ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC PWR DRIVER BIPOLAR 1:1 28PLCC
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tube
- 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：28-PLCC (11.51x11.51)
- Package / Case：28-LCC (J-Lead)
- Grade：-
- Qualification：-
Download product information
Overview
The A2557KEB 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 within a supply voltage range of 4.75V to 5.25V and supports load voltages up to 60V. It utilizes a 28-PLCC surface-mount package measuring 11.51x11.51mm. The component includes fixed current limiting and overtemperature fault protection mechanisms.
Feature Summary
- Provides four independent low-side bipolar outputs for relay and solenoid control
- Integrates fixed current limiting and overtemperature protection for circuit safety
- Features status flag reporting for diagnostic monitoring
Applications
- Relay driver circuits
- Solenoid actuation systems
Procurement Notes
Verify component authenticity through authorized channels as the part is marked as obsolete. Confirm RoHS compliance status, which is listed as non-compliant in available records. Ensure the 28-PLCC package dimensions match the target PCB footprint. Check for specific manufacturing date codes if long-term reliability is critical for the application design.
Selection Notes
Select this component when a bipolar driver with integrated protection is required for low-side switching applications. The 300mA output capability suits moderate-load relays. Consider the 28-PLCC package constraints during layout. Verify that the 4.75V to 5.25V supply range aligns with the system power architecture before integration.
Part Context
This device belongs to the A2557 series of power drivers from Allegro MicroSystems. It is specifically engineered for industrial and automotive environments requiring robust load switching. The series emphasizes reliability through built-in thermal and current safeguards, making it suitable for demanding electromechanical control tasks.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. As the product status is obsolete, alternative sourcing requires direct consultation with the manufacturer or authorized distributors for potential last-time buy options.
