Infineon Technologies IRS2982S | Demoboard IRXLED10

Description

The IRXLED10 reference design is a 75 W rated two-stage non-dimmable LED driver solution. The topology consists of a Power Factor Correction (PFC) boost converter front end based on the IRS2505L controller IC, followed by a tightly regulated Constant Current (CC) regulated buck LED driver based on the IRS2982. The IRS2505L is a Critical Conduction Mode (CrCM) PFC controller IC primarily intended for front-end PFC pre-regulators and typically used in power supply and lighting applications up to 150 W. The IRS2505L-based boost PFC pre-converter is able to meet the requirements of EN 61000-3-2, including class C limits for lighting applications. In some cases it is also appropriate to use this controller in other SMPS topologies such as buck,buck-boost and flyback. The back-end buck stage in this LED driver is configured for CC regulation using the IRS2982 controller operating in CrCM. The IRS2982 LED driver IC provides an accurately controlled current and protects the LEDs against damage from over-load.The design procedure for the PFC stage based on the IRS2505L differs slightly from the procedure used for industry-standard 8-pin CrCM PFC control ICs, and will be explained in detail here. In order for the circuit to produce optimum performance care must be taken to select the correct component values and ratings. The PCB must also be designed according to correct practices for SMPS design, for which guidelines are provided, to avoid ground loops and noise susceptibility.

Features

• High voltage fast startup
• Voltage mode control
• Critical-conduction / transition mode operation
• High power factor
• 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

Typical applications

• Power Supplies
• lighting leds

More information

• Datasheet
• IC product information