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采用VIPower技术的SMPS(开关电源)单片解决方案ST

简介:VIPerXX开关电源系列器件具有优化的电流模式控制器和完整的内置保护电路,是最容易实现和Eco标准兼容的”蓝天使”和”节能星”解决方案,当系统在待机状态时从火线上消耗的总功耗小于1W.

问:VIPER在工作中,如果外围电容出现变质(比如,容量变大或变小),会不会使输出电压出现突变,电压上升烧坏相关部件(在某些如显示屏之类的用电设备有此种情况出现),如果有这种情况出现,是否有解决输出电压过高抑制的方法,谢谢!!
答: normally the cap value will decrease, and then the ripple on cap will increase, if in primary then the current flow in main switch will increase, could be burn your main switch. thanks

问:是否需要使用光耦合器或光隔离器?为什么?
答: you can use a zener for primary regulation to remove the opto coupler, but the output voltage pricision is poor.thanks

问:VIPower中MOSFET抗浪涌的能力有多大?尖峰电压呢?
答: Viperx2 Viperx3 Series are different, please check from dadasheet.

Tks

问:请问:如何在省掉共模电感和y电容的情况下通过EMI(即设计时需要注意些什么)?
答: 1)it ia very important to design the transformer.
for example:(1)shielding windings
            (2)windings sequence
           &

问:viper smps用在90W功率的电源时,请问,转换效率能做到多少,用在便携式产品上可以吗?
答: Viper can not make 90W SMPS in wide range.

TPA products fro ST can be used.
Tks

问:家电检验过程中要求打高压(1500V,机壳对大地),用普通变压器可以通过,ViPer12是否可以?
答: Viper12 ok for this.

问:考虑EMC,EMI时,是否需要前置滤波器?

答: With Filter compenent will be better.
Thks.

问:1 贵司开发的VIPER系列的成本是否具有竞争力。
2 FAIRCHILD所采用的抖动技术,已经将滤波器省略,贵司是否有相应的技术。
多谢

答: 1,Viper cost is perfect in performance price ratio.
2,ST products(with frequecy jitter) on going.
Thks

问:请问:我现有一电源要求足5v-2.5A,12V-0.25A是否可用VIPer22A实现,变压器怎样设计。谢谢!
答: 2 output in one SMPS? wide range input85-265?
if yes,power is 15.5W you can use Viper53E, get reference design from www.st.com/viper software.

if 5v/2.5A one SMPS,Power 12.5W 12V/0.25A one SMPS can use Viper22ADIP in wide range input.

问:采用Vipower 作手机充电器可以满足没有Y电容的要求吗
答: YES.