A3950_06 Allegro Micro Systems, Inc., A3950_06 Datasheet
A3950_06
Related parts for A3950_06
A3950_06 Summary of contents
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Features and Benefits ▪ Low R outputs DS(on) ▪ Overcurrent protection ▪ Motor lead short-to-supply protection ▪ Short-to-ground protection ▪ Sleep function ▪ Synchronous rectification ▪ Diagnostic output ▪ Internal undervoltage lockout (UVLO) ▪ Crossover-current protection Packages: Package LP, 16 ...
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A3950 Selection Guide Part Number A3950SLP-T 96 pieces / tube A3950SLPTR-T 13 in. reel, 4000 pieces / reel A3950SEU-T 92 pieces / tube A3950SEUTR-T 7 in. reel, 1500 pieces / reel Absolute Maximum Ratings Characteristic Load Supply Voltage Output Current ...
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A3950 VREG 0.22 μ MODE PHASE V DD ENABLE 5 kΩ SLEEP 5 kΩ NFAULT Terminal List Table Name EU NFAULT 15 MODE 16 PHASE 1 GND 2, 12 SLEEP 3 ENABLE 4 OUTA 6 SENSE 7 VBB ...
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A3950 ELECTRICAL CHARACTERISTICS 25°C, V Characteristics Motor Supply Current PHASE, ENABLE, MODE Input Voltage SLEEP Input Voltage PHASE, MODE Input Current 1 ENABLE Input Current SLEEP Input Current NFAULT Output Voltage Input Hysteresis, except SLEEP Output ...
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A3950 SLEEP ENABLE PHASE MODE OUTA OUTB 0 I OUTX OutA 3 A Charge pump and VREG power-on delay (≈200 μs) DMOS Full-Bridge Motor Driver Timing Diagram: PWM Control ...
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A3950 V OUTA High-Z V OUTB I PEAK I OCP I OUTx ENABLE, Source or Sink BLANK Charge Pump Counter NFAULT Motor lead short condition DMOS Full-Bridge Motor Driver Timing Diagram: Overcurrent Control t t BLANK OCP Normal dc motor ...
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A3950 Device Operation. The 3950 is designed to operate one dc motor. The currents in the output full-bridges, all N-channel DMOS, are regulated with fixed off-time pulse width modulated (PWM) control circuitry. Logic Inputs. If logic inputs are pulled up ...
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A3950 Overcurrent Protection. Referring to the figures below, the voltage on the output pins relative to supply are monitored to ensure that the motor lead is not shorted to supply or ground short is detected, the full-bridge outputs ...
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A3950 Power Dissipation. First order approximation of power dissipation in the A3950 can be calculated by first examining the power dissipation in the full-bridge during each of the operation modes. The A3950 features synchronous rectifica- tion, a feature that effectively ...
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A3950 SENSE Pin. A low value resistor can be placed between the SENSE pin and ground for current sensing purposes. To mini- mize ground-trace IR drops in sensing the output current level, the current sensing resistor should have an independent ...
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A3950 All dimensions reference only, not for tooling use. (reference JEDEC MO-220WGGC-4) Dimensions in millimeters U.S. Customary dimensions (in.) in brackets, for reference only Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at ...
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A3950 LP Package, 16 Pin TSSOP with Exposed Thermal Pad 16X 0.10 [.004] C 0.30 .012 16X 0.19 .007 0.10 [.004 0.45 .018 NOM 1.65 .065 NOM 2X0.20 .008 MIN The products described here are manufactured ...