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OB5269CPA

CategoryPower/power management    Switching power supply chip   
File Size365KB,11 Pages
ManufacturerOB(On-Bright)
Websitehttp://www.on-bright.com/cn/index.htm
Angbao Electronics (Shanghai) Co., Ltd. is located in Zhangjiang Hi-Tech Park, Pudong, Shanghai, a national information technology industry base in China. It is an enterprise engaged in the design of high-performance analog and mixed-analog integrated circuits. The company focuses on the design, development, testing and sales of analog and mixed-analog integrated circuit products based on advanced submicron CMOS, BIPOLAR, BICMOS, BCD and other process technologies, with communications, consumer electronics, computers and computer interface devices as market targets, and is committed to becoming a world-class analog and mixed integrated circuit design company.
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High Voltage Green Mode PWM Controller
OB5269
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
TYPICAL APPLICATION
O
n-
Br
©On-Bright Electronics
ig
ht
C
on
fid
Confidential
-1-
en
tia
APPLICATIONS
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
Offline AC/DC flyback converter for
Battery Charger
Power Adaptor
Open-frame SMPS
lt
o
Kt
Preliminary Datasheet
OB_DOC_DS_526902
ec
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