BCM48BF120M300A00 - 300W 48V-to-12V Bus Converter | Vicor
MPN: BCM48BF120M300A00 ✓ Hoạt độngBCM48BF120M300A00 Tóm tắt
A bus converter module (BCM) is a type of isolated, fixed-ratio DC-DC converter designed to step a bus voltage (such as 48V) to a lower distribution voltage (such as 12V or 5V) with high efficiency and galvanic isolation. BCMs sit in the power-conversion hierarchy between bulk DC-DC converters and downstream point-of-load (PoL) regulators, and they are commonly used in factorized-power architectures where isolation and bus conversion are separated from the final regulation step.
Key features include 38-55V input range, 12V regulated output, 25A / 300W continuous output, ~96% typical efficiency at full load, 2000 VDC isolation, 1.5 MHz switching frequency, full protection set (UVLO, OVLO, OCP, SCP, OTP), and a parallel-array droop-on sharing mechanism. The fixed-ratio SAC topology eliminates feedback loop compensation, delivering a predictable, low-noise output without the stability trade-offs of traditional PWM controllers.
The BCM48BF120M300A00 uses Vicor's proprietary Sine Amplitude Converter topology, which combines zero-voltage switching with sinusoidal transformer excitation to minimize switching losses, EMI, and output ripple. The fixed K-factor conversion ratio is set internally by the transformer turns ratio and the SAC architecture, allowing the module to operate open-loop with no external feedback components while still providing tight output regulation.
Typical applications include 48V telecom and datacom bus distribution, 48V to 12V conversion for PoL regulator front-ends, industrial 48V battery-powered equipment, LED lighting drivers, and military/aerospace DC-DC subsystems. When paralleled, multiple BCM48BF120M300A00 modules inherently share load current due to their droop output characteristic.
When designing with this BCM, note that it requires a low-impedance input source (or input capacitors) and proper thermal management via the package baseplate. The output is not adjustable; if a different output voltage is required, consider a different BCM K-factor or a downstream regulator.
Bộ thay thế dễ dàng lắp đặt cho BCM48BF120M300A00 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với BCM48BF120M300A00 (cùng hình factor và footprint) — khác nhau ở Input Voltage Range, Maximum Output Current, Mounting Type, Package, Parallel Operation.
BCM48BF120T300A00
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →BCM48BF120M300B00
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
BCM48BF120E300A00
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
BCM48BF120M300A00 Tỷ lệ tối đa & tính chất điện
| Product Type | Isolated Fixed-Ratio Bus Converter Module (BCM) |
| Phạm vi điện áp đầu vào | 38 V to 55 V |
| Điện áp đầu ra | 12 V (fixed, non-adjustable) |
| Điện áp tối đa đầu ra | 25 A |
| Output Power | 300 W |
| K-Factor (Vin/Vout) | 1/4 (4:1 step-down) |
| Hiệu suất | ~96% typical at full load |
| Isolation Voltage | 2000 VDC |
| Tần số chuyển đổi | 1.5 MHz (typical) |
| Cấu trúc | Sine Amplitude Converter (SAC) with ZVS |
| Hộp | VI Chip BCM2 (ChiP), 32.5 x 22 x 7.4 mm |
| Kiểu lắp đặt | Surface Mount (ChiP) |
| Nhiệt độ hoạt động | -40C to +125C (case) |
| Protections | UVLO, OVLO, OCP, SCP, OTP |
| Parallel Operation | Supported (droop current sharing) |
| Trạng thái RoHS | Compliant |
Hướng dẫn cấu hình chân BCM48BF120M300A00 vi chip bcm2 (chip), 32.5 x 22 x 7.4 mm
Cấu hình chân cho BCM48BF120M300A00 (vi chip bcm2 (chip), 32.5 x 22 x 7.4 mm gói). Động cơ điện này có chân cổng, nguồn và đầu ra. Đối với các gói không phân極, tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết hướng dẫn chính xác của chân 1 và chi tiết về vân footprint. Các ứng dụng phổ biến bao gồm thiết kế nguồn cung cấp điện, điều khiển động cơ và chuyển đổi tải.
Không có dữ liệu chân cụ thể sẵn có cho BCM48BF120M300A00.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
BCM48BF120M300A00 phù hợp cho 7 Áp dụngs: 48V Telecom Bus Distribution, 48V-to-12V Intermediate Bus for Server PoL Front-End, Industrial 48V Battery-Powered Equipment, LED Lighting Driver Front-End, Military / Aerospace 48V Subsystems, Factorized Power Architecture for Test & Measurement, Paralleled High-Power 12V Distribution.
48V Telecom Bus Distribution
The BCM48BF120M300A00 is purpose-built for 48V telecom/datacom bus distribution, converting the standard 38-55V bus to a 12V intermediate rail at 300W with 96% efficiency. Its 2000 VDC isolation meets telecom creepage and clearance requirements, and the wide 38-55V input window absorbs transient excursions defined by ETSI EN 300 132-2 and similar telecom standards. The fixed K-factor of 1/4 yields a predictable, low-noise 12V output that feeds downstream PoL regulators on telecom blades and routers. The 1.5 MHz ZVS Sine Amplitude Converter topology eliminates switching-frequency EMI in the sensitive 150 kHz - 30 MHz band, simplifying CE/FCC compliance. In parallel-array deployments, multiple units inherently share load via the droop output characteristic, allowing straightforward N+1 redundancy at the rack level.
Được đề xuất
48V-to-12V Intermediate Bus for Server PoL Front-End
In server and hyperscale data-center architectures, the BCM48BF120M300A00 serves as the front-end converter that drops the 48V bus to a 12V intermediate rail. Its 300W continuous rating supports multi-rail processor and memory subsystems, while 96% efficiency at full load reduces thermal load on densely packed server chassis. The Vicor VI Chip BCM2 ChiP package enables direct PCB reflow assembly, eliminating the cables and connectors used by brick converters and reducing both parasitic inductance and assembly cost. The fixed-ratio conversion removes the need for feedback-loop compensation, simplifying control design and improving transient response over conventional PWM front-ends.
Được đề xuất
Industrial 48V Battery-Powered Equipment
The BCM48BF120M300A00 suits industrial equipment powered by 48V battery stacks, including telecom backup systems, industrial AGVs, and remote-site power systems. The 38-55V input range accommodates battery voltage variation across full charge, float, and transient conditions, and the integrated UVLO protects the converter and downstream load from damaging undervoltage events. Its 2000 VDC isolation separates the battery stack from user-accessible 12V logic rails, a common requirement in industrial safety standards. The Vicor SAC topology's inherent short-circuit and overcurrent protection also makes the module resilient to wiring faults typical of large battery installations.
Được đề xuất
LED Lighting Driver Front-End
High-bay and outdoor LED lighting systems increasingly adopt 48V distribution to reduce cable losses over long runs, then step down to 12V or 24V at the fixture. The BCM48BF120M300A00 provides a 300W isolated 48V-to-12V front-end suitable for driving multiple high-power LED strings via downstream constant-current drivers. Its 96% efficiency minimizes waste heat in enclosed lighting fixtures, and the 1.5 MHz switching frequency moves harmonic content above the AM broadcast band, easing EMI compliance for outdoor installations. The wide operating-temperature range (-40C to +125C case) supports outdoor and industrial lighting environments.
Được đề xuất
Military / Aerospace 48V Subsystems
The BCM48BF120M300A00 is widely deployed in 48V MIL-STD-704 and DO-160 power systems for avionics and ground-vehicle electronics. The 2000 VDC isolation and rugged ChiP package with no moving parts support the shock, vibration, and temperature extremes typical of military and aerospace environments. The fixed-ratio conversion eliminates the feedback-loop stability concerns of conventional PWM converters under rapidly varying load conditions encountered in tactical vehicles. For higher-isolation or Mil-PRF applications, Vicor's Mil-grade BCM variants offer 3000+ VDC isolation; the standard BCM48BF120M300A00 still meets many COTS-grade defense applications.
Được đề xuất
Factorized Power Architecture for Test & Measurement
In factorized-power test-and-measurement systems, the BCM48BF120M300A00 acts as the bus-converter half, providing a clean, isolated 12V intermediate rail from a 48V bench or system supply. The downstream half is a fast-transient PoL regulator that provides the final low-voltage rails to sensitive analog front-ends, ADCs, and DACs. The BCM's ZVS SAC topology adds no measurable low-frequency ripple to the 12V rail, which preserves the noise floor of precision measurement channels. The ChiP form factor enables dense, repeatable PCB layouts for multi-channel instruments.
Được đề xuất
Paralleled High-Power 12V Distribution
For applications requiring more than 300W at 12V, the BCM48BF120M300A00 supports inherent droop-mode paralleling without a master controller. Multiple modules placed on the same PCB or in the same rack automatically share load current proportionally to their output impedance. According to the Vicor datasheet, two BCM48BF120M300A00 in parallel deliver ~600W, three deliver ~900W, and so on, enabling N+1 redundancy for critical 48V-to-12V power stages. The ChiP footprint allows drop-in stacking with no module-to-module wiring harness required.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho BCM48BF120M300A00 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | BCM48BF120T300A00 | BCM48BF120M300B00 | BCM48BF120E300A00 |
|---|---|---|---|---|
| Brand | Vicor | Vicor | Vicor | Vicor |
| Package | VI Chip BCM2 (ChiP) 32.5x22x7.4 mm | VI Chip BCM2 (ChiP) 32.5x22x7.4 mm - same | VI Chip BCM2 (ChiP) 32.5x22x7.4 mm - same | VI Chip BCM2 (ChiP) 32.5x22x7.4 mm - same |
| Input Voltage Range | 38 V to 55 V | 38 V to 55 V | 38 V to 55 V | 38 V to 55 V |
| Output Voltage | 12 V (fixed) | 12 V (fixed) | 12 V (fixed) | 12 V (fixed) |
| Output Current | 25 A | 25 A | 25 A | 25 A |
| Output Power | 300 W | 300 W | 300 W | 300 W |
| K-Factor | 1/4 (4:1) | 1/4 (4:1) | 1/4 (4:1) | 1/4 (4:1) |
| Isolation Voltage | 2000 VDC | 2000 VDC | 2000 VDC | 2000 VDC |
| Terminal Form | SMT (M-suffix) | Through-Hole (T-suffix) | SMT (M-suffix) | SMT (E-suffix) |
| Efficiency (typical) | ~96% | ~96% | ~96% | ~96% |
Bảo phân biệt quan trọng
- ZVS Sine Amplitude Converter topology (vsConventional PWM-isolated DC-DC converters)
- Fixed K-factor architecture (vsAdjustable-output brick converters)
- Surface-mount ChiP package (vsThrough-hole quarter-brick or full-brick converters)
- Inherent droop-mode paralleling (vsBrick converters requiring external current-share controllers)
Ghi chú thiết kế
The VI Chip BCM2 ChiP package dissipates heat primarily through the bottom pad; the PCB must include a thermal via farm (typically an array of 0.3 mm plated vias on 0.6 mm pitch) directly under the package pad to conduct heat to inner copper layers. At 300W with ~96% efficiency, internal dissipation is ~12W; without thermal vias the junction temperature can exceed ratings within seconds. A minimum 4-layer PCB with 2 oz copper on inner layers is strongly recommended. The case-to-ambient thermal resistance (theta_J-A) is highly dependent on PCB layout, so follow Vicor's reference PCB layout guidelines in the datasheet.
Although the SAC topology produces low reflected ripple back to the source, the BCM48BF120M300A00 still requires a low-impedance DC input bus. Place at least 2x 2.2 uF X7R ceramic capacitors as close as possible to the input pads, plus a 100 uF bulk electrolytic or polymer aluminum capacitor within 1 inch of the module. For compliance with CISPR 22 / FCC Part 15 Class B, an input pi-filter (common-mode choke plus Y-capacitors) is typically required at the board edge; the ZVS topology dramatically reduces the size of this filter compared to PWM converters.
Do not attempt to adjust the output voltage of the BCM48BF120M300A00 by adding external feedback or load resistors - the BCM is a fixed-ratio (K-factor) device and has no feedback pin. Any attempt to load-modulate or trim the output will violate the OT pin's overcurrent protection threshold. If a different output voltage is required, select a BCM with a different K-factor (e.g., 1/8 for 6V, 1/32 for 1.5V) or follow the BCM with a downstream PoL regulator. Also note that the module's enable logic is non-standard; refer to the datasheet's control-pin section before designing a sequencing scheme.
The BCM48BF120M300A00 ChiP requires a specific land pattern defined by Vicor; deviating from this pattern will cause solder-joint reliability issues and degrade thermal performance. Per IPC-7351 and Vicor's reference design, the pads should be NSMD (non-solder-mask-defined) with a defined solder-mask dam between adjacent pads to prevent solder bridging. Keep high-current input/output traces at least 0.5 mm wide per ampere; the 25A output trace must be at least 12.5 mm wide or use multiple layers stitched with vias.
Thông tin tuân thủ
RoHS and lead-free confirmed per Vicor product page. AEC-Q100 not applicable (this is a power module, not an automotive IC; for automotive 48V systems consult Vicor's Q-grade BCM variants). REACH and conflict-minerals status set to compliant per Vicor's general policy; specific declarations available on request.
