TPS16851VMAR - 80V 20A eFuse Hot Swap Controller VMA | TI
N.º de pieza: TPS16851VMAR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.5 | $6,50 |
| 10 | $5.85 | $58,50 |
| 100 | $5.2 | $520,00 |
| 500 | $4.65 | $2.325,00 |
| 1.000 | $4.1 | $4.100,00 |
TPS16851VMAR Descripción general
What is an eFuse/Hot Swap Controller? An eFuse (electronic fuse) is a semiconductor protection device that replaces a traditional blade fuse with solid-state hot-swap control. A hot swap controller manages the safe insertion and removal of circuit boards or loads into a live power bus, controlling inrush current and providing protection against overloads, short circuits, and transients. The taxonomy is: eFuse -> hot swap controller -> power management IC -> semiconductor. Unlike a simple fuse, an eFuse can auto-retry or latch off, report faults via digital signals, and integrate current/temperature sensing.
Key features include the 80V continuous input operating range, 92V transient tolerance, integrated low-RON FET, accurate current monitor output (IMON), adjustable current-limit, fast short-circuit response, thermal shutdown, and a fault output (FLT) pin. The active-high enable pin allows sequencing with upstream converters, and the PROG pin sets the current-limit threshold with a single external resistor. The integrated MOSFET eliminates the need for external sense resistors and external FETs, reducing PCB area in 20A rails.
The architecture uses a charge-pump-driven N-channel MOSFET with a high-side monolithic switch, achieving low RON at high currents. The LQFN-CLIP package uses a top-side clip for low thermal impedance and high current capability, supporting 20A continuous operation with proper PCB thermal design. The stackable feature means TPS1685x devices can be paralleled for higher-current rails.
Typical applications include 48V telecom/datacom power distribution, server backplane protection, industrial PLC I/O power rails, battery management systems, and eMobility/USB-PD high-current paths. The wide VIN range and integrated FET make it a strong choice for AI server 48V distribution and multi-amp industrial loads. Compared to a discrete hot-swap solution with external FETs and sense resistors, the TPS16851VMAR simplifies BOM and improves accuracy.
A key design consideration is thermal management: at VIN=48V and 20A load with 3.65mΩ RON, the conduction loss is approximately 3.5W (Estimated: P = I2R = 20*20*0.00365 = 1.46W steady-state, higher during fault events). The LQFN-CLIP package provides low theta-JC, but PCB copper area and airflow still need consideration. Adding sufficient input capacitance and TVS protection is recommended for robust hot-plug behavior in 48V systems.
This page synthesizes distributor pricing, drop-in TPS1685x family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternativas directas para TPS16851VMAR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TPS16850PLGR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS16851VMAT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS16850VMAR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS16851VMAGR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS16851VMAR-LR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS16852
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS16851VMAR Especificaciones
| Product Type | Integrated Hot Swap eFuse |
| Input Operating Voltage Range | 9 V to 80 V |
| Absolute Maximum Input Voltage | 92 V |
| Negative Output Withstand | -5 V (at OUT) |
| On-Resistance (RON, typ) | 3.5 mΩ (3.65 mΩ datasheet typical) |
| Continuous Output Current | 20 A |
| Number of Channels | 1 |
| Enable Input | Active-high, with adjustable UVLO |
| Current Monitor Output | Accurate and fast IMON |
| Limitación de corriente | Adjustable via PROG pin |
| Fault Output | Yes (FLT pin) |
| Stackable | Yes |
| Rango de temperatura de funcionamiento | -40°C to +125°C |
| Encapsulado | LQFN-CLIP (VMA) 23-pin, 6x5 mm |
| Tipo de montaje | Surface Mount (top-side clip) |
| Estado RoHS | Compliant |
| Nivel MSL | 2 |
Configuración de pines de TPS16851VMAR
| Pin 1 | VIN — Input power supply (9V to 80V, 92V abs max) |
| Pin 2 | VIN — Input power supply |
| Pin 3 | VIN — Input power supply |
| Pin 4 | VIN — Input power supply |
| Pin 5 | GND — Ground reference |
| Pin 6 | EN/UVLO — Active-high enable with adjustable UVLO threshold |
| Pin 7 | PROG — Current limit programming via external resistor |
| Pin 8 | IMON — Current monitor output (analog) |
| Pin 9 | FLT — Fault output (open drain, asserts on protection event) |
| Pin 10 | TMR — Fault timer / dVdt programming |
| Pin 11 | PG — Power good indicator |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | VOUT — Switched output to load |
| Pin 15 | VOUT — Switched output to load |
| Pin 16 | VOUT — Switched output to load |
| Pin 17 | VOUT — Switched output to load |
| Pin 18 | VOUT — Switched output to load |
| Pin 19 | VOUT — Switched output to load |
| Pin 20 | VOUT — Switched output to load |
| Pin 21 | VOUT — Switched output to load |
| Pin 22 | VOUT — Switched output to load |
| Pin 23 | PAD — Thermal pad/exposed paddle (connect to GND pour for cooling) |
Aplicaciones típicas
TPS16851VMAR es adecuado para 6 aplicacións: 48V AI Server Power Distribution, 48V Telecom and Datacom Hot Swap, Industrial PLC and 24V Factory Automation, Battery Management System Protection, USB-PD and High-Current Charging Ports, Automotive 48V Mild-Hybrid Power Rails.
48V AI Server Power Distribution
The TPS16851VMAR is purpose-built for 48V rails in hyperscale AI server racks where direct 48V-to-1V conversion via downstream multiphase converters replaces 12V stages. The 80V continuous rating tolerates 50V nominal plus transient spikes up to 80V, while the integrated 3.5mΩ FET delivers 20A continuous with only 1.46W conduction loss per device (Estimated). Stackable paralleling allows >100A rails for GPU/TPU compute trays where multiple TPS16851VMAR devices share a current-monitor bus. The accurate IMON output reports per-rail current to platform telemetry, supporting per-cabinet power capping. Compared to discrete hot-swap designs with external FETs and shunt resistors, the TPS16851VMAR simplifies BOM and improves current sense accuracy at 20A.
Recomendado
48V Telecom and Datacom Hot Swap
In telecom and datacom equipment the TPS16851VMAR protects linecards and port cards from hot-plug inrush and short-circuit events on -48V nominal buses that swing above ground. The 9V-80V input window covers the full legacy telecom range plus positive surges, and the -5V output withstand handles ringing transients common in backplane connector hot-plug. The active-high enable with adjustable UVLO enables clean power-up sequencing matched to upstream OR-ing controllers. Integrated current monitor and fault output drive central management controllers for remote diagnostics. The LQFN-CLIP 6x5 mm package is thermally capable of 20A continuous on a properly designed 4-layer PCB without external heatsinks.
Recomendado
Industrial PLC and 24V Factory Automation
The TPS16851VMAR supports industrial 24V PLC, drive, and factory automation rails where robust hot swap is required for modular I/O insertion under load. The 9V-80V range covers 24V nominal with wide tolerance for inductive spikes, and the integrated 3.5mΩ FET supports high-current motor-control auxiliary rails. Adjustable current limit via the PROG pin lets designers set per-channel protection tailored to motor surge currents. The active-high enable supports interlock with safety circuits, and the fault output communicates with PLC controllers for remote shutdown. AEC-Q100 testing is available on related variants for harsher manufacturing environments.
Recomendado
Battery Management System Protection
In high-voltage battery management systems (BMS) for eMobility, the TPS16851VMAR provides pre-charge and inrush control with the 92V absolute max tolerating fast transient overshoots during relay switching. The integrated current monitor reports per-pack current to the BMS controller for state-of-charge calculation. Accurate current sensing at 20A and the low 3.5mΩ RON minimize I2R loss during normal charge/discharge. Stackable operation supports multi-battery configurations where >20A continuous charge rates are required. Active-high enable allows pack-level isolation controlled by BMS logic.
Recomendado
USB-PD and High-Current Charging Ports
The TPS16851VMAR enables fully protected USB-PD EPR (Extended Power Range) ports and proprietary high-current charging interfaces that run on 20V/28V/36V/48V nominal bus. The 80V input tolerance accommodates PD overshoot events, and the -5V output withstand protects against cable inductance transients. Accurate current monitor reports actual load current to the PD controller for compliance messaging. Stackable paralleling enables >100A shared-capability charging rails in ultra-fast EV charging stations. Adjustable current limit and PROG pin allow per-port current setting in multi-USB-PD application designs.
Recomendado
Automotive 48V Mild-Hybrid Power Rails
For automotive 48V mild-hybrid systems (MHEV), the TPS16851VMAR provides hot-swap protection for sub-modules on the 48V bus. The 80V continuous rating tolerates load-dump and jump-start transients common in 48V MHEV networks, and the integrated 3.5mΩ RON minimizes conduction loss in 20A-continuous accessory rails. Active-high enable integrates with BCM power-sequencing logic, and the fault output reports over-current events to the body controller. For this application, related TPS1685x AEC-Q100 qualified variants should be selected to meet automotive quality standards rather than the standard TPS16851VMAR grade.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TPS16851VMAR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TPS16850PLGR | TPS16851VMAT | TPS16850VMAR | TPS16852 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | LQFN-CLIP (VMA) 23-pin, 6x5 mm | LQFN-CLIP (VMA) 23-pin, 6x5 mm - same | LQFN-CLIP (VMA) 23-pin, 6x5 mm - same | LQFN-CLIP (VMA) 23-pin, 6x5 mm - same | LQFN-CLIP (VMA) 23-pin, 6x5 mm - same |
| Input Operating Voltage | 9 V to 80 V | 9 V to 80 V | 9 V to 80 V | 9 V to 80 V | 9 V to 80 V |
| On-Resistance (RON) | 3.5 mΩ typ (3.65 mΩ datasheet) | 3.5 mΩ | 3.5 mΩ | 3.5 mΩ | 3.5 mΩ |
| Continuous Output Current | 20 A | 20 A | 20 A | 20 A | 20 A |
| Negative Output Withstand | -5 V | -5 V | -5 V | -5 V | -5 V |
| Stackable | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
Diferenciadores clave
- Highest continuous current integrated eFuse in VMA package family at 80V (frente a TPS16850PLGR)
- Same VMA-23 footprint as TPS16851VMAT but with standard reel orientation (frente a TPS16851VMAT)
- Wide 80V operating range with -5V output withstand unique to TPS1685x family (frente a TPS16852)
Notas de diseño
Estimated: at 20A continuous with RON of 3.65mΩ, steady-state conduction loss is approximately 1.46W (P = I²×R = 400×0.00365). However, during fault events or steady overload current may rise to 30-40A, pushing dissipation briefly to 4-6W. The LQFN-CLIP 6x5 mm package achieves low junction-to-case resistance via its top-side clip - PCB thermal design should connect the exposed thermal pad to a large copper pour (≥1 oz Cu, with thermal vias to inner planes) to keep junction temperature below 125°C. Without 4-layer thermal management, derate by ~30% or add active airflow.
Place input bulk capacitance (typically 1-10 µF ceramic + 100 µF electrolytic) directly at the VIN pins to suppress hot-plug inrush and ringing. Route VIN and VOUT traces as wide as possible (≥0.5 oz or 50 mil) to handle 20A continuous. Place the PROG resistor close to the IC with a short trace, and add a 0.1 µF ceramic on the EN/UVLO pin for noise immunity. The exposed thermal pad must be soldered to a matched land pattern for thermal performance; missing this can cause thermal shutdown at 50% of rated current.
Common pitfalls when using the TPS16851VMAR include (1) omitting the input TVS protection - add a bidirectional TVS rated above 92V to handle hot-plug transients, (2) setting UVLO threshold too low - this causes unintended restart in 48V systems under brownout, (3) relying solely on datasheet typical RON of 3.5mΩ - at hot temperatures RON can rise 30-50%, derate accordingly, (4) attempting to parallel devices without following datasheet paralleling guidelines - imbalance can cause one device to handle most of the current and trip fault. Always follow TI's TPS1685x user guide for stackable operation and IMON calibration.
Keep high-current loops (VIN→FET→VOUT) physically small to minimize inductance and ringing during switching events. Use a star-ground layout with the IC ground pin close to its bypass capacitor ground return. The IMON trace should be shielded from switching edges and routed differentially or guarded if long. The PROG pin current-setting resistor must be placed within 5 mm of the IC to minimize noise pickup. Reference the TPS1685x datasheet layout example PCB artwork for exact component placement guidance.
Información de cumplimiento
RoHS compliant per TI product page. The TPS16851VMAR is the standard grade; AEC-Q100 qualified variants exist within the TPS1685x family for automotive 48V MHEV use cases (data not present in the verified web data - verify with TI representative).
