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Product Detailed Parameters
- Description：IC MTR DRV BIPOLAR 3-5.5V 16SOIC
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR)
- Motor Type - Stepper：Bipolar
- Motor Type - AC, DC：Brushed DC
- Function：Driver - Fully Integrated, Control and Power Stage
- Output Configuration：Half Bridge (2)
- Interface：Parallel
- Technology：Bipolar
- Step Resolution：-
- Applications：General Purpose
- Current - Output：1.3A
- Voltage - Supply：3V ~ 5.5V
- Voltage - Load：3V ~ 50V
- Operating Temperature：-20°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-PowerSOIC (0.295", 7.50mm Width)
- Supplier Device Package：16-SOIC
- Grade：-
- Qualification：-
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Overview
The A3953SLBTR is a full-bridge PWM motor driver manufactured by Allegro Microsystems, designed for bipolar brushed DC and stepper motors. It integrates control logic and power stages in a 16-pin PowerSOIC package. The device supports a logic supply voltage range of 3 V to 5.5 V and handles load voltages up to 50 V. It provides a continuous output current of ±1.3 A. Key electrical parameters include an operating temperature range from -20°C to 150°C (TJ) and a typical quiescent current of 3.5 mA.
Feature Summary
- Integrates internal PWM current control with selectable fast and slow decay modes for precise motor regulation.
- Includes saturated sink drivers for efficient operation below 1 A output current.
- Features comprehensive protection mechanisms including thermal shutdown, crossover-current protection, and UVLO.
- Supports low-power sleep mode for reduced current consumption during idle periods.
Applications
- Brushed DC motor control systems
- Bipolar stepper motor drives
- General-purpose motor driver circuits
Procurement Notes
Verify the specific suffix against official datasheets to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status as legacy variants may differ. Ensure the source document explicitly identifies the manufacturer as Allegro MicroSystems to avoid confusion with obsolete or third-party listings.
Selection Notes
Select this component for applications requiring integrated full-bridge driving with internal current regulation. It is suitable for designs needing high junction temperature tolerance and low standby power. Verify that the required load voltage does not exceed the 50 V rating and that the peak current demands remain within the ±1.3 A continuous limit.
Part Context
This part belongs to the A3953 series of full-bridge PWM motor drivers from Allegro MicroSystems. It is functionally similar to the A3951 and A3952 but offers specific current and voltage ratings tailored for general-purpose motor control. The series is known for combining logic and power stages in a compact surface-mount package.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Legacy versions such as the A3953SB-T (DIP) or A3953SLB (tube) exist but may have different packaging or RoHS statuses. Cross-reference with official Allegro documentation for direct pin-compatible alternatives.
