Infineon IRS2982STRPBF

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, trans-conductance 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.

• High voltage fast startup
• Voltage mode control
• Critical-conduction / transition mode operation
• Constant voltage / current regulation
• High power factor / low iTHD
• 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

• LED Drivers
• Power Supplies