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Onsemi NCP4305D | Demoboard ONSEC-18-022
Secondary Side Synchronous Rectification Driver for High Efficiency SMPS Topologies
Overview
| Topology | Flyback Converter |
Description
The NCP4305 is high performance driver tailored to control a synchronous rectification MOSFET in switch mode power supplies. Thanks to its high performance drivers and versatility, it can be used in various topologies such as DCM or CCM flyback, quasi resonant flyback, forward, and half bridge resonant LLC.The combination of externally adjustable minimum off-time and on-time blanking periods helps to fight the ringing induced by the PCB layout and other parasitic elements. A reliable and noise less operation of the SR system is insured due to the Self Synchronization feature. The NCP4305 also utilizes Kelvin connection of the driver to the MOSFET to achieve high efficiency operation at full load and utilizes a light load detection architecture to achieve high efficiency at light load.The precise turn−off threshold, extremely low turn−off delay time and high sink current capability of the driver allow the maximum synchronous rectification MOSFET conduction time and enables maximum SMPS efficiency. The high accuracy driver and 5 V gate clamp enables the use of GaN MOSFETs.
Features
- Precise True Secondary Zero Current Detection with Adjustable Threshold
- Typically 20 ns Turn off Delay from Current Sense Input to Driver
- Zero Current Detection Pin Capability up to 200 V
- Optional Ultrafast (7ns) Trigger Input
- Disable Input
- Adjustable Minimum ON Time and Minimum OFF Time
- Self Synchronization
- 8 A Sink, 4 A Source Drive capability
- Light Load Detection with Modulated Gate Drive
- 4.5 V & 9 V UVLO Options and 36 V(Max)
Typical applications
- High Power Density AC/DC Power Supplies
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | C | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | ISAT (A) | fres (MHz) | Version | SW (mm) | Ti | To | Endurance (h) | IRIPPLE (mA) | ILeak (µA) | DF (%) | Ø D (mm) | Operation Force (Value) (g) | Schematic | Packaging | IR (A) | L (mH) | 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 (mW) | Application | VDE Approval | Pins | Rows | G (mm) | Gender | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 155124BS73200 | SPEC | 6 files | WL-SMSW SMT Mono-color Side View Waterclear | 470 | Blue | 468 | 150 | 3.4 | InGaN | 120 | – | – | – | – | – | -40 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Tape and Reel | – | – | – | – | – | – | 3.2 | 1.5 | 1 | SMT | – | – | – | – | – | 95 | – | – | – | – | – | – | – | ||
 | 7448030509 | SPEC | 9 files | WE-CMBNC Common Mode Power Line Choke Nanocrystalline | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | THT | – | – | – | – | – | – | – | – | – | – | – | 5 | 9 | 32 | 300 | 2100 | Nanocrystalline | 23 | 13.5 | 26 | THT | – | – | – | – | – | – | – | 40048238 | 4 | – | 5 | – | – | ||
 | 744823422 | SPEC | 10 files | WE-CMB Common Mode Power Line Choke | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | – | – | THT | – | – | – | – | – | – | – | – | – | – | – | 4 | 2.2 | 30 | 250 | 1500 | MnZn | 23.5 | 13.8 | 25.5 | THT | – | – | – | – | – | – | – | 40042670 | 4 | – | 3 | – | – | ||
 | 820412711 | SPEC | 6 files | WE-VD Disk Varistor | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +85 °C | – | – | – | THT | – | – | – | – | – | – | – | 12.5 | – | – | – | – | – | – | – | – | – | 12.5 | 4.4 | 16 | THT | 275 | 350 | 430 | 3500 | 80 | 400 | 230 VAC | Yes | – | – | – | – | – | ||
 | 890324023023 | SPEC | 8 files | WCAP-FTX2 Film Capacitors | – | – | – | – | – | – | – | 100 nF | X2 | 300 | 0.1 | 30 GΩ | -40 °C up to +105 °C | 10 | – | – | – | – | – | – | – | – | – | – | – | – | – | Bulk | – | – | – | 275 | – | – | 13 | 7 | 13 | Boxed THT | – | – | – | – | – | – | Across the mains | – | – | – | 18 | – | – | ||
| 890324024003 | SPEC | 8 files | WCAP-FTX2 Film Capacitors | – | – | – | – | – | – | – | 330 nF | X2 | 260 | 0.1 | 30 GΩ | -40 °C up to +105 °C | 12.5 | – | – | – | – | – | – | – | – | – | – | – | – | – | Bulk | – | – | – | 275 | – | – | 15 | 8.5 | 14 | Boxed THT | – | – | – | – | – | – | Across the mains | – | – | – | 18 | – | – | ||
 | 7447055 | SPEC | – | 6 files | WE-FI Leaded Toroidal Line Choke | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 5.4 | 0.15 | 42 | – | – | – | 26 | 13 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
 | 7447231101 | SPEC | 12 files | WE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 3.1 | 3.6 | Heat Shrinking Tube | – | – | – | – | – | – | – | – | – | – | – | 2.6 | 0.1 | 90 | – | – | – | 11 | 11 | 19 | THT | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 860240473003 | SPEC | 6 files | WCAP-AT1H Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 47 µF | – | – | – | – | -40 °C up to +105 °C | 2.5 | – | – | – | – | – | – | 5000 | 160 | 11.75 | 14 | 6.3 | – | – | Ammopack | – | – | – | 25 | – | – | 11 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 860240574004 | SPEC | 6 files | WCAP-AT1H Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 47 µF | – | – | – | – | -40 °C up to +105 °C | 3.5 | – | – | – | – | – | – | 8000 | 240 | 16.45 | 12 | 8 | – | – | Ammopack | – | – | – | 35 | – | – | 11.5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 860240475007 | SPEC | 6 files | WCAP-AT1H Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 220 µF | – | – | – | – | -40 °C up to +105 °C | 5 | – | – | – | – | – | – | 10000 | 580 | 55 | 14 | 10 | – | – | Ammopack | – | – | – | 25 | – | – | 16 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 860080578019 | SPEC | 7 files | WCAP-ATLI Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 680 µF | – | – | – | – | -55 °C up to +105 °C | 5 | – | – | – | – | – | – | 5000 | 2260 | 238 | 9 | 13 | – | – | Ammopack | – | – | – | 35 | – | – | 20 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 61302021021 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Angled Dual Pin Header | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 2.54 | – | – | – | – | – | – | – | – | – | – | – | – | – | Bag | 3 | – | – | – | – | – | 25.4 | – | – | THT | – | – | – | – | – | – | – | – | 20 | Dual | – | Pin Header | Angled | |
 | 450301014042 | SPEC | – | 5 files | WS-SLTV THT Mini Slide Switch, Opposite Side Connection 10x2.5 mm | – | – | – | – | – | – | – | – | – | – | – | 10000 MΩ | – | – | – | – | – | – | – | – | – | – | – | – | – | 800 | SPDT | Bulk | 0.5 | – | – | 12 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
 | 971100365 | SPEC | – | 3 files | WA-SPAIE Plastic Spacer Stud, metric, internal/ external | – | – | – | – | – | – | – | – | – | – | – | – | -30 °C up to +110°C | – | – | – | – | 6 | M3 | M3 | – | – | – | – | – | – | – | Bag | – | – | – | – | – | Polyamide | 10 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
 | 61300211121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 2.54 | – | – | – | – | – | – | – | – | – | – | – | – | – | Bag | 3 | – | – | – | – | – | 5.08 | – | – | THT | – | – | – | – | – | – | – | – | 2 | Single | – | Pin Header | Straight | |
| 750317576 | SPEC | – | – | Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 750317636 | SPEC | – | – | PFC Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 750316907 | SPEC | – | – | Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 613016243121 | SPEC | – | 6 files | WR-PHD 2.54 mm Angled Dual Socket Header | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 2.54 | – | – | – | – | – | – | – | – | – | – | – | – | – | Tray | 3 | – | – | – | – | – | 20.82 | – | – | THT | – | – | – | – | – | – | – | – | 16 | Dual | – | Socket Header | Angled |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 155124BS73200 | SPEC | |
| 7448030509 | SPEC | |
| 744823422 | SPEC | |
| 820412711 | SPEC | |
| 890324023023 | SPEC | |
| 890324024003 | SPEC | |
| 7447055 | SPEC | – |
| 7447231101 | SPEC | |
| 860240473003 | SPEC | |
| 860240574004 | SPEC | |
| 860240475007 | SPEC | |
| 860080578019 | SPEC | |
| 61302021021 | SPEC | – |
| 450301014042 | SPEC | – |
| 971100365 | SPEC | – |
| 61300211121 | SPEC | – |
| 750317576 | SPEC | – | |
| 750317636 | SPEC | – | |
| 750316907 | SPEC | – | |
| 613016243121 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | C | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | ISAT (A) | fres (MHz) | Version | SW (mm) | Ti | To | Endurance (h) | IRIPPLE (mA) | ILeak (µA) | DF (%) | Ø D (mm) | Operation Force (Value) (g) | Schematic | Packaging | IR (A) | L (mH) | 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 (mW) | Application | VDE Approval | Pins | Rows | G (mm) | Gender | Type | Samples |
|---|