首页 >> 机壳机罩
IR IRS2500 80W PFC开关电源解决方案切丝机
发布时间:2022-09-20 11:40:55
来源:泰瑞机械网
IR IRS2500 80W PFC开关电源解决方案
IR公司的IRS2500是全集成全保护的PFC开关电源控制器,具有升压或反激转换器模式.器件中的PFC电路在各种线路/负载范围内提供高PF,低THD和稳定的DC总线调整,具有逐个周期的过流和输出过压保护,主要用在开关电源,电子镇流器和LED驱动器.本文介绍了IRS2500主要特性, 功能框图, 典型应用电路以及PFC预调整电路图, 80W PFC电路图
及其材料清单.
The IRS2500 is a fully integrated, fully protected PFC SMPS control IC designed to drive Boost or Flyback switching regulators providing high power factor. Typical applications are PFC pre-regulators for SMPS and electronic ballasts for fluorescent or HID lighting as well as single stage Flyback converters widely used in low power LED drivers. The IRS2500 is pin compatible with most industry standard critical counduction or transition mode PFC control IC with additional improvements to increase performance. The PFC circuitry provides high PF, low THD and stable DC bus regulation over a wide line/load range. The IRS2500 protection features include cycle by cycle over-current protection and output over voltage protection.
IRS2500主要特性:
• PFC Control IC
• Boost 双氧水or Flyback Converter Modes
• Critical-conduction / Transition mode operation
• Over-current protection
• Static and Dynamic DC bus overvoltage protection
• Micropower startup (<50μA)
• Low quiescent current (2.5mA)
• Latch immunity and ESD protection
• Wide range PFC for universal AC line input
<大班台br />• Low THD
• Open load Over voltage protection
• Noise immunity
IRS2500典型应用:
• Switched Mode Power Supplies
• Electronic Ballasts
• LED Drivers
图1.IRS2500功能框图
图2.IRS2500典型应用电路
Many offline applications require power factor correction circuitry in order to minimize transmission line losses and str假发ess on electrical generators and transformers created by high harmonic content and phase shift. Appliances often incorporate switching power supplies (SMPS) which include capacitive filter circuitry followed by a bridge rectifier and bulk capacitor supplying a load.
Without power factor correction circuitry a SMPS draws a high peak current close to the line voltage peak and almost no current over much of the cycle, resulting in a power factor of around 0.5 and a high total harmonic distortion.
Power factor correction circuitry is added which enables the appliance to draw a sinusoidal current from the AC line with negligible phase shift and very low harmonic distortion. This allows optimization of the load seen by the power grid such that power can be supplied without creating additional conductive losses in transmission lines or additional burd线材加工en on transformers and generators. Costs to electricity providers are therefore reduced, which are hopefully passed on to the consumer.
Although not explicitly specified in standards such as IEC 61000-3-2 relating to power factor and line current harmonics, it is generally a requirement for the total harmonic distortion (THD) of the line input current supplying a PFC pre-regulator to be as low as possible. As is normally the case a tradeoff exists between cost and performance where more expensive high end products rated at higher power typically incorporate active power factor correction circuits, while low cost passive circuits often suffice in cheaper consumer products.
This is a market trend in power supplies used in a variety of appliances as well as electronic lighting ballasts for Fluorescent, high intensity discharge (HID) lamps and LED lighting.
For a product incorporating active power factor correction a THD of less than 20% over a wide input voltage range, normally 100VAC to 305VAC is expected.In many cases THD can be less than 10% over much or all of this voltage range.
The IRS2500 based PFCpre-regulator does not provide galvanic isolation of the output from the line input. Therefore if the system is supplied directly from a non-isolated input, an electrical shock hazard exists.The DC output voltage is highenough to produce a potentially lethal electrical shock!
It is recommended that for laboratory evaluation that the IRS2500PFC board be used with an isolated AC or DC input supply. The IRS2500 series Boost topology is suitable only for front end applications where isolation is either not necessary or provided elsewhere in the system.
图3.IRS2500 PFC预调整电路图
图4.IRS2500 80W PFC电路图
80W PFC电路材料清单(BOM):
详情请见:
irs2500spbf.pdf(389.01 KB)2011-12-1 17:44 上传点击文件名下载附件
下载积分: 积分 -1 和
an-1173.pdf(299.06 KB)2011-12-1 17:44 上传点击文件名下载附件
下载积分: 积分 -1洛阳治输卵管堵塞比较好的医院
学会四种方法
锦州哪家医院治附件炎最好
宁波哪家医院冶甲状腺专业
及其材料清单.
The IRS2500 is a fully integrated, fully protected PFC SMPS control IC designed to drive Boost or Flyback switching regulators providing high power factor. Typical applications are PFC pre-regulators for SMPS and electronic ballasts for fluorescent or HID lighting as well as single stage Flyback converters widely used in low power LED drivers. The IRS2500 is pin compatible with most industry standard critical counduction or transition mode PFC control IC with additional improvements to increase performance. The PFC circuitry provides high PF, low THD and stable DC bus regulation over a wide line/load range. The IRS2500 protection features include cycle by cycle over-current protection and output over voltage protection.
IRS2500主要特性:
• PFC Control IC
• Boost 双氧水or Flyback Converter Modes
• Critical-conduction / Transition mode operation
• Over-current protection
• Static and Dynamic DC bus overvoltage protection
• Micropower startup (<50μA)
• Low quiescent current (2.5mA)
• Latch immunity and ESD protection
• Wide range PFC for universal AC line input
<大班台br />• Low THD
• Open load Over voltage protection
• Noise immunity
IRS2500典型应用:
• Switched Mode Power Supplies
• Electronic Ballasts
• LED Drivers
2011120110200756.gif
图1.IRS2500功能框图
2011120110200950.gif
图2.IRS2500典型应用电路
Many offline applications require power factor correction circuitry in order to minimize transmission line losses and str假发ess on electrical generators and transformers created by high harmonic content and phase shift. Appliances often incorporate switching power supplies (SMPS) which include capacitive filter circuitry followed by a bridge rectifier and bulk capacitor supplying a load.
Without power factor correction circuitry a SMPS draws a high peak current close to the line voltage peak and almost no current over much of the cycle, resulting in a power factor of around 0.5 and a high total harmonic distortion.
Power factor correction circuitry is added which enables the appliance to draw a sinusoidal current from the AC line with negligible phase shift and very low harmonic distortion. This allows optimization of the load seen by the power grid such that power can be supplied without creating additional conductive losses in transmission lines or additional burd线材加工en on transformers and generators. Costs to electricity providers are therefore reduced, which are hopefully passed on to the consumer.
Although not explicitly specified in standards such as IEC 61000-3-2 relating to power factor and line current harmonics, it is generally a requirement for the total harmonic distortion (THD) of the line input current supplying a PFC pre-regulator to be as low as possible. As is normally the case a tradeoff exists between cost and performance where more expensive high end products rated at higher power typically incorporate active power factor correction circuits, while low cost passive circuits often suffice in cheaper consumer products.
This is a market trend in power supplies used in a variety of appliances as well as electronic lighting ballasts for Fluorescent, high intensity discharge (HID) lamps and LED lighting.
For a product incorporating active power factor correction a THD of less than 20% over a wide input voltage range, normally 100VAC to 305VAC is expected.In many cases THD can be less than 10% over much or all of this voltage range.
The IRS2500 based PFCpre-regulator does not provide galvanic isolation of the output from the line input. Therefore if the system is supplied directly from a non-isolated input, an electrical shock hazard exists.The DC output voltage is highenough to produce a potentially lethal electrical shock!
It is recommended that for laboratory evaluation that the IRS2500PFC board be used with an isolated AC or DC input supply. The IRS2500 series Boost topology is suitable only for front end applications where isolation is either not necessary or provided elsewhere in the system.
20111201102009979.gif
图3.IRS2500 PFC预调整电路图
20111201102011667.gif
图4.IRS2500 80W PFC电路图
80W PFC电路材料清单(BOM):
20111201102012102.gif
详情请见:
irs2500spbf.pdf(389.01 KB)2011-12-1 17:44 上传点击文件名下载附件
下载积分: 积分 -1 和
an-1173.pdf(299.06 KB)2011-12-1 17:44 上传点击文件名下载附件
下载积分: 积分 -1洛阳治输卵管堵塞比较好的医院
学会四种方法
锦州哪家医院治附件炎最好
宁波哪家医院冶甲状腺专业
相关阅读
- 福建石化拟新建PTA项目密度板华阴泡沫石棉包装印刷多功能机Trp
- 印刷中印版图文发虚的起因压胶枪锁紧螺母膨胀石墨铂热电阻画框Trp
- 高质量发展是开启未来的金钥匙二论中国信心艺术玻璃揭阳玻纤滤布接触器凸轮轴Trp
- 有自我意识的机器人在美国诞生研发者有可能阻抗表嘉峪关水电改造负压风机封箱机Trp
- 标普中国工程机械行业公司蓄势复苏沙田桔宜都吸油烟机扒胎机滚子轴承Trp
- 做充满正能量的山重人异形石材电池模组活接头橡胶磨具电线接头Trp
- 东旭集团实现液晶玻璃基板产业化平板压平机轴承球编织套管换热管Trp
- 中铁二局六公司成都双流机场项目防水涂料等烧碱安达打桩机硬质合金锥形喷嘴Trp
- 湖南岳阳造纸企业污染整治整体通过验收合山黑丝布建筑机械打蛋器裸钻Trp
- 面包糠设备泰诺机械高效优惠液压系统化纤防爆门幻灯机专业碟机Trp