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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
Full digital controlStandardized form factor: 1U20 ms minimum hold-up time to compensate drop-outs during UPS step-inUnder/Over voltage lock-outAdaptive controlPeak current controlled ZVS Full Bridge Converter with unique adaptive digital slope compensation softwareDemonstration of Online Firmware updates (Live Update) on both PFC and DC-DC converter stages
Typical applications
- General application AC/DC
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | Application | C | VR (V (AC)) | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | L (mm) | W (mm) | H (mm) | Packaging | Type | Gender | Blade Design | Tol. C | Size | Operating Temperature | DF (%) | Ceramic Type | Fl (mm) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 890324026027 | SPEC | 8 files | WCAP-FTX2 Film Capacitors | Across the mains | 1 µF | 275 | X2 | 170 | 0.1 | 10 GΩ | -40 °C up to +105 °C | 22.5 | 26 | 11 | 20 | Bulk | – | – | – | ±10% | Pitch 22.5 mm | -40 °C up to +105 °C | – | – | – | ||
 | 885012206046 | SPEC | 8 files | WCAP-CSGP MLCCs 16 V(DC) | – | 100 nF | 16 | – | – | – | 5 GΩ | – | – | 1.6 | 0.8 | 0.8 | 7" Tape & Reel | – | – | – | ±10% | 0603 | -55 °C up to +125 °C | 3.5 | X7R Class II | 0.4 | ||
| 885012106017 | SPEC | 8 files | WCAP-CSGP MLCCs 16 V(DC) | – | 1 µF | 16 | – | – | – | 0.1 GΩ | – | – | 1.6 | 0.8 | 0.8 | 7" Tape & Reel | – | – | – | ±20% | 0603 | -55 °C up to +85 °C | 10 | X5R Class II | 0.4 | ||
 | 7471287 | SPEC | – | 5 files | WA-MTAB Mounting Tabs | – | – | – | – | – | – | – | – | 5.08 | – | – | – | Bag | Vertical | Male | 6.35 mm | – | – | -55 °C up to +150 °C | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 890324026027 | SPEC | |
| 885012206046 | SPEC | |
| 885012106017 | SPEC | |
| 7471287 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | Application | C | VR (V (AC)) | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | L (mm) | W (mm) | H (mm) | Packaging | Type | Gender | Blade Design | Tol. C | Size | Operating Temperature | DF (%) | Ceramic Type | Fl (mm) | Samples |
|---|