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A4957SESTR-T The Allegro Microsystems A4957SESTR-T is a full-bridge MOSFET driver designed for high-power inductive loads like brush DC motors. It features an integrated charge pump and diagnostics.
Mfr Part #:

A4957SESTR-T

Available from 2 distributors
Mfr Name: Allegro Microsystems
Allegro Microsystems
The Allegro Microsystems A4957SESTR-T is a full-bridge MOSFET driver designed for high-power inductive loads like brush DC motors. It features an integrated charge pump and diagnostics.
✓ Total Stock: 7,974 pcs
$ Price Range: $2.25

A4957SESTR-T Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
7,494 pcs
On Request
7494 pcs On Request 1 On Request On Request On Request On Request On Request
Bristol Electronics ✓
Non-Authorised Inventory information
480 pcs
On Request
480 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

A4957SESTR-T Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Applications
Function
Interface
Motor Type
Mounting Type
Operating Temperature
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A4957SESTR-T Description

Short technical summary and product information.

The A4957SESTR-T from Allegro Microsystems is a full-bridge controller designed to drive external N-channel power MOSFETs, making it suitable for applications with high-power inductive loads such as brush DC motors.

 

This driver IC supports a wide supply voltage range of 4.5 V to 50 V. It incorporates a unique charge pump regulator that provides full gate drive even at battery voltages as low as 7 V, and can operate with reduced gate drive down to 4.5 V. A bootstrap capacitor is utilized for the high-side gate drive, with a charge management system ensuring it remains sufficiently charged.

 

Key features include independent control of each MOSFET, cross-conduction protection with adjustable dead time, and integrated diagnostics for undervoltage and overtemperature faults. The device also offers a low current sleep mode. It is supplied in a 24-contact, 4 mm x 4 mm QFN package with an exposed pad for enhanced thermal dissipation.

 

The A4957SESTR-T is surface-mountable and designed for general-purpose applications. Its robust design and integrated features make it a versatile solution for motor control systems.

A4957SESTR-T Quick Information

Product Type: Motor Driver IC
Canonical Name: A4957SESTR-T Full-Bridge MOSFET Driver
Subcategory: Full-Bridge Driver

A4957SESTR-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 leadframe plating

A4957SESTR-T Estimated Pricing

Qty Low High
1+ $2.25 $2.25

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

A4957SESTR-T Features

  • Full-bridge controller for external N-channel MOSFETs.
  • Operates from 4.5 V to 50 V supply voltage.
  • Integrated charge pump for low voltage operation.
  • Adjustable dead-time for cross-conduction protection.
  • 24-QFN package with exposed thermal pad.

A4957SESTR-T Applications

  • Ideal for brush DC motor control.
  • Suitable for high-power inductive loads.
  • Used in general-purpose motor applications.
  • Designed for automotive applications.

A4957SESTR-T FAQs

4 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the A4957SESTR-T?

The A4957SESTR-T operates from a supply voltage range of 4.5 V to 50 V.

What type of motor does the A4957SESTR-T drive?

The A4957SESTR-T is designed for brushed DC motors.

What is the package type for the A4957SESTR-T?

The A4957SESTR-T is supplied in a 24-QFN package with an exposed pad.

What is the operating temperature range of the A4957SESTR-T?

The operating temperature range for the A4957SESTR-T is -20°C to 85°C.

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