【经验】基于SGM6132降压稳压器设计的非隔离、非同步整流型降压DCDC电源转换电路，效率可达91%

时间： 2018-07-24 来源：世强

技术问答

在电路中的应用,特别是需要大电流的情况,由于LDO压降损失的特性,LDO往往只能满足几百毫安的电流,和比较低的压降,而在电路中,如何满足小体积大电压转换和大电流输出呢，这就需要使用非隔离式降压BUCK电路.

本文介绍设计一款非隔离、非同步整流型降压DCDC电源转换电路的设计。

如图1，是降压DCDC电路的整体原理图

图1

此电路方案基于圣邦微降压稳压器SGM6132，SGM6132是一款带内部功率MOSFET的电流模式降压稳压器。该器件可在4.5V至28.5V的宽输入电源范围内实现3A连续输出电流，并具有出色的负载动态调整率。 SGM6132的开关频率为1.4MHz，可极大的提高电源的转换效率，电流模式操作可提供快速瞬态响应并简化环路，提高稳定性。

SGM6130降压稳压器具有高效率，运行时峰值效率为91％。在关断模式下，稳压器的电源电流小于18μA。保护功能包括逐周期电流限制和热关断。该器件还具有内部软启动和外部可调软启动功能，可限制浪涌电流并防止输出电压过冲。

如图2，是电源的效率曲线

图2

输出电压调节，电源的输出电压通过FB脚电位的反馈进行调节，可通过改变R1和R2的比例，改变FB脚对地的电位值来更改。

FB脚电位计算公式为：

输出电压调节公式：

在由开关输入电压驱动的同时，电感器需要向输出负载提供恒定电流。较大值的电感，可以保证输出纹波控制在合理范围内，确定所用电感值的方法是保证电感中的峰峰值纹波电流约为最大开关电流限制的30％。另外，确保峰值电感电流低于最大开关电流限制。电感值可通过以下公式计算：

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全部评论（14）

haibinxing Lv7. 资深专家 2018-12-06

学习一下
Nana Lv6. 高级专家 2018-12-06

打卡
djk0195 Lv7. 资深专家 2018-12-06

学习学习
滑翔机2301 Lv6. 高级专家 2018-12-05

学习
Ak1307 Lv4. 资深工程师 2018-11-19

学习了，

陌然 Lv6. 高级专家 2018-11-13

不错不错
海绵宝宝 Lv7. 资深专家 2018-11-12

内部软启动和外部可调软启动功能蛮实用的
NASA911 Lv8. 研究员 2018-11-11

学习了
burt Lv4. 资深工程师 2018-11-09

学习中
自主知识产权 Lv7. 资深专家 2018-11-09

支持

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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

SGMICRO DC/DC转换器选型表

SGMICRO DC/DC转换器选型表包含包含同步整流降压转换器、AMOLED显示屏电源降压、非同步降压转换器升压、同步整流升压转换器、非同步升压转换器、电荷泵DC/DC转换器、专用DC/DC转换器和LCM偏置电源；升降压、电荷泵供电，最大输入电压60V，最大开关电流10A，内置MOS。

产品型号	品类	CH	Vcc (Min)(V)	Enable	Iq (μA)	I_OUT(mA)	Package	Frequency (kHz)	SHDN Iq(μA)	Vcc (Max)(V)
SGM6010	DC/DC Synchronous Rectifier Buck Converters	1	3	L	0.41	3000	TDFN-3×3-10L	300 to 2000	2	5.5

选型表 - SGMICRO 立即选型

SGMICRO线性稳压器选型表

SGMICRO线性稳压器提供高可靠性LDO和高精度LDO；最低0.5V最高36V输入电压，最大输出3A大电流，多固定输出电压与可调输出电压，支持负压降压。

产品型号	品类	VOUT(V)	VIN (Min)(V)	VIN (Max)(V)	IOUT(mA)	DropoutVoltage(mV)	PSRR (dB)	Package
SGM2300	High Reliability LDOs	1.5, 1.8, 2.5, 2.8, 3.0, 3.3, 3.6, 5.0, Adj	4	18	50	1750	47	SOT-23-5 SOT-23

选型表 - SGMICRO 立即选型

SGM62118 High-Efficiency Buck-Boost Converter

型号- SGM62118,SGM62118XG/TR

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

SGM62117 High-Efficiency Buck-Boost Converter

型号- SGM62117XTGH10G/TR,SGM62117

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

SGM61630 60V, 3A Buck Converter with 50μA IQ

型号- SGM61630BXPS8G/TR,SGM61630AXPS8G/TR,SGM61630A,SGM61630B,SGM61630

数据手册 - SGMICRO - REV. A. 3 - DECEMBER 2023 PDF 英文下载查看更多版本

SGMicro（圣邦微） SGM6132 数据手册

型号- SGM6132,SGM6132YPS8G/TR,SGM6132YPS8

数据手册 - SGMICRO - REV. B - 2016年05月18日 PDF 英文下载

【应用】国产低噪声线性稳压器SGM2050XTRL20G/TR用于安防监控雷达，输出电流高达3A

客户在安防监控雷达产品的电源部分原使用国际主流的电源芯片，为了保证产品供货良好，希望找兼容方案，要求宽压输入，输出电流可以到3A的降压芯片。结合客户实际使用情况，笔者给其推荐了国产品牌SGMICRO（圣邦微）的SGM2050XTRL20G/TR，该器件是一款高精度、低噪声、极低压降的线性稳压器。它能够提供3A输出电流，典型压降仅为99mV。

应用方案发布时间 : 2023-06-22

圣邦微电源管理芯片：性能优良、品质卓越、性价比高

圣邦微电源管理芯片性能优良、品质卓越、性价比高，广泛应用于智能手机、数字电视、笔记本电脑、可穿戴式设备、工业控制、医疗设备等领域。圣邦微电源管理芯片包括：圣邦微LDO，圣邦微DC/DC转换芯片，圣邦微负载开关，圣邦微过压保护芯片，圣邦微锂电池充电管理芯片等。世强是圣邦微电子授权代理商，可供应圣邦微电源管理芯片，提供圣邦微电源管理芯片选型、圣邦微电源管理芯片，圣邦微电源管理芯片技术支持等服务。

厂牌及品类发布时间 : 2018-08-15