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Onsemi NCP4305 | Demoboard ONSEC-17-038
Secondary Side Synchronous Rectification Driver for High Efficiency SMPS Topologies
Overview
| Topology | Buck Converter |
| IC revision | 1.0 |
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 operationof 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 FETs.
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) | λPeak B typ. (nm) | λPeak G typ. (nm) | λPeak R typ. (nm) | λDom B typ. (nm) | λDom G typ. (nm) | λDom R typ. (nm) | IV typ. (mcd) | IV B typ. (mcd) | IV G typ. (mcd) | IV R typ. (mcd) | VF typ. (V) | VF B typ. (V) | VF G typ. (V) | VF R typ. (V) | Chip Technology | 2θ50% typ. (°) | Application | C | VR (V (AC)) | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | L (mm) | W (mm) | L (µH) | ISAT (A) | RDC max. (mΩ) | fres (MHz) | Version | Interface Type | PCB Thickness (mm) | Mount | IR (A) | Working Voltage (V (DC)) | Endurance (h) | IRIPPLE (mA) | ILeak (µA) | DF (%) | Ø D (mm) | Pins | Rows | H (mm) | G (mm) | Gender | Type | IR (A) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 150060BS75000 | SPEC | 25 files RAY files
| WL-SMCW SMT Mono-color Chip LED Waterclear | 470 | Blue | 465 | – | – | – | – | – | – | 145 | – | – | – | 3.2 | – | – | – | InGaN | 140 | – | – | – | – | – | – | – | -40 °C up to +85 °C | – | 1.6 | 0.8 | – | – | – | – | – | – | – | SMT | – | – | – | – | – | – | – | – | – | 0.7 | – | – | – | – | Tape and Reel | ||
 | 890324023023 | SPEC | 8 files | WCAP-FTX2 Film Capacitors | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Across the mains | 100 nF | 275 | X2 | 300 | 0.1 | 30 GΩ | -40 °C up to +105 °C | 10 | 13 | 7 | – | – | – | – | – | – | – | Boxed THT | – | – | – | – | – | – | – | – | – | 13 | 18 | – | – | – | Bulk | ||
| 890324024003 | SPEC | 8 files | WCAP-FTX2 Film Capacitors | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Across the mains | 330 nF | 275 | X2 | 260 | 0.1 | 30 GΩ | -40 °C up to +105 °C | 12.5 | 15 | 8.5 | – | – | – | – | – | – | – | Boxed THT | – | – | – | – | – | – | – | – | – | 14 | 18 | – | – | – | Bulk | ||
 | 7447231101 | SPEC | 12 files | WE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 11 | 11 | 100 | 3.1 | 90 | 3.6 | Heat Shrinking Tube | – | – | THT | – | – | – | – | – | – | – | – | – | 19 | – | – | – | 2.6 | – | ||
 | 150141M173100 | SPEC | – | 25 files RAY files
| WL-SFTW SMT Full-color TOP LED Waterclear | – | Red & Green & Blue | – | 465 | 515 | 635 | 470 | 520 | 625 | – | 230 | 950 | 270 | – | 3.2 | 3.2 | 2 | AlInGaP + InGaN | 120 | – | – | – | – | – | – | – | – | – | 3.5 | 2.8 | – | – | – | – | – | – | – | SMT | – | – | – | – | – | – | – | – | – | 1.9 | – | – | – | – | Tape and Reel | |
 | 860240473003 | SPEC | 6 files | WCAP-AT1H Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 47 µF | 25 | – | – | – | – | -40 °C up to +105 °C | 2.5 | 11 | – | – | – | – | – | – | – | – | – | – | – | 5000 | 160 | 11.75 | 14 | 6.3 | – | – | – | – | – | – | – | Ammopack | ||
| 860240574004 | SPEC | 6 files | WCAP-AT1H Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 47 µF | 35 | – | – | – | – | -40 °C up to +105 °C | 3.5 | 11.5 | – | – | – | – | – | – | – | – | – | – | – | 8000 | 240 | 16.45 | 12 | 8 | – | – | – | – | – | – | – | Ammopack | ||
| 860240475007 | SPEC | 6 files | WCAP-AT1H Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 220 µF | 25 | – | – | – | – | -40 °C up to +105 °C | 5 | 16 | – | – | – | – | – | – | – | – | – | – | – | 10000 | 580 | 55 | 14 | 10 | – | – | – | – | – | – | – | Ammopack | ||
 | 860080578019 | SPEC | 7 files | WCAP-ATLI Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 680 µF | 35 | – | – | – | – | -55 °C up to +105 °C | 5 | 20 | – | – | – | – | – | – | – | – | – | – | – | 5000 | 2260 | 238 | 9 | 13 | – | – | – | – | – | – | – | Ammopack | ||
 | 632121300001 | SPEC | – | 6 files | WR-COM USB 3.1 Type A Receptacle Horizontal THT Power Delivery | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | USB 3.1 | – | – | – | – | – | 100 MΩ | -20 °C up to +85 °C | – | – | – | – | – | – | – | – | Type A | – | THR | 5 | 20 | – | – | – | – | – | 9 | – | – | – | Receptacle | Horizontal | 5 | Tray | |
 | 632723300011 | SPEC | – | 6 files | WR-COM USB 3.1 Type C Receptacle Horizontal THR / SMT | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | USB 3.1 | – | – | – | – | – | 1000 MΩ | – | – | – | – | – | – | – | – | – | Type C | 1.6 | THR | – | 20 | – | – | – | – | – | 24 | – | – | 1.9 | Receptacle | Horizontal | 5 | Tape and Reel | |
 | 61300211121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 2.54 | 5.08 | – | – | – | – | – | – | – | – | THT | – | 250 | – | – | – | – | – | 2 | Single | – | – | Pin Header | Straight | 3 | Bag | |
| 61300311121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 2.54 | 7.62 | – | – | – | – | – | – | – | – | THT | – | 250 | – | – | – | – | – | 3 | Single | – | – | Pin Header | Straight | 3 | Bag | |
| 61300411121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 2.54 | 10.16 | – | – | – | – | – | – | – | – | THT | – | 250 | – | – | – | – | – | 4 | Single | – | – | Pin Header | Straight | 3 | Bag | |
| 750317576 | SPEC | – | – | Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | λPeak B typ. (nm) | λPeak G typ. (nm) | λPeak R typ. (nm) | λDom B typ. (nm) | λDom G typ. (nm) | λDom R typ. (nm) | IV typ. (mcd) | IV B typ. (mcd) | IV G typ. (mcd) | IV R typ. (mcd) | VF typ. (V) | VF B typ. (V) | VF G typ. (V) | VF R typ. (V) | Chip Technology | 2θ50% typ. (°) | Application | C | VR (V (AC)) | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | L (mm) | W (mm) | L (µH) | ISAT (A) | RDC max. (mΩ) | fres (MHz) | Version | Interface Type | PCB Thickness (mm) | Mount | IR (A) | Working Voltage (V (DC)) | Endurance (h) | IRIPPLE (mA) | ILeak (µA) | DF (%) | Ø D (mm) | Pins | Rows | H (mm) | G (mm) | Gender | Type | IR (A) | Packaging | Samples |
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