Product Review
Single-stage LED driver targets price-sensitive retrofit bulbs
Anne-Francoise Pele2/1/2013 8:54 AM EST
User-configurable PF control
In single-stage LED drivers, there is a correlation between improving power factor (PF) and increasing output ripple. iWatt said the patent-pending, user-configurable PF correction in the iW3626 allows users to configure the PF strength from > 0.7 to > 0.9, enabling them to meet the various global mandates for PFC and input harmonics, while managing the trade-off between PF and output ripple. This helps ensure the required PF can be achieved with low output ripple, minimizing both flicker and the size of the output capacitor.
Click on image to enlarge
In single-stage LED drivers, there is a correlation between improving power factor (PF) and increasing output ripple. iWatt said the patent-pending, user-configurable PF correction in the iW3626 allows users to configure the PF strength from > 0.7 to > 0.9, enabling them to meet the various global mandates for PFC and input harmonics, while managing the trade-off between PF and output ripple. This helps ensure the required PF can be achieved with low output ripple, minimizing both flicker and the size of the output capacitor.
Click on image to enlarge
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