NBM2317S60D1580TMR - 1080W Non-Isolated Bus Converter | Vicor
MPN: NBM2317S60D1580TMR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $87.23 | $87.23 |
| 10 | $80.05 | $800.50 |
| 100 | $73.5 | $7,350.00 |
| 500 | $68 | $34,000.00 |
| 1,000 | $63.5 | $63,500.00 |
NBM2317S60D1580TMR Overview
What is a non-isolated bus converter? A non-isolated bus converter (NIBC) is a fixed-ratio DC-DC converter used as a virtual supply rail in distributed power architectures. Unlike a switching regulator, an NIBC divides an existing high-voltage bus into a lower-voltage sub-rail using a capacitive energy-transfer topology. NIBC sits in the power-converter hierarchy as a category between point-of-load regulators and isolated DC-DC converters, providing high step-down ratios without transformer isolation.
Key features of the NBM2317S60D1580TMR include a continuous 800W power rating, fixed 4:1 conversion ratio, 1.4 MHz switching frequency, parallelable operation for higher power, and bi-directional power flow capability. Typical conversion efficiency reaches 97.9% at nominal 48V/12V operation, reducing thermal losses compared to traditional buck converters at the same current rating.
The NBM family from Vicor uses a proprietary Sinusoidal Amplitude Converter (SAC) topology combined with a zero-voltage, zero-current switching (ZVZCS) soft-switching architecture. This topology achieves high efficiency by eliminating switching losses and uses small ceramic bypass capacitors instead of bulky inductors or transformers. The result is a low-profile surface-mount module that fits between a 48V intermediate bus and downstream 12V point-of-load converters or direct loads.
Typical applications include 12V intermediate bus generation in 48V telecom and data-center servers, AI accelerator and GPU auxiliary rails, high-current 12V distribution in industrial equipment, battery energy storage systems using 48V architecture, and bridging converters for automotive 48V mild-hybrid systems.
When designing with this part, account for the fixed 4:1 conversion ratio: VOUT follows VIN/4 with a tolerance band. Use the module in conjunction with downstream buck or ZVS regulators for sub-ratios (5V, 3.3V, 1V). Provide adequate PCB copper beneath the surface-mount land pattern for thermal dissipation and high-current return paths.
This page synthesizes distributor pricing, drop-in module equivalents, and paralleling notes not found in the manufacturer datasheet.
Drop-in alternatives for NBM2317S60D1580TMR — 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 NBM2317S60D1580TMR (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:
NBM2317S60D1580T0R
✅ Drop-In✓ In Stock
$59.95 / Unit
View Datasheet →NBM2317S60E1580TMR
✅ Drop-In📋 Reference alternative (not in catalog)
NBM2317S60E1560T0R
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$60.4 / Unit
View Datasheet →NBM2317S60D1580TMR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$63.5 / Unit
View Datasheet →NBM3623S60D1580T0R
✅ Drop-In📋 Reference alternative (not in catalog)
NBM2317S60D1580TMR Maximum Ratings & Electrical Characteristics
| Manufacturer | Vicor |
| Series | NBM2317 (Chameleon SMD) |
| Topology | Non-Isolated Bus Converter (SAC, fixed ratio 4:1) |
| Conversion Ratio (K) | 1/4 (K=0.25) |
| High-Side Input Voltage Range | 40 V to 60 V |
| Low-Side Output Voltage Range | 10 V to 15 V (ratiometric) |
| Continuous Output Power | 800 W |
| Peak Output Power | 1080 W |
| Maximum Output Current | 80 A |
| Peak Efficiency | 97.9% at 48V to 12V |
| Switching Frequency | 1.4 MHz (typical) |
| Operating Temperature | -40 C to +125 C |
| Storage Temperature | -55 C to +125 C |
| Package | Vicor 2317 Chameleon SMD |
| Mounting Type | Surface Mount (SMD) |
| Isolation Voltage | Non-Isolated |
| Power Direction | Bidirectional |
| Parallelable | Yes, for higher power |
| Cooling | Conduction-cooled via PCB land pattern |
| RoHS Status | Compliant |
NBM2317S60D1580TMR vicor 2317 chameleon smd Pin Configuration Guide
Pin configuration for NBM2317S60D1580TMR (vicor 2317 chameleon smd 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 NBM2317S60D1580TMR.
Refer to the datasheet for full pin configuration.
Typical Applications
NBM2317S60D1580TMR is suitable for 6 applications: 48V to 12V Data-Center Intermediate Bus, AI Accelerator and GPU Auxiliary Power, Telecom 48V Base-Station Power Architecture, Battery Energy Storage 48V Systems, Industrial High-Current 12V Distribution, Automotive 48V Mild-Hybrid Systems.
48V to 12V Data-Center Intermediate Bus
The NBM2317S60D1580TMR is purpose-built for 48V-to-12V intermediate bus generation in hyperscale data centers, AI compute racks, and telecom central offices. Its fixed 1/4 conversion ratio maps a 48V nominal high-side bus to a 12V low-side rail at 800W continuous and 1080W peak, while the 97.9% peak efficiency minimizes thermal load in dense server chassis. Operating the downstream 12V PoL converters (Vicor PI33xx ZVS or equivalent) from this bridged rail reduces distribution I^2R losses compared to running the entire rack at 12V. Place the module directly above the PCB copper land pattern that fans out to the downstream regulators, using 2 oz copper or heavier to handle 80A.
Recommended
AI Accelerator and GPU Auxiliary Power
GPU and AI accelerator cards increasingly use 48V distribution to reduce cable losses, with on-card 12V rails derived from bus converters. The NBM2317S60D1580TMR provides up to 80A on the low-side, sufficient to feed multiple GPU auxiliary rails (PEX, memory, fans) with a single module. Its 1.4 MHz SAC switching frequency keeps output ripple low, which is critical for clean GPU power delivery, and its small Chameleon footprint allows routing close to the load. Pair with downstream Vicor ZVS regulators for 1.0V-3.3V core voltages; the 800W continuous headroom covers peak transient load steps during inference workloads.
Recommended
Telecom 48V Base-Station Power Architecture
In 4G and 5G base-station power systems, the NBM2317S60D1580TMR accepts the 48V battery bus (40-60V) and produces a regulated-rail 12V-15V low-side output for RF power amplifiers, fans, and auxiliary circuitry. Its bidirectional capability supports energy recovery scenarios when the -48V bus is backed by lithium batteries with bidirectional charge/discharge logic. The 97.9% efficiency cuts dissipated heat inside sealed outdoor cabinets, reducing cooling requirements in thermally constrained enclosure designs.
Recommended
Battery Energy Storage 48V Systems
Battery energy storage systems (BESS) and 48V e-mobility packs benefit from the NBM2317S60D1580TMR's bidirectional power flow, which allows seamless transition between charge (12V-side to 48V-side) and discharge (48V-side to 12V-side) directions. The 800W continuous per module supports 12V accessory loads (BMS, contactors, communications) directly from the high-voltage pack bus without an isolated converter. Multiple modules can be paralleled to scale; in a typical 5kW BESS rack, six paralleled units provide 4.8kW of auxiliary power.
Recommended
Industrial High-Current 12V Distribution
Industrial automation and robotics systems requiring high sustained 12V current (motor amplifiers, PLC I/O, motion controllers) can use the NBM2317S60D1580TMR to translate a 48V factory bus into a regulated-rail 12V/80A sub-rail. The fixed 4:1 ratio simplifies design—no feedback loop tuning required—and the parallelable architecture enables scaling to 160A or 240A with two or three modules. Industrial-grade -40 C to +125 C operating temperature allows deployment in unconditioned factory-floor cabinets.
Recommended
Automotive 48V Mild-Hybrid Systems
Automotive 48V mild-hybrid architectures use a 48V bus alongside the legacy 12V system. The NBM2317S60D1580TMR bridges the 48V bus to the 12V battery/load bus at 800W, feeding lights, infotainment, ECU power, and 12V accessories from the higher-voltage bus. Its high efficiency reduces engine-bay thermal stress compared to discrete buck converters at the same power level. Note that for full AEC-Q100 automotive qualification, contact Vicor for the automotive-screened variant of the NBM family.
Recommended
Recommended Products Summary
Engineering reference data for NBM2317S60D1580TMR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NBM2317S60D1580T0R | NBM2317S60E1580TMR | NBM2317S60E1560T0R | NBM3623S60D1580T0R |
|---|---|---|---|---|---|
| Brand | Vicor | Vicor | Vicor | Vicor | Vicor |
| Package | 2317 Chameleon SMD | 2317 Chameleon Through-Hole - same die | 2317 Chameleon SMD - identical | 2317 Chameleon Through-Hole | 3623 ChiP Through-Hole (larger) |
| Input Voltage Range | 40 V to 60 V | 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 (ratiometric) | 10 V to 15 V (ratiometric) | 10 V to 15 V (ratiometric) | 10 V to 15 V (ratiometric) | 10 V to 15 V (ratiometric) |
| Continuous Output Power | 800 W | 800 W | 800 W | 800 W | 800 W |
| Peak Output Current | 80 A | 80 A | 80 A | 80 A | 80 A |
| Peak Efficiency | 97.9% | 97.9% | 97.9% | 97.9% | 97.5% |
| Conversion Ratio | 1/4 (K=0.25) | 1/4 | 1/4 | 1/4 | 1/4 |
| Mounting Type | Surface Mount (SMD) | Through-Hole | Surface Mount | Through-Hole | Through-Hole |
| Topology | Non-isolated SAC bus converter | Non-isolated SAC bus converter | Non-isolated SAC bus converter | Non-isolated SAC bus converter | Non-isolated SAC bus converter (3623 ChiP) |
| Bidirectional | Yes | Yes | Yes | Yes | Yes |
| RoHS | Compliant | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Highest power density in its class via proprietary Chameleon SMD packaging (vs NBM3623S60D1580T0R)
- Surface-mount compatibility for automated assembly (vs NBM2317S60D1580T0R)
- Bidirectional power flow in a single non-isolated module (vs Discrete buck + boost converters)
- Vicor SAC topology eliminates bulky magnetics (vs Conventional buck regulators at 800W)
Design Notes
At 800W continuous with 97.9% peak efficiency, worst-case power dissipation is approximately 17W (100% minus efficiency at full load). Per the Vicor datasheet, the 2317 Chameleon SMD package is conduction-cooled via the PCB land pattern—use a minimum of 2 oz copper on top and bottom layers directly beneath the module, and consider a thermal via array in the land pattern to spread heat into an internal copper plane. Estimated: at 17W dissipation on a 1 square-inch 2 oz copper area, junction temperature rise is approximately 25 C above ambient; verify with the thermal derating curve in the datasheet for your specific PCB stack-up.
Follow the land pattern exactly as specified in the Vicor NBM2317 datasheet for the 2317 Chameleon SMD package. Use ENIG or immersion-silver surface finish for the high-current pads to prevent oxidation; HASL is not recommended. Route the 80A low-side output with multiple parallel PCB traces or an inner copper plane—the Vicor reference design shows a 4-layer stack-up with 2 oz copper on outer layers dedicated to VIN/VOUT/GND return paths. Place bypass ceramic capacitors (1 uF X7R minimum, 10 uF bulk) within 5 mm of the high-side input pads per the Vicor reference design.
Do not connect the NBM2317S60D1580TMR's input to voltages outside the 40-60V range—transients above 60V will trigger OVP and below 36V will disable the converter via UVLO. Do not load the module with a fixed-voltage load that does not behave as a ratiometric load—the 1/4 conversion ratio is fixed, so VOUT will track VIN/4, not a constant 12V reference. Do not bypass the input fuse: an 80A capable fuse or circuit breaker is required per the Vicor safety guidelines; failed modules can deliver high fault currents.
Keep the high-side VIN loop area and low-side VOUT loop area as small and physically separated as possible to minimize switching noise coupling. The Vicor reference design uses split inner planes with a small bridge under the module to provide a clean return path for both domains simultaneously. Place current-mode control and feedback components on the low-side only, and route gate-drive signals on an inner layer adjacent to a solid GND plane to avoid noise pickup.
Compliance Information
RoHS and REACH compliant per Vicor product page. Not AEC-Q100 qualified for automotive—contact Vicor for the automotive-screened variant. Halogen-free status not explicitly stated in the provided data.
