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A3998 Datasheet(PDF) 4 Page - Allegro MicroSystems |
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A3998 Datasheet(HTML) 4 Page - Allegro MicroSystems |
4 / 20 page Dual DMOS Full Bridge Motor Driver With Serial Port Control and Dual Regulators A3998 4 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com ELECTRICAL CHARACTERISTICS1,2 Valid at TJ = 25°C, VBB = 50 V; unless otherwise specified Characteristics Symbol Test Conditions Min. Typ.3 Max. Unit Load Supply Voltage Range VBB Operating 9 – 50 V Bridge Output On-Resistance RDS(on)RG Source driver, IOUT = –1.5 A – 0.5 – Ω Sink driver, IOUT = 1.5 A – 0.5 – Ω VBB Pins Supply Current IBB VREG regulated, IOUT = 0 mA, outputs on, PWM = 50 kHz, Duty Cycle = 50% – 5 10 mA IBBS Standby mode, regulator active – – 5 mA VIN Pin Supply Current IIN – 5 8 mA Control Logic Logic Inputs Voltage Range VIO Operating 3 – 5.5 V Logic Input Voltage VIO(1) VDD× 0.55 – – V VIO(0) – – VDD×0.27 V Logic Pins Input Current (Except ENB1,ENB2, FRST pins) IIO VIN = 0 to 5 V –20 <1.0 20 μA ENB1,ENB2, FRST Pins Input Current IIO(1) VIN = 3.3 V – 66 100 μA IIO(0) VIN = 0.8 V – 16 40 μA Input Hysteresis VIOHYS 200 – 700 mV Propagation Delay Time tpd PWM change to source on 350 550 1000 ns PWM change to source off 35 – 250 ns PWM change to sink on 350 550 1000 ns PWM change to sink off 35 – 250 ns Crossover Delay tCOD 300 425 1000 ns Supply Monitor Reset Timer tPOR 70 100 130 ms RSTN and PMON Pins Output Voltage VRST IOUT = 1 mA – – 0.5 V RSTN and PMON Pins Output Leakage Current Ileakage VOUT = 5 V – – 1 μA Power Monitor Threshold VPM(th) PMON pin, VBB falling 12 13 14 V Power Monitor Hysteresis VPMHYS – 2 – V Protection Circuits VIN Pin UVLO Threshold VINUV(th) VIN rising – 2.8 3 V VIN Pin UVLO Hysteresis VINUVHYS – 100 – mV VBB Pins UVLO Threshold VBBUV(th) VBB rising 6.6 7.1 7.6 V VBB Pins UVLO Hysteresis VBBUVHYS 0.7 0.9 1.1 V FB1 Pin UVLO Threshold VFBUV(th) VFB falling 698 735 772 mV FB1 Pin UVLO Hysteresis VFBUVHYS – 100 – mV Thermal Shutdown Temperature TJSD 155 165 175 °C Thermal Shutdown Hysteresis TJSDHYS – 20 – °C Continued on the next page… |
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