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Onsemi NCP1342 | Demoboard NCP1342PD90WGEVB
NCP1342: Quasi-Resonant Flyback Controller with Valley Lock-Out Switching
Overview
| Topology | Flyback Converter |
| Input voltage | 90-264 V |
| Output 1 | 20 V / 4.5 A |
| 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 | VR(V (AC)) | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Pitch(mm) | L(mm) | W(mm) | H(mm) | Packaging | Tol. C | Size | Qmin. | DF(%) | Ceramic Type | Fl(mm) | Operating Temperature | Q(%) | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(Ω) | Type | VRMS(V) | VDC(V) | VBR(V) | IPeak(A) | Wmax(J) | PDiss(W) | VDE Approval | L(µH) | IR(mA) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-VD Disk Varistor, 230 VAC, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-VD Disk Varistor | – | – | – | – | – | – | – | Length9 mm | Width4.1 mm | Height12.5 mm | – | – | Size7 mm | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | AC Operating Voltage300 V | DC Operating Voltage385 V | (Reverse) Breakdown Voltage470 V | (Reverse) Peak Pulse Current1200 A | Energy Absorption35 J | Power Dissipation0.25 W | VDE ApprovalYes | – | – | ||||
 | WCAP-FTX2 Film Capacitors, Across the mains, 220 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTX2 Film Capacitors | Capacitance220 nF | Rated Voltage275 V (AC) | Safety ClassX2 | Rate of Voltage Rise240 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch12.5 mm | Length15 mm | Width7 mm | Height12.5 mm | PackagingBulk | Capacitance±10% | SizePitch 12.5 mm | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | Length3.2 mm | Width1.6 mm | Height1.1 mm | – | – | Size1206 | – | – | – | Pad Dimension0.5 mm | Operating Temperature -55 °C up to +125 °C | – | Impedance @ 100 MHz300 Ω | Maximum Impedance330 Ω | Maximum Impedance110 MHz | Rated Current 23000 mA | DC Resistance0.06 Ω | TypeHigh Current | – | – | – | – | – | – | – | – | Rated Current1500 mA | ||||
| WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | Length3.2 mm | Width1.6 mm | Height1.1 mm | – | – | Size1206 | – | – | – | Pad Dimension0.5 mm | Operating Temperature -55 °C up to +125 °C | – | Impedance @ 100 MHz600 Ω | Maximum Impedance700 Ω | Maximum Impedance90 MHz | Rated Current 22000 mA | DC Resistance0.1 Ω | TypeHigh Current | – | – | – | – | – | – | – | – | Rated Current1200 mA | ||||
 | WE-FI Leaded Toroidal Line Choke, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FI Leaded Toroidal Line Choke | – | – | – | – | – | – | – | Length16.5 mm | Width9.7 mm | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | DC Resistance0.08 Ω | – | – | – | – | – | – | – | – | Inductance100 µH | Rated Current2500 mA | |||
| WCAP-CSGP MLCCs 50 V(DC), –, 10 pF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance10 pF | Rated Voltage50 V (AC) | – | – | – | Insulation Resistance10 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±5% | Size0603 | – | – | Ceramic TypeNP0 Class I | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +125 °C | Q-Factor600 % | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, 68 pF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance68 pF | Rated Voltage50 V (AC) | – | – | – | Insulation Resistance10 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±5% | Size0603 | – | – | Ceramic TypeNP0 Class I | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +125 °C | Q-Factor1000 % | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), –, 1 µF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Capacitance1 µF | Rated Voltage25 V (AC) | – | – | – | Insulation Resistance0.5 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Q-Factor [1]600 | Dissipation Factor10 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, 100 pF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance100 pF | Rated Voltage50 V (AC) | – | – | – | Insulation Resistance10 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Q-Factor [1]600 | Dissipation Factor2.5 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, 330 pF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance330 pF | Rated Voltage50 V (AC) | – | – | – | Insulation Resistance10 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Q-Factor [1]600 | Dissipation Factor2.5 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, 1 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance1 nF | Rated Voltage50 V (AC) | – | – | – | Insulation Resistance10 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Q-Factor [1]600 | Dissipation Factor2.5 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, 2.2 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance2.2 nF | Rated Voltage50 V (AC) | – | – | – | Insulation Resistance10 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Q-Factor [1]600 | Dissipation Factor2.5 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, 10 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance10 nF | Rated Voltage50 V (AC) | – | – | – | Insulation Resistance10 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Q-Factor [1]600 | Dissipation Factor2.5 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, 68 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance68 nF | Rated Voltage50 V (AC) | – | – | – | Insulation Resistance7.4 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Q-Factor [1]600 | Dissipation Factor3 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, 100 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance100 nF | Rated Voltage50 V (AC) | – | – | – | Insulation Resistance5 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Q-Factor [1]600 | Dissipation Factor3 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 16 V(DC), –, 2.2 µF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 16 V(DC) | Capacitance2.2 µF | Rated Voltage16 V (AC) | – | – | – | Insulation Resistance0.05 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±20% | Size0603 | Q-Factor [1]600 | Dissipation Factor10 % | Ceramic TypeX5R Class II | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), –, 220 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Capacitance220 nF | Rated Voltage25 V (AC) | – | – | – | Insulation Resistance2.3 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | Capacitance±20% | Size0603 | Q-Factor [1]600 | Dissipation Factor3.5 % | Ceramic TypeX5R Class II | Pad Dimension0.4 mm | Operating Temperature -55 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WCAP-CSMH Mid and High Voltage, –, 2.2 nF | Downloads8 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSMH Mid and High Voltage | Capacitance2.2 nF | Rated Voltage1000 V (AC) | – | – | – | Insulation Resistance10 GΩ | – | Length2 mm | Width1.25 mm | Height1.25 mm | Packaging7" Tape & Reel | Capacitance±10% | Size0805 | – | Dissipation Factor2.5 % | Ceramic TypeX7R Class II | Pad Dimension0.5 mm | Operating Temperature -55 °C up to +125 °C | Q-Factor600 % | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||
750343888 | PFC Inductor, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series PFC Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |