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Product Pages: 
L6562A
L6562
The latest device to enlarge the
PFC product family, is the L6562A,
a current-mode controller operating
in Transition Mode (TM). As an
evolution of the L6562, it has
become the industry reference
for several designs in LCD TVs,
AC-DC adapters and chargers, desktop
PCs and games, it mantains the
pin-to-pin compatibility, both
in SO-8 and DIP-8 packages, while
offering improved performance
and features. Since the new current
sense threshold of 1.1V (typ.)
allows the use of lower value/lower
wattage sense resistors, the overall
system efficiency is greatly increased.
Moreover, the operating current
and the dynamic over voltage protection
current have been reduced to further
limit the stand-by losses. The
new digital blanking time and
a reduced propagation delay time
allow the functionality at high
frequencies near to the zero-crossing,
reducing the overall total harmonic
distortion. By using ST’s
patented Fixed-Off-Time topology,
the output power can easily run
in excess of 400Watts. |
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 IEC61000-3-2
compliant SMPS (LCD TVs, desktops,
PCs, games)) up to 400W
High-end
AC-DC adapters/chargers
Electronic
ballasts
Entry
level servers and web servers
L6562A internal block diagram
Proprietary
multiplier design for minimum THD of
AC input current
Very
low power losses current sense for improved
system efficiency
Ultra
low (40µA typ.) start-up current
-600/+800mA
totem-pole gate driver with UVLO pull-down
and voltage clamp
Leading-edge
digital blanking time on current sense
Disable
function on Fb input
Precise
adjustable output overvoltage protection
1%
(@ Tj = 25°C) internal reference
voltage
SO-8
and DIP-8 packages
|
Parameter
/ Function |
L6562 |
L6562A |
Current
sense dynamics (typ.) |
1.7V |
1.1V |
|
Disable function by grounding FB
input |
No |
Yes |
IC
operating consumption @ 70kHz
(typ.) |
3.5mA |
3.0mA |
|
Dynamic OVP trigger current (typ.) |
40µA |
27µA |
Digital
Blanking time on
current sense |
No |
Yes |
|
ZCD arm/trigger/clamp
thresholds (typ.) |
2.1/1.6/0.7V |
1.4/0.7/0V |
IC
turn-on & turn-off thresholds
(typ.) |
12/9.5V |
12.5/10V |
|
Current sense propagation
delay (typ.) |
200ns |
120ns |
Turn-off
threshold spread (max.) |
±0.8V |
±0.5V |
|
Multiplier gain (typ.) |
0.6 |
0.38 |
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