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Overview
| Topology | LLC Resonant Converter |
| Input voltage | 90-264 V |
| Output 1 | 250 V / 16 A |
| IC revision | 0.9 |
Description
The NCV3843BV is a high performance fixed frequency current mode controller. They are specifically designed for Off−Line and DC−DC converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle−by−cycle current limiting, programmable output deadtime, and a latch for single pulse metering. These devices are available in a surface mount (SOIC−8) plastic package as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14 package has separate power and ground pins for the totem pole output stage. The NCV3843BV is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
Features
- Trimmed Oscillator for Precise Frequency Control
- Oscillator Frequency Guaranteed at 250 kHz
- Current Mode Operation to 500 kHz
- Automatic Feed Forward Compensation
- Latching PWM for Cycle−By−Cycle Current Limiting
- Internally Trimmed Reference with Undervoltage Lockout
- High Current Totem Pole Output
- Undervoltage Lockout with Hysteresis
- Low Startup and Operating Current
- These are Pb−Free Devices
Typical applications
- Power Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | PCB/Cable/Panel | Modularity | Type | Wire Section | ISAT(A) | fres(MHz) | 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) | SW(mm) | Ti | To | Endurance(h) | IRIPPLE(mA) | ILeak(µA) | Ø D(mm) | G(mm) | Working Voltage(V (AC)) | 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-PDA SMT Shielded Power Inductor, 2, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PDA SMT Shielded Power Inductor | Pins2 | – | – | – | – | Saturation Current1.6 A | Self Resonant Frequency17.2 MHz | – | – | – | – | – | – | – | – | Size7332 | Operating Temperature -40 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Current1.55 A | Inductance22 µH | DC Resistance187 mΩ | – | – | – | Length7.3 mm | Width7.3 mm | Height3.2 mm | MountSMT | – | – | – | – | – | – | – | ||||
 | WR-TBL Series 101 - 5.00 mm Horizontal Entry Modular, 2, Wire Protector | Simulation– | 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 | – | – | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | – | – | – | Working Voltage250 V (AC) | Rated Current16 A | – | – | – | – | – | Length10 mm | – | Height12.6 mm | MountTHT | – | – | – | – | – | – | VDE Approval40022614 | |||
 | WE-CMBNC Common Mode Power Line Choke Nanocrystalline, 4, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMBNC Common Mode Power Line Choke Nanocrystalline | Pins4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | SizeXXL | Operating Temperature -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | Pin length5 mm | – | Rated Current38 A | Inductance1500 µH | DC Resistance2.3 mΩ | Rated Voltage300 V (AC) | Insulation Test Voltage2100 V (AC) | MaterialNanocrystalline | Length48 mm | Width27.5 mm | Height46 mm | MountTHT | – | – | – | – | – | – | VDE Approval40048238 | ||||
 | WR-PHD Socket Header - Dual, 4, – | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Socket Header - Dual | Pins4 | – | – | TypeStraight | – | – | – | – | – | – | – | Insulation Resistance1000 MΩ | Pitch2.54 mm | PackagingTray | – | – | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | – | – | – | Working Voltage250 V (AC) | Rated Current3 A | – | – | – | – | – | Length5.58 mm | – | – | MountTHT | – | – | – | – | – | – | – | ||
 | WR-PHD Socket Header - Dual, 10, – | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Socket Header - Dual | Pins10 | – | – | TypeStraight | – | – | – | – | – | – | – | Insulation Resistance1000 MΩ | Pitch2.54 mm | PackagingTray | – | – | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | – | – | – | Working Voltage250 V (AC) | Rated Current3 A | – | – | – | – | – | Length13.2 mm | – | – | MountTHT | – | – | – | – | – | – | – | ||
 | WE-VD Disk Varistor, –, 230 VAC | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-VD Disk Varistor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size20 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | – | Diameter23 mm | – | – | – | – | – | – | – | – | Length23 mm | Width5.3 mm | Height27 mm | MountTHT | AC Operating Voltage320 V | DC Operating Voltage418 V | (Reverse) Breakdown Voltage510 V | (Reverse) Peak Pulse Current10000 A | Energy Absorption382 J | Power Dissipation1 W | VDE ApprovalYes | ||||
 | WCAP-FTX2 Film Capacitors, –, Across the mains | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTX2 Film Capacitors | – | – | – | – | – | – | – | Capacitance2.2 µF | Safety ClassX2 | Rate of Voltage Rise170 V/µs | Dissipation Factor0.1 % | Insulation Resistance4.55 GΩ | Pitch22.5 mm | PackagingCarton | Capacitance±10% | SizePitch 22.5 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | – | – | Pin length4 mm | – | – | – | – | Rated Voltage275 V (AC) | – | – | Length26 mm | Width15 mm | Height25 mm | MountBoxed THT | – | – | – | – | – | – | – | ||||
 | WCAP-ATG5 Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATG5 Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | Capacitance150 µF | – | – | – | – | Pitch2.5 mm | PackagingAmmopack | Capacitance±20% | – | – | – | Dissipation Factor14 % | – | – | – | – | – | Endurance 2000 | Ripple Current180 mA | Leakage Current37.5 µA | Diameter6.3 mm | – | – | – | – | – | Rated Voltage25 V (AC) | – | – | Length11 mm | – | – | – | – | – | – | – | – | – | – | ||||
 | WCAP-ATLI Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATLI Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | Capacitance220 µF | – | – | – | – | Pitch3.5 mm | PackagingAmmopack | Capacitance±20% | – | – | – | Dissipation Factor9 % | – | – | – | – | – | Endurance 3000 | Ripple Current1000 mA | Leakage Current77 µA | Diameter8 mm | – | – | – | – | – | Rated Voltage35 V (AC) | – | – | Length16 mm | – | – | – | – | – | – | – | – | – | – | ||||
| WCAP-ATLI Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATLI Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | Capacitance560 µF | – | – | – | – | Pitch5 mm | PackagingAmmopack | Capacitance±20% | – | – | – | Dissipation Factor10 % | – | – | – | – | – | Endurance 5000 | Ripple Current1450 mA | Leakage Current140 µA | Diameter10 mm | – | – | – | – | – | Rated Voltage25 V (AC) | – | – | Length20 mm | – | – | – | – | – | – | – | – | – | – | ||||
 | WCAP-ATLL Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATLL Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | Capacitance22 µF | – | – | – | – | Pitch2 mm | PackagingAmmopack | Capacitance±20% | – | – | – | Dissipation Factor12 % | – | – | – | – | – | Endurance 4000 | Ripple Current162 mA | Leakage Current7.7 µA | Diameter5 mm | – | – | – | – | – | Rated Voltage35 V (AC) | – | – | Length11 mm | – | – | – | – | – | – | – | – | – | – | ||||
 | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-AI3H Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | Capacitance680 µF | – | – | – | – | Pitch10 mm | PackagingTray | Capacitance±20% | Size35.0 x 55.0 | Operating Temperature -25 °C up to +105 °C | – | Dissipation Factor20 % | – | – | – | – | – | Endurance 3000 | Ripple Current2200 mA | Leakage Current1659.52 µA | Diameter35 mm | – | – | – | – | – | Rated Voltage450 V (AC) | – | – | Length57 mm | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | Capacitance100 pF | – | – | – | Insulation Resistance10 GΩ | – | Packaging7" Tape & Reel | Capacitance±5% | Size0805 | Operating Temperature -55 °C up to +125 °C | Q-Factor1000 % | – | Ceramic TypeNP0 Class I | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage50 V (AC) | – | – | Length2 mm | Width1.25 mm | Height0.6 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | Capacitance100 nF | – | – | – | Insulation Resistance5 GΩ | – | Packaging7" Tape & Reel | Capacitance±10% | Size0805 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor3.5 % | Ceramic TypeX7R Class II | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage25 V (AC) | – | – | Length2 mm | Width1.25 mm | Height0.8 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | Capacitance2.2 µF | – | – | – | Insulation Resistance0.05 GΩ | – | Packaging7" Tape & Reel | Capacitance±10% | Size0805 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Ceramic TypeX7R Class II | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage25 V (AC) | – | – | Length2 mm | Width1.25 mm | Height1.25 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | 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% | Size0805 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor2.5 % | Ceramic TypeX7R Class II | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage50 V (AC) | – | – | Length2 mm | Width1.25 mm | Height0.8 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | Capacitance2.2 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 Voltage50 V (AC) | – | – | Length2 mm | Width1.25 mm | Height0.8 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | Capacitance10 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 Voltage50 V (AC) | – | – | Length2 mm | Width1.25 mm | Height0.8 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | Capacitance1 µF | – | – | – | Insulation Resistance0.1 GΩ | – | Packaging7" Tape & Reel | Capacitance±10% | Size0805 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Ceramic TypeX7R Class II | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage50 V (AC) | – | – | Length2 mm | Width1.25 mm | Height1.25 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | Capacitance10 µF | – | – | – | Insulation Resistance0.01 GΩ | – | Packaging7" Tape & Reel | Capacitance±10% | Size1206 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Ceramic TypeX7R Class II | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage25 V (AC) | – | – | Length3.2 mm | Width1.6 mm | Height1.6 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | Capacitance4.7 µF | – | – | – | Insulation Resistance0.02 GΩ | – | Packaging7" Tape & Reel | Capacitance±10% | Size1206 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Ceramic TypeX7R Class II | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage50 V (AC) | – | – | Length3.2 mm | Width1.6 mm | Height1.6 mm | – | – | – | – | – | – | – | – | |||||
 | WA-SPAIE Plastic Spacer Stud, metric, internal/ external, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SPAIE Plastic Spacer Stud, metric, internal/ external | – | – | – | – | – | – | – | – | – | – | – | – | – | PackagingBag | – | – | Operating Temperature -30 °C up to +110 °C | – | – | – | – | SW6 mm | Inner ThreadM3 | Outer ThreadM3 | – | – | – | – | – | – | – | – | – | – | – | MaterialPolyamide | Length8 mm | – | – | – | – | – | – | – | – | – | – | |||
 | WA-SBRIE Brass Spacer Stud, metric, internal/external, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SBRIE Brass Spacer Stud, metric, internal/external | – | – | – | – | – | – | – | – | – | – | – | – | – | PackagingCarton | – | – | Operating Temperature -55 °C up to +150 °C | – | – | – | – | SW5.5 mm | Inner ThreadM3 | Outer ThreadM3 | – | – | – | – | – | – | – | – | – | – | – | MaterialBrass | Length8 mm | – | – | – | – | – | – | – | – | – | – |