POs output ∆V / POs Input offset voltage temperature drift ∆Tj ∆offset between samples on channel1 ∆V and channel2 measured at PO (See Pos Note1) G PWM Output Gain ...
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AC Electrical Characteristics 15V unless otherwise specified. Temp=27°C. BIAS CC BS Symbol Definition f PWM frequency sync f Throughput out BW Bandwidth (@ -3 dB) GD Group Delay (input filter) D Minimum Duty ...
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V max min SYNC PO V max min SYNC 20% Figure 6: ∆offset between two consecutive samples measured IR22771S/IR21771S(PbF) SR (PO full response time) Figure 5: PO ...
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Lead Assignments Lead Definitions Pin Symbol 1 V Low side voltage supply CC No connection Low side ground supply connection connection 6 OC Over current signal (open drain) 7 ...
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Timing and logic state diagrams description ** See OC and PO detailed descriptions below in this document Functional block diagram 8 IR22771S/IR21771S(PbF) www.irf.com ...
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DEVICE DESCRIPTION 1.1 SYNC input Sync input clocks the whole device. In order to make the device work properly it must be synchronous with the triangular PWM carrier as shown in Figure 8. SYNC pin is internally pulled-down (10 ...
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Cycle 1 Triangular SYNC ( off_cycle1 T cycle1 off _ cycle cycle 1 High voltage V IN+ V IN- 10 IR22771S/IR21771S(PbF) Cycle 2 T off_cycle2 T T cycle2 off_cycle3 ...
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DC transfer functions The working principle of the device can be easily explained by Figure 10, in which the main signals are represented. Triangular reference SYNC Vin PO Figure 10: Main current sensor signals and outputs PWM out (PO ...
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Figure 14: Input filter transfer function (10 kHz PWM) The second stage samples the result of the first stage at double Sync frequency. This action can be used to fully remove the odd harmonics from the input signal. To perform ...
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For this particular PWM scheme another suitable solution is driving the IR2x771 with a half frequency SYNC signal (f =f /2). SYNC PWM In this case the cut frequency of the input filter is Figure 15: Even harmonic cancellation principle ...
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Sizing tips 2.1 Bootstrap supply The V voltage provides the supply to the high BS1,2,3 side drivers circuitry of the IR22771S/IR21771S. V supply sit on top of the must be floating. The bootstrap method to generate ...
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Bootstrap Capacitor For high T designs where is used an electrolytic HON tank capacitor, its ESR must be considered. This parasitic resistance develops a voltage divider with R generating a voltage step on V boot charge of bootstrap capacitor. ...
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Case Outline WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 16 IR22771S/IR21771S(PbF) This part has been qualified for the Industrial Market Data and specifications subject to change without notice. 8/17/2005 www.irf.com ...