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[bwin中国可以用吗? ] Infineon IRS2982S多用途开关电源(SMPS)控制器解决方案

关键词:电源管理 开关电源 SMPS LED照明 IRS2982S

时间:2018-08-28 11:44:55       作者:Infineon       来源:bwin客户端

infineon公司的IRS2982S是多用途开关电源(SMPS)控制器,集成了高压起动,精密温度补偿内部基准,跨导型误差放大器,初级检测开路保护和逐个周期初级限流,和降压,升压,反激和其它SMPS电路拓扑兼容,主要用在LED驱动器和开关电源.本文介绍了IRS2982S主要特性,框图,应用电路以及IRXPSU1 36W反激评估板主要特性,电路图,材料清单和PCB设计图.

The IRS2982 is a versatile SMPS control IC designed to drive switching converters for LED drivers and power supplies. Features include; integrated high voltage start up, accurate temperature compensated internal reference, transconductance type error amplifier, primary sensed open circuit protection and cycle by cycle primary current limiting. The IRS2982 is compatible with Buck, Boost, Flyback and other SMPS circuit topologies and is able to regulate voltage or current directly or by secondary feedback through an opto-isolator. The high voltage startup cell enables the VCC supply to be derived initially from the DC bus until an auxiliary inductor winding or other supply source is able to take over enabling rapid start up under all line input voltage conditions. The IRS2982 uses voltage mode control operating in critical conduction (CrCM) with a minimum off time limit so that it enters discontinuous (DCM) mode at light loads. Burst mode operation is also available at very light loads.

The IRS2982 is ideal for single stage converters with an unsmoothed DC bus to obtain high power factor and low line current THD.

IRS2982S主要特性:

• High voltage fast startup
• Voltage mode control
• Critical-conduction / transition mode operation
• Constant voltage / current regulation
• Minimum off time (DCM at light load)
• Burst mode operation at very light load
• Cycle by cycle over-current protection
• Open load over voltage protection
• Micro-power startup (50μA)
• Low quiescent current
• Latch immunity and ESD protection
• Noise immunity

IRS2982S典型应用:

• LED Drivers
• Power Supplies


图1.IRS2982S框图

图2. IRS2982S非隔离反激LED驱动器-电流调整

图3. IRS2982S隔离反激开关电源(SMPS)-电压调整

图4. IRS2982S非隔离反激开关电源(SMPS)-电压调整

IRXPSU1 36W反激评估板

The purpose of this document is to provide a comprehensive functional description and guide to using the IRS2982S control IC for LED and general-purpose SMPS. The scope applies to all technical aspects that should beconsidered in the design process, including calculation of external component values,MOSFET selection andPCB layout optimization as well as additional circuitry thatmay be added if needed in certain cases.

The IRS2982S is a versatile SMPS controller IC primarily intended for LED drivers in the 5 to 100Wpower rangesuitable for buck, buck-boost and flyback converters operating in Critical Conduction Mode (CrCM) andDiscontinuous Conduction Mode (DCM) at light loads. Flyback converters will be covered in this application notefocusing on an isolated voltage-regulated design with Power Factor Correction (PFC).

All of the control and protection required for the converter is integrated in the IRS2982S as well as a HV start-upcell to enable rapid illumination at switch-on over a wide line input voltage range. The IRS2982S is also able toprovide PFC in a single-stage flyback converter able tomeet class C (lighting) line current harmonic limits of theEN 61000-3-2 standard.

A 36Wmultiple-output isolated constant voltage-regulated PFC flyback evaluation board based on theIRS2982S controller is described in detail in this application note and detailed test results are presented.


图5.IRXPSU1 36W反激评估板外形图(正面)

图6.IRXPSU1 36W反激评估板外形图(背面)

IRXPSU1 36W反激评估板指标:

Input and output at normal operation
• AC input voltage 90 V AC up to 265 V AC (45 to 65 Hz)
• Output voltages/output currents 3.3 V/0.15 A, 15 V/0.8 A, 30 V/0.8 A
• Maximumoutput voltage ripple on 3.3 V is +/-30mV, 15 V is +/- 1 Vp-p, 30 V is +/- 1.5 Vp-p at full load
• Maximumoutput continuous power 36W
• PF greater than 0.9, Total Harmonic Distortion (THD) less than 20 %for 40 %up to 100% load over anAC-line of 115 V AC and 230 V AC
• Efficiency greater than 80%for 50 %up to 100 %load over an AC-line of 115 V AC and 230 V AC
• Start-up time to reach the secondary nominal output voltages during full-load condition is less than 400ms
Protection features
• Primary output OVP
• Cycle-by-cycle primary OCP
Maximum component temperature
During worst-case scenario (ambient temperature 60℃ ) themaximumallowed component temperature is:
• Resistor less than 100℃
• Ceramic capacity, film capacity and electrolyte capacity less than 100℃
• Flyback transformer and chokes less than 100℃
• MOSFET, transistor and diodes less than 100℃
• IC less than 100℃
Dimensions of evaluation board
Maximumwidth 2.69 inches (68.4mm),maximumlength 6.98 inches (177.3mm)

图7.IRXPSU1 36W PFC反激评估板电路图
IRXPSU1 36W反激评估板材料清单:




图8.反激边压器指标图

图9.IRXPSU1 36W反激评估板PCB设计图:顶层元件面和走线

图10.IRXPSU1 36W反激评估板PCB设计图:底层元件面和走线
详情请见:
https://www.infineon.com/dgdl/Infineon-IRS2982S-DS-v11_00-EN.pdf?fileId=5546d462533600a40153567b886d2850
https://www.infineon.com/dgdl/Infineon-LED_IRS2982S_Multi-output_flyback_converter-AN-v01_02-EN.pdf?fileId=5546d462625a528f01625c50dd900000
Infineon-IRS2982S-DS-v11_00-EN.pdf
Infineon-LED_IRS2982S_Multi-output_flyback_converter-AN-v01_02-EN.pdf

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