Integrated Circuit Ob2269 of Current Mode PWM Controller IC

Prod Model:	OB2269

Product Description

Lead time	2 to 3 days after receiving the payment.
Remark	100% New and original ; 30 days warranty
Payment	Heng Seng Bank (Hong Kong), Paypal,
Shipment	DHL ,TNT ,FEDEX, UPS or any other express

GENERAL DESCRIPTION
OB2269C is a highly integrated current mode PWM
control IC optimized for high performance, low
standby power and cost effective offline flyback
converter applications.
PWM switching frequency at normal operation is
externally programmable and trimmed to tight range.
At no load or light load condition, the IC operates in
extended 'burst mode' to minimize switching loss.
Lower standby power and higher conversion
efficiency is thus achieved.
VDD low startup current and low operating current
contribute to a reliable power on startup design with
OB2269C. A large value resistor could thus be used
in the startup circuit to minimize the standby power.
The internal slope compensation improves system
large signal stability and reduces the possible subharmonic
oscillation at high PWM duty cycle output.
Leading-edge blanking on current sense input
removes the signal glitch due to snubber circuit diode
reverse recovery. This greatly helps to reduce the
external component count and system cost in
application.
OB2269C offers complete protection coverage with
automatic self-recovery feature including Cycle-byCycle
current limiting (OCP), over load protection
(OLP), over temperature protection (OTP), VDD
over voltage protection (OVP) and under voltage
lockout (UVLO). The Gate-drive output is clamped
at 18V to protect the power MOSFET.
In OB2269C, OCP threshold slope is internally
optimized to reach constant output power limit over
universal AC input range.
Excellent EMI performance is achieved with OnBright
proprietary frequency shuffling technique
together with soft switching control at the totem pole
gate drive output

FEATURES
On-Bright Proprietary Frequency Shuffling
Technology for Improved EMI Performance
Extended Burst Mode Control For Improved
Efficiency and Minimum Standby Power Design
Audio Noise Free Operation
External Programmable PWM Switching
Frequency
Internal Synchronized Slope Compensation
Low VIN/VDD Startup Current(6.5uA) and Low
Operating Current (2.3mA)
Leading Edge Blanking on Current Sense Input
Complete Protection Coverage With Auto SelfRecovery
  o External Programmable Over Temperature
    Protection (OTP)
  o With or Without On-chip VDD OVP for
    System OVP
  o Under Voltage Lockout with Hysteresis
    (UVLO)
  o Gate Output Maximum Voltage Clamp (18V)
  o Line Compensated Cycle-by-Cycle Overcurrent
    Threshold Setting For Constant Output
    Current Limiting Over Universal Input Voltage
    Range (OCP)
  o Over Load Protection. (OLP)
 
APPLICATIONS
Offline AC/DC flyback converter for
Laptop Power Adaptor
PC/TV/Set-Top Box Power Supplies
Open-frame SMPS
Battery Charger