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onsemi NCP1937B3DR2G

Manufacturer
onsemi
MPN
NCP1937B3DR2G
LCSC Part #
C904480
Packaging
SOIC-20-150mil
Customer #
Key Attributes
9V~30V SOIC-20-150mil PFC (Power Factor Correction) RoHS
Datasheetonsemi NCP1937B3DR2G
RoHS Compliance4 documents available
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement

Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/PFC (Power Factor Correction)
Manufactureronsemi
PackagingSOIC-20-150mil
Frequency - Switching-
Output Current-
FeaturesHigh voltage direct start;Brown-in/Brown-out detection;Light load efficient mode;Quasi-resonant/valley switching;Audio noise elimination;Leading edge blanking
Output Voltage-
Duty Cycle(Max)-
Feedback SystemSecondary-Side Feedback
Voltage - Supply9V~30V
Working ModeCRM;QR
Operating Temperature-40℃~+125℃
TopologyBoost;Flyback
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Introduction

AI Translation

This combination IC integrates power factor correction (PFC) and quasi−resonant flyback functionality necessary to implement a compact and highly efficient Switched Mode Power Supply for an adapter application. The PFC stage exhibits near−unity power factor while operating in a Critical Conduction Mode (CrM) with a maximum frequency clamp. The circuit incorporates all the features necessary for building a robust and compact PFC stage while minimizing the number of external components. The quasi−resonant current−mode flyback stage features a proprietary valley−lockout circuitry, ensuring stable valley switching. This system works down to the 4th valley and toggles to a frequency foldback mode with a minimum frequency clamp beyond the 4th valley to eliminate audible noise. Skip mode operation allows excellent efficiency in light load conditions while consuming very low standby power consumption.

Features

AI Translation
  • Wide VCC Range from 9 V to 30 V with Built−in Overvoltage Protection
  • High−Voltage Startup Circuit and Active Input Filter Capacitor Discharge Circuitry for Reduced Standby Power
  • Integrated High−Voltage Brown−Out Detector
  • Integrated High−Voltage Switch Disconnects PFC Feedback Resistor Divider to Reduce Standby Power
  • Fault Input for Severe Fault Conditions, NTC Compatible (Latch and Auto−Recovery Options)
  • 0.5 A / 0.8 A Source / Sink Gate Drivers
  • Internal Temperature Shutdown
  • Power Savings Mode Reduces Supply Current Consumption to 70 μA Enabling Very Low Input Power Applications
  • Critical Conduction Mode with Constant On Time Control (Voltage Mode) and Maximum Frequency Clamp
  • Accurate Overvoltage Protection
  • Bi−Level Line−Dependent Output Voltage
  • Fast Line / Load Transient Compensation
  • Boost Diode Short−Circuit Protection
  • Feed−Forward for Improved Operation across Line and Load
  • Adjustable PFC Disable Threshold Based on Output Power
  • Valley Switching Operation with Valley− Lockout for Noise−Free Operation
  • Frequency Foldback with Minimum Frequency Clamp for Highest Performance in Standby Mode
  • Minimum Frequency Clamp Eliminates Audible Noise
  • Timer−Based Overload Protection (Latched or Auto−Recovery options)
  • Adjustable Overpower Protection
  • Winding and Output Diode Short−Circuit Protection
  • 4 ms Soft−Start Timer