OB2273
Overview
- Power on Soft Start Reducing MOSFET Vds control IC optimized for high performance, low Stress standby power and cost effective offline flyback
- Frequency shuffling for EMI converter applications. PWM switching frequency at normal operation is internally fixed and is 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 and low standby design with OB2273. OB2273 offers complete protection coverage with
- Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design * *
- Audio Noise Free Operation Fixed 65KHZ Switching Frequency Comprehensive Protection Coverage o o VDD Under Voltage Lockout with Hysteresis (UVLO) Cycle-by-cycle over current threshold o setting for constant output power limiting t over universal input voltage range auto-recovery including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), and l VDD under voltage lockout (UVLO). It also provides the protections with latched shut down a including over temperature protection (OTP), and i over voltage (fixed or adjustable) protection (OVP). Excellent EMI performance is achieved with On- t Bright proprietary frequency shuffling technique.
- The tone energy at below 20KHZ is minimized in the design and audio noise is eliminated during e operation. fid OB2273 is offered in SOT23-6 and DIP-8 package. o Overload Protection (OLP) with autorecovery 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
Representative OB2273 image (package may vary by manufacturer)
