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Overview
| Topology | Flyback Converter |
| Input voltage | 90-264 V |
| Switching frequency | 25 kHz |
| Output 1 | 12 V / 3 A |
Description
This design note describes a 45 W, Type C interface PD3.0, universal AC input, constant voltage power supply intended for smart phone, PAD and NB adaptor supporting PD3.0 or QC3.0 protocol, where isolation from the AC mains is required, and low cost, high efficiency, and low standby power are essential. The featured power supply is a simple QR flyback topology utilizing ON Semiconductor’s NCP1342 HF PWM controller, NCP4306D synchronous rectified controller, NTMFS6B03 synchronous MOSFET and ATP104 Switch MOSFET. This Design Note provides the complete circuit schematic details, PCB and BOM for 45 W Type C Interface PD3.0 Power adapter solution which supports PD output (5 V / 3 A, 9 V / 3 A, 12 V / 3 A, 15 V / 3 A, 20 V / 2.25 A). This design combined with Weltrend WT6632F PD3.0 protocol controller to provide PD3.0 and QC3.0 functions. This design also proposes a dual auxiliary power supply to supply PWM controller, the PWM controller is supplied by high voltage auxiliary voltage at low output voltage and supplied by low voltage auxiliary voltage at high output voltage and also shuts down zener bias of high voltage Vcc while low voltage auxiliary voltage supplies controller. This design also uses NCP4306 synchronous rectified controller to provide high efficiency and also has no external Vcc regulator to supply synchronous controller to ensure controller can works below 3.6 V.
Features
- Integrated High−Voltage Startup Circuit with Brownout Detection
- Integrated X2 Capacitor Discharge Capability
- Wide VCC Range from 9 V to 28 V
- 28 V VCC Overvoltage Protection
- Abnormal Overcurrent Fault Protection for Winding Short Circuit or Saturation Detection
- Internal Temperature Shutdown
- Valley Switching Operation with Valley−Lockout for Noise−Free Operation
- Frequency Foldback with 25 kHz Minimum Frequency Clamp for Increased Efficiency at Light Loads
- Rapid Frequency Foldback for Fast Reduction of SwitchingFrequency at Light Loads
- Skip Mode with Quiet−Skip Technology for Highest Performance During Light Loads
- Minimized Current Consumption for No Load Power Below 30 mW
- Frequency Jittering for Reduced EMI Signature
- Latching or Auto−Recovery Timer−Based Overload Protection
- Adjustable Overpower Protection (OPP)
- Adjustable Maximum Frequency Clamp
- Fault Pin for Severe Fault Conditions, NTC Compatible for OTP
- 4 ms Soft−Start Timer
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 | Pitch(mm) | Packaging | Tol. C | Size | Operating Temperature | Q(%) | DF(%) | Ceramic Type | Fl(mm) | ISAT,10%(A) | fres(MHz) | Version | Interface Type | Gender | Pins | PCB Thickness(mm) | Working Voltage(V (DC)) | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(Ω) | Type | IR(A) | L(mH) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | VRMS(V) | VDC(V) | VBR(V) | IPeak(A) | Wmax(J) | PDiss(W) | VDE Approval | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-VD Disk Varistor, 230 VAC, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-VD Disk Varistor | – | – | – | – | – | – | – | – | Size7 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | VersionTHT | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Length9 mm | Width4.1 mm | Height12.5 mm | MountTHT | 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 | Safety ClassX2 | Rate of Voltage Rise300 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch10 mm | PackagingBulk | Capacitance±10% | SizePitch 10 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage275 V (AC) | – | – | Length13 mm | Width8 mm | Height14 mm | MountBoxed THT | – | – | – | – | – | – | – | ||||
 | WR-USB Type C Connectors, USB 3.1, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-USB Type C Connectors | – | – | – | – | Insulation Resistance1000 MΩ | – | PackagingTape and Reel | – | – | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | Interface TypeType C | GenderReceptacle | Pins24 | PCB Thickness1.6 mm | Working Voltage48 V (DC) | – | – | – | – | – | TypeHorizontal | Rated Current5 A | – | – | – | – | – | – | – | MountTHR | – | – | – | – | – | – | – | |||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | – | Size0805 | Operating Temperature -55 °C up to +125 °C | – | – | – | Pad Dimension0.5 mm | – | – | VersionSMT | – | – | – | – | – | Impedance @ 100 MHz600 Ω | Maximum Impedance700 Ω | Maximum Impedance150 MHz | Rated Current 22000 mA | DC Resistance0.15 Ω | TypeHigh Current | Rated Current1.5 A | – | – | – | – | Length2 mm | Width1.2 mm | Height0.0009 mm | MountSMT | – | – | – | – | – | – | – | ||||
| WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | – | Size0805 | Operating Temperature -55 °C up to +125 °C | – | – | – | Pad Dimension0.5 mm | – | – | VersionSMT | – | – | – | – | – | Impedance @ 100 MHz1000 Ω | Maximum Impedance1000 Ω | Maximum Impedance100 MHz | Rated Current 21000 mA | DC Resistance0.3 Ω | TypeHigh Current | Rated Current0.8 A | – | – | – | – | Length2 mm | Width1.2 mm | Height0.9 mm | MountSMT | – | – | – | – | – | – | – | ||||
 | WE-CMB Common Mode Power Line Choke, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMB Common Mode Power Line Choke | – | – | – | – | – | – | – | – | SizeXS | Operating Temperature -40 °C up to +125 °C | – | – | – | – | – | – | VersionTHT | – | – | Pins4 | – | – | – | – | – | – | DC Resistance0.35 Ω | – | Rated Current0.7 A | Inductance10 mH | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialMnZn | Length15 mm | Width7.5 mm | Height18 mm | MountTHT | – | – | – | – | – | – | VDE Approval40042670 | ||||
 | WE-TI Radial Leaded Wire Wound Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | – | – | – | Size5075 | Operating Temperature -40 °C up to +125 °C | – | – | – | – | Saturation Current @ 10%1.2 A | Self Resonant Frequency10.6 MHz | VersionHeat Shrinking Tube | – | – | – | – | – | – | – | – | – | DC Resistance0.34 Ω | – | Rated Current1.18 A | Inductance0.047 mH | – | – | MaterialNiZn | Length6 mm | Width6 mm | Height8.5 mm | MountTHT | – | – | – | – | – | – | – | ||||
| 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 | – | – | – | Insulation Resistance10 GΩ | – | Packaging7" Tape & Reel | Capacitance±5% | Size0603 | Operating Temperature -55 °C up to +125 °C | Q-Factor600 % | – | Ceramic TypeNP0 Class I | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage50 V (AC) | – | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | – | – | – | – | – | – | – | – | |||||
| 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 | – | – | – | Insulation Resistance10 GΩ | – | Packaging7" Tape & Reel | Capacitance±5% | Size0603 | Operating Temperature -55 °C up to +125 °C | Q-Factor1000 % | – | Ceramic TypeNP0 Class I | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage50 V (AC) | – | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | – | – | – | – | – | – | – | – | |||||
| 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 | – | – | – | Insulation Resistance0.5 GΩ | – | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage25 V (AC) | – | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | – | – | – | – | – | – | – | – | |||||
| 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 | – | – | – | Insulation Resistance10 GΩ | – | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor2.5 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage50 V (AC) | – | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | – | – | – | – | – | – | – | – | |||||
| 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 | – | – | – | Insulation Resistance7.4 GΩ | – | Packaging7" Tape & Reel | Capacitance±10% | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor3 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage50 V (AC) | – | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 100 V(DC), –, 1 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 100 V(DC) | Capacitance1 nF | – | – | – | Insulation Resistance10 GΩ | – | Packaging7" Tape & Reel | Capacitance±10% | Size0805 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor2.5 % | Ceramic TypeX7R Class II | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage100 V (AC) | – | – | Length2 mm | Width1.25 mm | Height0.8 mm | – | – | – | – | – | – | – | – |