【经验】必易微反激控制器KP2201驱动脚无输出的原因分析及问题解决
必易微推出的反激控制器KP2201是一款针对离线式反激变换器的高性能电流模式准谐振PWM控制器。芯片集成了700V高压启动、输入掉电检测以及X电容放电功能,可以满足快速启动和超低待机的要求。芯片采用绿色节能模式、打嗝模式、中载谷底导通模式等优化系统效率,可轻松满足六级能效要求。
KP2201内置高精度的65KHz开关频率振荡器,集成了斜坡补偿、软启动、抖频技术和环路增益调节等功能。其系统的稳定性、可靠性、电磁兼容性得到极大的提升。此外,VDD的工作电压范围可支持8V-70V,最大输出功率可达100W,非常适用于PD快充等宽电压输出的适配器。芯片的典型应用图如下图所示。
图1 KP2201典型应用图
客户在脱毛仪项目中,需要将输入的220V市电整流后,升压到400V左右,并将能量贮存在电容中,在使用时,通过电容快速放电实现功能。客户之前使用的隔离升压芯片为安森美的FAN6300A,客户在使用时,直接将KP2201原位焊接在PCB板上进行测试。部分原理图如下图所示,FAN6300A的位置改为KP2201。
图2 电源部分原理图
客户在实际测试中发现,KP2201的GATE脚没有输出PWM驱动信号,电路没有正常工作,初步推测是芯片没有正常启动造成的。结合原理图和KP2201典型应用图,可以发现,客户在测试过程中,高压启动引脚HV应该上拉至输入电压,做桥后高压启动。和客户沟通后得知FAN6300A无需接启动引脚也可以工作,故客户忽略了这点。
图3 KP2201内部功能框图
根据KP2201的内部功能框图可以发现,HV引脚在上电瞬间给芯片供电,芯片启动后改由辅助绕组经VDD引脚给芯片持续供电,保证芯片正常运行。此外,HV引脚还集成欠压和掉电保护功能,因此,建议客户在设计和测试KP2201等具有高压启动功能的AC-DC反激控制芯片时,务必在连接HV引脚,在保证电路工作的同时,为电路提供保护,保证整个系统的平稳正常运行。
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产品型号
|
品类
|
封装
|
拓扑电路
|
最大功率(W)
|
工作模式
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最高频率(kHz)
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输出特性
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启动方式
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能效标准
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待机功耗(mW)
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VDDmax(V)
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KP212
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PSR 控制器
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SOT23-6
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Buck/Flyback
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65
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DCM
|
70
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CC&CV
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电阻启动
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六级
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<75
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30
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原厂动态 发布时间 : 2024-07-29
必易微(KIWI)IOT领域电源管理芯片产品介绍
型号- KP2190,KP311AWPA,KP20H,KP3281DP,KP2191,KP4110-1-2,KP2192,KP212,KP86888,KP3116WPA,KP2501,KP86884,KP206A,KP216,KP3210BSGA,KP206B,KP214,KP3224DP,KP3205SGA,KP3310,KP3126SG,KP23111,KP2182,KP23110,KP101,KP201E-H,KP15026VPA,KP86888S,KP3110-2-4-6,KP201A-H,KP3116SGA,KP22306,KP322XDP,KP216X,KP15012SPA,KP23132M,KM8684NQ,KP3221DP,KP3282DP,KP15026,KP3310DPA,KP3210-1-2B,KP3211BDP,KP2201-B,KP2326,KM868X,KP1513,KP3114WPA,KP146X,KP2164,KP206A-B,KP2162,KP2202,KP3120SPA,KP2161,KP201,KP18026,KP15026WPA,KP3112LGA,KP214X,KP2182X,KP206,KP3114SGA,KM8688NQ,KP4055,KM8684NS,KP3126,KP226X,KP2061-4,KP23266,KP15014SPA,KP23264,KP4051,KP201-E-F,KP1511X,KP3210SGA,KP322X,KP201X,KP321ABSGA,KP3110,KP3222DP,KP1452,KP3221SG,KP4124X,KP2313X,KP201H,KP23133M,KP201F,KP18051ESPA,KP41242,KP3211BSGA,KP41240,KP41241,KP23152,KP15012-4,KP3210BDP,KP23151,KP201A,KP23150,KP1512X,KP201E,KP201B,KP201C,KP212X,KP36673-4,KP35015,KP3221SGA,KP2010,KP2131,KP3310SPA,KP3112SGA,KP2011,KP2132,KP2130,KP2012,KP2013,KP3284DP,KP3126SGA,KP18061ESPA,KP1315X,KP3110SPA,KP2126,KP4050-A,KP18055ESPA,KP2801,KP142X,KP1030,KP2120,KP2124,KP328X,KP2122,KP311ALGA,KP23133,KP18069,KP23132,KP3212BDP,KP226XH,KP41240-1-2,KP141X,KP401,KP2591,KP21821-2-4,KP206X
【应用】带快速关断功能的副边同步整流控制器KP4050LGA用于LED电源,耐压高达180V
某客户的项目是100W LED电源,项目需要一款反激同步整流芯片来提高效率。根据客户需求,本文推荐必易微推出的带快速关断功能的高性能副边同步整流控制器KP4050LGA,高耐压180V;采用高压供电模块,无需辅助绕组供电,更低成本。
应用方案 发布时间 : 2023-01-30
必易微携电机驱动产品解决方案,亮相第七届中国电机智造与创新应用暨电机产业链交流会
2024年6月28日,第七届中国电机智造与创新应用暨电机产业链交流会在杭州成功举办,必易微电机驱动产品解决方案以其优异的性能与特色吸引了与会者的广泛关注。与现场的客户朋友、行业伙伴、领域专家进行了深入交流与探讨,促进了彼此之间的信息共享,使大家能够更加全面地了解必易微的创新产品方案。
原厂动态 发布时间 : 2024-07-09
必易微参加慕尼黑上海电子展,提供一站式芯片解决方案和系统集成
必易微邀您参加024年7月8-9日在中国上海市浦东新区龙阳路2345号上海新国际博览中心举办的慕尼黑上海电子展 。
原厂动态 发布时间 : 2024-07-05
必易微(KIWI)家用电器电源选型指南
目录- 公司介绍 家用电器电源产品选型表 家用电器电源产品方案和应用介绍
型号- KP3282,KP21825C,KP3281,KP52X218,KP311A,KP2264H,KP311B,KP522211,KP3116,KP525208,KP525201,KP86202,KP86201,KP36374,KP36572,KP82201,KP36373,KP8110X,KP521405,KP522218,KP521403,KP3114,KP3112,KP3311,KP3210B,KP521403A,KP522201,KP526208,KP523211,KP81103,KP81102,KP85302,KP81101,KP85301,KP3221,KP522208,KP522405,KP3224,KP523218,KP3222,KP85309,KP2161M,KP3211B,KP2262H,KP526201,KP2126,KP321AB,KP36675,KP36674,KP36673,KP85211,KP523201,KP52X201,KP523208,KP3212B,KP52X208,KP2161,KP521405A,KP3206,KP3205,KP524201,KP85321,KP52X211,KP3284,KP524208,KP21824M
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可定制板装式压力传感器支持产品量程从5inch水柱到100 psi气压;数字输出压力传感器压力范围0.5~60inH2O,温度补偿范围-20~85ºС;模拟和数字低压传感器可以直接与微控制器通信,具备多种小型SIP和DIP封装可选择。
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定制水冷板尺寸30*30mm~1000*1000 mm,厚度1mm~50mm,散热能力最高50KW,承压可达3MPA;液冷机箱散热能力达500W~100KW。项目单次采购额需满足1万元以上,或年需求5万元以上。
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