IC Phoenix
 
Home ›  NN5 > NCP1377-NCP1377BP-NCP1377P,QR SMPS controller
NCP1377-NCP1377BP-NCP1377P Fast Delivery,Good Price
Part Number:
If you need More Quantity or Better Price,Welcom Any inquiry.
We available via phone +865332716050 Email
Partno Mfg Dc Qty AvailableDescript
NCP1377ONN/a22avaiQR SMPS controller
NCP1377BPONN/a200avaiQR SMPS controller
NCP1377PONN/a775avaiQR SMPS controller


NCP1377P ,QR SMPS controllerConduction Mode in any load/line conditions together withminimum drain voltage switching (Quasi−Res ..
NCP1378DR2G , PWM Current−Mode Controller for Free−Running Quasi−Resonant Operation
NCP1380BDR2G , Quasi-Resonant Current-Mode Controller for High-Power Universal Off-Line Supplies
NCP1380DDR2G , Quasi-Resonant Current-Mode Controller for High-Power Universal Off-Line Supplies
NCP1393BDR2G , High-Voltage Half-Bridge Driver with Inbuilt Oscillator
NCP1400ASN27T1 ,100mA, Fixed Frequency PWM Step-Up Micropower Switching RegulatorELECTRICAL CHARACTERISTICS (continued) (For all values T = 25°C, unless otherwise noted.)ACharacter ..
NJM2742RB1 , HIGH SPEED SINGLE SUPPLY OPERATIONAL AMPLIFIER
NJM2746RB1 , Single Supply Dual Operational Amplifier with Full Swing Output
NJM2747V , Single Supply Quad Operational Amplifier with Full Swing Output
NJM2760 , Band Pass Filter for Spectrum Analyzer Display
NJM2760V , Band Pass Filter for Spectrum Analyzer Display
NJM2768M , HAEDPHONE AMPLIFIER for CD-ROM


NCP1377-NCP1377BP-NCP1377P
QR SMPS controller
NCP1377, NCP1377B
PWM Current-Mode
Controller for Free-Running
Quasi-Resonant Operation
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 �s 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 �s 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 �s whereas it is 1.5 �s 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
Pb−Free Packages are Available 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 Overtemperature 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
Typical Applications
AC−DC Adapters for Notebooks, etc. Offline Battery Chargers
ic,good price


TEL:86-533-2716050      FAX:86-533-2716790
   

©2020 IC PHOENIX CO.,LIMITED