FAN9673Q - 3-Channel Interleaved CCM PFC Controller | onsemi
Référence : FAN9673Q ✓ Actif| Qté | Prix unitaire | Total |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1 000 | $0 | $0,00 |
FAN9673Q Présentation
A power-factor-correction controller is a power-management semiconductor that shapes the input current drawn from an AC supply so that the load appears closer to a resistive load. A PFC stage is commonly placed between the AC input and a downstream DC converter, reducing input-current harmonics while raising the intermediate DC bus. The FAN9673 belongs to the PFC controller, AC-DC power conversion, power-management IC, and semiconductor hierarchy.
The main engineering benefit of this device is its three-channel interleaved architecture. Interleaving distributes inductor and switch duties among three boost phases, reducing ripple and helping distribute magnetic and thermal loading. The manufacturer describes the controller as intended for PFC pre-regulators and states that the implementation supports compliance with the IEC 1000-3-2 specification; this is a functional design capability, not a guarantee that every finished product is compliant without system validation.
FAN9673Q uses continuous-conduction-mode control and includes the control circuitry required for average-current boost PFC. Designers select inductors, rectifiers, switching devices, capacitors, sensing networks, and gate-drive components around the controller. The switching-frequency options and 32-LQFP package make it relevant to high-power AC-DC front ends, but the complete operating limits, pin names, compensation details, and protection thresholds must be taken from the FAN9673 manufacturer datasheet.
Typical applications include server and telecom power supplies, industrial power systems, large offline converters, and PFC pre-regulators feeding downstream isolated or non-isolated DC-DC stages. Three-phase interleaving is especially useful where low input ripple, reduced magnetic stress, or improved thermal distribution is important. The controller itself does not provide the boost power stage; external MOSFETs, rectifiers, inductors, and sensing components are required.
For PCB design, preserve the high-current power-loop geometry associated with each boost phase, use short gate-drive paths, and place current-sense and control components away from switching nodes. Validate inductor saturation, rectifier reverse recovery, current-loop compensation, startup behavior, and thermal performance across line frequency, load, and temperature. Use the manufacturer datasheet for exact pinout, electrical limits, timing, compensation, and application guidance.
This page consolidates the verified manufacturer description, package and frequency data, sourcing context, application guidance, and practical design considerations into an engineering reference for engineers evaluating the FAN9673Q.
Alternatives de remplacement direct pour FAN9673Q — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesFAN9673Q Valeurs maximales et caractéristiques électriques
| Controller Type | Three-channel interleaved CCM PFC controller |
| Power Conversion Topology | Boost-type power-factor correction pre-regulator |
| Operating Mode | Continuous Conduction Mode (CCM) |
| Switching Frequency Range 1 | 18 kHz to 40 kHz |
| Switching Frequency Range 2 | 55 kHz to 75 kHz |
| Channel Count | 3 channels |
| Input Current Control Method | Leading-edge and average-current boost PFC techniques |
| Boîtier | 32-LQFP, 7 x 7 mm |
| Manufacturer | onsemi |
| Compliance Target | IEC 1000-3-2 specification support |
| Datasheet Description | Power Factor Correction (PFC) controller IC |
| Switching Stage | External boost power stage |
| Type de montage | Surface-mount LQFP |
| Power Management Domain | AC-DC power conversion |
| Controller Class | PFC controller |
| Input-Line Use | AC input PFC pre-regulator |
Guide de configuration des broches du FAN9673Q 32-lqfp, 7 x 7 mm
Configuration des broches du FAN9673Q (boîtier 32-lqfp, 7 x 7 mm). Ce composant de puissance comporte des bornes de grille, de drain et de source. Pour les boîtiers non polarisés, consultez la fiche technique du fabricant pour l'orientation exacte de la broche 1 et les détails de l'empreinte. Les applications courantes incluent la conception d'alimentations, la commande de moteurs et la commutation de charges.
Aucune donnée de brochage détaillée disponible pour FAN9673Q.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
FAN9673Q convient pour 6 applications: Server AC-DC Front End, Telecom Power Supply Pre-Regulator, Industrial Power Conversion, Large Offline AC-DC Converter, PFC Pre-Regulator for Downstream DC-DC, Power-Supply Test and Qualification Platform.
Server AC-DC Front End
FAN9673Q is suitable for evaluating a three-phase boost-PFC stage in server or high-power computing power supplies. Its interleaved CCM architecture can distribute current ripple and magnetic loading across three channels instead of concentrating them in one boost phase. The controller would be placed between the AC input and the downstream DC bus, with external MOSFETs, rectifiers, inductors, current-sense networks, and protection circuitry. The 18 kHz to 40 kHz and 55 kHz to 75 kHz frequency ranges provide defined operating choices, but final power level, input range, bus voltage, efficiency, and thermal limits must be validated from the manufacturer datasheet.
Recommandé
Telecom Power Supply Pre-Regulator
The FAN9673Q can serve as the front-end PFC controller in telecom rectifier systems where a regulated intermediate bus feeds downstream DC-DC converters. Three interleaved boost channels may help reduce input-current ripple and distribute the stress associated with rectification and magnetic components. The design still needs complete external power stages for all three phases. Engineers should verify high-voltage tolerances, current-sense limits, switching-device selection, control-loop compensation, and safety isolation before release; those detailed ratings are not fully included in the supplied verified snippets.
Recommandé
Industrial Power Conversion
For industrial AC-DC equipment, FAN9673Q can organize a three-phase PFC pre-regulator ahead of a downstream power-conversion stage. Interleaving is useful when the design objective includes lower conducted ripple, improved phase distribution, or reduced stress concentration in inductors and rectifiers. The controller does not replace the power semiconductors, magnetics, capacitors, or safety components. A production design must be checked for line transients, surge immunity, component derating, current balance among channels, thermal rise, and the applicable product compliance requirements.
Recommandé
Large Offline AC-DC Converter
FAN9673Q is applicable to larger offline converter front ends that require active input-current shaping before a main DC bus is established. Its boost-type PFC control is intended to improve the power factor of the completed supply and can support an IEC 1000-3-2-oriented design when the total system is engineered and tested appropriately. Three interleaved channels distribute switching duties, but the converter designer must select each inductor for the intended frequency range and current waveform and must validate rectifier stress, MOSFET voltage margin, EMI, and thermal performance.
Recommandé
PFC Pre-Regulator for Downstream DC-DC
The FAN9673Q can be used as the upstream power-factor-correction controller in a multi-stage AC-DC architecture, where a controlled DC bus feeds isolated, non-isolated, or regulated downstream converters. Its three-channel structure lets the designer distribute boost-phase operation while retaining a dedicated PFC function upstream. The controller’s verified frequency ranges provide design starting points, not a complete output-voltage specification. Confirm the bus level, phase-current limit, current-sense network, control-loop compensation, fault response, and safety boundaries in the official datasheet before selecting external power components.
Recommandé
Power-Supply Test and Qualification Platform
FAN9673Q is useful in a lab or qualification platform for evaluating interleaved PFC behavior, phase current balance, startup, line regulation, and conducted emissions. Because the controller requires an external boost stage, the test platform should provide programmable AC input, isolated probing, controllable loading, and instrumentation for each inductor current. Engineers can use the two verified switching-frequency ranges to define test cases, but should obtain the exact frequency-selection mechanism and timing specifications from the manufacturer datasheet. Qualification should cover worst-case line, load, temperature, startup, and fault conditions.
Recommandé
Données de référence d'ingénierie pour FAN9673Q — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Controller Type | Three-channel interleaved CCM PFC controller |
| Power Conversion Topology | Boost-type PFC pre-regulator |
| Operating Mode | Continuous Conduction Mode (CCM) |
| Switching Frequency Range | 18 kHz to 40 kHz; 55 kHz to 75 kHz |
| Channel Count | 3 channels |
| Package | 32-LQFP, 7 x 7 mm |
| Brand | onsemi |
| Current-Control Method | Leading-edge and average-current boost PFC techniques |
| Compliance Capability | Supports designs intended to comply with IEC 1000-3-2 |
Principaux différenciateurs
- Three-channel interleaved PFC architecture (vs Generic single-channel PFC controller)
- CCM boost PFC positioning (vs Discrete-mode or non-interleaved controller)
- Defined dual frequency ranges (vs Unspecified-frequency controller alternatives)
Notes de conception
Place the controller, gate-driver interface, current-sense network, and compensation components on the quiet side of the power board. Keep each boost-phase current loop compact and connect the switching device, inductor, and high-frequency capacitor in the smallest practical loop. Route boost-switch and rectifier nodes away from the FAN9673Q control pins to reduce common-mode coupling and measurement errors.
Use the two verified controller frequency ranges, 18 kHz to 40 kHz and 55 kHz to 75 kHz, as design starting points rather than assuming one frequency applies to every operating condition. Select inductors, MOSFETs, rectifiers, and capacitors based on the actual phase current, switching transitions, duty cycle, bus voltage, and ripple target. Confirm the final selection against the official datasheet and application circuit.
Interleaving can distribute switching and magnetic stress among three phases, but it does not eliminate thermal design. Calculate worst-case conduction and switching loss in each MOSFET, rectifier, inductor, and current-sense element, then account for ambient temperature, copper area, thermal vias, and neighboring heat sources. Validate channel balance because unequal phase current can concentrate loss and reduce the benefit of interleaving.
Do not treat the PFC controller as a complete power supply or assume IEC 1000-3-2 compliance is automatic. Verify the AC input range, surge and transient response, current-sense polarity, soft-start behavior, overcurrent protection, undervoltage behavior, bus discharge, and fault recovery. Use the official FAN9673 datasheet for exact limits and compensation because those values are not present in the retrieved search snippets.
Informations de conformité
The supplied verified data states that FAN9673Q is intended for power supplies designed to comply with IEC 1000-3-2, but it does not provide a product-specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration. Compliance must be confirmed from current onsemi documentation.
