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Product Detailed Parameters
- Description：IC PWR DRIVER BIPOLAR 1:1 16SOIC
- Series：-
- Mfr：Allegro MicroSystems
- Package：Bulk
- Switch Type：Relay, Solenoid Driver
- Number of Outputs：4
- Ratio - Input:Output：1:01
- Output Configuration：Low Side
- Output Type：Bipolar
- Interface：On/Off
- Voltage - Load：60V (Max)
- Voltage - Supply (Vcc/Vdd)：4.75V ~ 5.25V
- Current - Output (Max)：300mA
- Rds On (Typ)：-
- Input Type：Non-Inverting
- Features：Status Flag
- Fault Protection：Current Limiting (Fixed), Over Temperature
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：16-SOIC
- Package / Case：16-PowerSOIC (0.295", 7.50mm Width)
- Grade：-
- Qualification：-
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Overview
The A2557ELB-T is a bipolar power driver IC manufactured by Allegro MicroSystems, designed for driving relays and solenoids. It features four low-side outputs with a maximum output current of 300mA per channel. The device operates on a supply voltage (Vcc/Vdd) ranging from 4.75V to 5.25V and supports load voltages up to 60V. It utilizes a non-inverting open/switch interface and provides status flag outputs. Integrated fault protection includes fixed current limiting and overtemperature shutdown. The component is housed in a 16-PowerSOIC package and functions within an operating temperature range of -40°C to 85°C.
Feature Summary
- Integrated fault protection mechanisms including fixed current limiting and overtemperature shutdown
- Status flag output capability for monitoring operational state
- Low-side bipolar output configuration suitable for relay and solenoid loads
Applications
- Relay drivers
- Solenoid drivers
Procurement Notes
Verify the exact suffix designation, as the provided model uses 'T' while official records often list 'TR-T'. Confirm RoHS3 compliance and MSL level 1 status. Check for obsolescence notices, as similar variants are marked discontinued. Ensure the packaging type matches requirements, as tape-and-reel specifications may vary by revision.
Selection Notes
Select this component for applications requiring low-side switching of inductive loads like relays. Ensure the system supply voltage remains within the 4.75V to 5.25V range. Verify that the load voltage does not exceed 60V. Consider the 16-PowerSOIC package constraints for thermal management and PCB layout. Confirm compatibility with non-inverting control signals.
Part Context
This part belongs to the A2557 family of power drivers from Allegro MicroSystems. It is categorized under PMIC distribution switches and load drivers. The manufacturer specializes in magnetic sensors and power ICs for automotive and industrial markets. This specific variant is a surface-mount device intended for automated assembly processes.
Replacement Considerations
Check for direct substitutes within the A2557 series. Verify pinout and electrical parameter compatibility before substitution. Note that some distributors list related part numbers with different suffixes.
