L6563 STMicroelectronics, L6563 Datasheet - Page 3

• Manufacturer Part Number: L6563
• Description: IC PFC CTRLR TRANSITION 14SOIC
• Manufacturer: STMicroelectronics

Specifications of L6563

• Mode: Discontinuous (Transition)
• Current - Startup: 50µA
• Voltage - Supply: 10.3 V ~ 22 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 25 C
• For Use With: 497-9082 - EVAL BOARD L6563 (200W)497-8850 - BOARD EVAL FOR L6563/STW55NM60N497-8834 - BOARD DEMO FOR L6563/LL6566A497-8429 - BOARD ADAPTER L6599/STP12NM50N497-5854 - DEMO BOARD FOR L6563497-5496 - EVAL BOARD FOR L6599497-5493 - EVAL BOARD FOR L6563
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L6563 - L6563A
1
Description
The device is a current-mode PFC controller operating in Transition Mode (TM). Based on
the core of a standard TM PFC controller, it offers improved performance and additional
functions.
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 a precise
(1.5% @T
response to sudden mains voltage changes are improved by the voltage feedforward
function (1/V
Additionally, the IC provides the option for tracking boost operation (where the output
voltage is changed tracking the mains voltage). The device features extremely low
consumption (≤ 90 µA before start-up and ≤ 5 mA running).
In addition to an effective two-step OVP that handles normal operation overvoltages, the IC
provides also a protection against feedback loop failures or erroneous output voltage
setting.
In the L6563 a protection is added to stop the PFC stage in case the boost inductor
saturates. This function is not included in the L6563A. This is the only difference between
the two part numbers.
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) in the L6563 only and to disable the PFC stage in case of light load for the DC-
DC converter, so as to make it easier to comply with energy saving norms (Blue Angel,
EnergyStar, Energy2000, etc.). The device includes disable functions suitable for remote
ON/OFF control both in systems where the PFC pre-regulator works as a master and in
those where it works as a slave.
The totem-pole output stage, capable of 600 mA source and 800 mA sink current, is suitable
to drive high current MOSFETs or IGBTs. This, combined with the other features and the
possibility to operate with the proprietary Fixed-Off-Time control, makes the device an
excellent low-cost solution for EN61000-3-2 compliant SMPS in excess of 350W.
Figure 2.
J
= 25°C) internal voltage reference. The stability of the loop and the transient
Typical system block diagram
PFC PRE-REGULATOR
2
V
correction).
inac
L6563A
L6563
PWM is turned off in case of PFC’s
anomalous operation for safety
PFC can be turned off at light
load to ease compliance with
energy saving regulations.
CONTROLLER
Resonant
PWM or
DC-DC CONVERTER
V
outdc
Description
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