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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Distribution Switches, Load Drivers

STMicroelectronics VNI4140K-32

Name: VNI4140K-32
Brand: STMicroelectronics
SKU: VNI4140K-32
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VNI4140K-32

Manufacturer:: STMicroelectronics

Category:: Power Distribution Switches, Load Drivers

Package:: 24-PowerBSOP (0.295", 7.50mm Width)

Datasheet:: VNI4140K-32.pdf

Description:: IC PWR DRVR N-CHAN 1:1 PWRSSO24

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Product details

Overview

VNI4140K-32 from STMicroelectronics is a quad-channel high-side smart power solid-state relay realized in VIPower™ technology, designed to drive DC-13 loads per EN 60947-5-1 with 1.0 A continuous output current per channel, 0.14 Ω typical R_DS(on) at 0.5 A and 25 °C, and integrated per-channel overtemperature and short-circuit protection. It operates from 10.5 V to 36 V supply, supports 3.3 V/5 V CMOS/TTL inputs, and delivers fast demagnetization for inductive loads in industrial control systems.

For engineers reviewing the VNI4140K-32 datasheet, VNI4140K-32 pinout, VNI4140K-32 application, or VNI4140K-32 equivalent, key selection criteria include per-channel thermal fault reporting via open-drain STATUS pins, non-simultaneous channel restart under case overtemperature, loss-of-GND protection, and compliance with IEC61000-4-4/4-5 and IEC61131-2 for harsh industrial environments.

Technical Context

This device implements four independent high-side power switches with active current limiting, junction- and case-level thermal shutdown (TTSD = 150–190 °C; TCSD = 125–135 °C), and hysteresis-based automatic recovery (TR = 135 °C; TCR = 110 °C). Each channel features dedicated open-drain STATx pins that assert low during overtemperature events.

The internal charge pump enables robust high-side operation without external bootstrap components; it runs at 1.45 MHz and supports fast switching (t_PD(H-L) ≤ 36 µs, t_PD(L-H) ≤ 35 µs) into resistive, capacitive (up to 300 µF), and inductive loads while maintaining EN 60947-5-1 DC-13 rating and ±25 kV ESD immunity per IEC61000-4-2.

Key Specifications

Parameter	Value and Actual Design Meaning
Output current per channel	1.0 A continuous (DC), enabling direct driving of solenoids, valves, and contactors per EN 60947-5-1 DC-13.
R_DS(on)	0.14 Ω typical at I_OUT = 0.5 A, T_J = 25 °C - minimizes conduction loss and self-heating in high-duty-cycle applications.
Supply voltage range	10.5 V to 36 V - supports wide industrial rail voltages including 24 V nominal systems with brownout margin.
Input logic compatibility	3.3 V and 5 V CMOS/TTL - ensures interoperability with PLC I/O modules, microcontrollers, and FPGA GPIOs.
Status pin type	Open-drain STATx outputs - allow wired-OR fault aggregation and direct interface to 3.3 V/5 V interrupt controllers.
Demagnetization voltage	V_CC − 45 V typical - provides strong flyback energy clamping for fast turn-off of inductive loads ≥1 mH.
Capacitive load limit	300 µF at V_CC = 24 V, T_AMB = 125 °C - defines safe switching boundary for large capacitive bus interfaces.

Pinout & Package

Delivered in PowerSSO-24 package (10.1 mm × 7.4 mm × 2.47 mm height), featuring exposed thermal pad (TAB connected to VCC) and optimized copper layout for junction-to-case thermal resistance of 2 °C/W per channel.

Pin/Terminal	Circuit Role	Design Meaning
1, TAB	VCC	Main supply input; TAB is electrically connected to VCC and serves as primary thermal path to PCB copper.
2, 4, 8, 10	IN1–IN4	CMOS/TTL-compatible logic inputs controlling respective high-side channels; VIH = 2.2 V, VIL = 0.8 V.
3, 5, 7, 9	STAT1–STAT4	Open-drain fault indicators - pulled low during per-channel overtemperature; require external pull-up.
6	GND	Ground reference for internal circuitry and protection comparators; loss-of-GND detection enabled.
13–15, 16–18, 19–21, 22–24	OUT4–OUT1	High-side power outputs - each drives one side of load (load other side grounded); internally protected against overload and avalanche.
11, 12	NC	No-connect terminals - must remain unconnected per datasheet; no internal connection or function.

Key Features

Feature	Design Value
Per-channel thermal fault reporting	Four independent open-drain STATx pins provide real-time, channel-specific overtemperature status without shared bus contention.
Non-simultaneous channel restart	Prevents supply current surges during multi-channel thermal recovery by staggering restart timing across overloaded channels.
Loss-of-GND protection	Detects GND disconnection (e.g., broken ground trace) and limits output current to 0.5 mA - avoids unsafe floating-load conditions.
Integrated V_CC clamp	Clamps supply transients to ≤52 V (I_S = 20 mA), eliminating need for external TVS diodes in 24 V industrial systems.
Fast demagnetization	Generates V_OUT = V_CC − 45 V during turn-off - accelerates decay of inductive energy and reduces arcing in relay/solenoid drivers.

Applications

Programmable Logic Controller I/O

Industrial PC Peripheral Control

Use Scenario: Driving 24 V DC solenoid valves and indicator lamps in modular PLC backplanes with hot-swap capability.

IC Role / Device Role / Timing Role: High-side switch with per-channel diagnostics replaces electromechanical relays and discrete MOSFET+driver solutions.

Use Value: Eliminates mechanical wear, enables predictive maintenance via STATx monitoring, and sustains >100 k cycle life under DC-13 load switching.

Use Scenario: Controlling stepper motor enable lines, fan speed signals, and sensor excitation in rugged IPC chassis.

IC Role / Device Role / Timing Role: Quad-channel high-side driver with fast turn-on (<35 µs) and controlled dV/dt for noise-sensitive analog subsystems.

Use Value: Reduces board space vs. four discrete drivers, suppresses EMI via controlled rise/fall times, and meets IEC61000-4-4 level 3 immunity.

Numerical Control Machine Axis Control

Factory Automation Safety Interlock

Use Scenario: Enabling brake coils and hydraulic pressure solenoids in CNC machine tool axes with strict functional safety timing constraints.

IC Role / Device Role / Timing Role: Safety-relevant power switch with deterministic thermal shutdown (TTSD = 150–190 °C) and diagnostic feedback.

Use Value: Supports SIL2-capable architectures via STATx fault signaling and predictable current limiting (ILIM = 1.1–2.6 A) during short circuits.

Use Scenario: Implementing dual-channel monitored safety gates in robotic workcells where redundant actuation paths are required.

IC Role / Device Role / Timing Role: Dual high-side driver with loss-of-GND detection and undervoltage lockout (V_USD = 7–10.5 V, hysteresis = 0.4–0.5 V).

Use Value: Prevents unintended actuation during ground faults or brownouts, satisfying PL e / Category 4 requirements per ISO 13849-1.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side smart power switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
VNI4140K	0.6 A per channel, lower I_PEAK (1.3 A), higher R_DS(on) (0.08–0.14 Ω), same package and pinout.	Targeted at lighter loads (e.g., LED banks, small relays) where 1.0 A headroom is unnecessary.	Select when thermal budget is tighter and peak load current remains ≤0.6 A; shares footprint and firmware interface.
IPS2050H	Single-channel, 0.5 A, integrated current sense output (analog), no STAT pin, smaller SO-8 package.	Used in space-constrained designs requiring per-channel current measurement instead of thermal fault flagging.	Choose for analog feedback loop integration or when only one channel is needed; not pin-compatible or functionally equivalent.

Compared with VNI4140K-32, VNI4140K offers reduced current capacity but identical diagnostics and protection architecture, while IPS2050H trades channel count and digital fault signaling for analog sensing in compact form - neither is a drop-in replacement, but both address adjacent design trade-offs in industrial power switching.

Availability

VNI4140K-32 is available at Aetrix Electronics and suitable for programmable logic controller I/O, industrial PC peripheral control, and numerical control machine axis control requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial automation deployments.

Supply support for VNI4140K-32 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 specializing in power management, automotive ICs, and industrial-grade smart power devices with broad manufacturing scale and AEC-Q100/IEC61508-aligned quality systems.

The VNI4140K-32 belongs to ST's VIPower™ high-side driver family, engineered specifically for robust, diagnostic-rich switching of industrial DC loads under harsh electromagnetic and thermal conditions.

FAQ

What is the maximum continuous output current per channel for VNI4140K-32?

The VNI4140K-32 delivers 1.0 A continuous DC output current per channel under recommended operating conditions (V_CC = 10.5–36 V, T_J ≤ 125 °C), verified per Table 8 (ILIM) and Section 5.4 of DS13837 Rev 4. This rating assumes adequate PCB copper area for thermal dissipation (R_th(JC) = 2 °C/W per channel).

How does the non-simultaneous channel restart feature improve system reliability?

When multiple channels enter thermal shutdown, VNI4140K-32 staggers their restart timing to avoid coincident inrush currents that could collapse the 24 V supply rail or trigger upstream OCP. This behavior is implemented in hardware and ensures stable re-engagement of actuators in multi-axis motion control systems without manual intervention.

Can VNI4140K-32 drive inductive loads exceeding 1 mH, and what protection applies during turn-off?

Yes - the device is explicitly designed for inductive loads per EN 60947-5-1 DC-13 and supports fast demagnetization with V_OUT(OFF) reaching V_CC − 45 V (typical), dissipating stored energy safely. Avalanche energy rating (E_AS) is 5 J per channel at T_AMB = 125 °C, validated for single-pulse conditions.

Is external reverse polarity protection required, and if so, what implementation is recommended?

Reverse polarity protection is not integrated; ST recommends either a series resistor (R_GND ≥ V_CC/|I_GND| = 24 V/250 mA = 96 Ω) or Schottky diode between IC GND and system GND. The resistor method avoids forward voltage drop but requires power rating calculation (P_D = V_CC²/R_GND); diode selection must meet V_RRM > |V_CC| and handle I_S×V_F dissipation.

VNI4140K-32 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 24-PowerBSOP (0.295", 7.50mm Width)

Series:: VIPower™

Packaging:: Tube

Product Status:: Active

Switch Type:: General Purpose

Number of Outputs:: 4

Ratio - Input:Output:: 1:1

Output Configuration:: High Side

Output Type:: N-Channel

Interface:: On/Off

Voltage - Load:: 10.5V ~ 36V

Voltage - Supply (Vcc/Vdd):: Not Required

Current - Output (Max):: 1A

Rds On (Typ):: 80mOhm (Max)

Input Type:: Non-Inverting

Features:: Status Flag

Fault Protection:: Current Limiting (Fixed), Over Temperature

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSSO-24

VNI4140K-32 FAQ

1.How can I place an order for VNI4140K-32 through Aetrix?

Please submit a Request for Quotation (RFQ) for VNI4140K-32 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 VNI4140K-32 reliable?

The price and inventory of VNI4140K-32 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VNI4140K-32 is usually 5 days.

3.What payment methods are accepted for VNI4140K-32?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VNI4140K-32 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VNI4140K-32?

VNI4140K-32 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VNI4140K-32 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 VNI4140K-32?

For technical support, including VNI4140K-32 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VNI4140K-32 requirements.

6.How does Aetrix verify that VNI4140K-32 is sourced from the original manufacturer or authorized distributors?

All VNI4140K-32 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 VNI4140K-32 meets industry standards.

7.What is the process for return or replacement of VNI4140K-32?

All VNI4140K-32 units undergo pre-shipment inspection (PSI). If there is an issue with VNI4140K-32, 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 VNI4140K-32 part is unused and in its original packaging.

Return procedure for VNI4140K-32:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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