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onsemi NCP1377BD1R2G product image
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onsemi NCP1377BD1R2GRoHS

Manufacturer
onsemi
MPN
NCP1377BD1R2G
LCSC Part #
C463576
Packaging
SOIC-7
Customer #
Key Attributes
PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation
Datasheetpdf icononsemi NCP1377BD1R2G
In-Stock: 2,281
2,281 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 1.0849$ 1.08
10+$ 0.9874$ 9.87
30+$ 0.9338$ 28.01
100+$ 0.7292$ 72.92
500+$ 0.7016$ 350.80
1,000+$ 0.6902$ 690.20
Standard Packaging2500/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/AC DC Converters, Offline Switchers
Manufactureronsemi
PackagingSOIC-7
Operating Temperature-40℃~+125℃
Frequency - Switching300kHz
Output Current500mA
Pd - Power Dissipation-
Voltage - Breakdown500V
Voltage - Supply7.5V~12.5V
TopologyFlyback
FeaturesQuasi-resonant/valley switching;Light load efficient mode;Leading edge blanking;Under-voltage lockout;High voltage direct start;Over Voltage Protection;Short Circuit Protection;Soft-start;Overtemperature protection (OTP)
Output Voltage-
Duty Cycle(Max)-
Feedback SystemSecondary-Side Feedback
Working ModeCRM;QR
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging2500
Sales UnitPiece

Introduction

AI Translation

The NCP1377 combines a true current mode modulator and a demagnetization detector which ensures full borderline/critical Conduction Mode in any load/line conditions together with minimum drain voltage switching (Quasi- Resonant operation). Due to its inherent skip cycle capability, the controller enters burst mode as soon as the power demand falls below a predetermined level. As this happens at low peak current, no audible noise can be heard. For NCP1377, an internal 8.0 μs timer prevents the free- run frequency to exceed 100 kHz (therefore below the 150 kHz CISPR- 22 EMI starting limit), while the skip adjustment capability lets the user select the frequency at which the burst foldback takes place. For NC1377B, the internal timer duration is reduced to 3.0 μs to allow operation at higher frequencies (up to 300 kHz). The transformer core reset detection is done through an auxiliary winding which, brought via a dedicated pin, also enables fast Over Voltage Protection (OVP). Once an OVP has been detected, the IC permanently latches off. The 1377 features a sampling time of 4.5 μs whereas it is 1.5 μs for the B version. The NCP1377 also features an efficient protective circuitries which, in presence of an overcurrent condition, disables the output pulses and enters a safe burst mode, trying to restart. Once the default has gone, the device auto- recovers. Finally an internal 1.0 ms Soft- Start eliminates the traditional startup stress.

Features

AI Translation
  • Free- Running Borderline/Critical Mode Quasi- Resonant Operation
  • Latched Overvoltage Protection
  • Auto- Recovery Short- Circuit Protection Via UVLO Crossover
  • External Latch Triggering, e.g. Via Overtime Signal
  • Current- Mode with Adjustable Skip Cycle Capability
  • Internal 1.0 ms Soft- Start
  • Internal Temperature Shutdown
  • Internal Leading Edge Blanking
  • 500 mA Peak Current Source/Sink Capability
  • Under Voltage Lockout Level of 12.5 V (On) and 7.5 V (Min)
  • Direct Optocoupler Connection
  • SPICE Models Available for TRANSient Analysis
  • Internal Minimum ToFF
  • These Devices are Pb- Free, Halogen Free/BFR Free and are RoHS Compliant

Applications

AI Translation
  • AC- DC Adapters for Notebooks, etc.
  • Offline Battery Chargers
  • Consumer Electronics (DVD Players, Set- Top Boxes, TVs, etc.)
  • Auxiliary Power Supplies (USB, Appliances, TVs, etc.)