【经验】必易微离线式线性稳压器KP3310实际设计中的5个注意事项
KP3310是必易微一款紧凑型无电感设计的离线式线性稳压器，外围极简，典型电路只需3个器件，本文将分享KP3310在实际设计中的5个注意事项。
图1：KP3310典型应用电路
一、带载能力：
KP3310峰值带载能力为40~50mA。稳态带载能力与温升表现有关，SOP封装建议小于20mA，DIP封装建议小于30mA。
二、VDD电容设计：
VDD电容容值可按公式计算：
建议选取范围在220uF~470uF。容值越小，系统启动速度越快，IC温升越低；容值越大，峰值带载能力越大，受输入电压波动的影响越小。
三、PCB layout：
适当增大Drain端敷铜面积，有助于提高散热效果，降低IC温升。
四、整流后不能放电容：
KP3310需检测到工频包络才能正常工作，故整流后不能放置滤波器件（如电解电容）。
五、老化注意事项:
若使用调压器为多台KP3310样机进行通电老化（如50台以上），输入电压波形可能存在畸变，影响IC的AC检测及MOS开通逻辑，可能导致IC损坏。建议使用变频稳压电源进行老化，或减少同时老化的台数。
- |
- +1 赞 0
- 收藏
- 评论 0
本文由辣椒炒肉提供，版权归世强硬创平台所有，非经授权，任何媒体、网站或个人不得转载，授权转载时须注明“来源：世强硬创平台”。
相关推荐
【经验】离线式线性稳压器KP3310输出纹波过大问题分析
必易微电子KP3310是一款紧凑型无电感设计的离线式线性稳压器。用于取代传统的阻容降压方案，具有很多优点。某客户在测试时，发现输出电压纹波较大，达到50mV。KP3310内部是LDO输出，纹波通常情况下小于10mV。故本文将分析并解决该问题。
【经验】必易微原边控制器KP2122MSGA重载条件下无法启动问题分析
某用户用必易微的原边控制器KP2122MSGA做12W（12V/1A）方案，AC220下输出12W，85~265AC输出10W，调试中出现芯片无法重载正常工作，本文将分析并给出建议。
【经验】使用必易微PWM控制功率开关KP3210BSGA观察和理解DCDC的应用和性能
很多开发设计者在设计电路原理图之前首先会考虑电源部分选用和设计验证；为了方便设计则观察和理解一个DCDC的应用和性能；本验证方案选用了必易微的一颗PWM控制功率开关KP3210BSGA来看看他的性能。
深圳市必易微电子股份有限公司
型号- KP52X20X,KP22065A,KP3282,KP13262,KP52X218,KP23130M,KP3281,KP311BH,KP13264,KP206D,KP16014A,KP206A,KP206B,KP36374,KP1326A,KP36373,KP12761FQ,KP21825CB,KP2064,KP22066A,KP524208A,KP2182,KPE30182M,KP40581P,KP30172M,KP21822M,KP85303,KP571106X,KP85302,KP1315A,KP85301,KP21822F,KPE30181M,KP107W,KPE90772B,KP40511,KP40512,KP107L,KP620303,KP23132M,KP1071CL,KP23132K,KP107Q,KP10780L,KP23162,KP23161,KP23160,KP21824BM,KP620305,KP521111A,KP21823M,KP523201A,KP35026,KP1469A,KP85211,KP35022,KP1074,KP52X201,KP1073,KP1194,KP1076,KP522211D,KP522211B,KP52X208,KP23264M,KP522211A,KP1469K,KS11062E,KP1191,KP1190,KP22086,KP1072,KP10781L,KP1193,KP13251,KP1192,KP22083,KP13252,KP22082,KP13134,KP13255,KP22081,KP13254,KP22080,KP523201C,KP13135,KP523201B,KP523201D,KP85201,KP85321,KP57223X,KP1184,KP52X211,KP35031,KP21824H,KP40612,KP3126,KP40613,KP4214,KP21824M,KP4213,KP21824L,KP40611,KP23122M,KP23267,KP23267M,KP21825C,KS082,KP4050,KP86202,KP86201,KP571115X,KP36573,KP36572,KP40660B,KS11064E,KP522201D,KP522201C,KP522201B,KP522201A,KP22066,KP22064,KP722XX,KP3501A,KP23151,KP22062,KP23150,KP70211XS,KP70211XT,KP523208B,KP523208A,KP523208D,KP1274FQH,KP523208C,KP2315A,KP1274FQC,KPE90771,KP2206A,KPE90773,KP21827B,KP22035,KP107BQ,KP23112M,KP22033,KP23121,KP52X10X,KP14651,KP14652,KP12353,KP12354,KP14653,KP14654,KP36675,KP36674,KP520411,KP36673,KP520419,KP21827M,KP23111M,KP107CQ,KP23132,KP23131,KP23130,KP90831,KP1274FNQ,KP90477X,KP523218D,KP523218A,KP35112,KP523218B,KP3284,KPE90874,KP1271FH,KP7122,KP522218D,KP522218B,KP522218A,KP18003B,KP16015,KP18003A,KP1271FN,KP16014,KP16017,KP1070L,KP22080H,KP18002F,KP1070Q,KP1601A,KP521401,KP12760F,KP521405,KP521403,KP7112,KP521409,KP22308A,KP522302E,KP15051,KP14622H,KP15052,KP22082A,KP22082B,KP14634A,KP1071L,KP32622,KP1601X,KP1505A,KP1071Q,KP81103,KP81102,KP81101,KP520421,KP1271FC,KP520429,KP1272FH,KP522208D,KP522208C,KP521119A,KP522208B,KP522208A,KP18320A,KP1272FN,KP14633A,KP40662B,KP21827,KP21824,KP21825,KP21822,KP4060,KP93101,KP41540,KP14632A,KP32601,KP83201A,KP83201B,KP83201C,KP40661B,KP521411,KP41662,KP1272FC,KP521419,KP23162M,KP40561,KP23162K,KP2822,KP12684FM,KP85632,KP85631,KP522405A,KP522405B,KP40562,KP40511P,KP31616,KP421,KP31614,KP22062A,KP1601,KP522403,KP522405,KP23152M,KP2806,KP18001A,KP521101,KP321AB,KP521103,KP521102,KP522312,KP52230X,KP12760FQ,KP521109,KP35064,KP521108,KP522318,KP521107,KP522403A,KP35062,KP12762F,KP522403B,KP14636L,KP522308E,KP14624H,KP15113,KP15114,KP511419,KP15111,KP521401A,KP15112,KP22064A,KP85402,KP1402A,KP522302,KP83102,KP12761F,KP522308,KP408X,KP1402D,KP127FQ,KP42262,KP18032,KP42261,KP1271FNQ,KP212,KP40612B,KP1078CL,KP2264H,KP10790,KP10791,KP10792,KP1078R,KP523302,KP2591A,KP521001,KP52220X,KP521009,KP1079A,KP523308,KP3210B,KP68301,KP521403A,KP40611B,KP1164M,KP2120B,KP522201,KP521111,KP22308,KP521119,KP22306,KP1076C,KP511101,KP2262H,KP512318,KP511109,KP32551,KP1511,KP523201,KP1078AL,KP1077A,KP1077B,KP41260,KP41261,KP2806A,KP68321,KP41262,KP521405A,KP5711XXX,KP201,KP1078BL,KP10780,KP18026,KP10781,KP28071,KP30262,KP522101,KP512318D,KP28134A,KP206,KP523312,KP13135A,KP22315A,KP40512M,KP1078A,KP1078B,KP523318,KP1078C,KP1273FN,KP41260D,KP1074L,KP14631A,KP511009,KP10750,KP10751,KP10752,KP1074Q,KP1455,KP28033,KP28032,KP3637,KP28034,KP1075A,KP1075B,KP1075C,KP70311X,KP18003,KP41361,KP22305L,KP10760,KP10761,KP10762,KP1075Q,KP30362,KP1326,KP28162,KP1325,KP22305A,KP52320X,KP1273FC,KP1076A,KP12682F,KP1076B,KP1274FC,KP2801A,KP2813A,KP18330,KP1274FH,KP1274FN,KP32511,KP1274FQ,KP2161B,KP1072L,KP32512,KP1313,KP119,KP1072Q,KP1315,KP526201C,KP116,KP526201B,KP526201A,KP118,KP22306A,KP52420X,KP21863,KP521409A,KP18106,KP123,KP122,KP18103,KP1073L,KP18108,KP1073Q,KP30584,KP3251A,KP23223,KP23223M,KP526208C,KP526208B,KP526208A,KP1273FQC,KP107AL,KP1463A,KP3310,KP1255,KP3311,KP23112,KP107AQ,KP23111,KP23110,KP571110X,KP2311A,KP2202A,KP2212,KP70311XT,KP70311XS,KP70211X,KP41262C,KP90641,KP525201A,KP12551,KP525201C,KP525201B,KP12553,KP12554,KP2205,KP2206,KP2203,KP2126B,KP2208,KP2201,KP2202,KP1234,KP90871,KP90872,KP41261C,KP90873,KP41261D,KP571100X,KP14622,KP14623,KP14501,KP1272FQH,KP52520X,KP2212B,KP1272FQC,KP1221,KP1462,KP1220,KP1465,KP1222,KP512318S,KP90661,KP1182,KP641100,KP311A,KP311B,KP3116,KP525208B,KP52620X,KP525208A,KP525208C,KP653202,KP653201,KP2264,KP3111,KP52X302,KP2262,KP13134A,KP3114,KP3112,KP642201,KP201H,KP642202,KP642203,KP201F,KPE201K,KP68500,KP1272FNQ,KP642200,KP201A,KP571130X,KP523211B,KP523211A,KP201E,KP523211D,KP201B,KP201C,KP2210A,KP1162,KP2011,KP3221,KS11064,KP1164,KS11062,KP2591(A),KP2012,KP3222,KP2013,KP620105,KP521909,KP18053,KP641003,KP1274F,KP620103,KP3211B,KP18058,KP18057,KP18056,KP18055,KP212A,KP18059,KP127F,KP321B,KP2122B,KP1271FQH,KP1271FQC,KP521901,KP18061,KP15113A,KP3212B,KP18062,KP18069,KP18068,KP68520,KP571120X,KP3206,KP2123B,KP3205,KP15114H,KP2591,KP524201A
必易微ACDC产品选型表
必易微提供以下技术参数型号为PN级的AC-DC产品选型，包含LLC 控制器,PFC 控制器,PFC 转换器,PSR 控制器,PSR 转换器,SR 控制器,SR 转换器,SSR 控制器,SSR 转换器,电池监控保护器,非隔离控制器,非隔离转换器,高压智能线性稳压器等，具有CV、CC&CV、CP&CV多种输出特性，低压&高压以及电阻启动方式，Buck/Buck-Boost/Flyback等多种拓扑电路结构，六级能效标准，待机功耗最低可＜20mW。必易微ACDC产品具有SOP-7、DIP-7、SOT23-6等多种封装，具体下单型号可参考产品数据手册。
|
产品型号
|
品类
|
封装
|
拓扑电路
|
最大功率(W)
|
工作模式
|
最高频率(kHz)
|
输出特性
|
启动方式
|
能效标准
|
待机功耗(mW)
|
VDDmax(V)
|
|
KP212
|
PSR 控制器
|
SOT23-6
|
Buck/Flyback
|
65
|
DCM
|
70
|
CC&CV
|
电阻启动
|
六级
|
<75
|
30
|
选型表 - 必易微 立即选型
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
LED照明驱动产品介绍
型号- KP18001WPA,KP1079XWPA,KP15062SPA,KP421LGA,KP1271FNSPA,KP116SPA,KP15113SPA,KP1162SPA,KP1511SPA,KP1313X,KP14654DP,KP1271FCSPA,KP1191SPA,KP14653SPA,KP1222SPA,KP3310,KP10772WPA,KP1255,KP107LSPA,KP119SPA,KP1325SPA,KP3310DP,KP1505ASPA,KP1059BWPA,KP15026VPA,KP123X,KP1199BWPA,KP1466SPA,KP106,KP122SPA,KP1273FCSPA,KP13134DP,KP107W,KP119X,KP10790WPA,KP107L,KP15114DP,KP18011,KP1234SPA,KP18011ESPA,KP15026,KP1272FHSPA,KP15111SPA,KP1511,KP1059AWPA,KP107WSPA,KP15051SPA,KP1465SPA,KP10770WPA,KP4500,KP1077XWPA,KP1164MSPA,KP14663CSPA,KP107XL,KP15114SPA,KP1272FCSPA,KP1272FNSPA,KP13135DP,KP14652SPA,KP10792WPA,KP1192DP,KP18108WPA,KP18002FESPA,KP1079AWPA,KP1274FHSPA,KP1255SPA,KP1262FCWPA,KP1511X,KP1313LGA,KP3310SGA,KP1263FCWPA,KP1059CWPA,KP1466X,KP106SPA,KP1501AVPA,KP12353SPA,KP10791WPA,KP116X,KP14652DP,KP4213ESGA,KP1220SPA,KP127XFC,KP1274FNDP,KP421SPA,KP12762FWPA,KP127XFN,KP1192SP,KP1325,KP1501A,KP15052SPA,S4223,KP1193DP,KP126XFCWPA,KP15114HSPA,KP18062ESPA,KP1274FNSPA,KP1272FNDP,KP15062,KP14664MSPA,KP18106WPA,KP15064,KP1276XFWPA,KP1164SPA,KP18061ESPA,KP1274FCSPA,KP14653DP,KP1199AWPA,KP18055ESPA,KP123SPA,KP14651SPA,KP12761FWPA,KP4500SGA,KP1077AWPA,KP14662SPA,KP1805X,KP1261FCWPA,KP1806XWPA,KP14662CSPA,KP1059XWPA,KP1465X,KP1194DP,KP1221SPA,KP12354SPA,KP15064SPA,KP18053ESPA,KP10771WPA
【产品】紧凑型无电感设计的离线式线性稳压器KP3310，5V/3.3V/2.7V输出电压
必易微电子推出的KP3310是一款紧凑型无电感设计的离线式线性稳压器，通过调整SEL管脚阻值，KP3310有5V/3.3V/2.7V三档输出电压可选，是一种简单可靠的获得偏置供电的离线式电源解决方案。
必易微LED芯片选型表
必易微提供以下技术参数LED产品的选型，MOS耐压：40V-600V，导通阻抗:0.25Ω-18Ω，工作模式：临界连续、开关、断续、Linear
|
产品型号
|
品类
|
Package
|
PF
|
MOSFET Rdson
|
MOSFET Vds
|
Isolated Non-Iso
|
Topology
|
OTP Internal
|
OVP Internal
|
OVP External
|
OCP
|
mini output voltage
|
Iout Vin=176-264Vac 72Vout
|
|
KP1054AVPA
|
LED芯片
|
SOP-4
|
0.5
|
18Ω
|
500V
|
Y
|
buck
|
Y
|
N
|
N
|
Y
|
15V
|
110mA
|
选型表 - 必易微 立即选型
必易微（KIWI）电源解决方案产品选型指南
目录- 高压非隔离产品 POE应用 反激产品 同步整流产品 PFC产品 LLC产品 电源方案介绍
型号- KP3282,KP40611W,KP3281,KP23130M,KP311BH,KP212,KP2264H,KP206D,KP81106A,KP30173M,KP2591A,KP206A,KP206B,KP36374,KP36373,KP2066,KP2064,KP8530X,KP41282,KP3210B,KP22066A,KP2182,KP2062,KP30172M,KP21822M,KP35052,KP36384,KP35053,KP22308,KP36383,KP36382,KP35051,KP22306,KP40511,KP40512,KP23132M,KP23132K,KP23162,KP2262H,KP23161,KP23160,KP1511,KP35026,KP23264M,KP41260,KP41140,KP41261,KP2806A,KP41141,KP41262,KP41142,KP201,KP30262,KP30264,KP206,KP35032,KP35033,KP30261,KP35031,KP22315A,KP40512M,KP40612,KP3126,KP21824M,KP21824L,KP40611,KP23267,KP23267M,KP21825C,KP4050,KP30181H,KP32652,KP30182H,KP32651,KP35001,KP36573,KP36572,KP40561P,KP22066,KP22064,KP41240,KP41361,KP3501A,KP41241,KP23151,KP22062,KP23150,KP22305L,KP30362,KP2315A,KP2206A,KP22305A,KP22035,KP22033,KP2813A,KP32511,KP40613QD,KP30183M,KP32512,KP36675,KP36674,KP35101,KP36673,KP22306A,KP21827M,KP23132,KP23131,KP23130,KP41340,KP30182M,KP30183H,KP30584,KP35111,KP3251A,KP23221,KP2201C,KP35200,KP8110X,KP22308B,KP3310,KP22308A,KP3311,KP15051,KP23111,KP23110,KP15052,KP32621,KP32622,KP1505A,KP2311A,KP2202A,KP81103,KP81102,KP81101,KP81106,KP41262C,KP2205,KP2206,KP2203,KP21827,KP21824,KP2201,KP2202,KP4060,KP41261C,KP23162M,KP40561,KP23162K,KP311A,KP311B,KP2822,KP3116,KP85631,KP3111,KP2264,KP35083,KP2261,KP40562,KP2262,KP35081,KP3114,KP35082,KP3112,KP40511P,KP201H,KP201F,KP201K,KP201A,KP31614,KP201E,KP22062A,KP201B,KP201C,KP2813,KP3221,KP2011,KP3224,KP3116H,KP3222,KP2012,KP2013,KP3211B,KP23152M,KP2806,KP321B,KP321AB,KP2803,KP30171,KP2801,KP35064,KP40661,KP35062,KP3113H,KP3212B,KP15113,KP15114,KP15111,KP22064A,KP3206,KP3205,KP3211H,KP2591,KP3114H
【应用】国产无电感ACDC KP3310可取代传统阻容降压方案，外围极简、输出稳定
将交流市电转换为低压直流的常规方法是采用变压器降压后再整流滤波，当受体积和成本等因素的限制时，最简单实用的方法就是采用阻容降压式电源。本文对比传统阻容降压与必易微电子KP3310方案做对比，分析用KP3310无电感ACDC方案去取代传统阻容降压方案的优势。
必易微（KIWI）LED驱动IC选型指南
目录- 非隔离和隔离产品 智能调光、可控硅调光产品 非隔离恒压和隔离恒压产品 DC-DC和电机产品 线性、去纹波产品 LED照明方案介绍
型号- KP18032,KP1271FNQ,KP13262,KP1078CL,KP13264,KP10790,KP10791,KP10792,KP1078CH,KP1313X,KP16014A,KP1325X,KP523302,KP2591A,KP1326A,KP1079A,KP523308,KP2182,KP1078DH,KP21822M,KP1402,KP85302,KP107W,KP119X,KP1076C,KP107L,KP1071CL,KP23132M,KP107Q,KP10780L,KP1078AH,KP1511,KP421X,KP523201A,KP35026,KP1078AL,KP1074,KP1073,KP1194,KP2816X,KP10781H,KP1076,KP1077A,KP2806A,KP512302,KP1601XA,KP1191,KP10781L,KP1072,KP13251,KP1193,KP1192,KP201,KP1078BL,KP13252,KP13255,KP13134,KP10780,KP13254,KP18026,KP10781,KP1078BH,KP13135,KP512308,KP30262,KP30264,KP28134A,KP30261,KP1184,KP22315A,KP23265C,KP1078A,KP1078B,KP4214,KP21824M,KP4213,KP21824L,KP23267,KP21825C,KP1074L,KP10750,KP1810X,KP10751,KP10752,KP1074Q,KP1075A,KP1075B,KP1075C,KP522201A,KP22066,KP22064,KP18001,KP3501A,KP22062,KP10760,KP10761,KP10762,KP1075Q,KP1326,KP28163,KP1325,KP28162,KP523208A,KP1075X,KP1274FQH,KP1274FQC,KP1273FC,KP1076A,KP12682F,KP1076B,KP107BQ,KP1274FC,KP22035,KP2801A,KP2813A,KP1274FH,KP18330,KP1505X,KP1274FN,KP12353,KP1274FQ,KP1072L,KP12354,KP1313,KP119,KP1072Q,KP1315,KP116,KP35101,KP118,KP22306A,KP107CQ,KP23132,KP23131,KP23130,KP123,KP18106,KP122,KP1073L,KP18108,KP1073Q,KP23223,KP23223M,KP1271FN,KP14633,KP14634,KP14631,KP1070L,KP14632,KP2201B,KP18002F,KP1070Q,KP1601A,KP1462X,KP12760F,KP521405,KP1273FQC,KP521403,KP107AL,KP3310,KP22308A,KP1255,KP522302E,KP15051,KP107AQ,KP14622H,KP15052,KP18320,KP1071L,KP1505A,KP1463X,KP123X,KP1071Q,KP81103,KP28123,KP28122,KP18001M,KP1271FC,KP1272FH,KP522208A,KP127XFQH,KP12551,KP1272FN,KP12554,KP127XFQC,KP2205,KP2206,KP2203,KP2322,KP2201,KP2202,KP1234,KP28162X,KP14622,KP14623,KP14501,KP1272FQH,KP1469,KP1255X,KP1272FQC,KP1272FC,KP1463,KP1221,KP1462,KP1220,KP52140X,KP1222,KP1806X,KP1182,KP1462XH,KP1511X,KP2822,KP12684FM,KP1059A,KP3111,KP1272FNQ,KP421,KP127XFQ,KP1162,KP1164,KP10780H,KP18053,KP1274F,KP18058,KP18055,KP2806,KP18059,KP127F,KP18001B,KP18001A,KP1271FQC,KP35064,KP35062,KP18061,KP18062,KP18069,KP1805X,KP18068,KP522308E,KP14624H,KP15113,KP15114,KP15111,KP3506X,KP1402A,KP12761F,KP2591,KP127FQ
电子商城
服务
可定制变压器电压最高4.5KV，高频30MHz；支持平面变压器、平板变压器、OBC变压器、DCDC变压器、PLC信号变压器、3D电源、电流变压器、反激变压器、直流直流变压器、车载充电器变压器、门极驱动变压器等产品定制。
最小起订量： 100000 提交需求>
可定制平板变压器、主变压器的开关频率2MHz以内、输入电压1400V以内、输出电压1400V以内，50%以上的产品采用自动化生产，最快3天提供样品、7天交货。
最小起订量： 3000 提交需求>
授权代理品牌：集成电路
授权代理品牌：分立元件
授权代理品牌：接插件及结构件
授权代理品牌：部件、组件及配件
授权代理品牌：电源及模块
授权代理品牌：电子材料
授权代理品牌：仪器仪表及测试配组件
授权代理品牌：电工工具及材料
授权代理品牌：机械电子元件
授权代理品牌：加工与定制
我要提问
登录 | 立即注册
提交评论