Mfr Part #:

A3959SLBTR-T

Q: Is the A3959SLBTR-T lead free?

Yes, it is lead free with 100% matte tin leadframes.

The Allegro Microsystems A3959SLBTR-T is a DMOS Full-Bridge PWM Motor Driver designed for DC motor control. It offers output currents up to ±3A and operating voltages up to 50V.

✓ Total Stock: 12,097 pcs

$ Price Range: $2.25

A3959SLBTR-T Available from 3 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Xingangxin ✓ Non-Authorised Inventory information	7,953 pcs On Request	7953 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Seba Components ✓ Non-Authorised Inventory information	4,000 pcs On Request	4000 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Smaxon Electronics ✓ Non-Authorised Inventory information	144 pcs On Request	144 pcs	On Request	1	On Request	On Request	1538+	On Request	On Request

A3959SLBTR-T Description

Short technical summary and product information.

The A3959SLBTR-T from Allegro Microsystems is a DMOS Full-Bridge PWM Motor Driver capable of controlling DC motors with pulse width modulated (PWM) current control. It supports output currents up to ±3 A and operating voltages up to 50 V.

This driver features internal fixed off-time PWM current-control timing circuitry that can be adjusted for slow, fast, and mixed current-decay modes. It includes PHASE and ENABLE input terminals for controlling motor speed and direction via external PWM signals. Internal synchronous rectification is incorporated to reduce power dissipation during PWM operation.

Protection features include thermal shutdown with hysteresis, undervoltage monitoring for supply and charge pump, and crossover-current protection. The A3959 is available in a 24-lead SOIC package with internally fused pins. The power pins and tabs are at ground potential and do not require electrical isolation. Each package is lead (Pb) free, with 100% matte tin leadframes.

Key electrical specifications include a typical output resistance of 270 mΩ, operating temperature range of -20°C to 150°C (TJ), and a load supply voltage rating of up to 50V.

A3959SLBTR-T Quick Information

Product Type: Motor Driver

Series: A3959

Canonical Name: A3959SLBTR-T DMOS Full-Bridge PWM Motor Driver

Subcategory: Full-Bridge PWM Motor Driver

A3959SLBTR-T Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

Lead Free: Lead (Pb) free, with 100% matte tin leadframes

A3959SLBTR-T Estimated Pricing

Qty	Low	High
1+	$2.25	$2.25

Estimated market price range - modelled values for guidance only, not live distributor offers.

A3959SLBTR-T Features

±3 A, 50 V Output Rating
Low rDS(on) Outputs (270 mΩ, Typical)
Mixed, Fast, and Slow Current-Decay Modes
Synchronous Rectification for Low Power Dissipation
Internal UVLO and Thermal-Shutdown Circuitry

A3959SLBTR-T Applications

PWM current control for brushed DC motors.
Bidirectional motor speed and direction control.
Reduced power dissipation via synchronous rectification.
Selectable current decay modes for motor tuning.
Internal protection for fault-tolerant operation.

A3959SLBTR-T FAQs

7 frequently asked questions generated from this part’s specifications.

What is the operating voltage range of the A3959SLBTR-T?

9.5V to 50V.

What package is the A3959SLBTR-T available in?

24-SOIC (0.295", 7.50mm Width).

What is the operating temperature range?

-20°C to 150°C (junction).

What is the maximum output current?

3A continuous, 6A peak (<3µs).

What current decay modes does it support?

Mixed, Fast, and Slow.

Is the A3959SLBTR-T lead free?