STMicroelectronics EVAL BOARD FOR L6563 EVL6563H-250W EVL6563H-250W Data Sheet

Product codes
EVL6563H-250W
Page of 49
Description
L6563H
6/49
Doc ID 16047 Rev 3
1 Description
The L6563H is a current-mode PFC controller operating in transition mode (TM) which 
embeds the same features existing in the L6563S with the addition of a high voltage start-up 
source. These functions make the IC especially suitable for applications that have to be 
compliant with energy saving regulations and where the PFC pre-regulator works as the 
master stage.
The highly linear multiplier, along with a special correction circuit that reduces crossover 
distortion of the mains current, allows wide-range-mains operation with an extremely low 
THD even over a large load range. 
The output voltage is controlled by means of a voltage-mode error amplifier and an accurate 
(1% @Tj = 25 °C) internal voltage reference. Loop's stability is optimized by the voltage 
feedforward function (1/V
2
 correction), which in this IC uses a proprietary technique that 
considerably improves line transient response as well in case of mains both drops and 
surges (“bidirectional”). 
Additionally, the IC provides the option for tracking boost operation, i.e. the output voltage is 
changed tracking the mains voltage. 
The device includes disable functions suitable for remote ON/OFF control too.
In addition to an over voltage protection able to keep the output voltage under control during 
transient conditions, the IC is provided also with a protection against feedback loop failures 
or erroneous settings. Other on-board protection functions allow that brownout conditions 
and boost inductor saturation can be safely handled. 
An interface with the PWM controller of the DC-DC converter supplied by the PFC pre-
regulator is provided: the purpose is to stop the operation of the converter in case of 
anomalous conditions for the PFC stage (feedback loop failure, boost inductor's core 
saturation, etc.) and to handle the PFC stage in case of light load for the DC-DC converter, 
to make it easier to comply with energy saving regulations (Blue Angel, EnergyStar, 
Energy2000, etc.). 
The totem-pole output stage, capable of 600 mA source and 800 mA sink current, is suitable 
for big MOSFET or IGBT drive. This, combined with the other features and the possibility to 
operate with ST's proprietary fixed-off-time control, makes the device an excellent solution 
for SMPS up to 400 W that need to be compliant with EN61000-3-2 and JEITA-MITI 
standards.