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 o 

  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 input voltage range

  Overload Protection (OLP) with auto- recovery 

  Over voltage Protection(OVP) with auto-recovery 

  Adjustable OVP through external Zener


PIN CONFIGUTION
优势替代
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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