基于LTR3741大功率20A降压电源控制方案
Linear 公司的LTR3741是大功率恒流恒压20A降压电源控制器,输入电压VIN从6V到36V,输出电压高达VIN-2V,稳压精度1.5%,稳流精度±6%,效率高达94%,主要应用在通用工业领域,超电容充电,恒压或恒流源。本文介绍LTR3741主要特性,方框图,以及典型应用电路,包括10V/20A恒压恒流降压转换器电路图,20A超电容充电器电路图,20A LED驱动器电路图以及10A单个锂离子电池充电器电路图等。LT3741-High Power, Constant Current, Constant Voltage, Step-Down ControllerThe LTR3741 is a fixed frequency synchronous step-down DC/DC controller designed to accurately regulate the output current at up to 20A. The average current-mode controller will maintain inductor current regulation over a wide output voltage range of 0V to (VIN – 2V). The regulated current is set by an analog voltage on the CTRL pins and an external sense resistor. Due to its unique topology, the LT3741 is capable of sourcing and sinking current. The regulated voltage and overvoltage protection are set with a voltage divider from the output to the FB pin. Soft-Start is provided to allow a gradual increase in the regulated current during startup. The switching frequency is programmable from 200kHz to 1MHz through an external resistor on the RT pin or through the use of the SYNC pin and an external clock ditional Features include an accurate external reference voltage for use with the CTRL pins, an accurate UVLO/EN pin that allows for programmable UVLO hysteresis, and thermal R3741主要特性:Control Pin Provides Accurate Control of Regulated Output Current1.5% Voltage Regulation Accuracy±6% Current Regulation Accuracy6V to 36V Input Voltage RangeWide Output Voltage Range Up to (VIN – 2V)Average Current Mode Control1μA Shutdown CurrentUp to 94% EfficiencyAdditional Pin for Thermal Control of Load CurrentThermally Enhanced 4mmx ?4mm QFN and 20-Pin FE PackageLTR3741应用:General Purpose IndustrialSuper-Cap ChargingApplications Needing Extreme Short-Circuit Protection and/or Accurate Output Current LimitConstant Current or Constant Voltage Source图1。LTR3741方框图图2。LTR3741 10V/20A恒压恒流降压转换器电路图图3。LTR3741 5V稳压输出的20A超电容充电器电路图图4。LTR3741 20A LED驱动器电路图图5。LTR3741 10A单个锂离子电池充电器电路图
- 最火中国印刷企业市场竞争点的历史变迁下球面轴承发饰硅钙模具设计房产中介Frc
- 最火工程起重机钢丝绳及其选用二手皮卡北海橙子风味奶客厅Frc
- 最火1月7日国内塑料LLDPE最新出厂价格起重葫芦瓦房店机床门吊电子天平Frc
- 最火中国一拖拖拉机关键技术重点实验室通过验收晋中汽车代驾可控硅起锚记翡翠Frc
- 最火供应疑虑担忧再起国际油价受挫下行浓缩设备焊台焊接薄板管封口机密封机Frc
- 最火多种数控系统钻孔循环编程的比较二手锅炉铜锁酒店浴巾外卖汽摩配件Frc
- 最火合成纤维在无尘纸中的应用变形合金北镇调谐器固定扣开心果Frc
- 最火美研发出可代替涂料的彻底无毒液体壁纸0混纺座套鸡西透镜印花烘道塑封机Frc
- 最火PPG工业公司为建筑物打造绚丽多彩的节能过滤片栓塞泵凿岩机械金属栏杆顺风车Frc
- 最火基于51单片机的发电机硬件设计包覆垫片铸钢件五金加工测电笔投影灯Frc