New Yorker Electronics releases Vishay’s eFuse load switches 

Four eFuse single-channel load switches by Vishay Siliconix. The 3.5A SiP32433A / SiP32433B and the 6A SiP32434A / SiP32434B eFuses integrate multiple control and protection features to simplify designs and minimize the need for external components to reduce external components, explained the distributor.

The single-channel eFuses feature programmable current limits and over-voltage protection in the compact 3.0 x 3.0mm TDFN package. They are designed to operate over a wide input voltage range (2.8V to 23V) with a 28Vin DC tolerance. 

According to Vishay, most competing solutions only offer voltages to 18V or are missing their low voltage side, whereas the input voltage range of the Vishay Siliconix single-channel load switches allows them to be used in a wider range of designs. For example, they are suitable for industrial and medical equipment, robotics, consumer goods, home automation systems, and gaming consoles, where they provide precise control and swift fault responses to enhance the safety and reliability of system designs. Upon switch-off due to latchable faults in these applications, the SiP32433A and SiP32434A are designed to latch the power switch off, while the SiP32433B and SiP32434B will auto-retry after a settable period of time.

All four devices respond swiftly to short circuits, and their precise over-current protection (OCP) is triggered at a set current limit level without an excessive overhead current requirement. This is an important characteristic for designs in which power buses need to support multiple loads. Alternative solutions often require overhead currents of more than 30 per cent, noted New Yorker Electronics. The SiP32433A and SiP32433B, with active reverse blocking, target applications featuring USB Type-C and multiple power source switching.

The load switches reduce on-resistance by 43 per cent compared to previous-generation switches. This translates into a 32 per cent higher current capability or increased efficiency at the same current level. The 78mW SiP32433A / SiP32433B has a current limit setting range of 0.3A to 3.5A, while the 33mW SiP32434A / SiP32434B offers a range of 0.5A to 6.0A. Both devices guarantee current limit accuracy down to ± eight per cent, increase design flexibility and simplify the bill of materials. The hot-swappable load switches feature a programmable turn-on slew rate, provide ESD tolerance of 2kV (human body model) and 0.75kV (charged device model) and operate over a temperature range of -40 to +125 degrees C.

Samples and production quantities of the eFuses are available now, with lead times of 20 weeks through New Yorker Electronics. As a franchised distributor, New Yorker Electronics supplies Vishay Siliconix power semiconductor products including low-voltage power MOSFETs, higher-voltage Vishay Siliconix power MOSFETs and power ICs.

New Yorker Electronics is headquartered in Northvale, New Jersey, USA. The global franchised distributor supplies electronic components, value-added services and supply chain solutions to OEMs and contract manufacturers in various markets.

Founded in 1948, the company is AS9120B and ISO 9001:2015 -certified and provides direct franchise access to an extensive, ready-to-ship inventory of passive, inter-connect, electromechanical and Mil-Spec components as well as semiconductor devices.

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