A2557ELB Datasheet PDF - Allegro MicroSystems

The A2557xB, A2557xEB, and A2557xLB have been specifically designed to provide cost-effective solutions to relay-driving applications with up to 300 mA drive current per channel. They may also be used for driving incandescent lamps in applications where turn-on time is not a concern. Each of the four outputs will sink 300 mA in the on state. The outputs have a minimum breakdown voltage of 60 V and a sustaining voltage of 40 V. A low-power Sleep Mode is activated with either ENABLE low or all inputs low. In this mode, the supply current drops to below 100 µA.

FEATURES
■ 300 mA Output Current per Channel
■ Independent Over-Current Protection &Thermal Limiting for Each Driver
■ Output Voltage to 60 V
■ Output SOA Protection
■ Fault-Detection Circuitry for Open or Shorted Load
■ Low Quiescent Current Sleep Mode
■ Integral Output Flyback/Clamp Diodes
■ TTL- and 5 V CMOS-Compatible Inputs