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On-Bright Electronics
On-Bright Electronics


OB6563

High Performance PFC Controller



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OB6563 pdf
DESCRIPTIONS
OB6563 is an active transition-mode (TM) power factor
correction (PFC) controller for AC-DC switching mode
power supply applications.
OB6563 features an internal start-up timer for stand-
alone applications, a one quadrant multiplier with THD
optimizer for near unity power factor, zero current
detector (ZCD) to ensure TM operation, a current
sensing comparator with built-in leading-edge blanking,
and a totem pole output ideally suited for driving a
power MOSFET.
OB6563 offers great protection coverage including
system over-voltage protection (OVP) to eliminate
runaway output voltage due to load removal, VCC under
voltage lockout (UVLO), cycle-by-cycle current limiting,
multiplier output clamping that limit maximum peak
switch current, and gate drive output clamping for
external power MOSFET protection.
With added system open loop protection feature,
OB6563 shuts down system when the feedback loop is
open.
In OB6563, the dynamic OVP sensing current is set to
10uA, which will decrease system standby power greatly.
When used with On-Bright PWM controller OB2298 or
Quasi-Resonant controller OB2203 in a 150W AC/DC
power design, it can deliver <0.4W standby power at
universal AC range input.
OB6563
www.DataSheet4U.com
High Performance PFC Controller
OB6563 is offered in SOP-8 and DIP-8 packages.
FEATURES
Transition Mode (TM) Operation
One quadrant multiplier with THD optimizer
Low Dynamic OVP Sensing Current Setting
Low Start-up Current and Operating Current
Cycle-by-Cycle Current Limiting
Internal RC Filter
Trimmed 1.5% Internal Bandgap Reference
Under Voltage Lockout with Hysteresis
Dynamic and Static Output Over-Voltage Protection
(OVP)
Internal Start-up Timer for Stand-alone Applications
Disable Function
Totem Pole Output with High State Clamping
System Open Loop Protection
Proprietary Audio Noise Free Operation
9.5V to 28V wide range of VCC voltage
APPLICATIONS
Electronic Ballast
AC-DC SMPS
TYPICAL APPLICATION
L1 C6 R6
D2 D3
C1 D1
R8 R2
R7 OB6563
C2 1 INV
VCC 8
AC + C4 Q1
2 COMP
GD 7
R4
C3
R1
3 MULT
4 CS
GND 6
ZCD 5
R3
R5
+
C5
©On-Bright Electronics
-1–
Confidential
OB_DOC_DS_6500



Part Number OB6563
Description High Performance PFC Controller
Maker On-Bright Electronics - On-Bright Electronics
Total Page 1 Pages
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