Steve Bush

2 weeks ago | electronicsweekly.com | Steve Bush

“Specifically designed for motor drive applications, this integrated solution combines two GaN FETs in a half-bridge configuration with drive, control, sensing and autonomous protection,” according to the company. Called NV6288, it is a 650V part with two 120mΩ GaN HEMTs in an 8 x 10mm PQFN 8×10 package.

2 weeks ago | electronicsweekly.com | Steve Bush

These are hybrid protectors, that combine a MOV (metal oxide varistor) with a gas discharge tube (GDT). The GDT blocks leakage currents through the MOV that may lead to premature failure, explained the company. “The comprehensive documentation required to validate this solution – especially in the absence of an existing IEC standard for hybrid over-voltage protection components – highlights our product team’s commitment,” said Bourns’ protection division president Craig Shipley.

2 weeks ago | electronicsweekly.com | Steve Bush

Now that I am properly worried about capacitor failure, I have taken photos of two of the X-capacitors on the same board (plus the lovely new electrolytic replacement already installed – bottom left in the photo). Both of the 1985 vintage X-capacitors are made by Philips.

2 weeks ago | electronicsweekly.com | Steve Bush

VOR1003M4T is an industrial-grade relay with a 1 Form A (single-pole normally-open) contact. On the output side there are back-to-back mosfets allowing ac or dc to be switched. Typical output-side figures are: 0.7Ω Rds(on), 500μs Ton, 100μsToff and <1μA leakage. These switching times are with 10mA drive and a 200Ω 50mA load. On the front-end, the device will be on with 5mA flowing through the input LED and off with 0.4mA, according to the data sheet.

2 weeks ago | electronicsweekly.com | Steve Bush

“These LEDs deliver smoother, more focused light output through optics compared to traditional square LES designs – perfect for premium flashlights, torches, bike lights and headlamps,” according to the company. Using the same 3.45 x 3.45mm footprint Cree’s XP led family, they are the XP-LR with an 1.7mm round emitter, and the 1.3mm diameter XP-GR. In both cases maximum current is 6A, and at 85°C this gives an output of 1,629 or 1,202 lm respectively.