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Onsemi NCP1342 | Demoboard NCP1342PD45WGEVB
NCP1342: Quasi-Resonant Flyback Controller with Valley Lock-Out Switching
Overview
| Topology | Flyback Converter |
| Input voltage | 90-264 V |
| IC revision | A |
Description
The NCP1342 is a highly integrated quasi-resonant flyback controller suitable for designing high-performance off-line power converters. With an integrated active X2 capacitor discharge feature, the NCP1342 can enable no-load power consumption below 30 mW.The NCP1342 features proprietary valley-lockout circuitry, ensuring stable valley switching. This system works down to the 6th valley and transitions to frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1342 enters quiet-skip mode to manage the power delivery while minimizing acoustic noise.To ensure light load performance with high frequency designs, the NCP1342 incorporates Minimum Peak Current Modulation (MPCM) to reduce the switching frequency quickly. To help ensure converter ruggedness, the NCP1342 implements several key protective features such as internal brownout detection, a non-dissipative Over Power Protection (OPP) for constant maximum output power regardless of input voltage, a latched overvoltage and NTC-ready overtemperature protection through a dedicated pin, and line removal detection to safely discharge the X2 capacitors when the ac line is removed.
Features
- Minimum Peak Current Modulation for Rapid Frequency Foldback (RFF)
- QR Frequency Jittering
- Quiet-Skip Technology
- Integrated HV Startup with Brownout Protection
- Valley Switching Operaton with Valley Lockout
- Integrated X2 Capacitor Discharge Capability
- NTC Compatible Fault Pin
- High Drive Capability: -500 mA / +800 mA
- Latch input for OVP and OTP implementation
Typical applications
- Medium or High Power AC-DC Adapters, Ultra High Density AC-DC Adapters, USB PD Compliant
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | Packaging | Tol. C | Size | Operating Temperature | Q | DF (%) | Ceramic Type | Fl (mm) | ISAT (A) | fres (MHz) | Version | Interface Type | Gender | Pins (Value) (pcs) | IR (mA) | Working Voltage (V (DC)) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | IR (mA) | L (mH) | VR (V (DC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | VRMS (V) | VDC (V) | VBR (V) | IPeak (A) | Wmax (J) | PDiss (W) | Application | VDE Approval | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 885012006051 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 10 pF | – | – | – | 10 GΩ | – | – | 7" Tape & Reel | ±5% | 0603 | -55 °C up to +125 °C | 600 | – | NP0 Class I | 0.4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | 1.6 | 0.8 | 0.8 | – | – | – | – | – | – | – | – | – | ||
| 885012006056 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 68 pF | – | – | – | 10 GΩ | – | – | 7" Tape & Reel | ±5% | 0603 | -55 °C up to +125 °C | 1000 | – | NP0 Class I | 0.4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | 1.6 | 0.8 | 0.8 | – | – | – | – | – | – | – | – | – | ||
| 885012206083 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 1 nF | – | – | – | 10 GΩ | – | – | 7" Tape & Reel | ±10% | 0603 | -55 °C up to +125 °C | – | 2.5 | X7R Class II | 0.4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | 1.6 | 0.8 | 0.8 | – | – | – | – | – | – | – | – | – | ||
| 885012207116 | SPEC | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 100 V(DC) | 1 nF | – | – | – | 10 GΩ | -55 °C up to +125 °C | – | 7" Tape & Reel | ±10% | 0805 | -55 °C up to +125 °C | – | 2.5 | X7R Class II | 0.5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 100 | – | – | 2 | 1.25 | 0.8 | – | – | – | – | – | – | – | – | – | ||
| 885012206094 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 68 nF | – | – | – | 7.4 GΩ | – | – | 7" Tape & Reel | ±10% | 0603 | -55 °C up to +125 °C | – | 3 | X7R Class II | 0.4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | 1.6 | 0.8 | 0.8 | – | – | – | – | – | – | – | – | – | ||
 | 890324023028 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-FTX2 Film Capacitors | 220 nF | X2 | 300 | 0.1 | 30 GΩ | -40 °C up to +105 °C | 10 | Bulk | ±10% | Pitch 10 mm | -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 275 | – | – | 13 | 8 | 14 | Boxed THT | – | – | – | – | – | – | Across the mains | – | ||
| 885012206076 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 25 V(DC) | 1 µF | – | – | – | 0.5 GΩ | – | – | 7" Tape & Reel | ±10% | 0603 | -55 °C up to +125 °C | – | 10 | X7R Class II | 0.4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 25 | – | – | 1.6 | 0.8 | 0.8 | – | – | – | – | – | – | – | – | – | ||
 | 742792040 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | -55 °C up to +125 °C | – | – | – | 0805 | -55 °C up to +125 °C | – | – | – | 0.5 | – | – | SMT | – | – | – | 2000 | – | 600 | 700 | 150 MHz | 2000 | 0.15 | High Current | 1500 | – | – | – | – | 2 | 1.2 | 0.0009 | SMT | – | – | – | – | – | – | – | – | ||
| 742792096 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | -55 °C up to +125 °C | – | – | – | 0805 | -55 °C up to +125 °C | – | – | – | 0.5 | – | – | SMT | – | – | – | 1000 | – | 1000 | 1000 | 100 MHz | 1000 | 0.3 | High Current | 800 | – | – | – | – | 2 | 1.2 | 0.9 | SMT | – | – | – | – | – | – | – | – | ||
 | 744821110 | SPEC | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CMB Common Mode Power Line Choke | – | – | – | – | – | -40 °C up to +125 °C | – | – | – | XS | -40 °C up to +125 °C | – | – | – | – | – | – | THT | – | – | 4 | 700 | – | – | – | – | – | 0.35 | – | 700 | 10 | 250 | 1500 | MnZn | 15 | 7.5 | 18 | THT | – | – | – | – | – | – | – | 40042670 | ||
 | 820573011 | SPEC | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WE-VD Disk Varistor | – | – | – | – | – | -40 °C up to +85 °C | – | – | – | 7 mm | -40 °C up to +85 °C | – | – | – | – | – | – | THT | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 9 | 4.1 | 12.5 | THT | 300 | 385 | 470 | 1200 | 35 | 0.25 | 230 VAC | Yes | ||
 | 7447462470 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | – | – | – | – | 5075 | -40 °C up to +125 °C | – | – | – | – | 1.2 | 10.6 | Heat Shrinking Tube | – | – | – | – | – | – | – | – | – | 0.34 | – | 1180 | 0.047 | – | – | – | 6 | 6 | 8.5 | THT | – | – | – | – | – | – | – | – | ||
 | 632723300011 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-COM USB 3.1 Type C Receptacle Horizontal THR / SMT | – | – | – | – | 1000 MΩ | – | – | Tape and Reel | – | – | -40 °C up to +105 °C | – | – | – | – | – | – | – | Type C | Receptacle | 24 | – | 20 | – | – | – | – | – | Horizontal | 5000 | – | – | – | – | – | – | – | THR | – | – | – | – | – | – | USB 3.1 | – | |
 | 750343635 | SPEC | 5 files | Active i| Production is active. Expected lifetime: >10 years. | Transformer | – | – | – | – | – | – | – | Tray | – | RM8 | -40 °C up to +125 °C | – | – | – | – | 2.5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0.36 | – | 3000 | – | 21.59 | 21.59 | 17.27 | THT | – | – | – | – | – | – | – | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | Packaging | Tol. C | Size | Operating Temperature | Q | DF (%) | Ceramic Type | Fl (mm) | ISAT (A) | fres (MHz) | Version | Interface Type | Gender | Pins (Value) (pcs) | IR (mA) | Working Voltage (V (DC)) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | IR (mA) | L (mH) | VR (V (DC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | VRMS (V) | VDC (V) | VBR (V) | IPeak (A) | Wmax (J) | PDiss (W) | Application | VDE Approval | Samples |
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