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Load switches suit motor drive applications

By Fairchild Semiconductor on

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Fairchild Semiconductor has developed the Accupower load switch series, designed to be a drop-in, integrated solution for consumer, industrial and computing applications.

The 2.8V to 36V integrated load switches are intended to address the designer’s mid-voltage needs.

Devices in the Accupower series of load switches include the FPF2700, FPF2701 and FPF2702.

Unlike current solutions that require discrete Mosfets plus external protection circuitry, Accupower load switches feature built-in protection to eliminate as many as four additional devices, saving more than 70 per cent board space.

Accupower is a series of current-limiting load switches that provide full protection to systems and loads that may encounter large-current conditions.

The series contains a slew rate controlled N-Channel Mosfet, which limits the amount of in-rush current.

This protects from abnormalities on the mains power supply rails.

The input voltage range operates from 2.8V to 36V.

Devices in the series offer low RDS(on) to optimise power losses across the switch and over the entire input voltage range.

Additionally, to address the emerging concern of current surges in these applications, Accupower load switches feature safe operation area (SOA) current limit protection, which guards against instantaneous short-circuit events and protects the system from failure.

Leveraging technological and process IP gained during the development of the Intellimax series of load switches, devices in the Accupower load switch series are said to be suitable for motor drives, portable power, digital cameras, industrial, and computing applications.

In addition, devices in the Accupower load switch series feature under-voltage lock-out (UVLO) protection and thermal shutdown protection.

Switch control is completed by a logic input (ON) capable of interfacing directly with the low-voltage control signal.

When the switch current reaches the current limit, the device operates in a constant-current mode to prohibit excessive currents from causing damage.

Fairchild Semiconductor

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