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Product Detailed Parameters
- Description：IC PWR DRIVER BIPOLAR 1:1 16SOIC
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR)
- 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 ~ 125°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 A2557KLBTR-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 and supports load voltages up to 60V. The device operates on a 4.75V to 5.25V supply voltage and utilizes a non-inverting open/switch interface. It is housed in a 16-PowerSOIC package (0.295" width) and includes fixed current limiting and overtemperature fault protection. The component is RoHS compliant and rated for an operating temperature range of -40°C to 85°C.
Feature Summary
- Integrated fixed current limiting and overtemperature protection for robust load management
- Bipolar output configuration suitable for controlling relay and solenoid loads
- Non-inverting input interface simplifies control logic integration
Applications
- Relay driver circuits
- Solenoid actuation systems
- Industrial load switching applications
Procurement Notes
Verify the specific suffix 'KLBTR-T' against official Allegro documentation to confirm package type and compliance status, as variations exist within the A2557 family. Confirm end-of-life or obsolescence status directly with the manufacturer or authorized distributors prior to design finalization, as availability may be restricted.
Selection Notes
Select this component when a low-side bipolar driver with integrated thermal and current protection is required for 60V loads. Ensure the application environment remains within the specified -40°C to 85°C operating temperature range. Verify that the 300mA per-channel current rating meets the peak requirements of the connected relays or solenoids without exceeding thermal limits.
Part Context
The A2557 series comprises high-current power drivers intended for automotive and industrial applications. The A2557KLBTR-T variant specifically denotes the tape-and-reel packaging format within the 16-PowerSOIC footprint. This part belongs to Allegro's portfolio of discrete power management solutions focused on reliable switching of inductive loads.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided source data. Consult Allegro MicroSystems technical support for direct replacements or pin-compatible alternatives.
