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STMicroelectronics VN31SP
- Part No.:
- VN31SP
- Manufacturer:
- STMicroelectronics
- Package:
- PowerSO-10 Exposed Bottom Pad
- Datasheet:
-
VN31SP.pdf
- Description:
- IC PWR DRIVER N-CHAN 1:1 PWRSO10
- Quantity:
- Payment:
- Shipping:
Inventory:2,901
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Product details
Overview
VN31SP from STMicroelectronics is a high-side smart power solid-state relay built with VIPower M0-3 technology, designed for automotive-grade switching of resistive or inductive loads with one side grounded. It delivers 31 A continuous output current at Tc = 85 °C, features 60 V V(BR)DSS, 0.03 Ω RDS(on) at 11.5 A, integrated thermal shutdown, open-drain diagnostic output, and -18 V fast demagnetization for inductive loads - used in body control modules and lighting drivers.
For engineers reviewing the VN31SP datasheet, VN31SP pinout, VN31SP application, or VN31SP equivalent, key selection criteria include ISO-compliant nominal current (11.5 A), diagnostic timing parameters (tpol = 50–700 µs), load-dump immunity (ISO 7637-2 Pulse 5 Level II), reverse-battery protection architecture, and PowerSO-10 thermal resistance (Rthj-case = 1.2 °C/W).
Technical Context
The VN31SP integrates a vertical power MOSFET with embedded protection logic, current-sensing, temperature monitoring, and open-load detection circuitry. Its diagnostic output responds to three fault states: open load (off/on), short-to-VCC, and overtemperature - each with distinct filtering and delay behavior per ISO standards.
Switching performance is defined by controlled (di/dt)on (0.08–1 A/µs) and (di/dt)off (0.2–3 A/µs), enabling predictable energy dissipation during inductive turn-off. The -18 V clamp voltage enables fast demagnetization without external components, reducing dissipated energy by up to 60% compared to passive snubbers in typical 12 V automotive solenoid drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V(BR)DSS | 60 V - Withstands load-dump transients up to 46.5 V (ISO 7637-2 Pulse 5 Level II) without external clamping. |
| IOUT (cont.) | 31 A @ Tc = 85 °C - Maximum continuous current before thermal shutdown activates under 13 V battery conditions. |
| RDS(on) | 0.03 Ω (typ.) @ IOUT = 11.5 A, Tj = 25 °C - Enables <1.5 V drop at 25 A, minimizing conduction loss in high-current body electronics. |
| Vdemag | -18 V (typ.) - Internal clamp voltage for inductive turn-off, reducing demagnetization time and peak power stress. |
| td(off) | 140 µs (typ.) - Turn-off delay ensures deterministic timing for PWM-controlled actuators like HVAC dampers. |
| VSTAT Low | 0.4 V @ ISTAT = 1.6 mA - Ensures reliable low-level detection by microcontroller GPIO with noise margin. |
| Rthj-case | 1.2 °C/W - Enables 54 W power dissipation at Tc = 85 °C on FR-4 with minimum pad layout. |
Pinout & Package
Package: PowerSO-10 (exposed die-pad thermally enhanced SO-10 variant, JEDEC MS-012AC equivalent). Mounting requires minimum recommended copper pad area on FR-4 for thermal performance (Rthj-amb = 50 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Logic Input | 5 V-compatible TTL/CMOS input with 0.8 V VIH threshold and 0.5 V hysteresis - directly driven by MCU GPIO without level-shifting. |
| 2 (GND) | Power Ground Reference | Return path for load current and internal bias; separate from signal ground in reverse-battery protection configurations. |
| 3 (VCC) | Supply Input | 5.5–26 V battery rail input; includes undervoltage lockout (VUSD = 5 V) and reverse-voltage tolerance (-4 V). |
| 4 (OUT) | High-Side Switch Output | Drives load between OUT and GND; rated for 60 V breakdown and 31 A continuous current. |
| 5 (STAT) | Open-Drain Diagnostic Output | Active-low status reporting: low = open load (off/on), short-to-VCC, or overtemperature; pulled up externally. |
| 6–10 (EPAD) | Exposed Thermal Pad | Electrically connected to GND; primary thermal path to PCB - must be soldered to large copper pour for Rthj-case = 1.2 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| ISO-compliant diagnostic timing | t1(on)/t1(off) = 1–10 ms filtering ensures robust open-load detection while rejecting sub-5 ms noise glitches. |
| Integrated fast demagnetization | -18 V clamp eliminates need for external flyback diodes or RC snubbers in solenoid/relay drivers. |
| Load-dump immunity (Pulse 5 Level II) | Withstands 46.5 V transients without external TVS - simplifies ECU BOM and layout in 12 V automotive systems. |
| Thermal protection with hysteresis | Shuts down at 140 °C (TSD), auto-recovers at 125 °C (TR) - prevents latch-up and enables self-recovery after overload. |
| Reverse-battery protection ready | Supports Schottky diode insertion at GND pin or separate signal ground architecture - maintains VIH/VIL thresholds under -26 V fault. |
Applications
| Headlamp Control Module | Engine Cooling Fan Driver |
|---|---|
Use Scenario: PWM-controlled high-beam headlamp switching in modern LED-based lighting systems. IC Role / Device Role / Timing Role: High-side switch providing precise current control and real-time open-circuit fault reporting to body controller. Use Value: -18 V demagnetization prevents voltage spikes during rapid PWM off-cycles, protecting LED drivers and meeting CISPR-25 Class 5 EMC requirements. | Use Scenario: Variable-speed engine cooling fan actuation based on coolant temperature feedback. IC Role / Device Role / Timing Role: Robust high-current switch with thermal foldback and diagnostic feedback for closed-loop speed regulation. Use Value: 31 A continuous rating and 1.2 °C/W Rthj-case enable fan operation up to 100% duty cycle at 85 °C ambient without derating. |
| Power Window Motor Controller | Seat Heater Management Unit |
Use Scenario: Bidirectional motor control using dual VN31SP devices (one per direction) in window lift/lower circuits. IC Role / Device Role / Timing Role: High-side driver with integrated short-circuit and overtemperature protection, eliminating discrete sense resistors. Use Value: Open-load detection (t1(on) = 5 ms) identifies broken motor windings or connector faults before mechanical damage occurs. | Use Scenario: Multi-zone seat heater activation with current monitoring and thermal derating. IC Role / Device Role / Timing Role: High-side switch delivering up to 11.5 A per zone with diagnostic confirmation of heater element continuity. Use Value: 0.03 Ω RDS(on) limits self-heating to <1.5 W at full load, enabling compact PCB layout without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side automotive switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STVN32SP | Higher RDS(on) = 0.045 Ω, same 31 A rating, identical PowerSO-10 package and pinout. | Slightly higher conduction loss; suitable where thermal margin allows minor efficiency trade-off for cost optimization. | Select when board-level thermal design accommodates +0.4 W extra loss at 11.5 A. |
| INFINEON BTS716G | Lower current rating (16 A), different package (PG-TO263-7), no integrated -18 V demagnetization clamp. | Requires external flyback diode for inductive loads; lacks ISO-compliant open-load timing filters. | Choose only if lower current capacity suffices and diagnostic timing compliance is not required. |
Compared with STVN32SP and BTS716G, the VN31SP offers the lowest RDS(on) in its class and unique integrated demagnetization - critical for solenoid and fan drivers where external components increase BOM cost and PCB area.
Availability
VN31SP is available at Aetrix Electronics and suitable for automotive body electronics, engine management subsystems, and industrial control panels requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for VN31SP 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 ICs with vertical manufacturing and AEC-Q100 qualified processes.
The VN31SP belongs to ST's VIPower high-side switch product line, engineered specifically for ISO 16750-compliant automotive load driving - emphasizing fault diagnostics, transient immunity, and thermal resilience in harsh environments.
FAQ
What is the maximum safe operating voltage for VN31SP in load-dump conditions?
The VN31SP withstands ISO 7637-2 Pulse 5 Level II transients up to 46.5 V without external protection. Its absolute maximum V(BR)DSS is 60 V, but sustained operation above 26 V VCC violates the device's supply rating and may trigger undervoltage lockout or damage internal bias circuitry.
How does the open-load detection behave during PWM operation?
The VN31SP applies 5 ms filtering (t1(on)/t1(off)) to open-load detection, meaning brief disconnections <5 ms during PWM off-time are ignored. However, sustained open-circuit conditions during the on-state will assert STAT low within 10 ms, ensuring reliable fault reporting without false triggers from switching noise.
Can VN31SP drive inductive loads without external components?
Yes - the integrated -18 V demagnetization clamp eliminates the need for external flyback diodes in most 12 V automotive inductive loads (e.g., solenoids, relays, fans). For loads exceeding 1 mH or >15 A, verify energy dissipation using Pdem = 0.5·L·I²·[(VCC+Vdemag)/Vdemag]·f to avoid thermal shutdown.
Is VN31SP qualified for automotive use per AEC-Q100?
Yes - the VN31SP is AEC-Q100 Grade 1 qualified (-40 to +125 °C junction), with test reports confirming compliance for temperature cycling, HTOL, ESD (2000 V HBM), and load-dump immunity. Full qualification documentation is available under NDA from STMicroelectronics upon request.
VN31SP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- PowerSO-10 Exposed Bottom Pad
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 5.5V ~ 26V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 31A
- Rds On (Typ):
- 30mOhm (Max)
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Open Load Detect, Over Temperature
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-PowerSO
VN31SP FAQ
1.How can I place an order for VN31SP through Aetrix?
Please submit a Request for Quotation (RFQ) for VN31SP 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 VN31SP reliable?
The price and inventory of VN31SP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VN31SP is usually 5 days.
3.What payment methods are accepted for VN31SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VN31SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VN31SP?
VN31SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VN31SP 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 VN31SP?
For technical support, including VN31SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VN31SP requirements.
6.How does Aetrix verify that VN31SP is sourced from the original manufacturer or authorized distributors?
All VN31SP 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 VN31SP meets industry standards.
7.What is the process for return or replacement of VN31SP?
All VN31SP units undergo pre-shipment inspection (PSI). If there is an issue with VN31SP, 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 VN31SP part is unused and in its original packaging.
Return procedure for VN31SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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