Allegro MicroSystems Europe adds 1.0MHz current sensor ICs to portfolio

Two ICs have been added to the Allegro MicroSystem Europe’s family of high bandwidth current sensor ICs. The ACS732 and ACS733 current sensor ICs are compact and measure high-frequency currents in DC/DC converters and other switching power applications.

The ACS732 and ACS733 are the first 1.0MHz offerings from Allegro to offer 3600V RMS galvanic isolation ratings. The current sensor ICs are Hall-effect-based and include user-configurable over-current fault detection.

According to Allegro, these features make them suitable for high-frequency transformer and current transformer replacement in applications running at high voltages.

The ACS732 and ACS733 are suitable for automotive, industrial, commercial, and communications systems. They may be used in motor control, load detection and management, switch-mode power supplies, and over-current fault protection applications. The devices are calibrated at the Allegro factory to provide a high accuracy solution over the entire operating temperature range.

The integrated, wide body SOIC-16 package has a typical resistance of one mOhm, providing low power loss and reduced bill of materials, says Allegro. Applied current flowing through the copper conduction path generates a magnetic field that is sensed by the IC and converted to a proportional voltage. Current is sensed differentially in order to reject external common-mode fields. The current-carrying pins (pins one to eight) are electrically isolated from the sensor leads (pins nine to 16). This allows the devices to be used in high-side current sensing applications without the use of high-side differential amplifiers, isolators, or other costly isolation techniques.

The ACS732 and ACS733 are provided in a small, low profile, surface-mount SOIC-16 wide-body package. This package is lead (Pb) free, with 100 per cent matt-tin leadframe plating (suffix –T). 

Allegro MicroSystems develops, manufactures and markets high-performance semiconductors, serving the automotive market, with additional focus on office automation, industrial, and consumer/communications.

Allegro MicroSystems Europe is headquartered in Chertsey, United Kingdom, with a European sales and marketing operation, and operates a network of representatives and distributors throughout Europe. Allegro has a technical and marketing centre in Heidelberg in Germany. Allegro also has an engineering design centre in Edinburgh in Scotland and a technical and marketing centre in Annecy in France.

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