STMicroelectronics L6561 Power Factor Corrector
The L6561 from STMicroelectronics is a versatile Power Factor Correction (PFC) controller IC that is designed to construct a reliable and efficient power factor correction stage. It is particularly suitable for applications that require compliance with the IEC61000-3-2 standard. The L6561 is based on a proprietary "Transition-Mode" control technique, offering a cost-effective solution for power supplies ranging up to 200W.
Key Features
- Transition-mode PFC
- Low power (
- Low (
- Direct drive of the power MOSFET
- Source/sink output stage
- Overvoltage protection (OVP)
- Disable function
- 1% (@Tj = 25°C) precision internal reference voltage
- Under-Voltage Lockout (UVLO) with hysteresis
- Very low operating supply current
- High current totem pole output
- Internally trimmed bandgap reference
- Low start-up current (
Applications
The L6561 is ideal for a wide range of applications that require improved power factor and reduced total harmonic distortion. These applications include:
- Electronic ballasts for fluorescent lighting
- Adapters and chargers for mobile devices
- Standby power supplies for desktop and notebook computers
- Entry-level ATX power supplies for desktop computers
- Flat TVs and monitors
- Auxiliary supplies for motor control
Product Benefits
The L6561 enhances system reliability and power efficiency, which are critical in high-performance power supply designs. Its transition-mode operation enables reduced power dissipation and smaller heatsink requirements, leading to a more compact design. Additionally, the extensive protection features, including OVP and UVLO, ensure safe operation under abnormal conditions, contributing to the longevity of the end product.
