This document introduces the L6561 power converter application. The power converter uses the TM technique to achieve power factor correction, which has high power factor and low harmonics.
The document introduces the L6561, a Power Factor Correction (PFC) controller integrated circuit designed by STMicroelectronics. It utilizes Transition Mode (TM) PWM technology to achieve high power factors in low-power applications such as lamp ballasts and AC-DC adapters.
The note details the internal architecture of the L6561, including its supply block, error amplifier with overvoltage protection, zero current detection circuit for TM operation, multiplier block, and disable function. It explains how these blocks work together to control boost topology preregulators efficiently.
| Typical start-up current | 50uA typ. |
|---|---|
| Internal reference precision | 1% guaranteed |
| Recommended power range | below 150W |
| Available packages | Minidip and SO8 |
It is optimized for controlling PFC preregulators based on boost topology in electronic lamp ballasts, AC-DC adapters, and low power SMPS.
The device will be shut down to reduce current consumption.