The STR-G6551 from Allegro MicroSystems is a fixed off-time switching regulator integrated circuit capable of handling up to 60 W. The 5-pin overmoulded TO-220 packaged device uses a hybrid construction incorporating an avalanche rated power MOSFET and a fixed-frequency mixed-mode control IC. The power MOSFET is rated at 700 V.
The control IC operates at 100 kHz, and has a built-in oscillator, undervoltage lockout, pulse-by-pulse current-limiting, programmable overcurrent protection, latched overvoltage protection, timer latched overload protection, and latched thermal shutdown.
A digitally controlled built-in soft-start facility limits the switch current at start-up without the need for additional external components. The fixed 16 µs off-time at start-up limits dissipation in the power switch. Maximum frequency of operation is 63 kHz. Noise filtering is by means of a switched-attenuation filter technique that also enhances stability at light load.
The manufacturer says the device offers a robust, economical, low-risk solution for off-line switch-mode power supplies, particularly where management of electromagnetic interference at the source is a significant element of the system design.
Video Reel: Microchip’s SAM L11 30 June 2020, Altron Arrow
, Multimedia, Videos
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, Power Electronics / Power Management
While many battery technologies have come to the forefront, lead-acid has remained the most well-known and cost-effective chemistry. Gel and AGM technologies have revolutionised this technology even further. ...
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XP Power has released a new series of convection cooled, 600 W AC-DC power supplies. The ultra-compact power supplies deliver full load power under a wide range of conditions without additional cooling. ...
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Shortly after unveiling the brand-new DIN-rail mounting DC-DC converter family, the DDR-15/30/60/120/240 series, Mean Well has announced the DDR-480 series (480 W) to enable integration into higher-power ...
Read more...The revolution of LTO battery technology 30 June 2020
, Power Electronics / Power Management
Potential applications of LTO technology include solar and alternative energy storage, heavy motor vehicle and industrial applications, as well as power sources for remote communication systems.
Read more...iCoupler technology benefits GaN transistors in AC-DC designs 30 June 2020, Altron Arrow
, Power Electronics / Power Management
Highly efficient AC-DC power supplies are key to the evolution of the telecom and datacom infrastructure, as power consumption grows rapidly due to hyperscale data centres, enterprise servers, or telecom ...
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