【选型】国产全差分音频功率放大器SGM4996YMS8G/TR用于车载T-BOX，THD+N低至0.013%

时间： 2022-12-21 来源：世强

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在这个万物互联的时代，汽车也加入了我们的互联网家族。车联网系统主要由主机、车载T-BOX、手机APP和后台系统四大部分组成。其中车载T-BOX主要用于与后台系统、手机APP通信，从而实现手机APP的车辆状态信息显示与控制。

车载T-BOX作为车联网系统的重要组成部分，能为车辆提供远程通信接口，可以远程监管和操作车辆。其硬件设计架构主要由主控、显示模块、电源管理单元、音频单元、4G模组、定位模块、传感器单元等组成。今天我们主要讲讲T-BOX的音频单元部分，给大家推荐一款圣邦微的音频功率放大器 SGM4996YMS8G/TR，可在2.5V至5.5V电源范围内工作，THD+N低至0.013%。图1表格为SGM4996YMS8G/TR相关参数展示，可供参考。

图1.SGM4996YMS8G/TR相关性能参数

SGM4996YMS8G/TR选型优势体现于：

（1）宽工作电源电压范围，2.5V至5.5V，适合多种应用场景。

（2）高PSRR，根据不同的VCC电压，PSRR值范围从-54~-85dB。PSRR 越高,输出信号受到电源的影响越小。

（3）低THD+N （总谐波失真加噪声），仅为0.013%。该参数是表示失真+噪声，是音频功率放大器的一个主要性能指标，值越小越好。

（4）低关断电流，仅为0.01μA。关断电流其实是指设备处于关闭状态，但系统仍与电池相连的情况下所消耗的电流，这个值越小越好。

（5）拥有低功耗关机模式和热关机保护。关机功能可通过逻辑高电平或低电平实现，取决于作用在SD模式引脚上的电压。

（6）宽工作温度范围-40℃至+85℃，可以应对不同环境使用。

图2. SGM4996YMS8G/TR封装及引脚定义

SGM4996YMS8G/TR采用MSOP-8封装（如图2所示），体积小巧，方便产品设计。外围设计简单，不需要自举电容器或输出耦合电容器，节约成本。

综上所述，SGM4996YMS8G/TR拥有的宽电源电压范围、低THD+N、高PSRR、低关断电流等优异性能，都非常适合应用在车载T-BOX产品，助力开发商们提升产品性能，赢得市场竞争力。

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SGMICRO（圣邦微）信号链和电源管理芯片选型指南

描述- SGMICRO specializes in high-performance and high-quality analog and mixed-signal integrated circuits, and is committed to building a comprehensive portfolio of the highest quality analog and mixed-signal integrated circuits to address all customer needs.

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

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SGMICRO（圣邦微）信号链和电源管理芯片选型指南

目录- Company Profile Amplifiers Comparators Data Converters Voltage References Audio/Video Drivers Analog Switches Logic Ics Temperature Sensors RF Switches Supervisory Circuits LDOs System Power Management Ics Battery Management Ics LED Drivers LCD & OLED Display Powers and Drivers Switch Mode Power Ics Application-Specific Auxiliary Powers Motor/Gate Driver Index

型号- SGM61450,SGM3733B,SGM2558A,SGM5347-12,SGM2558B,SGM8261-5,SGM2564,SGM8261-1,SGM5347-10,SGM8261-2,SGM2549,SGM48017C,SGM72110,SGM8094,SGM836,SGM8091,SGM837,SGM61220,SGM8092,SGM8093,SGM835,SGM72108,SGM2553,SGM72106,SGM2555,SGM809B,SGM4519,SGM4517,SGM48018,SGM4518,SGM48010,SGM63600,SGM4520,SGM4521,SGM48005,SGM8417-4,SGM8417-2,SGM4051C,SGM48000,SGM48001,SGM48002,SGM3843A,SGM61433,SGM84782,SGM621,SGM58031,SGM620,SGM41600,SGM2572,SGM41603,SGM2571,SGM2574,SGM51622H,SGM4995,SGM4511,SGM4996,SGM4512,SGM2576,SGM2575,SGM4510,SGM2578,SGM4515,SGM4516,SGM8250-1,SGM8250-2,SGM4514,SGM3209,SGM809,SGM8557-3,SGM8557-1,SGM8557-2,SGM803,SGM61012,SGM804,SGM802,SGM61013,SGM810,SGM811,SGM4782,SGM7237B,SGM8902,SGM8903,SGM8904,SGM4542,SGM8905,SGM4548,SGM4549,SGM3699,SGM4546,SGM4547,SGM48013C,SGM62110,SGM61020,SGM62112,AAP6153A,SGM61022,SGM62111,SGM800,SGM2553/D,SGM2596,SGM3200,SGM3206,SGM8270-2,SGM3207,SGM4535,SGM3204,SGM8270-4,SGM8T245,SGM829,SGM61230,SGM42512,SGM41664,SGM825,SGM823,SGM61234,SGM824,SGM891B,SGM832,SGM42507,SGM42506,SGM830,SGM831,SGM4563,SGM40567,SGM4560,SGM42505,SGM4561,SGM6503,SGM4566,SGM6502,SGM8925,SGM6501,SGM8926,SGM4564,SGM8927,SGM5349-16,SGM6505,SGM4568,SGM6504,SGM8909,SGM890B,SGM816,SGM42501,SGM40565,SGM42500,SGM814,SGM815,SGM812,SGM40560,SGM40561,SGM821,SGM822,SGM820,SGM4551,SGM4552,SGM4550,SGM4555,SGM4556,SGM4553,SGM4554,FT2910,SGM8910,SGM5347-8,SGM4558,SGM11124F,74LVC2T45,SGM893B,SGM4581,SGM8941,SGM4582,SGM4583,SGM8704,SGM4588,SGM8705,SGM4589,SGM8706,SGM8707,SGM8942,SGM8701,SGM8702,SGM8703,SGM12213A,SGM892B,SGM6510,SGM8276-4,SGM4573,SGM3001,SGM4574,SGM42513,SGM6514,SGM6513,SGM3005,SGM4578,SGM6512,SGM8276-2,SGM3002,SGM42622B,SGM6511,SGM8276-1,SGM3003,SGM4576,SGMOP17C,SGM6518,SGM8931,SGM8932,SGM6516,SGM12214A,SGM8933,SGM6515,SGM8934,74AVC8T245,SGM3141B,SGM42553,SGM61031,SGM62116,SGM62115,SGM8953-1,SGM62118,SGM8953-2,SGM62117,SGM8708,SGM8709,SGM4075-2,SGM3140B,SGM4075-1,SGM42544,SGM7300A,SGM7300B,SGM42541,SGM42540,SGM8951,SGM8710,SGM8952,SGM5200,SGM38045,SGM38042,SGM6533,SGM8711,SGM8712,SGM8955,SGM38046,SGM8956,SGM8199L2,LM2904,SGM8199L1,SGM41002,SGM8968-4,SGM8968-2,LM2902,SGM8968-1,SGM8740,SGM8741,SGM8742,SGM8743,SGM8263-1,SGM8748,SGM8263-2,SGM8417-1,SGM8749,SGM8744,SGM40666B,SGM8745,SGM40666A,SGM8746,SGM8747,SGM41513D,SGM41513A,SGM42561,SGM42560,SGM8957-1,SGM8957-2,SGM42562,SGM5208-14,SGM5223,SGM48018C,SGM11102F,SGM41512A,SGM37603A,SGM8521,SGM8522,SGM5018,74LVTN16244,74LVTN16245,SGM8524,SGM8604-1,SGM11103F,SGM8193A3,SGM8604-5,SGM8193A2,SGM8604-2,SGM48019C,SGM8193A1,SGM8604-3,SGM8193A0,SGM37604A,SGM8751,SGM41007,SGM41008,SGM6332,SGM8750,SGM41280,SGM41281,SGM41283,SGM5353-16,SGM37891A,SGM41285,SGM41286,SGM8542,SGM51652H8,SGM8301,SGM8543,SGM8302,SGM8544,SGM8545,SGM51652H4,SGM8541,SGM8429C-4,SGM8304,SGM37892A,SGM8531,SGM8773,SGM8532,SGM8774,SGM8534,74LVTH125,SGM8770,SGM8771,SGM8772,SGM8535,SGM8536,SGM8537,SGM8538,SGM65230,74LVC2G04,SGM37893A,SGM65231,74LVC2G08,SGM65232,SGM8969-2,SGM8969-1,SGM2035C,SGM7232,SGM9128YP,SGM41291,SGM2036S,74LVC1G32Q,74LVC2G14,SGM13001C,SGM13001B,SGM2581E,74LVC138,SGM8958-2,SGM41295,SGM13001A,SGM8958-1,SGM7222,SGM6132,SGM8554,SGM7223,SGM8555,SGM7224,SGM6130,SGM8556,SGM2581C,SGM7220,SGM2581A,SGM8551,SGM8552,SGM7226,SGM7227,SGM7228,SGM7229,SGM44599,SGM8581,SGM7SZ32,SGM8713A-1,SGM8582,SGM6613A,SGM8584,SGM41282C,SGM8714B-1,SGM8924A,SGM58XXX,SGM5355-16,SGM7SZ19,74LVC1G125,SGM89000,SGM811B,SGM7SZ14,SGM48752X,SGM431VB,SGM2560A,SGM37603,SGM2560B,SGM6611C,SGM810B,SGM7SZ08,SGM7SZ04,SGM8591,SGM7SZ00,SGM8592,SGM9203,SGM6612A,SGM8594,SGM8922A,SGM4T245,SGM48753,SGM48754,SGM48755,SGM48756,SGM48757,SGM813B,SGM48759,74AVC4T245,SGM8140,SGM8141,SGM48751,SGM449,SGMNQ07430,SGM48752,SGM48510,SGM458,SGM3785S,SGM459,SGM457,SGM8142,SGM452,SGM450,SGM451,SGM37862,SGM37861,SGM812B,74GTL2005,SGM447,SGM448,SGM446,SGM7SZ244,SGM8478-1C,SGM7SZ245,SGM8139,SGM48537,SGM48538,SGM48539,SGM5351-16,SGM2588G,74LVCN16373,SGM2588E,SGM61032A,SGM2588K,SGM61032B,SGM2588I,SGM3712,SGM2588C,SGM3713,SGM3710,SGM2588A,SGM3711,SGM48523,SGM48524,SGM48525,SGM48526,SGM48760,SGM48520,SGM8557-5,SGM71XX,SGM706B,SGM3700,SGM3727,SGM3741B,SGM3725,SGM3726,SGMOP07,SGM898,SGM899,SGM896,SGM897,SGM895,SGM61030A,SGM61030B,SGM2566B,SGM4823,SGM3735,SGM3732,SGM2566A,SGM4822,SGM3716,SGM3740B,SGM4806,SGM3717,SGM3714,SGM3715,SGM4809,SGM4807,SGM3718,SGM4808,SGM3719,74LVC157,SGM48780,SGM48540,SGM37898,SGM51652H,SGM3720,SGM37891,SGM4812,SGM37892,SGM2567A,SGM4810,SGM37895,SGM3749,SGM3747,SGM3748,74LVTH16244,SGM72204A,SGMNQ40430,SGM432,74AHCT86,SGM431,SGM3752,SGM3753,SGM3750,SGM3756,SGM3757,SGM3755,SGM3738,SGM4825,SGM3736,SGM4826,SGM7SZ86,SGM3851A,SGM8198,SGM3741,SGM660,SGM3740,SGM3743,SGM41562B,SGM724,SGM72112B,SGM5209-14,SGM72112A,SGM2200,SGM4863,SGM2202,SGM2201,SGM2204,SGM2203,SGM2206,SGM4865,SGM2205,SGM3758,SGM3759,SGM8416-4,SGM722,SGM723,SGM721,SGM3760,SGM72004B,SGMNM45412,SGM8295-2,SGM8295-4,SGM8480-2,SGM2523C,SGM2523D,SGM2523A,SGM8295-1,SGM2523B,SGM3766,SGM4040B,SGM790A,SGM330A,SGM790B,SGM790C,SGM41100A,SGM41100V,SGM41100W,SGM2220,SGM8262-2,SGM8416-1,SGM2221

2023/4/7 - SGMICRO - 选型指南代理服务技术支持现货查询批量订货

SGM2822 2.4W Low EMI Class-D Audio Power Amplifier with Auto-Recovering Short-Circuit Protection

型号- SGM2822YUVC9G/TR,SGM2822

AUGUST 2024 - SGMICRO - 数据手册 - REV. A 代理服务技术支持现货查询批量订货

SGMicro（圣邦微）SGM4890系列音频功率放大器官方数据手册

描述- SGM4890（SGM4890YMS/TR）SGM4890 1.1W Audio Power Amplifier.

型号- SGM4890,SGM4890YMS,SGM4890YMS/TR

2017年3月 - SGMICRO - 数据手册代理服务技术支持现货查询批量订货

24bit ADC精密运放，电源基准，令信号链设计更简单

型号- SGM5860X,SGM4040B,SGM8255A-1,SGM8255A-2,SGM58200,SGM5351,SGM58031,SGM5200,SGM5353,SGM5352,SGM2045,SGM58602,SGM58603,SGM5202,SGM58600,SGM5209,SGM58601,SGM5208,SGM2049,SGM5349

SGMICRO - 商品及供应商介绍代理服务技术支持现货查询批量订货

了解功率放大器分类应用札记

2024 年 5 月 27 日 - SGMICRO - 技术文档 - REV.A 代理服务技术支持现货查询批量订货

【成功案例】基于国产音频功率放大器的音频电路及其采样电路的设计和优化方案

在医疗行业中，法规明确规定了医疗设备报警系统的安全可靠性，报警系统发出声音后必须回采，来判断喇叭是否正常，以确保设备出现故障后，操作人员能及时处理。笔者做过一款输液产品的研发，现将音频电路及其采样电路的设计经验分享给大家一下。本文讲述了一种基于圣邦微SGM4995的音频电路及其采样电路的设计和优化，用SGM722取代LM358，采样波形的频率恢复正常。

2017-12-20 - 设计经验代理服务技术支持现货查询批量订货

SGM4703 High-Power Stereo Class-D Audio Power Amplifier with Adjustable Power Limit and Automatic Level Control

型号- SGM4703YPTS28G/TR,SGM4703

NOVEMBER 2023 - SGMICRO - 数据手册 - REV. A. 1 代理服务技术支持现货查询批量订货查看更多版本

SGM2820YMS8G/TR PcbLib & SchLib & IntLib

型号- SGM2820YMS8G/TR

2024/4/24 - SGMICRO - CAD模型库代理服务技术支持现货查询批量订货

【应用】立体声耳机放大器SGM4917A用于直播声卡设备耳返功能，工作电流仅2.7 mA，总谐波失真加噪声0.02%

本文介绍SGMICRO圣邦微的立体声耳机放大器芯片SGM4917实现直播声卡设备耳返功能，完成对音频信号的功率放大，给耳返输出清晰的信号。功耗方面，工作电流也仅有2.7 mA，关断电流更低至0.01uA。音质方面，总谐波失真加噪声(THD+N)也达到了0.02%，在 RL = 32Ω, POUT = 20mW, BW ＜ 20kHz时的信噪比达到了100dB。

2020-06-18 - 应用方案代理服务技术支持现货查询批量订货

SGM DFAE Training--Charger

型号- SGM41563,SGM41522,SGM41566,SGM7SZ32,SGM41562B,SGM48751,SGM724,SGM41562,SGM41516,SGM41518,SGM41519,SGM41512,SGM41513,SGM4056X,SGM2203,SGM61060,SGM41513D,SGM41510,SGM41513A,SGM41511,SGM61020,SGM722,SGM324,SGM4056,SGM8770,SGM4890,SGM803B,SGM41541,SGM41542,SGM41543,SGM61230,SGM40666AS,SGM358,SGM42505,SGM3752,SGM2225,SGM2036S,SGM7SZ08,SGM7SZ04,SGM41523B,SGM41523C,SGM41600A,SGM41523A,SGM42500,SGM41570,SGM41523D,SGM41573,SGM40561,SGM41527,SGM41528,SGM41523,SGM2593D,SGM41600,SGM41524,SGM8199,SGM41526,SGM2536

2023/3/25 - SGMICRO - 商品及供应商介绍代理服务技术支持现货查询批量订货