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Overview
| Topology | Flyback Converter |
| Input voltage | 85-265 V |
| Output 1 | 19 V / 3.42 A |
| IC revision | 1 |
Description
High Efficiency, <30mW Standby QR AdapterThe NCP1340 is a highly-integrated quasi-resonantflyback controller suitable for designing highperformance off-line power converters. With anintegrated active X2 capacitor discharge feature, theNCP1340 enables no-load power consumption below30 mW.The quasi-resonant operating mode features aproprietary valley-lockout circuitry ensuring stablevalley switching down the 6th valley. After the 6th valleythe controller transitions to a frequency foldback modeto reduce switching losses in lighter load conditions.As the load continues to decrease the NCP1340 willenter a Quiet-Skip™ mode to efficiently manage powerdelivery while minimizing acoustic noise.Secondary side synchronous rectification (SR) isimplemented with the NCP4305 for optimizedefficiency across all operating modes. The NCP4305features precise zero current turn off and 12 ns turn-offdelay from current sense to the driver allowing for theoptimal SR conduction period in quasi-resonant mode.Also, the light load detection (LLD) feature modulatesthe drive voltage as the load decreases and shuts downthe driver for optimal light and no-load performance.
Features
High-Voltage Startup Circuit with Active InputFilter Capacitor Discharge and BrownoutDetection for Reduced Standby Power Valley Switching Operation to 6th valley withValley-Lockout for Stable Operation Frequency Foldback with 25 kHz MinimumFrequency Clamp Quiet-Skip™ Operation for Highest Performancein Light and No-Load Minimized Current Consumption for No LoadPower Below 30 mW. Frequency Jitter for Reduced EMI Signature Adjustable Maximum Frequency Clamp Fault Input for Severe Fault Conditions, NTCCompatible (Latch and Auto-Recovery Options) Adjustable Maximum Frequency Clamp
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Pitch(mm) | Packaging | IR(A) | L(mH) | RDC max.(mΩ) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-FTXX Film Capacitors, Across the mains, 220 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTXX Film Capacitors | Capacitance220 nF | Safety ClassX2 | Rate of Voltage Rise240 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch12.5 mm | PackagingBulk | – | – | – | Rated Voltage310 V (AC) | – | – | Length15 mm | Width7 mm | Height12.5 mm | MountBoxed THT | ||||
 | WE-CMB Common Mode Power Line Choke, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMB Common Mode Power Line Choke | – | – | – | – | – | – | – | Rated Current2 A | Inductance10 mH | DC Resistance125 mΩ | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialMnZn | Length23 mm | Width13.8 mm | Height26.5 mm | MountTHT | ||||
750315170 | Flyback Transformer, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Flyback Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |