NBM2317S60E1560T0R-VICOR - 800W Non-Isolated Bus Converter | Vicor
MPN: NBM2317S60E1560T0R-VICOR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $83.16 | $83.16 |
| 10 | $76.5 | $765.00 |
| 100 | $68.2 | $6,820.00 |
| 500 | $61.4 | $30,700.00 |
| 1,000 | $55.85 | $55,850.00 |
NBM2317S60E1560T0R-VICOR Overview
A bus converter module (BCM) is a fixed-ratio, non-isolated DC-DC converter that divides an intermediate bus voltage by a fixed K-factor (turns ratio equivalent) to produce a lower, regulated-feeling output. BCMs sit between an isolated front-end converter and downstream point-of-load (PoL) regulators, providing a low-impedance intermediate voltage rail with fast transient response and high efficiency. As fixed-ratio devices, BCMs cannot regulate output voltage independently of input voltage - regulation is achieved by the upstream front-end converter and downstream PoL stages, while the BCM provides the power transformation with minimal loss.
Key features include a fixed K-factor of 1/4, a sinusoidal SAC switching waveform that minimises EMI and acoustic noise, low AC impedance beyond the bandwidth of typical PoL regulators, and up to 4.5 kW per cubic inch power density. The device supports up to 1 kW peak output for 2 ms transient events, an integrated thermal management footprint accepting either two-sided or bottom-side PCB cooling, and parallel operation capability for higher power rails. The ChiP surface-mount form factor eliminates through-hole magnetics and shrinks the converter footprint by an order of magnitude compared with discrete bus-converter designs.
The NBM2317S60E1560T0R uses a zero-voltage switching (ZVS), zero-current switching (ZCS) Sine Amplitude Converter architecture operating at a fixed fundamental frequency in the megahertz range. The fixed K-factor of 1/4 means any input from 38 V to 60 V produces an output of 9.5 V to 15 V (Vin/4); the stated nominal output is 13.5 V at the typical 54 V nominal input. The bidirectional capability allows the same module to operate as a step-down or step-up converter, supporting battery charging and energy-storage applications without a second power path.
Typical applications include 48 V telecommunications intermediate bus architectures, blade-server and high-performance compute power delivery, battery-backed 48 V infrastructure, industrial automation systems with 48 V or 54 V distribution, and high-current PoL rails where upstream isolation is handled separately. Designers commonly cascade this BCM with downstream PRM (pre-regulation) and VTM (voltage transformation) Vicor components, or with a family of point-of-load regulators from the same Vicor ecosystem.
When designing with this device, ensure that input voltage remains within the 38 V to 60 V window under all line and load transients, and that the upstream source can absorb reflected ripple current from the BCM. The ChiP solder-pad layout is not compatible with hand-soldered or socketed assemblies - it requires a reflow profile aligned with the J-STD-020 MSL rating for the part.
This page synthesises distributor pricing, drop-in same-family alternatives, and practical thermal-layout notes that are not gathered in any single manufacturer datasheet, giving engineers a faster path to a verified BOM decision.
Drop-in alternatives for NBM2317S60E1560T0R-VICOR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
NBM2317S60D1560T0R
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
NBM2317S60C1560T0R
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
NBM2317S60E1252T0R
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
NBM2317S60E1880T0R
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
NBM2317S60E1560T0R-VICOR Maximum Ratings & Electrical Characteristics
| Topology | Sine Amplitude Converter (SAC), fixed K-factor 1/4 |
| Function | Non-isolated, fixed-ratio bus converter module (BCM) |
| Peak Efficiency | 97.9 % |
| Input Voltage Range | 38 V to 60 V DC |
| Nominal Input Voltage | 54 V DC |
| Output Voltage | 13.5 V nominal (Vin x K, K = 1/4) |
| Output Voltage Range (ratiometric) | 9.5 V to 15 V |
| Maximum Continuous Output Power | 800 W |
| Peak Output Power | Up to 1 kW for 2 ms |
| Rated Output Current (step-down) | 60 A |
| Power Density | Up to 4.5 kW/in3 |
| Bidirectional Operation | Yes (step-down and step-up) |
| Cooling | Two-sided or bottom-side (PCB) cooling |
| Package / Form Factor | Vicor ChiP (Chip surface-mount power module) |
| Mounting Type | Surface Mount (reflow required) |
| RoHS Status | Compliant |
| Isolation | Non-isolated (input-to-output) |
NBM2317S60E1560T0R-VICOR vicor chip (chip surface-mount power module) Pin Configuration Guide
Pin configuration for NBM2317S60E1560T0R-VICOR (vicor chip (chip surface-mount power module) 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 NBM2317S60E1560T0R-VICOR.
Refer to the datasheet for full pin configuration.
Typical Applications
NBM2317S60E1560T0R-VICOR is suitable for 6 applications: 48 V Telecom Intermediate Bus, High-Performance Compute / Server Power, Battery-Backed 48 V Infrastructure, Industrial Automation with 48 V Distribution, RF Power Amplifier and Broadcast Supplies, Automotive 48 V Mild-Hybrid Systems.
48 V Telecom Intermediate Bus
The NBM2317S60E1560T0R fits 48 V telecom intermediate-bus designs where a fixed K-factor 1/4 step from 48 V to 12 V intermediate rail drives downstream PoL regulators. Its 800 W continuous output handles densely populated ATCA or Open Compute cards and its 97.9 percent peak efficiency (per Vicor datasheet) keeps system thermals within a 100 cubic-foot rack envelope. Placed near the backplane power entry, it produces a clean 13.5 V rail with low AC impedance that exceeds the bandwidth of typical PoL regulators, allowing bulk capacitance to be moved from the PoL input to the BCM high side to reduce PoL footprint.
Recommended
High-Performance Compute / Server Power
In HPC racks and GPU accelerator shelves the NBM2317S60E1560T0R converts a 48 V or 54 V intermediate bus to a 12 V or 13.5 V rail with 800 W continuous and 1 kW 2 ms peak capability. Its low-EMI SAC waveform reduces shielding requirements on adjacent high-speed serial links such as PCIe Gen5 and 100 GbE, while the ChiP surface-mount form factor frees the bottom of an AI GPU baseboard for signal routing. The K=1/4 fixed ratio means downstream PoL regulation is by a separate low-voltage regulator, simplifying load transient management and reducing bulk input capacitance by relocating it to the upstream side of the BCM.
Recommended
Battery-Backed 48 V Infrastructure
Bidirectional start-up and steady-state operation makes the NBM2317S60E1560T0R suitable for battery-backed 48 V infrastructure including UPS-grade power shelves and telecom central-office DC plants. The module can step-down a bus voltage to charge a Li-ion stack or step-up a battery source back onto the bus during outages, eliminating the second power path that unidirectional converters require. At 97.9 percent peak efficiency it is well matched to ride-through operation where power flows back to the bus during peaks, and the integrated thermal model supports two-sided or PCB-only cooling in confined switchgear enclosures.
Recommended
Industrial Automation with 48 V Distribution
Factory-floor robotics and industrial servo drives increasingly use 48 V distribution to reduce cable size and I^2R losses, and the NBM2317S60E1560T0R converts that 48 V to a 12 V or 13.5 V intermediate bus for motor-driver auxiliary rails. Its 800 W continuous rating covers a multi-axis robot cabinet at moderate drive load. The bidirectional rating allows kinetic energy recovery on decelerating axes by pumping power back onto the 48 V rail, and the low-noise SAC waveform prevents common-mode noise from coupling back into sensitive encoder feedback circuits adjacent to the BCM.
Recommended
RF Power Amplifier and Broadcast Supplies
The NBM2317S60E1560T0R delivers a low-noise 13.5 V rail suitable for powering RF power amplifiers in small-cell base stations, broadcast transmitters, and microwave backhaul radios. The SAC switching waveform rejects high-frequency harmonics outside the band of typical PoL regulators, allowing the BCM to be co-located near RF PAs without additional shielding. Up to 1 kW of 2 ms peak output power handles PA burst envelopes (such as LTE or 5G NR subframe peaks), and the 97.9 percent peak efficiency lets thermally constrained outdoor enclosures operate without dedicated heatsinks.
Recommended
Automotive 48 V Mild-Hybrid Systems
The NBM2317S60E1560T0R converts a 48 V mild-hybrid bus to a 12 V auxiliary rail in automotive power systems where belt-driven alternators have been replaced by 48 V generators. With bidirectional operation the module supports regenerative braking by stepping the 12 V battery back up to the 48 V rail during deceleration events, and the high power density (up to 4.5 kW/in3) minimises under-hood weight and volume. Designers should verify the component's qualification level against required automotive AEC-Q100 or OEM-specific reliability standards before deployment in production vehicles.
Recommended
Recommended Products Summary
Engineering reference data for NBM2317S60E1560T0R-VICOR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NBM2317S60D1560T0R | NBM2317S60C1560T0R | NBM2317S60E1252T0R | NBM2317S60E1880T0R |
|---|---|---|---|---|---|
| Brand | Vicor | Vicor | Vicor | Vicor | Vicor |
| Package | ChiP (Vicor Chip module) | ChiP (Vicor Chip module) - same | ChiP (Vicor Chip module) - same | ChiP (Vicor Chip module) - same | ChiP (Vicor Chip module) - same |
| Topology | SAC fixed K-factor 1/4 | SAC fixed K-factor 1/4 | SAC fixed K-factor 1/4 | SAC fixed K-factor 1/4 | SAC fixed K-factor 1/4 |
| Input Voltage Range | 38 V to 60 V | 38 V to 60 V | 38 V to 60 V | 38 V to 60 V | 38 V to 60 V |
| Output Voltage Nominal | 13.5 V | 13.5 V | 13.5 V | 12.5 V | 15.0 V |
| Output Current (step-down) | 60 A | 60 A | 60 A | 52 A | 80 A |
| Bidirectional Operation | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Sine Amplitude Converter topology delivers 97.9 % peak efficiency (vs Conventional square-wave isolated brick at 48 V to 12 V)
- Up to 4.5 kW/in3 power density in a ChiP package (vs Through-hole Vicor VI Brick or half-brick DC-DC converters)
- Bidirectional start-up and steady-state operation (vs Unidirectional bus converters requiring a second discrete path)
- Fixed K-factor 1/4 architecture with 1 kW 2 ms peak output (vs Lower-current competitors in the same 48 V bus role)
Design Notes
The ChiP surface-mount form factor relies on either two-sided cooling (thermal pads top and bottom) or bottom-side cooling through the PCB. The datasheet's Figure 37 thermal model is critical when computing junction rise: at 800 W continuous output and 54 V nominal input the conduction loss is approximately 17 W (97.9 % efficiency), and the junction-to-ambient thermal resistance of the bottom-side-cooled configuration is the limiting factor. Engineers should size the inner-layer copper pour to at least 2 oz across at least 25 mm x 25 mm under the package footprint to keep junction temperature below the rated maximum at 60 A continuous load. Reflow process must comply with J-STD-020 moisture sensitivity classification for the ChiP device.
Place the BCM with bulk input and output capacitors as close as practical to the ChiP pads - the low-AC-impedance characteristic of the SAC topology allows these capacitors to be relocated from the downstream PoL input to the BCM high side, but only if layout inductance from pad to bulk cap is minimised. Use a 2 oz or heavier copper stack and minimise via stubs in the high-current path; keep the return-current plane unbroken under the BCM pads. The ChiP is surface-mount, and the land pattern must exactly match the Vicor reference layout or the module's thermal pad connection will be compromised.
Do not assume output regulation from the BCM alone - the NBM2317S60E1560T0R is a fixed-K-factor device and cannot correct for line variation beyond its built-in K-scaling. Output voltage tracks input voltage at a 1/4 ratio, so input quality determines output quality. Pair the BCM with downstream regulation (PoL or another VTM/PRM stage) and ensure the upstream front-end converter keeps its output inside the BCM's 38 V to 60 V window under worst-case load transients and source tolerances. Exceeding 60 V input will exceed absolute-maximum ratings.
EMI mitigation for the BCM relies on the inherent sinusoidal SAC switching waveform, but additional layout techniques still apply: keep digital signal lines and sensitive analog circuits away from the ChiP edges and control pads, and ground the thermal pad with a tight via array to a continuous inner ground plane. Snubber pads are not required for SAC BCMs unlike conventional hard-switched brick converters, but adding a small RC snubber to the input is recommended when the upstream source impedance at the switching frequency exceeds 0.5 ohm.
Compliance Information
RoHS-compliant per Vicor product page (vicorpower.com, retrieved 2026-10-14). The BCM is not AEC-Q100 automotive-qualified - automotive applications should verify qualification with Vicor direct or select an explicitly automotive-graded Vicor part.
