Overview
The L6563 is an advanced transition-mode Power Factor Correction (PFC) controller designed by STMicroelectronics. It is built on the core of a standard TM PFC controller and offers improved performance along with additional functionalities. This IC is particularly suited for applications requiring high power factor and low Total Harmonic Distortion (THD) over a wide range of mains voltages and load conditions.
The device features a highly linear multiplier and a special correction circuit that reduces crossover distortion of the mains current, enabling wide-range-mains operation with extremely low THD. The output voltage is controlled using a voltage-mode error amplifier and an accurate internal voltage reference.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Current - Max | 5.5 mA | mA |
| Supply Voltage - Max | 22 V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package Style | SOIC-14 | |
| Mounting Method | Surface Mount | |
| Turn-on Threshold | 11 to 13 V | V |
| Turn-off Threshold | 8.7 to 10.3 V | V |
| Internal Reference Voltage | 1.5% (@ TJ = 25°C) | % |
| Gate Driver Current | -600/+800 mA | mA |
Key Features
- Very precise adjustable output overvoltage protection
- Tracking boost function to adjust output voltage based on mains voltage
- Protection against feedback loop failure (latched shutdown)
- Interface for cascaded converter's PWM controller
- Input voltage feedforward (1/V2 correction) for improved line transient response
- Remote ON/OFF control
- Low start-up current (≤90 μA) and low quiescent current (≤5 mA)
- Inductor saturation detection (L6563 only)
- Totem-pole gate driver with active pull-down during UVLO
Applications
- PFC pre-regulators for high-end AC-DC adapters and chargers
- Desktop PCs, servers, and web servers
- IEC61000-3-2 or JEIDA-MITI compliant SMPS, exceeding 350W
Q & A
- What is the primary function of the L6563?
The L6563 is a Power Factor Correction (PFC) controller designed to improve power factor and reduce Total Harmonic Distortion (THD) in power supply systems.
- What package type is the L6563 available in?
The L6563 is available in a SOIC-14 package.
- What is the operating temperature range of the L6563?
The operating temperature range of the L6563 is -40°C to 125°C.
- What is the turn-on threshold voltage for the L6563?
The turn-on threshold voltage for the L6563 is between 11 V and 13 V.
- Does the L6563 support remote ON/OFF control?
- What is the purpose of the tracking boost function in the L6563?
The tracking boost function allows the output voltage to be adjusted based on the mains voltage.
- How does the L6563 protect against feedback loop failure?
The L6563 includes a protection mechanism that shuts down the IC and reduces its consumption in case of feedback loop failure, which is latched and requires a Vcc cycle to resume normal operation.
- What is the maximum gate driver current of the L6563?
The L6563 has a totem-pole gate driver capable of -600 mA source and +800 mA sink current.
- Is the L6563 compliant with energy-saving regulations?
- What is the difference between the L6563 and L6563A?
The main difference is that the L6563 includes inductor saturation detection, which is not present in the L6563A.
