Barrier rectifier for MR16 lamps

Power Electronics / Power Management

13 July 2016 Power Electronics / Power Management

The SBRT3M40P1 Trench Super Barrier Rectifier (SBR) introduced by Diodes Incorporated has been optimised to deliver a low forward-voltage drop in a small form factor while maintaining low reverse-current leakage. This capability addresses requirements for input bridge rectifiers in solid-state lighting (SSL) applications focused on 12 V a.c. LED retrofit lamps, which provide a more efficient and longer life alternative to popular MR16 halogen bulbs.

Operating at +125°C, this 40 V rated device has a low reverse-current leakage of only 1,2 mA at 12 V blocking, which provides immunity to thermal runaway under the high ambient temperature environment of an MR16 retrofit. Furthermore, it maximises the 1 A bridge rectifier efficiency and power density with only a 0,29 V forward-voltage drop in a compact PowerDI 123 footprint of 6,75 mm².

To minimise forward loss, the SBRT3U40P1 is an alternative device that provides a lower forward-voltage drop of 0,25 V at the expense of an increase in the reverse-current leakage to 4 mA. Options for different forward loss and reverse leakage enable the rectification circuit to be optimised depending on the waveform’s duty cycle requirements and operating temperature.

A 40 V blocking capability normally provides sufficient headroom for a 12 V a.c. input supply, however, if the line regulation is poor then the SBRT3M60P1 and SBRT3U60P1, with their 60 V blocking capability, give extra headroom at the expense of their slightly higher forward-voltage drop of 0,34 V and 0,28 V, respectively.

While a conventional SMA package option is available, the PowerDI 123 package offers a smaller footprint (6,75 mm² compared to 16 mm²) and lower height profile (<1 mm compared to 2 mm) for space-critical applications like the target MR16 retrofit bulb market.

For more information contact Michael Nel, Avnet South Africa, +27 (0)11 319 8600, [email protected], www.avnet.co.za

Share this article:

High-performance DC-DC converter
Conical Technologies Power Electronics / Power Management
With a wide 9 - 40 V DC input range, the Claf Power DWHB400-F24xxN series is a high-performance DC-DC converter family ideally suited for 12 V and 24 V battery-based systems including vehicles, off-grid installations, and distributed power architectures.

Read more...

DC-DC converters for next-generation IoT
iCorp Technologies Power Electronics / Power Management
AIPUPOWER’s K78XXJT-500R3 and K78XXJT-500R3-LB give designers a compact, high-efficiency power option for battery-powered and space-constrained systems, combining up to 96% efficiency with no-load input current as low as 0,2 mA.

Read more...

240 W in compact form factor
Brabek Power Electronics / Power Management
The cost-effective and reliable RECOM RACPRO1-S240E DIN-rail mount AC-DC series is only 125 x 139 mm and 39 mm wide, yet provides 240 W output.

Read more...

You cannot manage what you cannot measure
Power Electronics / Power Management
South African sites are generating solar energy. Most still have no idea what is consuming it… or when, or why. Intelligent load management hardware is changing that.

Read more...

Scalable and intelligent power solution
Power Electronics / Power Management
Designed for Africa’s rapidly evolving energy landscape, Bluetti’s ES125 offers a scalable, intelligent power solution that delivers reliable and cost-efficient electricity for uninterrupted operations.

Read more...

Simulating grid abnormalities
Conical Technologies Power Electronics / Power Management
Simulating grid abnormalities has become an essential part of validating systems such as inverters, UPS units, photovoltaic inverters, and EV charging infrastructure.

Read more...

Categories

Power Electronics / Power Management

Barrier rectifier for MR16 lamps

Further reading:

Publications by Technews