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STMicroelectronics VNF1048FTR
- Part No.:
- VNF1048FTR
- Manufacturer:
- STMicroelectronics
- Category:
- Motor Drivers, Controllers
- Package:
- -
- Datasheet:
-
VNF1048FTR.pdf
- Description:
- CONTROLLER FOR EXTERNAL MOSFET W
- Quantity:
- Payment:
- Shipping:
Inventory:1,823
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Product details
Overview
VNF1048FTR from STMicroelectronics is a high-side switch controller IC with integrated eFuse protection, designed for intelligent power distribution in 12 V, 24 V, and 48 V automotive systems. It drives external P-channel MOSFETs, provides high-precision current sensing (±3% accuracy >20 mV), supports SPI-based diagnostics and configuration (3.3 V/5 V CMOS-compatible), and delivers robust thermal and overcurrent protection including configurable hard short latch-off and VDS desaturation detection.
For engineers reviewing the VNF1048FTR datasheet, VNF1048FTR pinout, VNF1048FTR application, or VNF1048FTR equivalent, this device serves as a programmable intelligent fuse replacement with real-time ADC-based monitoring of TJ, VNTC, VDS, VOUT, and ISNS, enabling precise load protection without compromising inrush tolerance.
Technical Context
The VNF1048FTR implements a dual-stage charge pump to generate gate drive voltage up to VS + 15.5 V for high-side P-MOSFET control, ensuring reliable turn-on across 6–70 V supply range. Its 32-bit ST-SPI interface supports register lock-out via HWLO pin and enables full configuration of protection thresholds-including 32-step overcurrent (6–90 mV), 16-step hard short (20–160 mV), and 31-step VDS desaturation (300–1800 mV).
Protection logic integrates time-domain eFuse emulation using INOM and tNOM parameters, calculating RMS current during PWM or transient switching to enforce I²t limits while avoiding nuisance trips. All critical analog inputs-ISNS_P/N, NTC, VDS-are digitized by dedicated 10-bit or 13-bit ADCs with sample rates up to 0.9 MSample/s for VDS and 2.4 kSample/s for current sense.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 6 V to 60 V operating; extended to 70 V transient - supports full automotive battery range including load dump. |
| Standby Current | 70 µA max - enables always-on power distribution nodes without excessive battery drain. |
| SPI Interface | 3.3 V/5 V CMOS-compatible, 8 MHz max clock - interoperable with common automotive MCUs without level-shifting. |
| Current Sense Accuracy | ±3% for VSENSE > 20 mV - enables precise eFuse trip timing and load monitoring with standard shunt resistors. |
| VDS Desat Detection | Configurable 300–1800 mV threshold in 50 mV steps - detects MOSFET failure before catastrophic thermal runaway. |
| Thermal Shutdown | 160–190 °C junction threshold with 15 °C hysteresis - protects IC and external FET under sustained overload. |
| eFuse Timing Range | tNOM programmable from 1 s to 511 s - matches wire harness I²t ratings while tolerating capacitive inrush. |
Pinout & Package
QFN32L EPAD (5.0 × 5.0 × 1.0 mm) with exposed thermal pad requiring PCB ground connection. Pin 1 = VSPI; Pin 32 = NC; TAB must be soldered to GND plane for thermal performance and EMI control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS | Battery input supply | Connects directly to 12/24/48 V rail; withstands 70 V transients - primary power path for high-side switching. |
| HS_GATE | High-side gate driver output | Drives external P-MOSFET gate with 12–15 V swing (VS > 10 V); includes UVLO blanking and deglitching. |
| ISNS_P / ISNS_N | Differential current sense inputs | Accepts shunt voltage up to 160 mV full-scale; enables bidirectional current measurement with ±3% accuracy. |
| NTC / NTC_M | External MOSFET temperature monitor | Interfaces with 10 kΩ NTC bridge; digitizes temperature via 10-bit ADC with 4.9 kSample/s rate. |
| CP1P / CP1M / CP2P / CP2M | Charge pump flying capacitor terminals | Supports dual-stage charge pump generating VCP up to VS + 15.5 V - ensures MOSFET enhancement across full VS range. |
| HWLO | Hardware register lock-out input | Active-high CMOS input (2.1 V min); permanently locks SPI registers when asserted - prevents runtime misconfiguration. |
| DIAG | Open-drain diagnostic output | Pulls low on fault conditions (WAKEUPM, DIAGS, or DE bits set); supports wired-OR fault bus in multi-channel systems. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable eFuse curve | INOM and tNOM set via SPI to match specific wire gauge I²t ratings - replaces mechanical fuses with adaptive protection. |
| Multi-threshold overcurrent protection | Three independent trip levels: hard short (20–160 mV), overcurrent (6–90 mV), and VDS desat (300–1800 mV) - enables layered fault response. |
| Integrated analog-to-digital conversion | Five dedicated ADCs (TJ, VNTC, VDS, VOUT, ISNS) with sample rates from 2.4 kSample/s to 0.9 MSample/s - eliminates need for external monitoring ICs. |
| Robust SPI interface | 32-bit ST-SPI with CSN timeout (30–70 ms), watchdog toggle bit (50–200 ms), and register lock-out - ensures deterministic host communication in noisy environments. |
| Fail-safe architecture | Independent undervoltage shutdown (4.5 V), thermal shutdown (160–190 °C), and external FET overtemperature detection - meets ASIL-B functional safety requirements. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) Power Distribution |
|---|---|
Use Scenario: Managing power to lighting, wipers, and door locks in modern BCMs with centralized load switching. IC Role / Device Role / Timing Role: High-side switch controller providing eFuse-protected 12 V outputs with SPI-configurable trip thresholds and diagnostics. Use Value: Eliminates discrete fuses and relays while enabling predictive maintenance via real-time current and temperature telemetry. | Use Scenario: Distributing switched 24 V/48 V power to fuel injectors, solenoids, and sensors in commercial vehicle ECUs. IC Role / Device Role / Timing Role: Intelligent high-side driver with VDS desaturation detection and hard-short latch-off to prevent MOSFET destruction during coil short events. Use Value: Reduces system-level failure rate by detecting early-stage MOSFET degradation before thermal runaway occurs. |
| Advanced Driver Assistance Systems (ADAS) | Electric Power Steering (EPS) |
Use Scenario: Powering radar modules, camera systems, and ultrasonic sensors requiring clean, protected 12 V supplies. IC Role / Device Role / Timing Role: SPI-controlled high-side switch with ultra-low standby current (70 µA) and fast diagnostic reporting via DIAG pin. Use Value: Enables always-on sensor operation without compromising vehicle battery life; DIAG signal allows immediate fault isolation during CAN bus diagnostics. | Use Scenario: Controlling motor phases and auxiliary loads in EPS systems where reliability and thermal management are critical. IC Role / Device Role / Timing Role: Dual-stage charge pump driver for high-side P-MOSFETs with integrated NTC-based MOSFET temperature monitoring and overtemperature shutdown. Use Value: Prevents EPS motor stall-induced thermal damage by correlating current, VDS, and MOSFET junction temperature in real time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side switch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INFINEON BTS724G | Monolithic high-side switch (integrated MOSFET); no external FET support; fixed protection thresholds; no SPI interface. | Targeted at lower-current (< 10 A), cost-sensitive applications where programmability and diagnostics are secondary. | Select when board space is constrained and only basic ON/OFF control with fixed protection is required. |
| TEXAS INSTRUMENTS TPS4H160-Q1 | Monolithic 4-channel high-side driver; integrated MOSFETs; SPI interface; but lacks eFuse I²t programming and NTC-based MOSFET thermal monitoring. | Optimized for multi-load distribution with channel independence; limited single-channel current capability vs. VNF1048FTR's external FET scalability. | Select for compact multi-output designs where per-channel diagnostics suffice and external FET flexibility is unnecessary. |
Compared with BTS724G and TPS4H160-Q1, the VNF1048FTR uniquely combines external MOSFET control, fully programmable eFuse timing, and five-channel ADC-based health monitoring - making it optimal for high-reliability, high-current automotive power distribution where adaptability and failure forensics are essential.
Availability
VNF1048FTR is available at Aetrix Electronics and suitable for body control modules, engine control units, ADAS domain controllers, and electric power steering systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified performance.
Supply support for VNF1048FTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with broad IP portfolio and AEC-Q100 design expertise.
The VNF1048FTR belongs to ST's VIPower™ family of intelligent power switches, engineered specifically for automotive power distribution architectures demanding programmable protection, diagnostic transparency, and functional safety compliance.
FAQ
What is the maximum continuous load current supported by the VNF1048FTR?
The VNF1048FTR itself does not define a maximum load current - it controls an external P-channel MOSFET whose current rating depends on RDS(on), thermal design, and PCB layout. The IC supports current sensing up to 160 mV differential input, enabling precise eFuse configuration for loads from sub-amp to >100 A with appropriate shunt and FET selection.
Does the VNF1048FTR require external components for charge pump operation?
Yes - two external flying capacitors (CP1 and CP2) are mandatory for dual-stage charge pump operation. CP1 and CP2 must be low-ESR ceramic capacitors (typically 100 nF each) placed close to CP1P/CP1M and CP2P/CP2M pins. No external inductor or diode is required, distinguishing it from bootstrap-based drivers.
How is the eFuse trip time calibrated for different wire gauges?
eFuse trip time is configured via SPI registers VOC_THRS (sets INOM = VSENSE/RSENSE) and T_NOM (sets base time step from 1–511 s). The internal stepwise I²t algorithm automatically scales trip timing based on measured RMS current, allowing direct mapping to AWG-specific I²t curves without firmware calculation.
Can the VNF1048FTR operate without an external NTC thermistor?
Yes - the NTC circuit is optional. If unused, NTC and NTC_M pins must be left unconnected or tied to GND per datasheet guidance. All other protections (overcurrent, VDS desat, thermal shutdown) remain fully functional; only external MOSFET temperature monitoring is disabled.
VNF1048FTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- -
- Function:
- -
- Output Configuration:
- -
- Interface:
- -
- Technology:
- -
- Step Resolution:
- -
- Applications:
- -
- Current - Output:
- -
- Voltage - Supply:
- -
- Voltage - Load:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
VNF1048FTR FAQ
1.How can I place an order for VNF1048FTR through Aetrix?
Please submit a Request for Quotation (RFQ) for VNF1048FTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for VNF1048FTR reliable?
The price and inventory of VNF1048FTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VNF1048FTR is usually 5 days.
3.What payment methods are accepted for VNF1048FTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VNF1048FTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VNF1048FTR?
VNF1048FTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VNF1048FTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for VNF1048FTR?
For technical support, including VNF1048FTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VNF1048FTR requirements.
6.How does Aetrix verify that VNF1048FTR is sourced from the original manufacturer or authorized distributors?
All VNF1048FTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VNF1048FTR meets industry standards.
7.What is the process for return or replacement of VNF1048FTR?
All VNF1048FTR units undergo pre-shipment inspection (PSI). If there is an issue with VNF1048FTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The VNF1048FTR part is unused and in its original packaging.
Return procedure for VNF1048FTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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