Allegro Introduces New Family of Low Power Off-Line SMPS Primary Regulators
Allegro announces a new line of low-power off-line SMPS primary regulators targeted at the consumer electronic, industrial appliance and home appliance markets.
Allegro’s STR-W67xx series includes quasi-resonant topology ICs designed for SMPS power supplies, showing lower EMI noise characteristics, especially at more than 2 MHz, higher than conventional PWM solutions. They utilize a soft switching mechanism to turn on the internal MOSFET at a close point to ground level (VDS bottom point) through the resonant phenomenon of a primary inductor and resonant capacitor.
The bottom-skip function skips the first bottom of VDS and turns on the MOSFET at the second bottom point to minimize the increase of operational frequency at light output load, improving system-level efficiency over the entire load condition. Two standby functions reduce the input power at very light output load conditions; one is an auto-burst mode operation internally triggered by sensing on-time, and the other is a manual standby mode that is executed by clamping the secondary output.
In general applications, the manual standby mode reduces the input power most as compared to the auto-burst mode. The soft-start function minimizes surge voltage and reduces power stress to secondary rectifying diodes during startup sequence. Various protections, such as overvoltage, overload, overcurrent, maximum ontime protection and avalanche-guaranteed MOSFET, secure good system-level reliability.
The package is a fully molded TO-220, which contains the controller chip and MOSFET, and enables output powers up to 160 W at 120 VAC input, or 240 W at 230 Vac input.
1.The news above mentioned with detailed source are from internet.We are trying our best to assure they are accurate ,timely and safe so as to let bearing users and sellers read more related info.However, it doesn't mean we agree with any point of view referred in above contents and we are not responsible for the authenticity. If you want to publish the news,please note the source and you will be legally responsible for the news published.
2.All news edited and translated by us are specially noted the source"CBCC".
3.For investors,please be cautious for all news.We don't bear any damage brought by late and inaccurate news.
4.If the news we published involves copyright of yours,just let us know.
Next Steinmeyer Introduces New Low Profile Stage
BRIEF INTRODUCTION
Cnbearing is the No.1 bearing inquiry system and information service in China, dedicated to helping all bearing users and sellers throughout the world.
Cnbearing is supported by China National Bearing Industry Association, whose operation online is charged by China Bearing Unisun Tech. Co., Ltd.
China Bearing Unisun Tech. Co., Ltd owns all the rights. Since 2000, over 3,000 companies have been registered and enjoyed the company' s complete skillful service, which ranking many aspects in bearing industry at home and abroad with the most authority practical devices in China.
