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Overview
| Topology | Buck Converter |
| Input voltage | 400 V |
| Output 1 | 12 V |
| IC revision | 0.3 |
Description
Microchip’s 750W AC-DC Reference Design demonstrates a semi-bridgeless PFC topology followed by a peak current controlled zero-voltage switching full-bridge (ZVS FB) converter with digital slope compensation to achieve very high conversion efficiencies. This power supply can be firmware updated (including the compensator algorithm) with zero down time to the system it is powering while the power supply is running. It is implemented using two dsPIC33EP “GS” digital-power DSCs that provide full digital control of the power conversion as well as all system management functions.The ZVS FB Converter is designed to stepdown an input DC voltage of 400V to an output DC voltage of 12V. A unique feature of the reference design is the implementation of peak current control, using a fully software-based slope compensation algorithm, which eliminates the use of external analog components for slope compensation. The 750W AC/DC Reference Design is royalty free when used in accordance with the licensing agreement.
Features
- High Peak Output Current: 4.0A (typical)
- Independent Enable Function for Each Driver Output
- Low Shoot-Through/Cross-Conduction Current in Output Stage
- Wide Input Supply Voltage Operating Range:
- 4.5V to 18V
- High Capacitive Load Drive Capability:
- 2200 pF in 15 ns (typical)
- 5600 pF in 26 ns (typical)
- Short Delay Times: 50 ns (typical)
- Latch-Up Protected: Will Withstand 1.5A Reverse Current
- Logic Input Will Withstand Negative Swing Up To 5V
- Space-Saving Packages:
- 8-Lead 6x5 DFN, PDIP, SOIC
Typical applications
- General application AC/DC
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | VR(V (AC)) | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Pitch(mm) | L(mm) | W(mm) | H(mm) | Packaging | Type | Gender | Blade Design | Tol. C | Size | Operating Temperature | DF(%) | Ceramic Type | Fl(mm) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-FTX2 Film Capacitors, Across the mains, 1 µF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTX2 Film Capacitors | Capacitance1 µF | Rated Voltage275 V (AC) | Safety ClassX2 | Rate of Voltage Rise170 V/µs | Dissipation Factor0.1 % | Insulation Resistance10 GΩ | Pitch22.5 mm | Length26 mm | Width11 mm | Height20 mm | PackagingBulk | – | – | – | Capacitance±10% | SizePitch 22.5 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | ||||
| WCAP-CSGP MLCCs 16 V(DC), –, 100 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 16 V(DC) | Capacitance100 nF | Rated Voltage16 V (AC) | – | – | – | Insulation Resistance5 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | – | – | – | Capacitance±10% | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor3.5 % | Ceramic TypeX7R Class II | Pad Dimension0.4 mm | |||||
| WCAP-CSGP MLCCs 16 V(DC), –, 1 µF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 16 V(DC) | Capacitance1 µF | Rated Voltage16 V (AC) | – | – | – | Insulation Resistance0.1 GΩ | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Packaging7" Tape & Reel | – | – | – | Capacitance±20% | Size0603 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Ceramic TypeX5R Class II | Pad Dimension0.4 mm | |||||
 | WA-MTAB Mounting Tabs, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-MTAB Mounting Tabs | – | – | – | – | – | – | Pitch5.08 mm | – | – | – | PackagingBag | TypeVertical | GenderMale | Blade Design6.35 mm | – | – | Operating Temperature -55 °C up to +150 °C | – | – | – |