BCM48BF120T300A00 - 300W 48V-to-12V BCM Bus Converter | Vicor
Référence : BCM48BF120T300A00 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $142.5 | $142,50 |
| 10 | $132.1 | $1 321,00 |
| 100 | $121.85 | $12 185,00 |
| 500 | $112.4 | $56 200,00 |
| 1 000 | $104.25 | $104 250,00 |
BCM48BF120T300A00 Présentation
A Bus Converter Module (BCM) is a class of isolated DC-DC converters designed to provide a fixed, non-regulated intermediate bus voltage from a higher nominal DC rail, typically feeding downstream Point-of-Load (PoL) regulators. BCMs sit in the power supply hierarchy above LDOs and buck converters and below AC-DC front ends; their primary function is efficient, isolated voltage transformation with high power density and ZVS/ZCS soft switching. The fixed-ratio topology simplifies feedback loop design because the output voltage inherently tracks the input through the transformer turns ratio.
Key features of the BCM48BF120T300A00 include a wide 38-55 V input range for 48 V telecom and industrial bus compatibility, 12 V/30 A (300 W) output, fixed K=1/4 conversion ratio, 97% peak efficiency, and parallel operation capability with automatic current sharing. The co-molded VI Chip® package exposes a large thermal interface area for cold-plate or heatsink mounting, and the surface-mount land pattern enables standard SMT assembly with pick-and-place equipment.
The BCM48BF120T300A00 uses Vicor's proprietary Sine Amplitude Converter (SAC) topology with zero-current and zero-voltage soft switching, which reduces EMI, lowers switching losses, and enables the high efficiency across the input range. The fixed-ratio architecture eliminates the need for optocoupler-based feedback loops, simplifying safety certification. The 4 kV+ isolation barrier qualifies the part for ITE, industrial, and select telecom safety standards.
Typical applications include 48 V telecom point-of-load power distribution, intermediate bus conversion for distributed power architectures, industrial 48 V battery-powered equipment, high-performance computing and server auxiliary rails, and LED display driver power. The fixed-ratio output is ideal as a front-end to downstream Vicor PRM or ZVS buck regulators for PoL conversion.
When designing with this BCM, ensure the input source can deliver the full 9 A peak input current and provide adequate bulk capacitance to limit startup inrush. The VI Chip® package requires thermal interface material and either a cold plate or significant PCB copper area for sustained 300 W operation.
This page synthesizes distributor pricing, drop-in BCM alternatives, and practical design notes from the Vicor datasheet that go beyond what is found on individual distributor product listings.
Alternatives de remplacement direct pour BCM48BF120T300A00 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec BCM48BF120T300A00 (même facteur de forme et même empreinte) — différant par Input Voltage Range, Maximum Output Current, Mounting Type, Package, Parallel Operation.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
BCM48BT120T300A00
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
BCM48BF480T300A00
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
BCM48BF320T300A00
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
BCM384F120T300A00
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
B048T480T30A
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
BCM48BF120T300A00 Valeurs maximales et caractéristiques électriques
| Topologie | BCM (Bus Converter Module), fixed-ratio isolated |
| Conversion Ratio (K) | 1/4 (K=0.25) |
| Plage de tension d'entrée | 38 V to 55 V DC |
| Nominal Input Voltage | 48 V DC |
| Output Voltage (Nominal) | 12 V DC (K x VIN) |
| Continuous Output Power | 300 W |
| Courant de sortie maximal | 30 A |
| Peak Efficiency | 97% typical |
| Nombre de sorties | 1 |
| Isolation Voltage (Input to Output) | 4.0 kV DC minimum |
| Switching Topology | Sine Amplitude Converter (SAC), ZVS/ZCS soft switching |
| Boîtier | VI Chip® 60-pin Full-Chip (Full VIC) |
| Type de montage | Surface Mount (SMT compatible) |
| Parallel Operation | Yes, with automatic current sharing |
| Cooling | Cold plate or thermal interface material required for full 300 W |
| Statut RoHS | Compliant |
Guide de configuration des broches du BCM48BF120T300A00 vi chip® 60-pin full-chip (full vic)
Configuration des broches du BCM48BF120T300A00 (boîtier vi chip® 60-pin full-chip (full vic)). 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 BCM48BF120T300A00.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
BCM48BF120T300A00 convient pour 6 applications: 48 V Telecom Intermediate Bus, Industrial 48 V Battery-Powered Equipment, Server and Data-Center 48 V Distribution, LED Display Driver Power, Aerospace and Defense Auxiliary Power, High-End Audio and RF Power Conditioning.
48 V Telecom Intermediate Bus
The BCM48BF120T300A00 is purpose-built for 48 V telecom power distribution, where it converts the nominal 48 V DC bus to a 12 V intermediate rail for downstream PoL converters. Its 38-55 V input range covers the full telecom envelope (including ±10% tolerance on 54 V battery plants), and the 300 W rating serves single-board or subrack-level loads. The 97% typical efficiency eliminates forced-air cooling in many deployments, while >4.0 kV DC isolation meets IEEE 1100 telecom safety requirements. Placed directly across the battery plant bus, the part feeds downstream Vicor PRM/VTM stages for further point-of-load regulation in 5G base stations, optical line terminals, and central-office gear.
Recommandé
Industrial 48 V Battery-Powered Equipment
In industrial 48 V battery-powered systems (forklifts, AGVs, telecom-grade UPS, and solar battery banks), the BCM48BF120T300A00 serves as the primary isolation-and-down-conversion stage from the 48 V battery rail to a usable 12 V bus. The module's fixed K=1/4 ratio means the output inherently tracks the battery state-of-charge, simplifying the charge/discharge profile management. Its 300 W continuous rating covers most single-board industrial controllers, and its wide 38-55 V input range tolerates battery droop and charging transients. According to the Vicor datasheet, the hard-switched-capability of the SAC topology survives harsh EMI environments typical of motor-drive and induction-heating co-located systems.
Recommandé
Server and Data-Center 48 V Distribution
The BCM48BF120T300A00 is widely used in hyperscale data-center 48 V distribution architectures (Open Compute Project 48 V rack-level schemes), where it converts the 48 V bus directly to a 12 V intermediate bus for downstream VRM/PoL conversion. Compared to legacy 12 V rack distribution, 48 V distribution cuts copper losses by 16x, and the BCM's 97% efficiency preserves that advantage at the conversion stage. The 60-pin VI Chip® surface-mount form factor integrates into high-density server-PCB layouts, while parallel-array capability lets engineers scale from 300 W to multiple kilowatts. According to OCP and Vicor documentation, this part supports Open Rack V3 and 48 V motherboard concepts.
Recommandé
LED Display Driver Power
Large-format LED video walls and professional lighting fixtures require isolated, high-current 12 V rails to drive driver IC arrays. The BCM48BF120T300A00's 30 A continuous output is well-matched to a single driver PCB feeding hundreds of LEDs, and the >4 kV isolation protects downstream driver and control electronics from line-side transients on the 48 V bus. The 97% efficiency keeps the BOM cost lower than alternative architectures by reducing thermal-management overhead. According to the Vicor BCM datasheet, the fixed 12 V output simplifies firmware current-loop design on the LED driver side.
Recommandé
Aerospace and Defense Auxiliary Power
In aerospace and defense power architectures, the BCM48BF120T300A00 serves as a 270 V-to-28 V or 48 V-to-12 V intermediate stage in systems where MIL-STD-704F or DO-160 environmental compliance is required. The fixed-ratio topology removes optocoupler-based feedback - the most common single point of failure in isolated converters - increasing mean-time-between-failure in safety-critical applications. The VI Chip® package's hermetic-grade co-molding and broad temperature-performance lend the module to avionics-grade power distribution. According to Vicor, BCM products are used in flight-control and avionics power subsystems for fixed-wing and rotary aircraft.
Recommandé
High-End Audio and RF Power Conditioning
High-end audio amplifiers and RF power amplifiers (cell-tower PA, broadcast) need ultra-low-noise power rails to avoid hum-mixing into sensitive signal paths. The BCM48BF120T300A00's ZVS/ZCS soft-switching SAC topology inherently produces less EMI ripple than hard-switched converters, and when followed by a downstream LDO (such as a TPS7A47 series TI part) the resulting rail is cleaner than switching-only solutions. While the BCM48BF120T300A00 alone is not the lowest-noise option, its 97% efficiency paired with a final-stage LDO provides an optimal low-noise, low-thermal-budget power chain for 300 W-class amplifiers and PA modules in broadcast and cellular infrastructure.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour BCM48BF120T300A00 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | BCM48BT120T300A00 | BCM48BF480T300A00 | BCM48BF320T300A00 | BCM384F120T300A00 | B048T480T30A |
|---|---|---|---|---|---|---|
| Brand | Vicor | Vicor | Vicor | Vicor | Vicor | Vicor |
| Package | VI Chip® 60-pin Full-Chip (F) | VI Chip® 60-pin Full-Chip (T) | VI Chip® 60-pin Full-Chip (F) | VI Chip® 60-pin Full-Chip (F) | VI Chip® 60-pin Full-Chip (F) | VI Chip® 60-pin Full-Chip (T) |
| Input Voltage Range | 38-55 V | 38-55 V | 38-55 V | 38-55 V | 360-400 V | 38-55 V |
| Output Voltage (Nominal @ 48 V) | 12 V | 12 V | 3 V | 6 V | 32.5 V (at 380 V input) | 12 V |
| Conversion Ratio (K) | 1/4 (0.25) | 1/4 (0.25) | 1/16 (0.0625) | 1/8 (0.125) | 1/12 (0.0833) | 1/4 (0.25) |
| Continuous Output Power | 300 W | 300 W | 300 W | 300 W | 300 W | 300 W |
| Maximum Output Current | 30 A | 30 A | 100 A (low Vout) | 50 A (low Vout) | 9.2 A (high Vout) | 30 A |
| Peak Efficiency | 97% | 97% | 94% | 96% | 95% | 97% |
| Isolation (Input to Output) | 4.0 kV DC | 4.0 kV DC | 4.0 kV DC | 4.0 kV DC | 4.0 kV DC | 4.0 kV DC |
Principaux différenciateurs
- Highest efficiency in 48 V-to-12 V bus-converter class (vs BCM48BF480T300A00)
- Industry-standard 48 V telecom input range (vs BCM384F120T300A00)
- F-package (Full-Chip) form factor (vs BCM48BT120T300A00)
- 300 W in compact VI Chip® footprint with ZVS/ZCS (vs Discrete 48 V-to-12 V buck + isolation transformers)
Notes de conception
At 300 W continuous output, the BCM48BF120T300A00 requires either a cold plate or substantial PCB thermal-interface material to maintain acceptable junction temperature. The VI Chip® package was designed for chassis-mount cooling - surface-mount cooling-only with PCB copper is generally inadequate for sustained 300 W operation. Engineering reviewers should always pair the part with Vicor's thermal-management documentation and verify junction-to-cold-plate delta at max load. Estimated: at 300 W with 97% efficiency the dissipation is ~9 W, manageable with proper cold-plate mounting but exceeding the capability of PCB-only cooling.
The VI Chip® F-package is a surface-mount module with edge castellations that require precise land-pattern artwork matching the Vicor reference PCB layout. Keep input/output bulk capacitors as close to the VIN+/- and VOUT+/- pins as possible. The module's high di/dt current loops dictate wide copper pours or copper bus-bars for both input and output return paths. Ensure the array/parallel-sharing pins are wired correctly when paralleling; check the datasheet for proper biasing to avoid circulating currents between paralleled modules.
Do not confuse the BCM48Bx120x300A00 family members with each other - F and T differ mechanically (full-chip vs through-hole-style leadframe) and the 480/320 numbers in sibling parts denote different K ratios (1/16 and 1/8), not different output voltages. Always verify the specific part number's K ratio against your downstream converter design. Also, the fixed-ratio output is unregulated - for tighter voltage regulation you must follow the BCM with a Vicor PRM or other pre-regulator rather than driving the load directly. Per the datasheet, the soft-start pin must be controlled to limit inrush current.
Apply EMI best practices around the BCM: route the input power loops over a solid ground plane to confine the high-frequency CM currents, and place Y-capacitors at the input for common-mode noise reduction. According to Vicor's reference designs, the soft-switching SAC topology produces significantly less EMI than hard-switched converters, but the input-side AC ripple current still requires filtering for conducted-emissions compliance to EN 55022/CISPR 22. Add a CM choke and X2-rated Y-caps as shown in the reference design for FCC/CE Class A/B compliance.
Informations de conformité
RoHS and REACH compliance per Vicor product page. AEC-Q100 does not apply - this is an industrial/telecom power module, not an automotive-qualified IC. Some Vicor datasheets include UL/IEC 60950/62368-1 recognition for the VI Chip® module family for ITE safety end-product compliance.
