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Overview
| Topology | Flyback Converter |
| Input voltage | 85-265 V |
| Output 1 | 12 V / 0.6 A |
Description
The varistor R4 together with resistor R3 form simple protection that enhances application robustness against line over−voltage and voltage spikes. Resistor R3 also limits theinrush current when the power supply is connected to mains.The EMC filter is implemented to reduce conducted electromagnetic emissions to the mains.The Flyback converter itself is formed by the high voltage switching regulator IC1, transformer TR1, freewheeling diode D3 and coil L1 (L3). Capacitors C5, C6, C7 and C8 areused as the output filtering and energy storage bank. Resistor R1 and capacitor C2 for filter, C1, R2 and D2 are forming voltage clamp for the switcher drain. Opto−coupler OK1(NCP431) is used in feedback network. Resistors R8, R12 and R13 form resistive divider and sets output voltage. Diode D7 and resistor R14 provide supply voltage for IC1Vcc from auxiliary winding. The capacitor C10 is the energy storage element that keeps IC1 powered during light load conditions, when the switching frequency drops and energyfrom auxiliary winding refills Vcc capacitors less often. Pin LIM/OPP is connected through resistor R6 to auxiliary winding and sets over−power protection. Resistor R9 decreases maximal peak current. The frequencycompensation of the feedback loop system is ensured by external capacitor C8 that is connected to the IC OTA output.
Features
- Universal AC Input Range (85 – 265 Vac)
- Input Filter for Conducted EMI Attenuation
- Very Low Standby and No−load Power Consumption
- Frequency Fold−back for Improved Efficiency at Light Load
- Inherent Over−current, Over−voltage andOver−temperature Protections
- Frequency Jittering for Better EMI Signature
- Adjustable Peak Current to Set the Required Level of Over−current Protection
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | PCB/Cable/Panel | Modularity | Type | Wire Section | C | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Pitch(mm) | Packaging | ISAT(A) | fres(MHz) | Endurance(h) | IRIPPLE(mA) | ILeak(µA) | DF(%) | Ø D(mm) | RESR(mΩ) | VIN | VOut1(V) | IOut1(mA) | VOut2(V) | IOut2(mA) | Vaux(V) | fswitch(kHz) | NPRI : NSEC : NAUX | Size | IR(A) | L(µH) | RDC max.(mΩ) | 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-TPC SMT Tiny Power Inductor, 2, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Pins2 | – | – | – | – | – | – | – | – | – | – | – | Saturation Current2.4 A | Self Resonant Frequency130 MHz | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size2828 | Rated Current1.8 A | Inductance2.2 µH | DC Resistance66 mΩ | – | – | – | Length2.8 mm | Width2.8 mm | Height2.8 mm | MountSMT | – | – | – | – | – | – | – | ||||
 | WR-TBL Series 101 - 5.00 mm Horizontal Entry Modular, 2, Wire Protector | Simulation– | Downloads6 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-TBL Series 101 - 5.00 mm Horizontal Entry Modular | Pins2 | PCB/Cable/PanelPCB | ModularityYes | TypeHorizontal | Wire Section 26 to 14 (AWG) 0.5 to 2.5 (mm²) | – | – | – | – | – | Pitch5 mm | PackagingBox | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Current16 A | – | – | – | – | – | Length10 mm | – | Height12.6 mm | MountTHT | – | – | – | – | – | – | VDE Approval40022614 | ||
 | WE-TFC Common Mode Power Line Choke, 4, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TFC Common Mode Power Line Choke | Pins4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | SizeUU 9.8 V | Rated Current0.4 A | Inductance12000 µH | DC Resistance2000 mΩ | Rated Voltage300 V (AC) | Insulation Test Voltage2500 V (AC) | MaterialMnZn | Length17 mm | Width11.5 mm | Height17 mm | MountTHT | – | – | – | – | – | – | – | ||||
 | WE-VD Disk Varistor, –, 230 VAC | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-VD Disk Varistor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Diameter9 mm | – | – | – | – | – | – | – | – | – | Size7 mm | – | – | – | – | – | – | Length9 mm | Width3.9 mm | Height12.5 mm | MountTHT | AC Operating Voltage275 V | DC Operating Voltage350 V | (Reverse) Breakdown Voltage430 V | (Reverse) Peak Pulse Current1200 A | Energy Absorption33 J | Power Dissipation0.25 W | VDE ApprovalYes | ||||
 | WCAP-FTXX Film Capacitors, –, Across the mains | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTXX Film Capacitors | – | – | – | – | – | Capacitance68 nF | Safety ClassX2 | Rate of Voltage Rise270 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch15 mm | PackagingCarton | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | SizePitch 15 mm | – | – | – | Rated Voltage310 V (AC) | – | – | Length18 mm | Width6 mm | Height12 mm | MountBoxed THT | – | – | – | – | – | – | – | ||||
| WCAP-FTXX Film Capacitors, –, Across the mains | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTXX Film Capacitors | – | – | – | – | – | Capacitance150 nF | Safety ClassX2 | Rate of Voltage Rise210 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch15 mm | PackagingBulk | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | SizePitch 15 mm | – | – | – | Rated Voltage310 V (AC) | – | – | Length18 mm | Width6 mm | Height12 mm | MountBoxed THT | – | – | – | – | – | – | – | ||||
 | WE-TI HV Radial Leaded Wire Wound Inductor (High Voltage), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | – | – | – | – | – | – | – | – | – | – | – | – | Saturation Current0.55 A | Self Resonant Frequency1.8 MHz | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size8095 | Rated Current0.5 A | Inductance1000 µH | DC Resistance2080 mΩ | – | – | MaterialNiZn | Length7.8 mm | Width7.8 mm | Height9.5 mm | MountTHT | – | – | – | – | – | – | – | |||||
 | WCAP-ATG8 Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATG8 Aluminum Electrolytic Capacitors | – | – | – | – | – | Capacitance4.7 µF | – | – | – | – | Pitch2 mm | PackagingAmmopack | – | – | Endurance 2000 | Ripple Current44 mA | Leakage Current3 µA | Dissipation Factor12 % | Diameter5 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage35 V (AC) | – | – | Length11 mm | – | – | – | – | – | – | – | – | – | – | ||||
| WCAP-ATG8 Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATG8 Aluminum Electrolytic Capacitors | – | – | – | – | – | Capacitance10 µF | – | – | – | – | Pitch5 mm | PackagingAmmopack | – | – | Endurance 2000 | Ripple Current100 mA | Leakage Current120 µA | Dissipation Factor15 % | Diameter10 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage400 V (AC) | – | – | Length16 mm | – | – | – | – | – | – | – | – | – | – | ||||
 | WCAP-PTHR Aluminum Polymer Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-PTHR Aluminum Polymer Capacitors | – | – | – | – | – | Capacitance10 µF | – | – | – | – | Pitch2.5 mm | PackagingAmmopack | – | – | Endurance 2000 | Ripple Current2100 mA | Leakage Current100 µA | Dissipation Factor12 % | Diameter6.3 mm | ESR40 mΩ | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage35 V (AC) | – | – | Length8 mm | – | – | MountRadial THT | – | – | – | – | – | – | – | ||||
 | WCAP-PT5H Aluminum Polymer Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-PT5H Aluminum Polymer Capacitors | – | – | – | – | – | Capacitance470 µF | – | – | – | – | Pitch5 mm | PackagingAmmopack | – | – | Endurance 5000 | Ripple Current6100 mA | Leakage Current752 µA | Dissipation Factor10 % | Diameter10 mm | ESR9 mΩ | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage16 V (AC) | – | – | Length12.5 mm | – | – | MountRadial THT | – | – | – | – | – | – | – | ||||
 | WE-OLSTM Offline Flyback Transformers, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-OLSTM Offline Flyback Transformers | – | – | – | – | – | – | – | – | – | – | – | PackagingTray | Saturation Current0.44 A | – | – | – | – | – | – | – | Input Voltage 85 - 272 V (AC) | Output Voltage 112 V | Output Current 1300 mA | Output Voltage 212 V | Output Current 2300 mA | Auxiliary Voltage12 V | Switching Frequency 70 - 134 | Turns Ratio8.96:1:1:1 | SizeEE16/8/5 | – | Inductance3900 µH | – | – | Insulation Test Voltage3200 V (AC) | – | Length20.2 mm | Width24.2 mm | Height15.5 mm | MountTHT | – | – | – | – | – | – | – |