【经验】圣邦微的过流保护芯片SGM2521输出异常分析说明

时间： 2021-09-22 来源：世强

技术问答

某客户设计一款中频按摩仪，因为输出电极需要按照客户需求加热输出不同的温度，在加热的过程中整个电路一直处于大电流状态，因此电路中应用了一颗OCP过流保护芯片 SGM2521，客户在测试开发板的时候发现，在设定固定的过流保护点之后，SGM2521的输出是方波，而不是设定的过流值。本文就SGM2521输出异常分析说明。

客户应用电路如下：

理论上按照客户设计的原理图,检测电阻为R33，95.3K，典型的限流值为0.943A，参考下图

客户在实际测试时通过加大负载，拉高电流，SGM2521并不是按照0.943A持续输出，而是输出方波，整个系统一直在不断的重启。

我们参阅规格书之后发现，SGM2521其实是有2种保护状态的，过流和短路，而且在2种状态下芯片的输出模式是不一样的。如果负载短路，芯片就会一直重启直到短路解除，这时表现的就是方波形式，如果过流，就会按照设定的电流阈值输出。

所以我们在应用时，一定要先确定保护模式，短路或者过流，这样才可以完全发挥SGM2521的功能，才能保证我们的系统正常运行。

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北京大烙铁 Lv3. 高级工程师 2023-10-13

说的是废话，明显还没明白就解答

没有更多评论了

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SGM DFAE Training Load Switch-OVP-Supervisor

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描述- 圣邦微SGMICRO与TI/ADI/MAXIM/LT/Onsemi/ST/Microchip/Nexperia/MPS/TOSHIBA/ROHM/RICHTEK/SILERGY/ABLIC/Renesas/Diodes/NXP/NJM/Infineon/Allegro 等品牌的信号链、电源芯对照表。

型号- SY8388,SN74HC541,A3981,IR44273,74AVC8T245Q,TS3A24159,TS3A24157,FAN3100,SLG88103,ADA4622-2,SLG88104,ADA4622-1,SGM2560,NA199,SGM2564,TSL6002,LMR23620,SGM48017C,LM431,FAN49103,MAX4282,SGM61220,BD9A201,74HC595,TLV3542,TLV3541,TS3A4751,TLV522,LMR23630,FAN53611,TC7SZ14FU,74LCX04,NCS21803,HCF4051,NCS21801,HCF4052,74LCX08,HCF4053,TSC214I,TLV3544,LMP2022,TSB611,NL27WZ04,SGM2588,FAN53601,SN74HC573,SN74HC574,INA333,TSU101,TSC213I,TSU102,NTMFS4C10N,UCC27531-Q1,TSU104,RT8293,74HC573,74HC574,SGM621,RT8290,SGM41600,TSB621,SGM620,SGM2572,SGM41603,SGM2571,SGM2576,SGM2575,SGM2578,SGM8T245S,RT8296,NL17SG07,SGM8557-1,TSU111,SGM8557-2,TSU112,ESD103-B1-02,INA321,TLV2242,TLV2241,SGM2205-12XK3G,ISL28118,OPA2277,BU30TD2,LM5109,BQ25619,SGM48013C,BQ25618,INA317,BQ25611,SGM62110,SGM62112,FSA4157,TPS76933,SGM2593,XB6091IS,BQ25601,TPS76950,BQ25600,SGM61230,TXS0104,TXS0102,SGM61232,SGM61234,TLV8801,TXS0101,SGM61233,74HC123,SGM5349-16,TLV62084,SGM431V,LTC2054,TPS51200,LTC2050,TLV8812,TLV8811,SGM61235,TLV8802,RT8253,BD9D323,BD9D322,AD5541,PMPB27EP,TPS54302,SGM4553YXET,LM7322,SGM8706,LM7321,SGM8707,SGM8701,MAX4664,LPV7215,SGM12UB1D2,AP2191,SGM3001,SGM42513,74LVC245A,SGM3005,TPS61099,SGM3002,SGM8276-2,TPS7A8300,SGMOP17C,TPS2553,ISL28130,TPS2556,TPS2557,SGM42403Q,SGM42553,BD6222,SGM8255B-2,ISL28134,74AHC1G08GV,TPS2551,74HC165,SGM62116,SGM62118,SGM62117,TPS3852-Q1,MAX4684,74HC164,AP2172,A3916,AP2171,TPS560430,A3918,BQ25638,SGM8709,U74LVC126,MP8676,SGM61280,MCP6V16,SGM42544,NCP718,LMX331,LMR36520,LM27761,TC7SZ32FU,SN74LVTH162373,ADM708,ADM707,SGM38042,SGM38046,TPS54340,MAX4230,TPS3823,LM2904,TC74VHC138,LM2902,LM2903,SGM8740,SGM2077A,SGM8742,SGM2077B,SGM8743,PESD5V0F1BSF,SGM41515A,MIC5209,LPV802,LPV801,SGM8748,SGM8749,NLAS44599,TPS54336,SGM40666A,SGM8746,TC74VCX16245,TPS54331,74LCX32,TPS54335,SGM41513D,SGM41513A,MCP6406,FTL75939,OPA548,SGM8957-1,MCP6402,SGM8957-2,TLV6208,SGM5223,MAX4232,TC74LCX16244,MAX4231,TPS3808,SN74LVC2T45,OPA2333P,MAX4236,SGM8551XN,TPS3840,TPS54320,SGM48018C,OPA990,RT4730,SGM41512A,SGM8745X,SN74AHC1,MAX9938,74LVTN16244,74LVTN16245,LPV821,SGM48019C,MCP6V52,MCP6V51,RT4723,OPA2210,TLV755P,SN74AC244,MCP6V54,AW2027,SGM8604-2XTDU8G,SGM8750,LPV812,LPV811,AD8534,SGM41283,SGM5353-16,AP2120,AD8539,AD8538,74LVC125,MCP6V69,74LVC126,SGM41285,DRV8313,MCP6V67,SN74LVC2G66,SGM7SZ244S,CAT4104,TS321,SGM8429C-4,AD5593R,SGM61430A,MP28373,MP5121,TMP108,74LVT16373,SGM8304,MAX40078,AD8541,74LVT16374,MCP6442,TMP103,TMP102,MP9943,MP9942,AP2112,MCP6V79,NCV890100,SGM13003A,MCP6V76,STSPIN250,MCP6V77,74LVTH125,SGM8770,AP2114,SGM38042B-1,LM2841,AD8513,AD621,AD620,NCS20034,SGM65230,NCS20032,AD623,AD8515,SGM65231,AD627,TC7SPN334,SGM13002A,SGM8477-1,SGM2035C,SGM41291,SGM2036S,MCP6V96,TUSB320,74LVC138,SGM7SZ245S,SGM8958-2,SGM41296,SN74CBT3245,MP9928,SGM41298,SGM8958-1,SGM6132,MAX4736,SGM6130,AD8532,AD8531,MAX4730,TPS3422,SGM833A,MCP6472,SGM833B,TLV1702,SGM7SZ32,SQ27403,MC74LVC74,TPS3420,TPS3421,TP2011,SGM2037H,MUX36S08,BISS0002,MC74AHC08,74LVC373A,TPS2595XXDSG,MCP6001,TPS3895,AD8502,TPS3896,TPS3897,AD8500,MCP6002,TPS3898,AP2151,SGM41282C,TPS3899,AD8506,AD8505,TLV7021,SGM832A,TP2025,MC33074,TP2021,MCP6004,MCP6006,LT7183,74LVC374A,AP2141,SN74LVC2G04,MCP6492,74LVC1G126,74LVC1G125,SGM48535B,SGM7SZ14,SGM48535A,SGM48752X,TPS2596,BU28TD2WNVX,AS179,XC6201,SGM15CB1A4,XC6206,TC7WZ04,SN74LVC2G14,MCP6022,SGM2210P,SGM7SZ08,MCP6024,SGM834A,SN74LVC2G17,MCP6021,SGM834B,SGM7SZ04,MP2497,SGM7SZ00,IRL44273LPBF,SGM48753X,SGM48754X,AD5592R,TLV61046A,TPS7A8400,SGM48753,SY8301,SGM48754,SQ24335,SGM2211S,SGM48757,ISL21080,SGM48759,SY8303,MCP6032,MCP6031,SGM48751,SGM48752,SGMNQ07430,SGM61720,TSV911,TSV912,TSV914,SN74AVC16T245,MP2490,SGM05UB1B3,LPV324,OPA4379,OPA4374,HD3SS3412,MCP6044,OPA4376,OPA2192,MCP6041,74VHC244,LMR16030,74AHCT595,APD7118,OPA2197,TPS62730,MCP6042,OPA2196,SN74AVC8T245,SN74LVC157,OPA2191,ADG509,ADG508,SGM8478-1C,FSA2457,TMUX415,TC7SZ00,LM1117,AD8599,TPS62743,TSV6192,SN74LVC125,SGM706S,SN74LVC126,RT6160,TPS76901,TC7SZ07,SGM2564A,TLV707P,NTMFS4C06N,MP2451,TS393,LMH6643,TC74VCX164245,SN74LVC138,SGM48760,SGM25662,MIC708,MCP6061,MP2460,LME49726,RT6150,MIC706,SN74AHCT86,MCP6074,TC7SH125F,STSPIN220,APD196,SGMOP07,74HC541,TC7SET08,LMC7211,BQ25890H,MAX706,MAX9119,MAX708,MCP6071,SGM2566C,74AHC573D,TC7SZ32,BU33TD2,74LVC157,YDA145,BD9G341,SGM2567S,NJMOP2277,INA828,LPV358,NCP382,NE5532,SGM2217Q,LMG1025-Q1,NCV6324,SGMNQ40430,NCV6334,SGM48536BQ,SGM21102G,74AHCT86,BGA524N6,SGM21102C,FSA2466,SGM21102B,INA818,SGM21102A,SGM05FB1E2,SN74AHC244,TLV74118,TC7SZ32F,NC7WZ04,74AVC8T245BQ,TSV991,TSV992,TSV994,SGM3851A,SGM48536CQ,TC913,74AHC244,AD8571,74AVC2T45,SGM2521A,TLV74128,SN74LVC541,AZ1117,LMV881,BU28TD2,MAX14589,TLV2316,SGM61330,SGM724,TS5V330,SGM5209-14,74LV541A,SGM3758,NJU7076,MAX4163,MAX4162,PESD15VW1BCSF,TLV74133,TPS25921A,OP213,TLV74130,SGM722,TLV2333,SGM723,SGM721,SGM8610-2,NLAS3899,OPA2140,EL5420,MAX4174,MAX4173,SGM15UB1E2,TC7SH126FU,SGM41100A,SGM61310,SKY13351,A4980,SGM41100V,SGM61306,SGM61305,SGM61308,SGM61307,SGM8262-2,TC7PZ14,SGM3795,74LCX126,74LCX125,74LVC541A,SGM3799,SA4159

对照表 - SGMICRO

SGMicro（圣邦微） SGM2521/ SGM2522 电流限制开关官方数据手册

描述- SGM2521/SGM2522 Programmable Current Limit Switches.

型号- SGM2522YS8G/TR,SGM2522YTDC8G/TR,SGM2522YS8,SGM2521YS8,SGM2521,SGM2521YTDC8G/TR,SGM2522,SGM2521YS8G/TR

数据手册 - SGMICRO - 2017年9月7日 PDF 英文下载

【应用】输入电压3.9~13.5V的锂电池充电芯片SGM41513用于智能网关，具有过压过流保护

客户在智能网关方案中想选用一款4.2V左右的锂电池充电芯片，目的是当网关处于断电情况下，内部依旧可以实现供电，并且具备实时充电放电功能，本文推荐圣邦微（SGMICRO）的这款SGM41513，满足客户需求。

应用方案发布时间 : 2022-04-17

SGM2521/SGM2521A SGM2522/SGM2522A Programmable Current Limit Switches

型号- SGM2522YS8G/TR,SGM2522AYS8G/TR,SGM2522YTDC8G/TR,SGM2522AYTDC8G/TR,SGM2521AYS8G/TR,SGM2521AYTDC8G/TR,SGM2521,SGM2521YTDC8G/TR,SGM2521A,SGM2522,SGM2521YS8G/TR,SGM2522A

数据手册 - SGMICRO - REV. B. 1 - AUGUST 2024 PDF 英文下载查看更多版本

【IC】具有模拟电流检测功能的双通道车规级高压侧驱动器SGM42203Q，操作电压4.5到36V

SGMICRO SGM42203Q是一款汽车Q1级，操作电压4.5V到36V，60V（ABS），80mΩ电流可设双通道高边驱动器。芯片过流门限值可通过CL引脚编程：2.5A、5A、10A、15A和22A；支持高达260mJ感性负载钳位能量；当VCC出现低能量尖峰，内部VCC电压钳位会保护器件；器件集成精确的比例电流检测功能，用于通过电流检测引脚的输出来检测负载电流。

产品发布时间 : 2024-07-27

SGM2521YTDC8G/TR PcbLib & SchLib & IntLib

型号- SGM2521YTDC8G/TR

CAD模型库 - SGMICRO - 2024/3/21 RAR 英文下载

SGMICRO负载开关选型表

24V、5.5V负载开关，最大负载电流6A，限流值可调，多种小封装。防反向电压，70热插拔芯片。

产品型号	品类	Vcc (Min)(V)	Vcc (Max)(V)	Iq (μA)	Continuous Output Current (mA)	Current Limit(mA)	Soft-Start	Package
SGM2521	Load Switch	4.5	24	170	2000	Programmable (260~2000)	Soft-Start	SOIC-8 TDFN-2×3-8BL