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

STMicroelectronics VNF9Q20FTR

Name: VNF9Q20FTR
Brand: STMicroelectronics
SKU: VNF9Q20FTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VNF9Q20FTR

Manufacturer:: STMicroelectronics

Category:: Power Distribution Switches, Load Drivers

Package:: -

Datasheet:: VNF9Q20FTR.pdf

Description:: 4 CHANNEL HIGH-SIDE DRIVER WITH

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Product details

Overview

VNF9Q20FTR from STMicroelectronics is a quad-channel automotive high-side driver IC built on VIPower M0-7 technology, designed for direct ground-referenced resistive/inductive load control in 12 V/24 V battery systems. It delivers 34.5 A typical current limit per channel, 21.5 mΩ typical R_ON, and operates up to 28 V V_CC, with integrated STi²Fuse wire-harness protection, 10-bit digital current sensing, and fail-safe limp-home operation via assignable DI0/DI1 inputs.

For engineers reviewing the VNF9Q20FTR datasheet, VNF9Q20FTR pinout, VNF9Q20FTR application, or VNF9Q20FTR equivalent, this device supports SPI-controlled power distribution with real-time diagnostics (open-load, short-to-V_CC/GND, overtemperature), programmable PWM engine, capacitive charging mode, and AEC-Q100 Grade 0 qualification for under-hood automotive use.

Technical Context

The VNF9Q20FTR implements four independent high-side power switches with integrated gate drivers, thermal shutdown (configurable latch-off or auto-restart), and STi²Fuse I²t-based harness protection-each channel individually programmable for INOM (3-bit) and tNOM (3-bit). Its diagnostic architecture combines synchronous (SPI-readable status registers) and asynchronous (direct pin-level fault signaling) reporting paths.

Control is dual-mode: full-feature SPI interface (CSN/SCK/SDI/SDO, 3.3 V/5 V VDD-compatible) with 24-bit ST-SPI protocol, plus direct input pins (DI0/DI1) configurable via OTP for limp-home operation. The internal 4.7 V VREG regulator powers digital logic, while the backside TAB serves as both thermal pad and V_CC connection point for MOSFET drains.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Max	28 V - Supports 24 V automotive battery transients including load dump.
R_ON typ.	21.5 mΩ - Enables low conduction loss and <1.5 W dissipation at 30 A per channel.
I_LIMH typ.	34.5 A - Programmable current limit protects against sustained overload without external fusing.
Channel Count	4 - Independent high-side outputs (OUTPUT0–OUTPUT3) with per-channel STi²Fuse configuration.
Diagnostic Resolution	10-bit ADC - Provides digital proportional current sense feedback with trimming bits for reference calibration.
AEC-Q100 Grade	Grade 0 (−40 °C to +150 °C) - Qualified for engine compartment deployment with case temperature monitoring up to 140 °C warning thresholds.
Standby Current	<10 µA - Achieved in Sleep mode with VREG < VREG_POR_L, enabling ultra-low-power battery-off states.

Pinout & Package

Package: QFN 6 × 6 mm, 32-pin, exposed thermal TAB (electrically connected to V_CC/drain); RoHS-compliant, tape-and-reel packaging (VNF9Q20FTR).

Pin/Terminal	Circuit Role	Design Meaning
TAB	V_CC / Drain Connection	Backside thermal pad tied directly to MOSFET drains; must be soldered but electrically isolated on PCB.
OUTPUT0–OUTPUT3	Power Output Terminals	Four source-connected high-side outputs (pins 27–30, 3–4, 21–22); each drives loads to GND.
DI0, DI1	Direct Input Control	OTP-configurable pins for limp-home output control or diagnostic functions (e.g., I²t unlatch).
CSN, SCK, SDI, SDO	SPI Interface	4-wire ST-SPI bus (24-bit frame) for register read/write, diagnostics, and configuration; CMOS-compatible.
VREG	Internal Regulator Output	4.7 V ±5 % regulated supply for digital core; requires 2 µF capacitor + 120 Ω resistor to GND.
VDD	SPI I/O Supply	3.3 V or 5 V tolerant; enables redundant supply path via optional diode to VREG.
STDBY_NOT	Standby Enable	Active-low input controlling entry/exit from Standby mode; debounced internally.

Key Features

Feature	Design Value
STi²Fuse Protection	Per-channel I²t curve programmable via 3-bit INOM/tNOM settings-protects traces/connectors without limiting inrush.
Capacitive Charging Mode (CCM)	Enables controlled high-current charge of large capacitive loads (e.g., LED arrays) with harness protection disabled.
Limp-Home Fail-Safe	Automatic transition to DI0/DI1-controlled outputs on SPI watchdog timeout, EN=0, or SW reset-no MCU dependency.
Digital Current Sense	Integrated 10-bit ADC with trimming bits provides calibrated mA-level load current feedback over SPI.
EMC Optimized Design	Low EMI emissions and high immunity achieved via slew-rate controlled outputs and optimized layout in QFN package.

Applications

Body Control Module (BCM)

Front Lighting System

Use Scenario: Controlling door locks, window lifts, and interior lighting in centralized vehicle body electronics.

IC Role / Device Role / Timing Role: High-side power switch with diagnostics for 12 V solenoids and incandescent lamps.

Use Value: Eliminates discrete fuses and relays; STi²Fuse prevents wiring damage during intermittent shorts; open-load detection confirms actuator integrity.

Use Scenario: Driving halogen, HID, and matrix LED headlamp modules with dynamic dimming and fault reporting.

IC Role / Device Role / Timing Role: Quad-channel high-side driver supporting PWM-controlled brightness and CCM for LED array pre-charge.

Use Value: 34.5 A current capability handles cold filament inrush; 10-bit current sense enables closed-loop thermal derating.

Engine Bay Power Distribution

Commercial Vehicle Trailer Control

Use Scenario: Managing radiator fans, fuel pumps, and HVAC blowers in high-temperature under-hood environments.

IC Role / Device Role / Timing Role: AEC-Q100 Grade 0 high-side driver with case temperature monitoring up to 140 °C.

Use Value: TW1–TW3 thermal warnings (120/130/140 °C) enable progressive derating before thermal shutdown; latch-off prevents uncontrolled restart.

Use Scenario: Controlling trailer brake lights, turn signals, and ABS solenoids across long cable runs in heavy-duty trucks.

IC Role / Device Role / Timing Role: Harness-protected high-side switch mitigating voltage drop and overheating in 10+ meter wiring harnesses.

Use Value: STi²Fuse adapts I²t threshold per channel to match individual load impedance-prevents fuse nuisance blowing during cranking.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel high-side driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS4H160-Q1	4-channel, 60 V max, 12 mΩ R_ON, no integrated ADC or STi²Fuse; uses analog current sense.	Lacks digital current feedback and programmable I²t protection; requires external fault processing.	Choose when lower R_ON and higher voltage margin outweigh diagnostic depth and harness protection.
BTS724G	Quad high-side, 40 V max, 10 mΩ R_ON, 8-bit current sense, no CCM or parallel mode.	Supports basic diagnostics but no capacitive charging mode or per-channel I²t tuning.	Prefer for cost-sensitive BCMs where CCM and advanced limp-home are not required.

Compared with TPS4H160-Q1 and BTS724G, the VNF9Q20FTR uniquely integrates 10-bit digital current sensing, per-channel STi²Fuse programming, and capacitive charging mode-enabling robust, self-diagnosing power distribution without external components for automotive lighting and body control.

Availability

VNF9Q20FTR is available at Aetrix Electronics and suitable for automotive body control modules, front lighting systems, engine bay power distribution, and commercial vehicle trailer control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for VNF9Q20FTR 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 validation expertise.

The VNF9Q20FTR belongs to ST's VIPower high-side driver product line, engineered specifically for intelligent, protected power distribution in automotive E/E architectures-emphasizing diagnostics, fail-safe operation, and harness-level reliability.

FAQ

What is the function of the TAB pin on the VNF9Q20FTR?

The TAB is the exposed thermal pad on the underside of the QFN package and is electrically connected to the V_CC rail and MOSFET drains. It must be soldered to a PCB copper pour for thermal dissipation but kept electrically isolated from other nets. It serves no signal function beyond power and thermal conduction.

How does the STi²Fuse protection differ from conventional current limiting?

STi²Fuse implements a programmable I²t-based trip curve per channel-defined by INOM (nominal current) and tNOM (nominal time)-to protect wiring harnesses without reacting to benign inrush currents. Unlike fixed current-limiting, it tolerates short-duration surges while interrupting sustained overloads that risk thermal damage to connectors or traces.

Can the VNF9Q20FTR operate without an MCU connected via SPI?

Yes. In fail-safe (limp-home) mode, outputs are controlled directly by DI0/DI1 pins-configured via OTP-allowing basic ON/OFF functionality even during SPI communication loss, MCU reset, or watchdog timeout. This ensures critical loads remain operable under fault conditions.

What is the purpose of Capacitive Charging Mode (CCM)?

CCM enables high-current, controlled charging of large capacitive loads (e.g., LED arrays) by temporarily disabling STi²Fuse and LED mode logic. It activates via SPI command or DIx edge detection and automatically exits after tCCM_DIS, preventing false overcurrent trips during initial capacitor energization.

VNF9Q20FTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: -

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Switch Type:: -

Number of Outputs:: -

Ratio - Input:Output:: -

Output Configuration:: -

Output Type:: -

Interface:: -

Voltage - Load:: -

Voltage - Supply (Vcc/Vdd):: -

Current - Output (Max):: -

Rds On (Typ):: -

Input Type:: -

Features:: -

Fault Protection:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

VNF9Q20FTR FAQ

1.How can I place an order for VNF9Q20FTR through Aetrix?

Please submit a Request for Quotation (RFQ) for VNF9Q20FTR 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 VNF9Q20FTR reliable?

The price and inventory of VNF9Q20FTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VNF9Q20FTR is usually 5 days.

3.What payment methods are accepted for VNF9Q20FTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VNF9Q20FTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VNF9Q20FTR?

VNF9Q20FTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VNF9Q20FTR 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 VNF9Q20FTR?

For technical support, including VNF9Q20FTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VNF9Q20FTR requirements.

6.How does Aetrix verify that VNF9Q20FTR is sourced from the original manufacturer or authorized distributors?

All VNF9Q20FTR 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 VNF9Q20FTR meets industry standards.

7.What is the process for return or replacement of VNF9Q20FTR?

All VNF9Q20FTR units undergo pre-shipment inspection (PSI). If there is an issue with VNF9Q20FTR, 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 VNF9Q20FTR part is unused and in its original packaging.

Return procedure for VNF9Q20FTR:

1.Submit a request within 90 days.

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

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