Infineon Technologies IRS2982S | Demoboard IRXLED04

Description

The IRS2982S is a versatile SMPS controller IC primarily intended for LED drivers in the 5 to 100 W power rangessuitable for Buck, Buck-Boost and Flyback converters operating in critical conduction mode (CrCM) anddiscontinuous mode (DCM) at light loads. Flyback converters will be covered in this application note focusingon an isolated voltage regulated design with PFC.All of the control and protection required for the converter is integrated in the IRS2982S as well as a highvoltage start-up cell to enable rapid illumination at switch on over a wide line input voltage range. TheIRS2982S is also able to provide power factor correction in a single stage Flyback converter able to meet class C(lighting) line current harmonic limits of the EN61000-3-2 standard.A 55 W isolated voltage regulated PFC Flyback evaluation board based on the IRS2982S controller is describedin detail in this application note and detailed test results are presented.

Features

 AC Input voltage 100 VAC up to 265 VAC (45 to 65 Hz)

• Output voltage 55 VDC
• Maximum output voltage ripple +/-3 V @ full load
• The tolerance of the nominal output voltage is +/-5% in the power range from 10% up to 100% of therated output power.
• Maximum output continuous power 55 W
• PF >0.95 @50 W load and 230 VAC input voltage
• THD <10% @50% up to 100% load and < 20% @ 20% load with 230 VAC input voltage
• Efficiency >89% at 80% load and >88% at 100% load @ 230 VAC input voltage.
• Startup time to reach the secondary nominal output voltage of 55 VDC during full load condition and230 VAC input voltage must be <300 ms.

More information

• Datasheet
• IC product information