【应用】SGMICRO 小封装过压保护芯片SGM40661在低功耗蓝牙5.0耳机中的应用

时间： 2019-01-02 来源：SGMICRO

技术问答

低功耗蓝牙5.0耳机采用Renesas的低功耗环境光和接近传感器 ISL29044A，Silicon Labs的8位MCU EFM8SB10电容感测功能，圣邦微的充电过压保护芯片 SGM40661，Ricoh的小封装LDO RP110L301D，ROHM的三轴加速度传感器 KX122-1037等器件组成，实现了监测蓝牙耳机是否佩戴，感测手势、自由下落、设备的姿态等功能，实现了无线蓝牙耳机的便携性和智能性。下面是原理框图：

蓝牙耳机的可充电电池需要过压保护，而且对芯片体积有严格要求，在这个应用中选用圣邦微的过压保护芯片SGM40661，封装尺寸只有1.3mm*0.94mm适合小型化耳机设计。输入电压2.5V到28V，可抵抗 4A 电流，集成27mΩ (TYP) N通道MOSFET，快速过压保护关断反应时间80ns，针对充电异常电压及时对锂电池进行保护。过压保护阀值可调范围4V到20V,具有短路和热关断保护，对锂电池充电进行充分保护，防止锂电池损坏。

下面是SGM40661过压保护芯片的典型应用电路：

在输入端推荐CIN 为0.1uF陶瓷电容，并尽量靠近芯片的输入管脚，电容选择要求额定电压最少高于5V，理想的是50V额定电压。为了确保电流限制激活时的稳定性，输出端需要约1μF的小输出电容。输出电容器无特殊的电容ESR要求。如果需要，可以增加以适应任何负载瞬态条件。通过在OVLO管脚上从IN到GND设置电阻分压器，IN的过电压保护点可以在4V到20V之间调节。

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目录- 耐高压LDO IC和LDO IC 带使能LDO IC 可调输出LDO IC 三端稳压IC DC-DC 升压/反压IC DC-DC降压/变换IC 低电压检测IC(复位IC) 看门狗电源监测IC 单节锂电线性充电IC/太阳能供电的单节充电IC 电池充电IC 锂电保护IC 电压基准源IC 运放/比较器IC 恒压恒流控制IC 逻辑电路IC 模拟开关IC PWM控制IC I2C实时时钟/日历IC RS232接口IC LED驱动IC 单通道直流有刷马达正反转驱动IC 7/8路达林顿驱动IC 全极性/单极性低功耗霍尔IC

型号- HM7533HMR,HM5450BPR,HM5054B,HM1509HV-3.3,HM5208系列,HM5633BPR,HM7818M5,HM74HC 系列,HM117系列,HM4115MR,HM5501,TL494,HM6216A25PR,HM6234B09M5,HM7345HBPR,HM61N11MR,HM6226P50MR,HM1084T50/TO-252,HM7850PR,HM7818MR,DW03系列,HM2676系列,HM7328HBM5,HM74HC,HM5501DR,HM61C50MR,HM5501系列,HM1156B28DR,HM61N22MR,HM61N45MR,HM5054B系列,HM116A,HM6214系列,HM7328HBMR,HM56XXB系列,HM4057系列,HM432系列,HM7345HBMR,HM73XXN,HM7530HBMR,HM1156B15DR,HM5055DR,HM2940T50,HM4310,HM118系列,HM4115B/ESOP8,HM4313,HM6382P50PR,HM5056R,HM7533MR,HM1235B33PR,HM6235P28MR,HM61N33MR,HM4057D8,HM7336HBM5,HM61N10MR,HM4051A,HM61C09MR,LM393系列,HM6226系列,HM6214P18MR,HM8563S,HM6214P50PR,HM6234B09MR,HM5450BMR,LM2596HVT-12V,HM7828M5,HM6206P18PR,HM7330HBPR,HM6206P28MR,HM1156,HM5511,HM61N44MR,HM61N21MR,HM73XXHB系列,HM6226P30PR,HM4057DR,HM8563M,HM7336HBMR,HM1084T50/TO-220,HM431系列,HM4056系列,HM75XXH,HM62783A,LMV321,HM6234B09PR,HM1558系列,HM61C40MR,HM7850M5,HM1234B28MR,HM5511系列,HM6226P18MR,HM2676HV-12V,HM7542HPR,HM61N36MR,HM75XXHB,HM1235B30DR,HM78LXX,HM117D,HM6206系列,HM317K/1.5A/TO-252,HM7328HBPR,HM4275系列,LM358,HM7530HBPR,HM5430BM5,HM5056ES,HM7518HPR,HM5055系列,HM3232,LM358-18V,HM7840PR,HM6226P50PR,HM7850MR,HM62784A,HM4054E,HM8805,HM61N24MR,LM321,HM6216系列,LM324,HM6214P28MR,HM6214P18PR,HM6234B18MR,HM7660系列,HM7530HPR,HM5418BMR,HM9921,HM1084,HM5633BMR,HM9922,HM9923,HM7550T,LM2596HVS-12V,HM4115,HM6206P18MR,HM5208,HM61N12MR,HM4055H,HM61N35MR,HM78MXX,HM465系列,HM6206P50PR,HM992X系列,HM1235B33M5,HM1156B25DR,HM6234B18M5,HM7333N,HM61C30MR,LM339,HM73XX系列,HM6382B36M5,HM1156B18MR,HM5056系列,AMS1117,HM5431,HM9910,HM5418BM5,HM5430,HM5633BM5,HM6216A25MR,HM5056D8,HM74HC595D,AMS1117T18PR,HM4056E,ULN2004A系列,HM1235B25M5,HM7315HBMR,HM4054系列,HM6219系列,HM6219B28MR,HM809,HM2676HV-5.0,HM2675HV,HM6235P30PR,HM75XX系列,HM5056R系列,HM7320HBPR,LMV358,HM61C42MR,HM4056HA,HM78MXX系列,HM4056HA系列,HM74HC245T,HM1232系列,HM61N30MR,JRC4558,HM5155系列,HM317D/1.0A,HM7315HBM5,HM7340HBPR,HM6208系列,HM6214P15MR,HM6214P28PR,HM7350NPR,HM6206P15PR,HM6206P25MR,HM5056RD8,HM2940系列,HM7840M5,HM6226P28MR,HM6382P27PR,HM6226P18PR,LM393,LM2576HVS-12V,HM61C20MR,L9110系列,HM6206P25PR,HM6206P12MR,HM5501MR,HM74HC138D,HM1156系列,HM1156B30MR,HM7830PR,AMS1117T18B,HM7840MR,LM2596系列,LM2576系列,HM61N40MR,HM1235B12M5,LM258,HM6234B10PR,HM5636BPR,HM6245P30PR,HM6216A30MR,HM1509HV-12V,HM1084TA/TO-263,HM1558,HM6382P28PR,LM339系列,HM7340HBMR,HM809R,HM809S,HM6234B30MR,HM78LXX系列,HM2676HV-3.3,HM4057D系列,HM61C21MR,HM5450BM5,HM6214P25MR,HM809T,HM6214P15PR,HM4051AD,HM2675HV系列,HM61N系列,HM6206P15MR,HM7820MR,HM6206P28PR,HM7833PR,HM1156B18DR,HM6216A33MR,HM7350N,HM61C44MR,HM2676,HM6382P27MR,HM6234B30M5,HM7340HBM5,HM1235B15M5,HM7315HBPR,HM61C33MR,HM61C10MR,HM7320HBMR,HM78L05,HM4115B系列,HM7320HBM5,HM6245P33PR,HM5431系列,HM317D/1.5A,HM61N20MR,HM4056HA/SOT-,HM3232系列,HM61C22MR,L9110,HM6382系列,HM6216A33PR,HM1509E-5.0,HM1509-ADJ,HM5636BMR,HM5636BM5,HM116系列,HM61N,LM2576HVT-12V,HM7830M5,HM6234B30PR,HM61C45MR,HM61C,HM6226P15MR,HM6226P28PR,HM7336HBPR,HM6382P28MR,LM2596S-12V,DW03/SOT-25,JRC4558系列,HM61C11MR,HM78M05,HM6214P12MR,HM1235B33DR,HM6235P30MR,HM4056HA（单灯闪烁）,HM7533HPR,HM75XXH系列,HM7830MR,HM1232,HM5430系列,HM1234,DW03,JRC4580,MC34063系列,HM809系列,HM1235,HM61N42MR,HM1509E-ADJ,HM7820PR,HM29151,HM29152,LM2596S-ADJ,HM4115B,HM5430D4,HM1235B25DR,HM6234B36MR,HM7822MR,HM7845MR,HM7833M5,HM7333HBMR,AMS1117T12B,HM7330PR,LMV321系列,LM258系列,HM7325HBMR,HM6226P12MR,HM6234B15PR,LM2576HVS-3.3,HM61C35MR,HM61C12MR,HM4313系列,HM54XXB系列,HM6234B36M5,HM4056HA/SOT-25,HM29151系列,HM6234B25MR,HM7333HBM5,HM5055,HM5056,AMS1117T25B,HM56XXB,HM7833MR,HM6382P33MR,HM61C系列,LM2596S-5.0,HM3232T,HM1509-5.0,ULN2803A系列,HM6234B12MR,HM5433BM5,HM1156B30DR,HM6234B25PR,HM317/1.5A/SOT-223,HM1084T33/TO-263,HM61C24MR,HM7318HBPR,HM7550HMR,HM1234B30MR,HM1235B28M5,HM8541系列,HM6235P33PR,AMS1117TAB,HM6214P12PR,HM6214P33MR,HM73XX,HM61N18MR,DW03/SOT23-3L,HM1235系列,ULN2804A系列,HM9910系列,HM1084T33/TO-252,HM61C36MR,HM5433BMR,HM1156B12MR,HM5650BPR,HM6206P33PR,HM1235B12DR,HM317,HM6206P20MR,HM7822PR,ULN2803A,HM432,HM7845PR,HM6382B30M5,HM7820M5,HM431,HM6219B40MR,LM321系列,HM6226P25MR,HM7325HBM5,HM6226P15PR,HM6226P33MR,HM1509,HM61C25MR,LM358系列,HM7550HBPR,LM2596HVT-5.0,HM4051AD系列,HM6216A30PR,HM8563系列,HM5650BMR,HM7350NMR,ULN2804A,HM1084TA/TO-252,HM6382P36PR,HM1234系列,HM78XX系列,AMS1117系列,HM5052MR,HM6226P12PR,HM6234B36PR,HM1084系列,LM324系列,HM7350PR,HM7350HBMR,HM1235B15DR,HM7825PR,HM29152S,HM29151S-5.0V,HM6235P25PR,LM2576HVT-3.3,HM5511B,HM61N09MR,HM116MR,HM2940,LM2596S-3.3,HM1509-3.3,HM4070D8,HM74HC04D,HM6234B33MR,HM6234B10MR,HM3171.0A/SOT-223,HM61N50MR,HM5433BPR,HM29151T-3.3V,DW03D,HM2675HVT,HM4070系列,HM2675HVS,HM7350HBPR,JRC4580系列,HM4115系列,HM1084TA/TO-220,HM6206P33MR,HM7333HBPR,HM462,HM7333HMR,HM29151S-3.3V,HM465,HM7836PR,HM2676HV-ADJ,HM8805系列,HM7533HBMR,HM6234B10M5,HM7550HBMR,HM5650BM5,HM61C15MR,HM6234B12PR,LM2596HVS-ADJ,HM4070DR,HM1156B33MR,HM117,HM118,HM6206P15VR,HM6206P45MR,HM317系列,HM116,HM1235B18M5,HM1509系列,LMV358系列,HM6206P12PR,HM6234B33M5,HM7845M5,HM7822M5,HM232,HM7350MR,HM4057HDR,AMS1117T15B,HM4057H系列,HM6382P36MR,HM7533HBPR,HM1156B28MR,HM61C27MR,HM4275S,HM6234B28M5,HM7518HMR,HM5630BPR,HM6214P30MR,HM11

选型指南 - 虹茂半导体 - 2023/1/13 PDF 中文下载

【经验】过压过流保护芯片SGM2526输出电压振荡现象的原因和解决办法

SGM2526是圣邦微电子生产的一颗过压过流保护芯片，主要用于系统电源输入的地方对负载进行过流过压的限制和保护，最大电流可达5A，适用的电压是5V或者12V。实际使用中发现，当SGM2526的输入电源上升时间比较缓慢时，输出电压会出现振荡现象，影响后面的电路工作，这里就该问题进行了分析，并给出了解决办法。

设计经验发布时间 : 2020-08-13

Helisson UN-07智能扫描词典笔主板上采用钰泰ETA7014过压保护IC，最高耐压36V

我爱音频网拆解了Helisson UN-07智能扫描词典笔，其中，主板上采用了ETA钰泰ETA7014过压保护IC，保护点可调节，最高耐压36V，内阻35mΩ，支持过热保护，用于输入过压防护。

应用方案发布时间 : 2024-10-27

LDO选型：业界超低静态功耗1μA，低功耗低噪声圣邦微LDO

圣邦微LDO高精度低功耗低噪声、品质卓越、同比市场同类产品便宜50%，年出货量超过十亿。SGMICRO圣邦微LDO，是业界最低功耗LDO，低噪声LDO。世强是圣邦微代理商，官方授权供应圣邦微低功耗低噪声LDO及相关圣邦微低功耗低噪声LDO的选型资料等。

原厂动态发布时间 : 2018-07-06

【产品】圣邦微双路型LDO SGM2027，单颗LDO完成两路LDO的电压转换

在一个模块电路中，前端DCDC输出的电压通常为5V，后级就需要LDO来完成5V至3.3V，3.3V至1.8V的转换。如果有多个低压需求，那么就需要使用多颗LDO，而现在单颗MCU体积都做的很小了，如果一个主控就配一个LDO，就会大大增加电路的体积。这里介绍一款圣邦微的双路型LDO SGM2027，单颗IC完成两路LDO的电压转换。

新产品发布时间 : 2019-06-01

Pamu Z1 Pro真无线降噪耳机，采用ETA9697电源管理芯片及ETA7014过压保护芯片

Pamu Z1 Pro真无线降噪耳机是Pamu系列近期推出的新品，我爱音频网对其进行了拆解分析，其中，有线充电采用了钰泰半导体ETA9697电源管理芯片，集成了16V耐压的线性充电器和5V同步升压变换器，负责充电盒内置电池的充放电管理。此外，还采用了钰泰ETA7014高侧过压保护芯片，保护点可调节，最高耐压36V，内阻35mΩ，支持过热保护，用于输入过压防护。

应用方案发布时间 : 2024-10-26