圣邦微电子的12位调光3通道WLED驱动器SGM37603/SGM37603A/SGM37604A，适合极暗环境使用

时间： 2019-05-16 来源：SGMICRO

技术问答

本文介绍圣邦微电子（SGMICRO）的12位调光3通道WLED驱动器——SGM37603/3A/4A。

SGM37603/3A/4A WLED驱动器概述：

· 24V输入耐压

· 1％电流通道匹配度

· 3％电流绝对精度

· 11位调光分辨率（SGM37603）

· 12位调光分辨率（SGM37603A/4A）

· 解决方案效率高达90％

· 最高可达29.5V的三个并联LED串

· PWM调光输入

· I2C可编程各通道独立开启关闭控制

· 完整的过压、过流、开路、短路、过热保护

· 最低12.21μA平均输出电流-适合极暗环境使用

为什么手机LCM需要1：1000亮度动态范围？

1、首先我们来看一下人类视觉体验原理

图1 人类正常视觉

图2 光角度与眩光

· 清楚地识别手机的图片和文字：15°

· 光线不能太强（相对的）

· 明亮的环境：

—如图3，当中心暗场的亮度低于环境1/5000时，中央视野区域完全是视觉黑色

—如图4，中心视野的颜色细节能够在其亮度大于环境1/10时识别

· 黑暗的环境：

—如图5，中心视区的亮度不得超过环境的三倍。当超过限制时，它会刺眼并导致眼睛疲劳

2、回头我们再来看为什么手机LCM需要1：1000亮度动态范围？

人体工程测试数据并找出背光动态要求

· 暗场和明场可以分别读取亮度，分别决定低亮度和高亮度

—最低：低亮环境亮度的3倍

3.4x3≈10lux（3.4cd/m2为明亮视觉区最低值）

—最高：高亮环境亮度的1/10

100000/10=10000lux（100000为平均日照最大值）

· W-LED驱动器的亮度动态范围（BDR）应大于：

10:10000=1:1000

ILED_MIN<20μA（20μA:20mA）

SGM37603X：12.21μA（12.21μA:20mA=1:1638）

SGM37603X WLED驱动器的优势：

1、适用于黑暗环境

· ILED_MIN <20μA

· SGM37603X：12.21μA

· 任何环境没有眩光

—乡村的夜晚

—没有月亮和星星的黑夜

—有遮光窗帘的房间

图6 I2C+PWM 亮度调节

2、卓越的调光模式

图7 LED电流VS亮度代码（00模式）

（1）调光优势：

· 11-bit→1:2000对比度

· 12-bit→1:3200对比度，步进更细腻

· 低亮度指数调光，更加平滑柔和

· 亮度低于6.25%（1.56mA）时以PWM-Based Current输出

（2）PWM-Based输出优势：

· 低亮度时瞬时输出电流仍然较大，避免LED色温飘移

（3）关于PWM模式纹波的解释：

· 仅低亮启动，输出纹波小

· 各通道采用移相输出，进一步减小输出纹波

SGM37603X应用于屏幕闪烁

图8 SGM37604A针对屏幕闪烁的典型应用

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本文由宝丁转载自SGMICRO，原文标题为:12位调光3通道WLED驱动器，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

全部评论（5）

用户56731903 Lv9. 科学家 2019-05-16

了解一下！！！
棒棒猫 Lv6. 高级专家 2019-05-16

学习一下
bluefantasy Lv8. 研究员 2019-05-16

学习一下
行行摄摄 Lv7. 资深专家 2019-05-16

学习一下
好运常伴吾 Lv8. 研究员 2019-05-16

学习

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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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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

SGM3752 38V High Efficiency, Boost White LED Driver with PWM Dimming Control

型号- SGM3752,SGM3752YTN6G/TR

数据手册 - SGMICRO - REV. A. 2 - AUGUST 2023 PDF 英文下载查看更多版本

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

SGM37310 35.5V High Efficiency, Boost White LED Driver with PWM Dimming Control

型号- SGM37310YTDI6G/TR,SGM37310

数据手册 - SGMICRO - REV. A 1 - AUGUST 2024 PDF 英文下载查看更多版本

SGM3756 38V High Efficiency, Boost White LED Driver with PWM Dimming Control

型号- SGM3756YTDI6G/TR,SGM3756

数据手册 - SGMICRO - REV. A. 1 - SEPTEMBER 2022 PDF 英文下载

圣邦微LED驱动器：白光LED驱动和LED闪光灯驱动，产品种类多，亮度可调，驱动电流最高可达2A

圣邦微电子（北京）股份有限公司（SGMICRO Corp）是一家专注于高性能、高品质模拟集成电路研发和销售的半导体公司，其推出的LED驱动器在显示屏LED背光驱动、LED闪光灯驱动等领域有着非常广泛的应用。圣邦微电子的LED驱动器分为白光LED驱动和LED闪光灯驱动两大类，包括高压多串多并WLED驱动器及大电流LED闪光灯驱动器等系列产品。

器件选型发布时间 : 2019-02-10

SGM37603S High Efficiency 3-String White LED Driver

型号- SGM37603SYG/TR,SGM37603S

数据手册 - SGMICRO - REV. A. 1 - AUGUST 2024 PDF 英文下载查看更多版本

【视频】圣邦微低功耗可直通降压转换器及多种高性能DCDC、ADC、DAC

型号- SGM42501,SGM61032,SGM42500,SGM61430,GM58603,SGM61032A,SGM61032B,SGM452,SGM5353,SGM450,SGM4027,SGM451,SGM58600,SGM58601

商品及供应商介绍 - SGMICRO PDF 中文下载

SGM DFAE Training Audio PA

型号- SGM4916,SGM4918A,SGM4918B,SGM4917,SGM470X,SGM4916A,SGM4918,SGM4916B,SGM61230,SGM37603A,SGM41519,SGM8743,SGM41513,SGM40666,SGM6602,SGM6029,SGM2820,SGM3756,SGM4703,SGM4700,SGM66051,SGM4917A,SGM3718,SGM4917B,SGM61020,SGM41573,SGM41527,SGM41528,SGM41523,SGM2571,SGM41526,SGM6612,SGM6611,SGM2059,SGM6610,SGM8910,SGM6614,SGM7229

商品及供应商介绍 - SGMICRO - 2023/3/25 PDF 中文下载