OB5269
High Voltage Green Mode PWM Controller
GENERAL DESCRIPTION
FEATURES
OB5269 is a highly integrated current mode...
OB5269
High
Voltage Green Mode PWM Controller
GENERAL DESCRIPTION
FEATURES
OB5269 is a highly integrated current mode PWM ■ High
Voltage Startup
control IC with high
voltage start up, optimized for ■ Power on Soft Start Reducing
MOSFET Vds
high performance, low standby power
Stress
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.
■ ■
■ ■ ■
Ktec 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)
High
voltage startup is implemented in OB5269, which features with short startup time and low standby current.
to OB5269 offers complete protection coverage with
auto-recovery including Cycle-by-Cycle current
l limiting (OCP), over load protection (OLP), and
VDD under
voltage lockout (UVLO). It also
tia 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-
n Bright proprietary frequency shuffling technique.
The tone energy at below 2...