A3953SLB Allegro Microsystems Inc, A3953SLB Datasheet
A3953SLB
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A3953SLB Summary of contents
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This device is in production, however, it has been deemed Pre-End of Life. The product is approaching end of life. Within a minimum of 6 months, the device will enter its final, Last Time Buy, order phase. Date of status ...
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Features and Benefits ▪ ±1.3 A continuous output current ▪ output voltage rating ▪ 5.5 V logic supply voltage ▪ Internal PWM current control ▪ Saturated sink drivers (below 1 A) ▪ Fast and slow ...
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... Characteristic Package Thermal Resistance, Junction to Ambient Package Thermal Resistance, Junction to Tab *Additional thermal information available on Allegro website. BRAKE REF Note the A3953SB (DIP) and the A3953SLB (SOIC) are RC electrically identical and share a common terminal number GROUND assignment. GROUND LOGIC SUPPLY PHASE ...
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A3953 ELECTRICAL CHARACTERISTICS at T (unless otherwise noted.) Characteristic Power Outputs Load Supply Voltage Range Output Leakage Current Sense Current Offset Output Saturation Voltage BRAKE = H (Forward/Reverse Mode) Output Saturation Voltage BRAKE = L (Brake Mode) Clamp Diode Forward ...
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A3953 ELECTRICAL CHARACTERISTICS (continued 5.5 V (unless otherwise noted.) Characteristic AC Timing PWM RC Fixed Off-time PWM Turn-Off Time t PWM Turn-On Time PWM Minimum On Time Propagation Delay Times Crossover Dead Time Maximum PWM Frequency f Full-Bridge ...
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A3953 ELECTRICAL CHARACTERISTICS (continued 5.5 V (unless otherwise noted. ) Characteristic Control Circuitry Thermal Shutdown Temp. Thermal Shutdown Hysteresis UVLO Enable Threshold UVLO Hysteresis Logic Supply Current Motor Supply Current (No Load) Logic Supply Voltage Range Logic Input ...
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A3953 FUNCTIONAL DESCRIPTION Internal PWM Current Control During Forward The A3953 contains a fixed and Reverse Operation. off-time pulse width modulated (PWM) current-control circuit that can be used to limit the load current to a desired value. The peak value ...
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A3953 During braking, when the MODE input is high, the peak current limit can be approximated by: ≈ I TRIP BRAKE MH CAUTION: Because the kinetic energy stored in the motor and load inertia is being converted into current, which ...
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A3953 value of t and the minimum on-time pulse t OFF occurs each time the PWM latch is reset. If the motor is not rotating (as in the case of a stepper motor in hold/detent mode, a brush dc motor ...
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A3953 Thermal protection circuitry turns off all drivers should the junction temperature reach 165°C (typical). This is intended only to protect the device from failures due to excessive junction temperatures and should not imply that output short circuits are permitted. ...
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A3953 the need to generate a variable analog voltage reference. In this case voltage on the REF input is used typically to limit the maximum load current servo applications, which require accurate positioning at low or ...
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A3953 1.27 MIN +0.25 1.52 –0.38 0.46 ±0.12 10.30±0. 16X 0.10 C 0.41 ±0.10 1.27 Copyright ©1995-2008, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from time to time, ...