Overview
The L6563HTR, produced by STMicroelectronics, is a current-mode Power Factor Correction (PFC) controller operating in transition mode (TM). It incorporates the same features as the L6563S with the additional benefit of a high voltage start-up source. This IC is particularly suited for applications requiring compliance with energy-saving regulations and where the PFC pre-regulator acts as the master stage. The device features a highly linear multiplier and a special correction circuit to reduce crossover distortion of the mains current, enabling wide-range mains operation with extremely low Total Harmonic Distortion (THD) even over a large load range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Voltage range (referred to ground) - VHVS | -0.3 to 700 | V |
| IC supply voltage (Icc = 20 mA) - Vcc | 10.3 to 22.5 | V |
| Turn-on threshold - VccOn | 11 to 13 | V |
| Max. thermal resistance, junction to ambient - RthJA | 120 | °C/W |
| Power dissipation at TA = 50 °C - Ptot | 0.75 | W |
| Junction temperature operating range - TJ | -40 to 150 | °C |
| Storage temperature - Tstg | -55 to 150 | °C |
| Internal reference voltage accuracy (at TJ = 25 °C) | 1% | |
| Totem-pole gate driver current | -600/+800 mA | mA |
| Start-up current | ≤ 100 µA | µA |
| Operating bias current | ≤ 6 mA | mA |
Key Features
- On-board 700 V start-up source
- Tracking boost function
- Fast “bidirectional” input voltage feedforward (1/V2 correction)
- Interface for cascaded converter's PWM controller
- Remote ON/OFF control
- Accurate adjustable output overvoltage protection
- Protection against feedback loop disconnection (latched shutdown)
- Inductor saturation protection
- Low (≤ 100 µA) start-up current and 6 mA max. operating bias current
- 1% (at TJ = 25 °C) internal reference voltage
- -600/+800 mA totem pole gate driver with active pull-down during UVLO
Applications
- PFC pre-regulators for high-end AC-DC adapters/chargers
- SMPS compliant with IEC61000-3-2 or JEITA-MITI standards, in excess of 400 W
- SMPS for LED luminaires
Q & A
- What is the primary function of the L6563HTR?
The L6563HTR is a current-mode Power Factor Correction (PFC) controller operating in transition mode (TM).
- What is the voltage range of the high voltage start-up source?
The high voltage start-up source operates within a voltage range of -0.3 to 700 V.
- What is the purpose of the tracking boost function?
The tracking boost function allows the output voltage to change in accordance with the mains voltage.
- How does the device protect against feedback loop failures?
The device includes protection against feedback loop disconnection, which triggers a latched shutdown in case of failure.
- What is the accuracy of the internal reference voltage?
The internal reference voltage has an accuracy of 1% at TJ = 25 °C.
- What are the key applications of the L6563HTR?
The L6563HTR is used in PFC pre-regulators for high-end AC-DC adapters/chargers, SMPS compliant with IEC61000-3-2 or JEITA-MITI standards, and SMPS for LED luminaires.
- How does the device handle inductor saturation?
The device includes inductor saturation protection, which temporarily stops the converter and limits the stress on power components in case of inductor saturation.
- What is the maximum thermal resistance of the device?
The maximum thermal resistance, junction to ambient (RthJA), is 120 °C/W.
- What is the operating bias current of the device?
The operating bias current is ≤ 6 mA.
- How does the device support remote ON/OFF control?
The device includes remote ON/OFF control functionality.
