A3946KLPTR Equivalent & Substitute Parts

Part Overview

The A3946KLPTR is a brushless DC (BLDC) motor driver IC manufactured by Allegro MicroSystems, designed for general-purpose motor control applications. This device functions as a commutation and direction management controller with a pre-driver half-bridge output configuration, operating across a 7V to 60V supply voltage range in a 16-eTSSOP surface mount package with exposed pad.

The A3946KLPTR is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this controller.

Substiute Parts

A3946KLPTR

Allegro MicroSystemsIn Stock: 7047A3946KLPTR Datasheet

Current PartRFQ

A3946KLPTR-T

Allegro MicroSystemsIn Stock: 35555A3946KLPTR-T Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3946KLPTR is determined by strict equivalence across the following critical parameters:

• Motor control function (BLDC commutation and direction management)
• Output configuration (pre-driver half-bridge topology)
• Interface type (parallel control)
• Supply voltage range (7V ~ 60V)
• Operating temperature range (-40°C ~ 135°C)
• Package specification (16-eTSSOP-EP with exposed pad)
• Physical form factor (16-TSSOP surface mount)

The A3946KLPTR-T is a parametric equivalent that maintains identical electrical and mechanical specifications while differing in product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The A3946KLPTR-T is the direct substitute for the obsolete A3946KLPTR. Both parts maintain identical electrical and mechanical specifications, ensuring functional compatibility in existing circuit designs without modification.

Key differentiation factors:

• The A3946KLPTR-T carries Active product status, ensuring ongoing manufacturer support and availability.
• The A3946KLPTR-T is ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and procurement.
• The A3946KLPTR-T has higher inventory availability (35,501 units) compared to the obsolete variant (7,034 units).
• Moisture sensitivity level differs (MSL 2 vs. MSL 1), requiring appropriate storage and handling protocols for the substitute part.

For new designs or replacement applications, the A3946KLPTR-T is the recommended selection based on product status and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can the A3946KLPTR-T be used as a direct replacement for the A3946KLPTR?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, supply voltage range (7V ~ 60V), operating temperature range (-40°C ~ 135°C), output configuration (pre-driver half-bridge), and package specification (16-eTSSOP-EP). No circuit modifications are required.

Q: What is the difference between the A3946KLPTR and A3946KLPTR-T?

A: The primary differences are product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), and moisture sensitivity level (MSL 1 vs. MSL 2). Electrical and mechanical specifications are identical.

Q: Are there any handling differences between these parts?

A: Yes. The A3946KLPTR-T has MSL 2 rating, requiring storage at controlled humidity (≤60% RH) with a 1-year shelf life from the date of manufacture. The A3946KLPTR has MSL 1 (unlimited shelf life). Appropriate moisture control measures should be implemented during storage and assembly of the A3946KLPTR-T.

Q: Does the A3946KLPTR-T support the same BLDC motor control applications?

A: Yes. The A3946KLPTR-T maintains the same commutation and direction management function, parallel interface, and half-bridge pre-driver output configuration, supporting identical general-purpose BLDC motor control applications.

Q: What is the package compatibility between these parts?

A: Both parts use the 16-eTSSOP-EP package with identical physical dimensions (0.173" width, 4.40mm). PCB footprints and assembly processes are fully compatible.