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Reinforced Isolator Offers High Efficiency, Low Emissions

24 March 2017

ISOW7841 isolator is fabricated on single chip. Source: Texas Instruments ISOW7841 isolator is fabricated on single chip. Source: Texas Instruments Texas Instruments has introduced a single-chip reinforced isolator with integrated power that reportedly offers 80 percent higher efficiency than existing integrated devices. With efficient power transfer, low-radiated emissions and high immunity, this new reinforced isolator supports reliable operation of industrial systems, including factory automation, grid infrastructure, motor control, isolated power supplies and test and measurement equipment.

Compared to discrete solutions, the ISOW7841 integrates both isolated data and power, enabling a smaller bill of materials (BOM) and reduced board space, as well as helping with easier and faster system certification.

With low-power consumption, the ISOW7841 reduces device operating temperature by up to 40° C, enabling higher power delivery, higher channel count and longer system lifetime than other integrated solutions. Combining reinforced isolation and DC/DC conversion in a single package minimizes board space and cost for easier multichannel system design.

A working voltage of 1 kVrms helps provide improved system reliability and lifetime. The ISOW7841 supports an input voltage range of 3 V to 5.5 V, while delivering t 0.65 W of output power.

The ISOW7841 improves system signal integrity by minimizing system noise and providing robust electromagnetic compatibility to meet International Electrotechnical Commission (IEC) 61000-4-x standards for electrostatic discharge and electrical fast transient events. In addition, the reinforced isolator offers one of the highest levels of immunity available, reducing the effect of noise and high-voltage events on the industrial equipment.

The ISOW7841 reinforced isolator with a three forward/one backward channel configuration is the first device in the ISOW78xx family, with multiple devices expected later in 2017. The part comes in a 16-pin small outline integrated circuit (SOIC) wide-body package. This device is available in both fail-safe low and fail-safe high configurations.

Pricing starts at $5.50 in 1,000-unit quantities.

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