【应用】集成boost升压和电流镜功能的DC/DC电源芯片SGM41282C在OLT光模块设计的使用
在PON网络系统中,OLT设备实现与多个ONU(光网络单元)通过POS连接功能,这连接实现的关键设备是OLT光模块,完成上联下联设备的数据问题连接和转发,因此不管是以前的EPON合适目前最新的GPON,OLT光模块均是一款核心器件。
常用OLT光模块发射单元有时采用对称设计,可能使用2两个激光器,而接收单元,一般均采用APD将探测的激光信号转换成电信号,放大并整形输出,为了保证接收灵敏度能够达到理想范围,需要保证在不同温度下对APD提供稳定高压。这一功能需要单片机通过ADC采样电路对APD电路控制实现,一个是升压,一个是实时监测APD电流。
图1 常用OLT光模块内部框图
对于大部分APD电路来说,升压功能是必不可少的,对于3.3V供电的芯片,需要升压到几十伏左右,有些是30V左右,长距离及DWDM模块一般需要达到60~70V等电压。而对于APD电流监控,业界常使用电流镜电源芯片实现监控,结合主控芯片实现不同大小增益反馈的采样、保持电路捕获采样信号,以便主控芯片ADC能够准确的测量信号,并提供可调钳制电流电阻控制APD电流。很明显,传统的APD设计需要两片芯片分别实现升压电路和APD电流监测功能。
这里我们介绍圣邦微一款集成boost升压和电流镜功能的DC/DC电源芯片SGM41282C芯片用于OLT光模块设计,将进一步简化OLT光模块设计,下图是SGM41282C的典型应用图,其集成了Current Mirror功能,直接将APD扁置电压反馈到芯片电流镜输入,并镜像输出扁置电流。同时其带boost功能,最高上限高达70V的升压幅度,满足目前市场上几乎所有的APD芯片的升压幅度要求。其整体外围电路相对较简单,加上芯片本身的TQFN_3x3-16L小封装设计,整体尺寸较小,非常适合应用于对于封装要求苛刻的光模块。
图2 SGM41282C常用应用框图
DC/DC电源芯片 SGM41282C功能:
●输入电压范围:2.8V ~ 5.5V
●输出电压范围从(VIN + 5V)到70V
●850kHz开关频率
●1:30输出电压编程
●精度可调,过电流保护
●内置1×/8×双增益电流镜
●小于1μA关闭电流
●全链电路:偏镜跟踪/保持
●替换*15059/*3430+*3923
●绿色TQFN-3×3-16L包装
●-40℃~ +85℃工作温度范围
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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.
型号- 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SGMICRO-TI/ADI/MAXIM/MPS/SILERGY/ST等信号链电源芯片对照表
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
【经验】DC/DC转换芯片SGM6607替代TPS6104设计的可调电源模块,输入3V到20V电压,输出最高38V电压
对研发人员来说电源是不可或缺的工具,常用的低电压等级有3.3V、5V、9V、12V、24V,针对不同电压等级芯片需要采用不同的电源。笔者基于世强代理的圣邦微电子有DC/DC转换芯片SGM6607制作的可调电源模块可以输入3V到20V电压,输出最高38v电压,可以满足绝大部分低电压等级的需求。
圣邦微在光模块中应用的相关产品,涵盖TEC/APD/EML驱动、高性能运放、DCDC等 | 视频
比较全面的展示了圣邦微在光模块中应用的相关产品,总的来说目前是有20--30个光模块相关产品。主要涵盖了TEC\APD\EML驱动这样的专用器件,高性能运放、电源相关LDO\DCDC、负压,负载开关以及温度传感器等产品。
具有高电流双向DC/DC转换器和电容器测量功能的SGM41664高效I²C备用电源管理器
描述- SGM41664是一款具有高效双向同步降压/升压转换器和电容测量能力的可编程电源管理集成电路。它适用于需要备用电源或储能能力的应用,例如固态驱动器(SSD)。该芯片支持宽输入电压范围,最高充电电压可达36V,并具备高电流双向DC/DC转换功能。
型号- SGM41664XTRQ25G/TR,SGM41664
【经验】如何实现低成本隔离电源设计?
专用于隔离电源设计的SGMICRO DC/DC转换控制器芯片SGM46000,可解决隔离电源设计复杂度较大、设计成本比较贵、体积比较大等问题。
【经验】DC/DC降压电源芯片SGM6012输出波形异常分析解决
在某客户的路由器产品中使用了圣邦微的DC/DC降压电源芯片SGM6012,输出电压值1.22V,给DDR供电,用示波器测试输出波形,交流模式下,测试输出波形的峰峰值高达71mV,如图2所示,且观察波形尖峰的频率在10kHz左右,与SGM6012工作频率1.6MHz并不相同。本文讲述如何分析该异常现象和解决方法。
SGM41282C 70V,2.5mA精密保护APD偏置双增益跟踪/保持电流镜
描述- SGM41282C是一款集成了升压转换器、双增益电流镜和跟踪/保持缓冲器的精密保护APD偏置器件。该器件适用于光纤模块,具有宽输入电压范围、高输出电压、低噪声等特点。
型号- SGM41282C,SGM41282CYTQ16G/TR
基于非同步降压型DC/DC调压器SGM6232的电源设计方案
SGMICRO SGM6232是一种采用电流模式非同步降压型拓步结构和片内集成功率型MOSFET的DC/DC调压器。具有周期轮询限流检测功能、过热保护功能和软启动功能,以及可以规避由于输入电压不稳带来的系统误操作的欠压锁定功能。用于实现限制浪涌电流或输出电压的过冲。带散热焊盘的SOIC-8封装,可以极大改善整个芯片的散热能力。
国产高性价比升压DC/DC SGM41285,可pin2pin替换MAX15059,成本降低30%
在100G QSFP光模块中,APD在工作时需要30-60V的反向电压,需要用到输出电压较高的DC/DC芯片,并且对DC/DC的响应速度、功耗、效率等参数要求非常高,因此为APD提供偏置电流的电源(DC/DC)是非常重要和关键的。国产圣邦微DC/DC升压变换器SGM41285,在功能、性能、价格、交期等方面表现优秀,完全可以PIN2PIN替换MAX15059。
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实验室地址: 成都 提交需求>
提供稳态、瞬态、热传导、对流散热、热辐射、热接触、和液冷等热仿真分析,通过FloTHERM软件帮助工程师在产品设计初期创建虚拟模型,对多种系统设计方案进行评估,识别潜在散热风险。
实验室地址: 深圳 提交需求>
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