NBM2317S60D1580T0R - 800W Non-Isolated Bus Converter 48V-to-12V | Vicor
MPN: NBM2317S60D1580T0R ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $87.23 | $87.23 |
| 10 | $79.5 | $795.00 |
| 100 | $72.1 | $7,210.00 |
| 500 | $65.8 | $32,900.00 |
| 1,000 | $59.95 | $59,950.00 |
NBM2317S60D1580T0R Overview
A bus converter (BCM, bus converter module) is a specialized DC-DC converter that uses a fixed turn ratio (rather than closed-loop PWM duty-cycle regulation) to step a high-voltage distribution bus down to a lower intermediate voltage, then feeds downstream point-of-load regulators. In modern 48 V data center, telecom, and industrial architectures, bus converters bridge a 48 V backbone to legacy 12 V loads, replacing bulky isolated converters with smaller, faster, higher-density non-isolated stages. NBM (non-isolated bus converter) modules specifically omit galvanic isolation when the application architecture already provides it elsewhere, maximizing power density and transient response.
Key features of the NBM2317S60D1580T0R include a fixed K=1/4 conversion ratio (48 V nominal to 12 V nominal), 800 W continuous power capability, peak efficiency of 97.9%, and a low-noise switching topology that delivers fast transient response. The bidirectional capability allows current to flow in either direction between the high-side and low-side buses, supporting battery charging, energy storage, and dynamic load-sharing applications where power must move seamlessly between rails.
The device uses Vicor's proprietary Sine Amplitude Converter (SAC) topology operating as a resonant zero-current-switching (ZCS) or zero-voltage-switching (ZVS) architecture, dramatically cutting switching losses and EMI relative to hard-switched PWM converters. The SM-ChiP (Surface Mount ChiP) package integrates magnetics, controls, and power semiconductors into a single low-profile surface-mount module, achieving power density exceeding 1000 W/in³ while maintaining junction temperatures well within industrial limits.
Typical applications include 48 V-to-12 V intermediate bus conversion in servers and hyperscale data centers, AI accelerator and GPU power distribution, telecom equipment using -48 V battery plants, robotics and industrial 24/48 V bus systems, and bidirectional energy storage battery interfaces.
When designing with the NBM2317S60D1580T0R, account for the fixed-ratio behavior: output voltage is determined entirely by input voltage, so downstream regulation must be handled by a downstream converter (such as a Vicor PRM or a point-of-load regulator). Provide adequate thermal management on the PCB to leverage the SM-ChiP package's top-side and bottom-side cooling paths.
This page synthesizes real distributor pricing, verified drop-in alternatives within the Vicor NBM family, and practical design considerations not found in the manufacturer datasheet alone.
Drop-in alternatives for NBM2317S60D1580T0R — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with NBM2317S60D1580T0R (same form factor and footprint) — differing in Package, Topology, High-Side Input Voltage Range, Low-Side Output Voltage Range, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
NBM2317S60E1560T0R
✅ Drop-In✓ In Stock
$60.4 / Unit
View Datasheet →NBM2317S60D1580T0C
✅ Drop-In📋 Reference alternative (not in catalog)
NBM3623S60D1580T0R
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
NBM2317S60D1580T0R Maximum Ratings & Electrical Characteristics
| Topology | Non-Isolated Bus Converter (NBM) |
| Switching Topology | Sine Amplitude Converter (SAC) resonant |
| High-Side Input Voltage Range | 40 V to 60 V |
| High-Side Nominal Voltage | 48 V |
| Low-Side Output Voltage Range | 10 V to 15 V (ratiometric) |
| Low-Side Nominal Voltage | 13.5 V (at 54 V input) |
| Conversion Ratio (K-factor) | 1/4 (fixed) |
| Continuous Output Power | 800 W |
| Peak Output Power | 1080 W |
| Continuous Output Current | 80 A |
| Peak Efficiency | 97.9% |
| Bidirectional Operation | Yes |
| Package | SM-ChiP (Surface Mount ChiP), through-hole-compatible |
| Isolation | Non-isolated |
| Operating Temperature | -40C to +125C |
| Mounting Type | Surface Mount / Through-Hole ChiP |
NBM2317S60D1580T0R sm-chip (surface mount chip), through-hole-compatible Pin Configuration Guide
Pin configuration for NBM2317S60D1580T0R (sm-chip (surface mount chip), through-hole-compatible package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for NBM2317S60D1580T0R.
Refer to the datasheet for full pin configuration.
Typical Applications
NBM2317S60D1580T0R is suitable for 6 applications: 48V-to-12V Intermediate Bus Conversion in Servers, AI Accelerator and GPU Power Distribution, Telecom -48V Battery Plant Bridging, Industrial 24V/48V Bus Systems, Bidirectional Battery Energy Storage Interface, Robotics and Autonomous Vehicle Power Distribution.
48V-to-12V Intermediate Bus Conversion in Servers
The NBM2317S60D1580T0R's 1/4 fixed ratio, 97.9% peak efficiency, and 800 W continuous rating make it an ideal intermediate bus converter for hyperscale servers. Placed directly after a 48 V front-end supply, it produces a 12 V intermediate rail that downstream VRMs step down to processor core voltages (0.6-1.8 V). Its non-isolated topology removes the bulky transformer of an isolated converter, freeing 30-50% board area while improving transient response for AI accelerator load steps.
Recommended
AI Accelerator and GPU Power Distribution
Modern AI accelerators (GPUs, TPUs, custom ASICs) draw 700-1000 W each from sub-1 V rails, requiring high-current, low-voltage point-of-load conversion. The NBM2317S60D1580T0R bridges 48 V to 12 V directly above the GPU voltage regulator modules, eliminating the 12 V busbars and reducing I²R losses by a factor of 16. At 800 W and 97.9% efficiency, only 16 W is dissipated, enabling dense accelerator boards with air or cold-plate cooling.
Recommended
Telecom -48V Battery Plant Bridging
Telecom equipment traditionally uses -48 V battery plants for reliability. The NBM2317S60D1580T0R accepts the 40-60 V input envelope (positive-grounded 48 V) and produces a 12 V bus for downstream PoL regulators feeding DSP, FPGA, and network processor cores. Bidirectional capability allows the same NBM to support battery charging mode when grid power returns, simplifying the power chain. Its SAC topology delivers low EMI, easing compliance with telecom EMC standards.
Recommended
Industrial 24V/48V Bus Systems
Industrial automation systems increasingly adopt 24 V and 48 V distribution to reduce wiring losses for motors, sensors, and controllers. The NBM2317S60D1580T0R steps 48 V down to 12 V for legacy 12 V actuators, HMI panels, and PLC I/O modules. Its -40C to +125C operating range covers factory floor and outdoor cabinet environments. The bidirectional property enables regenerative braking energy recovery in motion-control applications.
Recommended
Bidirectional Battery Energy Storage Interface
Battery energy storage systems require bidirectional DC-DC stages to charge batteries from a DC bus and discharge them back to the bus when needed. The NBM2317S60D1580T0R's bidirectional capability, 97.9% peak efficiency, and fixed 1/4 ratio make it ideal for stacking 12-15 V battery modules onto a 48 V DC bus. Two NBM2317 modules in parallel can deliver 1600 W with proper current sharing, supporting residential and small-commercial storage systems.
Recommended
Robotics and Autonomous Vehicle Power Distribution
Mobile robots and autonomous vehicles use high-voltage battery packs (typically 48 V) to drive motors, while logic and sensor subsystems need 12 V and lower rails. The NBM2317S60D1580T0R bridges 48 V to 12 V with 800 W capability, sufficient for sensor arrays, compute platforms, and auxiliary actuators. Its SM-ChiP package withstands automotive vibration profiles, and bidirectional operation supports regenerative braking energy recovery from motor drives.
Recommended
Recommended Products Summary
Engineering reference data for NBM2317S60D1580T0R — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NBM2317S60E1560T0R | NBM2317S60D1580T0C | NBM3623S60D1580T0R |
|---|---|---|---|---|
| Package | Vicor SM-ChiP (2317) | Vicor SM-ChiP (2317) - same | Vicor SM-ChiP (2317) - same | Vicor SM-ChiP (3623) - different/larger |
| Brand | Vicor | Vicor | Vicor | Vicor |
| Input Voltage Range | 40 V to 60 V | 40 V to 60 V | 40 V to 60 V | 40 V to 60 V |
| Output Voltage Range | 10 V to 15 V | 13.5 V to 15.6 V | 10 V to 15 V | 10 V to 15 V |
| Continuous Output Power | 800 W | 800 W | 800 W | 1500 W (larger package) |
| Peak Efficiency | 97.9% | 97.9% | 97.9% | 98.0% |
| Bidirectional | Yes | Yes | Yes | Yes |
| Conversion Ratio | 1/4 (fixed) | 1/4 (fixed) | 1/4 (fixed) | 1/4 (fixed) |
| Isolation | Non-isolated | Non-isolated | Non-isolated | Non-isolated |
Key Differentiators
- 97.9% peak efficiency in non-isolated 48V-to-12V conversion (vs Traditional isolated half-bridge 48V-to-12V modules)
- Bidirectional operation without additional components (vs Unidirectional 48V-to-12V bus converters)
- SM-ChiP package power density exceeding 1000 W/in³ (vs Larger Vicor BCM full-chip modules (e.g., BCM6123))
Design Notes
At 800 W continuous load and 97.9% peak efficiency, the NBM2317S60D1580T0R dissipates approximately 17 W internally. The SM-ChiP package provides both top-side and bottom-side thermal paths; designers should maximize copper area on both PCB sides and consider a thermal interface material (TIM) plus heatsink for sustained full-load operation in enclosed chassis. Estimated: based on 800 W × (1/0.979 - 1) = 17.2 W loss.
The SM-ChiP package uses large surface-mount power and signal pads. Per the Vicor datasheet, follow Vicor's recommended land pattern exactly, use 4-6 oz copper on inner and outer layers for current handling, and place input/output bulk capacitors within 5 mm of the module. A 4-layer PCB with a continuous ground plane directly beneath the module is strongly recommended for thermal spreading and EMI control.
Because the NBM2317S60D1580T0R is non-isolated, the high-side and low-side grounds are common. Do not route low-voltage signal returns through the high-side power ground plane - use a star-ground or split-plane technique at the input source. Keep the SAC switching node traces short and avoid crossing the TM (temperature monitor) and PC (parallel control) signal traces with power traces to prevent noise coupling on the analog monitor signals.
Do not assume the NBM2317S60D1580T0R regulates output voltage. Output is strictly ratiometric to input - a 40 V input gives 10 V output, a 60 V input gives 15 V output. For tightly regulated downstream loads (e.g., 1.0 V GPU core), a downstream Vicor PRM or buck PoL must absorb the variation. Also note: never apply input voltage without the proper enable sequencing per the datasheet - hot-plug events can cause inrush currents that exceed the module's ratings.
Compliance Information
Vicor NBM modules are RoHS and REACH compliant per the manufacturer product page. AEC-Q100 qualification is not applicable for this part number - contact Vicor for automotive-grade NBM variants if needed.
