onsemi NCP1339
The NCP1339 is a highly integrated quasi−resonant flyback controller capable of controlling rugged and high−performance off−line power supplies as required by adapter applications. With an integrated active X−cap discharge feature and power savings mode, the NCP1339 can enable no−load power consumption below 10 mW for 45 W notebook adapters. The quasi−resonant current−mode flyback stage features a proprietary valley−lockout circuitry, ensuring stable valley switching.| Part No. | NCP1339 |
|---|---|
| Datasheet | NCP1339 Download |
| Manufacturer |  onsemi |
| Description | QuasiResonant Controller |
| Buy | Stock & Price |
FEATURES
● High−voltage Current Source for Lossless Start−up Sequence● X2 Capacitors Discharge Capability
● Power Savings Mode (PSM) for Extremely Low No−Load Power:
● Wide VCC Range from 10 V to 28 V
● Latching−off 28−V VCC Over−Voltage Protection
● Abnormal Overcurrent Fault Protection for Winding Short Circuit or Inductor Saturation Detection
● Integrated High−Voltage Startup Circuit with Brown−Out Detection
● Fault Input for Severe Fault Conditions, NTC Compatible for OTP
● Circuit Latching Off In Severe Fault Detection (OVP or OTP)
● Internal Temperature Shutdown
● Valley Switching Operation with Valley−Lockout for Noise−Free Operation
● Frequency Fold−back for Highest Performance in Standby Mode
● 25−kHz Clamp and Skip Mode
● Timer−Based Overload Protection (Latched or Auto−Recovery Options)
● Adjustable Overpower Protection
● 4−ms Soft−Start Timer
● ZCD Blanking Time to Ignore Leakage Ringing at Turn−Off: 3 ms for C, D and E versions and 0.7 ms for F, G, H, I and J versions
● R...
