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OB5269
High Voltage Green Mode PWM Controller
GENERAL DESCRIPTION
OB5269 is a highly integrated current mode PWM
control IC with high voltage start up, optimized for
high performance, low standby power
consumption and cost effective offline flyback
converter applications.
PWM switching frequency at normal operation is
internally fixed and is trimmed to a tight range. At
no load or light load condition, the IC operates in
extended ‘burst mode’ to minimize switching loss.
Very low standby power consumption and very
high conversion efficiency is thus achieved.
High voltage startup is implemented in OB5269,
which features with short startup time and low
standby current.
OB5269 offers complete protection coverage with
auto-recovery including Cycle-by-Cycle current
limiting (OCP), over load protection (OLP), and
VDD under voltage lockout (UVLO). It also
provides the protections with latched shut down
including over temperature protection (OTP), and
over voltage (fixed or adjustable) protection (OVP).
Excellent EMI performance is achieved with On-
Bright proprietary frequency shuffling technique.
The tone energy at below 22KHZ is minimized to
avoid audio noise during operation.
OB5269 is offered in SOP8 package.
FEATURES
High Voltage Startup
Power on Soft Start Reducing MOSFET Vds
Stress
Frequency shuffling for EMI
Extended Burst Mode Control For Improved
Efficiency and Minimum Standby Power
Audio Noise Free Operation
Fixed 65KHZ Switching Frequency
Comprehensive Protection Coverage
o VDD Under Voltage Lockout with
Hysteresis (UVLO)
o Cycle-by-cycle over current protection
(OCP)
o Overload Protection (OLP) with auto-
recovery
o Over Temperature Protection (OTP) with
latch shut down
o VDD Over voltage Protection(OVP) with
latch shut down
o Adjustable OVP through external Zener
APPLICATIONS
Offline AC/DC flyback converter for
Battery Charger
Power Adaptor
Open-frame SMPS
TYPICAL APPLICATION
©On-Bright Electronics
Confidential
-1-
Preliminary Datasheet
OB_DOC_DS_526902
Datasheet pdf - http://www.DataSheet4U.net/

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OB5269
High Voltage Green Mode PWM Controller
GENERAL INFORMATION
Pin Configuration
The OB5269 is offered in SOP8 package, shown
as below.
RT
FB
CS
GND
18
27
OB5269
36
45
HV
NC
VDD
GATE
Ordering Information
Part Number
OB5269CP
Description
SOP8, Pb-free
OB5269CPA
SOP8, Pb-free in Taping
Package Dissipation Rating
Package
RθJA(/W)
SOP8
150
Absolute Maximum Ratings
Parameter
VDD DC Supply Voltage
High-Voltage Pin, HV
VDD Zener Clamp
VoltageNote
VDD DC Clamp Current
FB Input Voltage
CS Input Voltage
RT Input Voltage
Min/Max Operating
Junction Temperature TJ
Min/Max Storage
Temperature Tstg
Lead
Temperature
(Soldering, 10secs)
Value
30V
-0.3 to 500 V
VDD_Clamp+0.1V
10 mA
-0.3 to 7V
-0.3 to 7V
-0.3 to 7V
-40 to 150
-55 to 160
260
Note: VDD_Clamp has a nominal value of 32V.
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.
OB5269 X
X
X
Current Mode PWM Controller with HV
Startup
Package
C:SOP8
Package Pb free
P:lead-free
Packing
Blank:Tube
A:Taping
©On-Bright Electronics
Confidential
-2-
Preliminary Datasheet
OB_DOC_DS_526902
Datasheet pdf - http://www.DataSheet4U.net/

No Preview Available !

www.DataSheet.co.kr
Marking Information
OB5269
High Voltage Green Mode PWM Controller
YWWZZZ
OB5269CP
S
Y:Year Code
WW:Week Code(01-52)
ZZZ:Lot Code
C:SOP8 Package
P:Pb-free Package
S:Internal Code(Optional)
TERMINAL ASSIGNMENTS
Pin
Num
1
2
3
4
5
6
8
Pin Name
RT
FB
CS
GND
Gate
VDD
HV
I/O Description
Dual function pin. Either connected through a NTC resistor to ground for
I over temperature shutdown/latch control or connected through Zener to
VDD for adjustable over voltage protection
I
Feedback input pin. The PWM duty cycle is determined by voltage level
into this pin and the current-sense signal at CS pin
I Current sense input
P Ground
O Totem-pole gate driver output for power Mosfet
P Power Supply
P Connected to the line input or bulk capacitor via resistors for startup
RECOMMENDED OPERATING CONDITION
Symbol
VDD
TA
Parameter
VDD Supply Voltage
Operating Ambient Temperature
Min/Max
12 to 23.5
-20 to 85
Unit
V
©On-Bright Electronics
Confidential
-3-
Preliminary Datasheet
OB_DOC_DS_526902
Datasheet pdf - http://www.DataSheet4U.net/