诚信经营，质量为首，诚信至上，真诚为您服务--------------------------------------------------允许我给您介绍下这个产品和我们的服务：现货全新原装***15天质量问题无条件包退换一年质保完善的***服务雄厚的技术人才后盾真正的为客户排忧解难客户的满意是对我们的肯定更是我们的动力单子,得之,我幸。不得,我力争到底全心服务--------------------------------------------------ABB3HAB6914-1DSQC340优质的产品★优质的价格★优质的***★优质的服务，是您***佳的选择！图6电源效率与输入电压的关系曲线2.2.3电路设计要点1）采用双极型功率开关管（VT）（1）选择双极型开关管VT，要能承受较高的电压并提供足够的电流，其电流放大系数要足够高。（2）选择R14以提供足够大的基极电流，确保能够开启DC／DC电源变换器。（3）选择R16（典型值为10～20Ω）以限制在开关过程中产生的尖峰电流。（4）推荐采用Fairchild公司生产的TIP29C型双极型中功率开关管，其主要参数如下：集电极—发射极击穿电压UU（BR）CEO=100V，基极***大允许电流IBM=0.4A，***大集电极电流ICM=1A，集电极***大功耗PCM=30W，hFE=75倍，fT=3.0MHz。2）采用功率MOSFET（V3）（1）选择R14以限制稳压管VDZ4和VDZ5的功耗。（2）选择R15以确保在输入电压低于28V时能关闭V3。（3）选择VDZ4的稳压值以防止在输入电压低于28V时开启V3。（4）注意，R14及R15的电阻值还影响到VDZ4的损耗。（5）选择VDZ5的稳压值以限制V3的***大栅－源电压（典型值应为15V）。（6）推荐采用Philips公司生产的IRF530N型N沟道功率MOSFET。其主要参数如下：漏－源极击穿电压U（BR）DS=100V，***大漏极功耗PDM=79W，漏－源通态电阻***（ON）=80mΩ，跨导gFS=11S，导通时间tON=36ns，关断时间tOFF=12ns。3结语特种集成开关电源的种类很多，还可以设计LED驱动电源、地面数字电视播放（DVB－T）电源及电源适配器等新产品；而LinkSwitch系列***率恒压／恒流式三端单片开关电源、LinkSwitch－TN系列及DPA－Switch系列单片开关电源的问世，为实现中、小功率特种开关电源的优化设计创造了有利条件。30480863R0406123HNM06839-13HAC020898-0013HNM06181-13HAC11425-13HNM03884-13HNM12626-13HNM14009-13HNM11028-13HNM07898-13HXH1000-2573HXH1000-13699831133HAB7336-11574828805000948805000948825000948833HEA801780-0014133590015538048805526800014412318802162195-13669028813HNM00849-13HNM12322-13HAC11650-13HNP02422-13HNP00191-13HNP00192-13HNP00239-13HNP00241-13I0195853HNM02066-13HNM02155-13HNM04659-12529316-12529316-225291926-120065913HNA009755-0013HAC2090-15038720013HAC029893-0013HAA2594-13HAC028525-0053HAC0743-13HNA007903-00199818493HAC12937-73HAC13423-93HAC021899-0023HAC10470-33HAC026771-0013HAC023552-0013HAC10470-13HAC16402-13HAC5354-13HAC16403-13HNA011647-0013HAC3399-13HAC5356-13HAC020397-0013HAC020398-0013HAC020399-0013R0218733HA***21-13HAC15571-34944026-54944016-23I0050573HNE00413-13HAC020105-0013HAC16831-14944026-43HNA012690-00100AAGRSR203HAB7812-13HNE03277-1E3HAC5393-23HAB2038-13HAC032343-0043HNE08791-13HAC026100-00163990019-2996257799833625044058833HAC021719-0019111139221532021-3071902401124165070014373670015042180013HAA2130-13HAC5246-353HAC7504-13HXB1000-3383HXG1135-23HXH1000-44463550006-4353HNM04091-13HNM13971-13HNA013095-0013HNM03267-13HNM03357-13R0215053048278304829199178773HNA008932-0013HAC8954-15013370501337150133745013375501337850133805013381945011965841991835099809249110118563550006-26322130084-23HAB3537-13HAB3684-13HAC15984-113HAC8947-14334240013HAA2038-13HAA2040-13HAB3512-13HXH1000-45763550006-26299662693046473911048059110480691104808911048099917834996256930421453HAB3233-14326130014326160014396480012219238-382219238-413HAA1001-413HAB4334-13HXB1000-153HXC1000-11063550006-27763550006-2803HNM03531-13HNM03629-13HAB9327-13HAC6788-13HNM03641-13I0029403I0046943I0050923HNM03296-13HNM01629-13HAC028087-00130428423I0102272216264-192216272-83HAA2058-133HAA2092-113HAA2092-123HAC10088-43HAC10089-23HNM02164-13R0430003R0438713R0441733R044613HNM11457-13HAA1001-855003550033HAC14871-1YB560103-AEYB560103-***YB560103-BM3HAB2208-13HAB6372-13HAC0261-13HAC2424-13HAC2425-13HAA3563-APA3HAA3573-ACA68960011-NZ3HAA3563-AKA3HAA3573-AJA3HAC10390-23HAC10390-43HAC10390-63HAC023625-0013HAB5510-13HAA2242-13HAB6354-13HAB3340-13HAC0110-13I0063492969105-113R0210352162194-1453HAC024779-0013R0127833HNM08033-1CS-2221CS-22233HAC6964-13HAC9484-13HAC6967-13HAC025481-0013HAC10292-16531270-A3HAC021031-0023HAC028470-0013HAC030868-0013HAC032124-0033HAC14214-13HAC020691-0013HAC020692-0015537768805550658806599008-FE6599008-F6599008-H3HAC15083-13HAC15083-23HAC9534-13HAB4216-13HAB4217-13HAC9485-13HAA1001-1713HAA1001-666)