【经验】电流输出型环境光传感器ISL29006搭配LED驱动SGM3752，无需MCU实现自动调光功能

时间： 2020-06-06 来源：世强

技术问答

随着自动调光功能在手机中广泛应用，越来越多的产品都需要这个功能，光线较强时调高屏幕亮度，光线较暗调低亮度，能提高人眼观看的舒适度，同时降低产品功耗。环境光传感器能检测出环境光的变化，输出基本和光照强度成线性。目前的数字式环境光比较多，照度反馈给MCU后通过PWM控制LED驱动控制亮度，设计更灵活一点但成本较高。下面为大家介绍一种电流输出型环境光传感器方案ISL29006，无需MCU实现自动调光功能。

ISL29006是RENESAS瑞萨收购Intersil的产品，继承了其优异的模拟器件设计生产工艺。ISL29006搭配的光敏二极管波长为550nm自然光波长模拟人眼，带红外抑制能实现暗光时红外的干扰。拥有优异的输出线性度，反应快，照度范围为0.5 lux to 10,000 lux，采用2mmx2.1mm的ODFN 6脚小封装。

图1

下面介绍ISL29006如何实现无需MCU自动调光功能，以圣邦微的背光驱动 SGM3752为例。图1为MCU通过PWM控制调光的示意电路。那么如何实现只靠一颗ISL29006实现调光功能呢？请看图2，LED驱动的FB脚为LED电流的反馈脚，为电流驱动型，一般需要采样电阻实现检测。ISL29006的电流就接到FB管脚，实现负反馈控制。ISL29006为电流为输出型拉电流，和LED的电流一起流向SGM3752的FB脚，方向如图中所示。用E代表光照，芯片100lux时输出为1.6uA，电流和光照成线性即可算出E光照下的传感器输出电流。计算公式如下

光照E增大时，LED电流减小，同理E减小时LED的驱动电流增大，完成了自动调节背光亮度的功能。

图2

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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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

选型指南 - SGMICRO - 2024/6/11 PDF 英文下载

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

深圳市必易微电子股份有限公司

型号- KP52X20X,KP22065A,KP3282,KP13262,KP52X218,KP23130M,KP3281,KP311BH,KP13264,KP206D,KP16014A,KP206A,KP206B,KP36374,KP1326A,KP36373,KP12761FQ,KP21825CB,KP2064,KP22066A,KP524208A,KP2182,KPE30182M,KP40581P,KP30172M,KP21822M,KP85303,KP571106X,KP85302,KP1315A,KP85301,KP21822F,KPE30181M,KP107W,KPE90772B,KP40511,KP40512,KP107L,KP620303,KP23132M,KP1071CL,KP23132K,KP107Q,KP10780L,KP23162,KP23161,KP23160,KP21824BM,KP620305,KP521111A,KP21823M,KP523201A,KP35026,KP1469A,KP85211,KP35022,KP1074,KP52X201,KP1073,KP1194,KP1076,KP522211D,KP522211B,KP52X208,KP23264M,KP522211A,KP1469K,KS11062E,KP1191,KP1190,KP22086,KP1072,KP10781L,KP1193,KP13251,KP1192,KP22083,KP13252,KP22082,KP13134,KP13255,KP22081,KP13254,KP22080,KP523201C,KP13135,KP523201B,KP523201D,KP85201,KP85321,KP57223X,KP1184,KP52X211,KP35031,KP21824H,KP40612,KP3126,KP40613,KP4214,KP21824M,KP4213,KP21824L,KP40611,KP23122M,KP23267,KP23267M,KP21825C,KS082,KP4050,KP86202,KP86201,KP571115X,KP36573,KP36572,KP40660B,KS11064E,KP522201D,KP522201C,KP522201B,KP522201A,KP22066,KP22064,KP722XX,KP3501A,KP23151,KP22062,KP23150,KP70211XS,KP70211XT,KP523208B,KP523208A,KP523208D,KP1274FQH,KP523208C,KP2315A,KP1274FQC,KPE90771,KP2206A,KPE90773,KP21827B,KP22035,KP107BQ,KP23112M,KP22033,KP23121,KP52X10X,KP14651,KP14652,KP12353,KP12354,KP14653,KP14654,KP36675,KP36674,KP520411,KP36673,KP520419,KP21827M,KP23111M,KP107CQ,KP23132,KP23131,KP23130,KP90831,KP1274FNQ,KP90477X,KP523218D,KP523218A,KP35112,KP523218B,KP3284,KPE90874,KP1271FH,KP7122,KP522218D,KP522218B,KP522218A,KP18003B,KP16015,KP18003A,KP1271FN,KP16014,KP16017,KP1070L,KP22080H,KP18002F,KP1070Q,KP1601A,KP521401,KP12760F,KP521405,KP521403,KP7112,KP521409,KP22308A,KP522302E,KP15051,KP14622H,KP15052,KP22082A,KP22082B,KP14634A,KP1071L,KP32622,KP1601X,KP1505A,KP1071Q,KP81103,KP81102,KP81101,KP520421,KP1271FC,KP520429,KP1272FH,KP522208D,KP522208C,KP521119A,KP522208B,KP522208A,KP18320A,KP1272FN,KP14633A,KP40662B,KP21827,KP21824,KP21825,KP21822,KP4060,KP93101,KP41540,KP14632A,KP32601,KP83201A,KP83201B,KP83201C,KP40661B,KP521411,KP41662,KP1272FC,KP521419,KP23162M,KP40561,KP23162K,KP2822,KP12684FM,KP85632,KP85631,KP522405A,KP522405B,KP40562,KP40511P,KP31616,KP421,KP31614,KP22062A,KP1601,KP522403,KP522405,KP23152M,KP2806,KP18001A,KP521101,KP321AB,KP521103,KP521102,KP522312,KP52230X,KP12760FQ,KP521109,KP35064,KP521108,KP522318,KP521107,KP522403A,KP35062,KP12762F,KP522403B,KP14636L,KP522308E,KP14624H,KP15113,KP15114,KP511419,KP15111,KP521401A,KP15112,KP22064A,KP85402,KP1402A,KP522302,KP83102,KP12761F,KP522308,KP408X,KP1402D,KP127FQ,KP42262,KP18032,KP42261,KP1271FNQ,KP212,KP40612B,KP1078CL,KP2264H,KP10790,KP10791,KP10792,KP1078R,KP523302,KP2591A,KP521001,KP52220X,KP521009,KP1079A,KP523308,KP3210B,KP68301,KP521403A,KP40611B,KP1164M,KP2120B,KP522201,KP521111,KP22308,KP521119,KP22306,KP1076C,KP511101,KP2262H,KP512318,KP511109,KP32551,KP1511,KP523201,KP1078AL,KP1077A,KP1077B,KP41260,KP41261,KP2806A,KP68321,KP41262,KP521405A,KP5711XXX,KP201,KP1078BL,KP10780,KP18026,KP10781,KP28071,KP30262,KP522101,KP512318D,KP28134A,KP206,KP523312,KP13135A,KP22315A,KP40512M,KP1078A,KP1078B,KP523318,KP1078C,KP1273FN,KP41260D,KP1074L,KP14631A,KP511009,KP10750,KP10751,KP10752,KP1074Q,KP1455,KP28033,KP28032,KP3637,KP28034,KP1075A,KP1075B,KP1075C,KP70311X,KP18003,KP41361,KP22305L,KP10760,KP10761,KP10762,KP1075Q,KP30362,KP1326,KP28162,KP1325,KP22305A,KP52320X,KP1273FC,KP1076A,KP12682F,KP1076B,KP1274FC,KP2801A,KP2813A,KP18330,KP1274FH,KP1274FN,KP32511,KP1274FQ,KP2161B,KP1072L,KP32512,KP1313,KP119,KP1072Q,KP1315,KP526201C,KP116,KP526201B,KP526201A,KP118,KP22306A,KP52420X,KP21863,KP521409A,KP18106,KP123,KP122,KP18103,KP1073L,KP18108,KP1073Q,KP30584,KP3251A,KP23223,KP23223M,KP526208C,KP526208B,KP526208A,KP1273FQC,KP107AL,KP1463A,KP3310,KP1255,KP3311,KP23112,KP107AQ,KP23111,KP23110,KP571110X,KP2311A,KP2202A,KP2212,KP70311XT,KP70311XS,KP70211X,KP41262C,KP90641,KP525201A,KP12551,KP525201C,KP525201B,KP12553,KP12554,KP2205,KP2206,KP2203,KP2126B,KP2208,KP2201,KP2202,KP1234,KP90871,KP90872,KP41261C,KP90873,KP41261D,KP571100X,KP14622,KP14623,KP14501,KP1272FQH,KP52520X,KP2212B,KP1272FQC,KP1221,KP1462,KP1220,KP1465,KP1222,KP512318S,KP90661,KP1182,KP641100,KP311A,KP311B,KP3116,KP525208B,KP52620X,KP525208A,KP525208C,KP653202,KP653201,KP2264,KP3111,KP52X302,KP2262,KP13134A,KP3114,KP3112,KP642201,KP201H,KP642202,KP642203,KP201F,KPE201K,KP68500,KP1272FNQ,KP642200,KP201A,KP571130X,KP523211B,KP523211A,KP201E,KP523211D,KP201B,KP201C,KP2210A,KP1162,KP2011,KP3221,KS11064,KP1164,KS11062,KP2591(A),KP2012,KP3222,KP2013,KP620105,KP521909,KP18053,KP641003,KP1274F,KP620103,KP3211B,KP18058,KP18057,KP18056,KP18055,KP212A,KP18059,KP127F,KP321B,KP2122B,KP1271FQH,KP1271FQC,KP521901,KP18061,KP15113A,KP3212B,KP18062,KP18069,KP18068,KP68520,KP571120X,KP3206,KP2123B,KP3205,KP15114H,KP2591,KP524201A

商品及供应商介绍 - 必易微 - 2024.05 PDF 中文下载

【选型】国产LED驱动芯片SGM3752可P2P替换SY7200A应用于温控器，最大输出电压达35V

温控器目前非常广泛的用在办公室，商场以及小家庭里面，可以很方便的控制中央空调。温控器是通过LCD面板来显示温度等相关信息的，LCD本身不会发光，要想让其显示所要的数据，需要使用白光背光源，白色背光源一般由数个发光白色LED灯组成，LED灯的个数由屏的尺寸大小决定，要使LED灯亮，还要使用LED驱动芯片。

器件选型发布时间 : 2021-08-31

圣邦微电子荣膺2024年度“十大中国IC设计公司”奖项

在刚刚结束的 2024 年度中国 IC 设计成就奖颁奖典礼上，圣邦微电子获评“十大中国IC设计公司”。评选由全球电子技术领域领先媒体集团 AspenCore 举办，今年是圣邦微电子连续第十七年获此奖项。

原厂动态发布时间 : 2024-04-03

【成功案例】国产白光LED驱动芯片SGM3720在驱动天马TM050RDH03型LCD背光中的应用

本文介绍一种使用SGMICRO的SGM3720型内置高效率升压转换器的LED驱动芯片在天马TM050RDH03型LCD屏幕背光驱动中的应用方案，该芯片供电电压范围为2.7V~5.5V，芯片可驱动高达38V的输出LED负载，可通过PWM控制的方式实现在2kHz~60kHz的频率范围内对屏幕背光进行调节。

应用方案发布时间 : 2019-04-12

【应用】38V高效率升压LED驱动器SGM3766YTN5G/TR用于空气净化器驱动液晶屏背光，效率高达90%

目前空气净化器产品的液晶屏背光需要采用一款LED升压驱动器芯片，其芯片决定LED显示的效果。该产品实际使用需驱动6串x3并的白光LED，最大60mA电流，推荐圣邦微电子带PWM控制的38V高效率升压LED驱动器SGM3766YTN5G/TR。

应用方案发布时间 : 2022-05-21

SGMICRO白光LED驱动器选型表

1-6通道LED灯驱动，线性、开关驱动、电荷泵驱动，支持线性、PWM、IIC调光，mA级别的调光电流，1uA关断电流，uA级别静态电流

产品型号	品类	LED Connection	CH	Iq (μA)	SHDN Iq(μA)	Dimming	Package
SGM3758	White LED Drivers	Common Anode	1	200	1	PWM	TDFN-2×2-6L

选型表 - SGMICRO 立即选型

【选型】可替换TI TPS61040的国产升压DCDC SGM6601助力LCD背光驱动设计，输出电压值可高达38V

在LCD背光驱动电路设计时，一般会用到TI的升压芯片TPS61040做偏置电压电路。但随着国产化和成本压力日益增大，很多厂商急需一颗国产高性价比替换物料。本文重点推荐圣邦微的升压DCDC SGM6601可完美替换TPS61040。相比TI的TPS61040，SGM6601的输出电压值可高达38V；在静态功耗方面，SGM6601的表现更出色。

器件选型发布时间 : 2020-05-13