【经验】IGBT半桥驱动器SLM2184S驱动电压下降缓慢问题分析
数明半导体的SLM2184S是一款高压、高速的功率MOSFET和IGBT半桥驱动器，其工作电压高达600V，浮动沟道可用于驱动高侧配置的N沟道功率MOSFET或IGBT。SLM2184S典型应用图如下所示。
图1 SLM2184S典型应用图
在客户的三相电机应用中，客户的应用是利用SLM2184S驱动单相的两个MOS，同时设置过流、短路检测功能，当检测到绕组电流过大时，将通过关断/SD引脚来关断驱动，保证电机正常运行。在实际测试时，客户发现当/SD引脚关断时，MOS管的栅级电压下降缓慢，并在米勒电压附近发生振荡，造成MOS管不能正常关断。以下管为例，客户的部分测试原理图如下所示。
图2 下管的测试电路图
分析客户电路图和产品规格书，可以发现，客户在MOS的栅极和源极并联了一个电容，用于滤波，容值1μF，这无疑加大了MOS的Cgs。此外，由于SLM2184S在/SD引脚关断之后，HO和LO两个通道也随之关断，栅级电压下拉仅通过HO和LO内部的下拉电阻实现，出现类似“高阻”的情况，这与正常输出PWM信号时，利用MOS管快速下拉的情况不一致，这也是造成栅级电压下降缓慢的重要原因。因此，建议客户减小并联滤波电容的容值到10nF左右，另一方面，建议客户在驱动线路上做一个类似下图的钳位，来快速泄放栅级电荷。
图3 栅级钳位电路
利用/SD关断时的低电平信号和PNP管，构建类似于米勒钳位电路的栅级电荷快速泄放通道，可以有效提高MOS管的关断速度。客户在修改电路后重新测试，/SD引脚关断时，两路栅级电压均能正常的快速下降，达到客户预期。
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SERIES,BD33IA5WEFJ,BAJ2DD0,2SCR523EBTL□□□,DTB513ZM,RSDT27BM,SMLEN3WBC8W,BU33UV7NUX,BU97550KV-M,RF101LAM4S,BM2P121X-Z,LTR18EZPJ□□□□,TE3004-TP1W00A,LBP-602MK2,RB078BM30S,BD8961NV,BD67173NUX,MG7901WZ,DTD123EK,SCS304AM,BU7461S,SCT3060ALHR,RB088LAM150,RGW00TS65DHR,YQ20BM10SD,RQ6E045BN,RSS100N03,2SAR552P5,BU7462S,RD3L220SN,BD7J101EFJ-LB,1SS390SMFHT2R,DTD123EC,DAN235FM,RFN2LAM6S,SCS215AJHR,BD65496MUV,KA2002-B05B70A,2SC5824,BU52272NUZ,2SC4102U3,BD9B300MUV,RB558WM,DTC114GU3,SML-D12Y1W,BU33SD2MG-M,RBQ15BM45A,BU7464S,RV3C002UN,SML- EN SERIES,SCS304AG,SLI-570 SERIES,BU29TA2W,SCS304AJ,SML-S13MT,BM63374S-VA,BM63374S-VC,RFN2LAM4S,BR25HXXX-5AC系列,BD49EXXG-M,BDJ0GA3V,BD3575YFP-M,BDJ0GA3W,BM2P13B1J-Z,BU32TD3W,DTA124EUB,RB168MM150,BD18IA5VEFJ-M,RB461FM,BU33SA4WGWL,BV1HLC45EFJ-C,DTA124EU3,SIR-56ST3F,BU18JA2VG-C,BD37068FV-M,ML62Q1367□-NNNTBXXXX,RB162VAM-20,BU9794AKV,2SCR574D3,BU32TD2W,RGCL60TS60,BD9615MUV-LB,BM2P151X-Z,BD3814FV,LB-402MN,BD41041FJ-C,LB-402MD,2SC5866,BR25HXXX-5AC,BU52077GWZ,SLI-343V8R,SML-D13WW (A),BD9573MUF-M,RB088BM100,BD18336NUF-M,SLA580ENT,VS14VUA1LAM,DTC043ZUB,MR7930,BD6326ANUX,SH2104WN,RSX101MM-30,SCT3030KLHR,BU7487,BU7486,BU7485,BZX84BXXLY,BU7481,DTC144EE3,BD50GC0VEFJ-M,PMR18L,RD3R05BBH,DTC144ECA,MCR01,VS13VUA1LAM,MCR03,BD2200GUL,RS1E130GN,BD33GA5VEFJ-LB,BU7475,RQ6E030SP,BP3622,BD14210G-LA,BP3621,BSM180D12P3C007,BD63725BEFV,RBR5L40A,SML-Z14YT (A),BU7465,BU7464,BU7462,BU7461,RCJ700N20,VS24VUA1VWM,BD00HC5VEFJ-LB,BD9408FV,BD00HA3VEFJ-LB,RX3P10BBH,KDZV SERIES,RB168MM100,BD8314NUV,BD34700FV,BD9107FVM,BD5466GUL,RF4E080BN,DTC144VCA,DAP202FM,SML-Z14YT (C),BR25HXXX-2C系列,BA05CC0W,RF6G035BG,UT6KE5,SML-D13FW (C),BD60HC0VEFJ-M,BM2P134EF,BD00GA5VEFJ-M,BU1JTD3W,BD60GA5VEFJ-LB,BD52XXNVX-2C,SML-D15YW (C),BM2P137TKF,MMBZ27VCLY,BU90005GWZ,DTA123YM,RGWX5TS65D,LM358,ML62Q1714C,BD18HC5WEFJ-M,BD16950EFV-C,KD3004-TQFW00A,RBR2LAM40A,DTC114WUA,BD00EA5W,UT6KC5,BD18340FV-M,LM324,ML62Q1713C,MCR10,RQ3G110AT,MNR12,MNR15,MNR14,2SCR586J,MNR18,BM6242FS,BU28SA4WGWL,KA2003-B35N00A,BD15HA5WEFJ-M,MH2205WZ,RFS30TZ6S,LAP-601DB,LM339,BU7495,CSL1101WBDW,BD63536FJ,MNR02,QS6Z5,MNR04,STM 331U,BU1JTD2W,MCR18,RBR2L60B,DTA143EE3,R8009KNX,RBR2L60A,BRCH064GWZ-3,BSM600D12P3G001,BD8312HFN,SML-P14RW,RSX201VYM30,RQ5E070BN,RBR1LAM40A,BD82028FVJ,SCT4045DRHR,RB088BGE100,MMBZ5V6ALY,UT6KB5,BD9S231NUX-C,RGT8NS65D,RSJ151P10,BA25BC0W,DTA143EEB,ML610Q306,RGWS60TS65D,BM2P134QF,ML610Q305,ML610Q300,BD9P155MUF-C,LM393,BD4271EFJ-C,BD3020HFP,BD18398EUV-M,BD12KA5W,DTC013ZUB,
【选型】数明半导体线性照明/门极驱动/电机驱动/TEC控制器/DCDC/隔离驱动选型指南
目录- 线性照明 线性照明(续)/门极驱动/电机驱动/TEC控制器/DCDC/隔离驱动产品
型号- SLM561A45AE-7G,SLM201A30AA-7G,SLM201A75AA-7G,SLM501A45AA-7G,SLM401A60ED-7G,SLM2106BCA-13GTR,SLM421ACB-13GTR,SLM6260CB-13GTR,SLM501A120BA-7G,SLM7888CH,SLM401A35ED-7G,SLM2106SCA-13GTR,SLM8834FA-7G,SLM401A30ED-7G,SLM411AAC-7G,SLM401A50AA-7G,SLM561A30AE-7G,SLM501A40AA-7G,SLM211AAC-7G,SLM2103SCA-13GTR,SLM2136CF-DG,SLM8833EC,SLM2005SCA-13GTR,SLM401A15AA-7G,SLM201A35AA-7G,SLM27211CA-DG,SLM561A14AE-7G,SLM8835EG,SLM211CAC-7G,SLM501A55AA-7G,SLM2104SCA-13GTR,SLM21867CA-DG,SLM2003SCA-13GTR,SLM2181SCA-12GTR,SLM6240CB-13GTR,SLM401A20ED-7G,SLM510AAC-7G,SLM6160CB-13GTR,SLM201A20AA-7G,SLM401A25ED-7G,SLM501A75AA-7G,SLM201A15AA-7G,SLM201A45AA-7G,SLM561A15AE-7G,SLM401A25AA-7G,SLM501A50AA-7G,SLM341CK-DG,SLM501A100BA-7G,SLM401A60AA-7G,SLM1909MC,SLM411ACB-13GTR,SLM501A15AA-7G,SLM2186CA-DG,SLM401A55ED-7G,SLM501A20AA-7G,SLM345CK-DG,SLM201A25AA-7G,SLM401A30AA-7G,SLM561A50AE-7G,SLM201A50AA-7G,SLM561A20AE-7G,SLM201A55AA-7G,SLM2106SCJ-13GTR,SLM201A10AA-7G,SLM2004SCA-13GTR,SLM2184SCA-13GTR,SLM401A15ED-7G,SLM211ACB-13GTR,SLM501A25AA-7G,SLM501A90BA-7G,SLM561A25AE-7G,SLM8834EC,SLM401A50ED-7G,SLM501A60AA-7G,SLM2304SCA-13GTR,SLM201A40AA-7G,SLM401A20AA-7G,SLM7888MD,SLM401A45ED-7G,SLM8833FA-7G,SLM346CK-DG,SLM2101SCA-13GTR,SLM343CK-DG,SLM340CK-DG,SLM501A30AA-7G,SLM501A150BA-7G,SLM561A10AE-7G,SLM401A40AA-7G,SLM201A60AA-7G,SLM501A35AA-7G,SLM2110CG,SLM561A40AE-7G,SLM401A40ED-7G,SLM2001SCA-13GTR,SLM401A10ED-7G,SLM561A35AE-7G
【应用】国产高压600V三相全桥驱动IC SLM2136用于伺服电机器设计，内部集成三个独立半桥输出通道
在伺服驱动应用方面中，为了更好驱动电机正反转及相应的速度，驱动芯片是必不可少的，数明半导体三相全桥驱动IC SLM2136是一款600V高压、高速功率MOSFET和IGBT驱动器，具有三个独立的半桥输出通道，适用于三相电机驱动应用。
【应用】国产工作电压高达600V的门极驱动SLM21867CA-DG助力电机控制器设计，驱动电源范围7V~20V
随着我国各类驱动系统技术的逐渐发展，其核心部件-电机控制器此类产品中往往少不了核心驱动器件，用于驱动高侧配置的N沟道功率MOSFET或IGBT。本文主要介绍一款数明半导体的高压、高速功率MOSFET和IGBT驱动器SLM21867CA-DG应用于电控产品。
【产品】±5.0A峰值输出电流的驱动芯片HTD8325，包含三路半桥且可独立控制，导通电阻仅130mΩ
禾润电子推出的HTD8325是一款包含三路半桥且可独立控制的驱动芯片，用于驱动一个三相直流无刷电机，或驱动螺线管等其它负载。每路半桥高、低边均配置N通道功率MOSFET，可输出5.0A峰值电流。
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提供电机的输出反电势波形测试、驱动芯片输入/输出波形测试服务，帮助您根据具体应用场景来选择适合的电机驱动芯片型号，确保电机驱动芯片能够与其他系统组件协同工作达到最佳效果。支持到场/视频直播测试，资深专家全程指导。
实验室地址： 成都 提交需求>
可定制共模扼流圈、DIP功率扼流圈、大电流扼流圈、环形扼流圈/线圈等产品，耐温范围-40℃~125℃，电感量最高1200mH。
最小起订量： 1 提交需求>
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