Current Mode PWM Power Switch, BL8851 Replace OB2273.
FEATURES

 Power on Soft Start Reducing MOSFET Vds
Stress

 Frequency shuffling for EMI 

 Extended Burst Mode Control For Improved 

   Efficiency and Minimum Standby Power Design 

 Audio Noise Free Operation 

• Fixed 65KHZ Switching Frequency 

 Internal Synchronized Slope Compensation 

 Leading Edge Blanking on Current Sense Input 

 Good Protection Coverage With Auto Self Recovery

  VDD Under Voltage Lockout with Hysteresis(UVLO)

  Over Temperature Protection (OTP) with auto-recovery 

  Cycle-by-cycle over current threshold setting for constant 

  output power limiting over universal inputvoltage range

  Overload Protection (OLP) with auto- recovery 

  Over voltage Protection(OVP) with auto-recovery 

  Adjustable OVP through external Zener

PIN CONFIGUTION
CROSS
OB2273 OB2273.pdf

No.12080

FEATURES

 Level 5 compliance with <100mW standby 

  power at universal AC input. 

 Power on Soft Start Reducing MOSFET Vds Stress 

 Frequency shuffling for EMI

 Extended Burst Mode Control For Improved Efficiency

   and Minimum Standby Power Design

 Audio Noise Free Operation

 Fixed 65KHZ Switching Frequency 

 Comprehensive Protection Coverage 

   VDD Under Voltage Lockout with Hysteresis (UVLO) 

   Cycle-by-cycle over current threshold setting for 

     constant output power limiting over universal 

     input voltage range

   Overload Protection (OLP) with auto-recovery 

   Over Temperature Protection (OTP) with auto-recovery

   VDD Over voltage Protection(OVP) with auto-recovery

   • Adjustable OVP through external Zener

PIN CONFIGUTION
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