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OB6563
High Performance PFC Controller
Product Specification
GENERAL DESCRIPTION
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 is offered in SOP-8 and DIP-8 packages.
TYPICAL APPLICATION
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
Very Precise Adjustable Output Overvoltage
Protection
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
©On-Bright Electronics
Confidential
-1-
Datasheet
OB_DOC_DS_6563A3

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GENERAL INFORMATION
Terminal Assignment
In SOP8 or DIP8 Package.
INV 1
8 VCC
COMP
2
7 GD
MULT
3
6 GND
CS 4
5 ZCD
Ordering Information
Part Number
OB6563AP
Description
8 Pin DIP, Pb free in Tube
OB6563CP
8 Pin SOP, Pb free in Tube
OB6563CPA
8 Pin SOP, Pb free in T&R
Package Dissipation Rating
Package
RθJA (/W)
DIP8
90
SOP8
150
OB6563
High Performance PFC Controller
Absolute Maximum Ratings
Symbol
VCC
Parameter
DC Supply
voltage
I_ZCD
Zero Current
Detector Max.
Current
CS
INV
COMP
MULT
Analog inputs
& outputs
Maximum
Tj
Operating
Junction
Temperature
Min/Max
Tstg
Storage
Temperature
Lead
(Soldering,
Temperature 10secs)
Value
30 V
50mA(source)
-10mA(sink)
-0.3 to 7V
150
-55 to 150
260
Note: Stresses beyond those listed under “absolute
maximum ratings” may cause permanent damage to the
device. These are stress ratings only, functional operation of
the device at these or any other conditions beyond those
indicated under “recommended operating conditions” is not
implied. Exposure to absolute maximum-rated conditions for
extended periods may affect device reliability.
©On-Bright Electronics
Confidential
-2-
Datasheet
OB_DOC_DS_6563A3

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Marking Information
OB6563
High Performance PFC Controller
TERMINAL DESCRIPTIONS
Pin Num Pin Name
1 INV
2 COMP
3 MULT
4 CS
5 ZCD
6 GND
7 GD
8 VCC
I/O Description
I
Inverting Input of Error Amplifier. Connected to Resistor Divider from
System Output. This pin is also used for system open loop protection.
O
Output of Error Amplifier. A feedback compensation network is placed
between COMP and the INV pin.
Input of Multiplier. Connected to Line Voltage after Bridge Diodes via A
I Resistor Divider to Provide Sinusoidal Reference Voltage to the Current
Loop.
I Current Sense Input Pin. Connected to MOSFET Current Sensing Node.
I
Zero Current Detection Input. When Activated, A New Switching Cycle
Starts. If it is connected to GND, the device is disabled.
P Ground Pin
O Gate driver output. Drive Power MOSFET.
P DC Supply Voltage.
©On-Bright Electronics
Confidential
-3-
Datasheet
OB_DOC_DS_6563A3