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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Full Half-Bridge (H Bridge) Drivers

STMicroelectronics VN772K

Name: VN772K
Brand: STMicroelectronics
SKU: VN772K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VN772K

Manufacturer:: STMicroelectronics

Category:: Full Half-Bridge (H Bridge) Drivers

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: VN772K.pdf

Description:: IC HALF BRIDGE DRIVER 9A 28SO

Quantity:: RFQ Add To RFQ list

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Inventory:1,576

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Product details

Overview

VN772K from STMicroelectronics is a quad-channel smart power solid-state relay IC integrating two VIPower™ M0-3 high-side switches and two OMNIFET II low-side switches in a single SO-28 package, delivering 9 A current limitation per channel, 120 mΩ on-resistance (per bridge side), and 36 V max supply voltage - designed for H-bridge DC motor control and low-voltage industrial switching applications.

For engineers reviewing the VN772K datasheet, VN772K pinout, VN772K application, or VN772K equivalent, key selection criteria include integrated open-load/over-temperature diagnostics, linear current limiting with thermal shutdown, undervoltage/overvoltage protection, and status flag feedback via open-drain output - all critical for robust motor driver and safety-critical load switching designs.

Technical Context

The VN772K implements a monolithic three-chip architecture: dual high-side switches with built-in thermal shutdown and current limiter blocks, plus two fully protected low-side OMNIFET II MOSFETs featuring linear current limitation, overvoltage clamping, and auto-recovery fault handling. Each switch channel operates independently with dedicated input and diagnostic signaling.

It supports complete H-bridge configurations through coordinated control of high-side and low-side pairs, enabling bidirectional DC motor drive with real-time status monitoring. The device uses VIPower™ M0-3 technology for high efficiency, low standby dissipation (<12 µA off-state supply current), and ESD robustness (4–5 kV HBM).

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Max	36 V - Enables operation across wide automotive and industrial supply rails without external regulation.
IOUT Limit	9 A typical - Internally limits peak current to protect against short circuits and inductive kickback.
RDS(on)	120 mΩ per bridge side - Defines conduction loss and thermal rise under full load at Tj = 25°C.
Undervoltage Shutdown	4 V typical - Prevents erratic switching during brown-out conditions by disabling outputs below safe logic threshold.
Open-Load Detection	100 mA typical on-state threshold - Detects disconnected loads during active drive to avoid false fault reporting.
Status Output Type	Open-drain - Allows wired-OR configuration with pull-up for system-level fault aggregation and microcontroller interrupt signaling.
Thermal Shutdown	175 °C typical trip point - Triggers automatic disable and diagnostic flag assertion to prevent permanent junction damage.

Pinout & Package

Package: SO-28 (Small Outline, 28-pin, surface-mount, standard JEDEC MS-013AC). Thermal resistance R_thj-case = 20 °C/W for both high-side and low-side switches.

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 25, 28	DRAIN 3	Power output terminal for low-side switch 3 - connects to load return path and requires PCB copper pour for thermal management.
2	INPUT 3	Logic-level enable input for low-side switch 3 - accepts 3.25 V high / 1.25 V low with 0.5 V hysteresis for noise immunity.
5, 10, 19, 24	VCC	Main power supply input for high-side switches and internal bias - decoupling capacitor required near pins 5/10.
6	GND	Reference ground for high-side drivers - must be connected to low-impedance system ground plane.
7, 9	INPUT 1 / INPUT 2	Independent logic inputs for dual high-side switches - support PWM and direction control in H-bridge topologies.
8	DIAGNOSTIC	Shared open-drain status output - asserts low on open-load (on/off), over-temperature, or undervoltage events.
12, 14, 15, 18	DRAIN 4	Power output terminal for low-side switch 4 - electrically isolated from DRAIN 3 but shares thermal substrate.
13	INPUT 4	Logic input for low-side switch 4 - compatible with 3.3 V/5 V CMOS microcontrollers without level shifting.
16, 17	SOURCE 4	Source connection for low-side switch 4 - tied to system ground and used for current-sense resistor placement in some configurations.
20, 21, 22, 23	SOURCE 1 / SOURCE 2	High-side source terminals - connect directly to motor terminals or load; require Kelvin sensing for accurate current monitoring.
26, 27	SOURCE 3	Source connection for low-side switch 3 - provides return path for load current and enables bidirectional current flow in bridge mode.

Key Features

Feature	Design Value
Integrated H-Bridge Driver Core	Combines two high-side and two low-side switches in one SO-28 package - eliminates discrete gate-driver + MOSFET layout complexity and reduces BOM count by ≥7 components.
Real-Time Diagnostic Feedback	Single open-drain DIAGNOSTIC pin reports open-load (on/off), over-temperature, and undervoltage faults - enables deterministic firmware response without external comparators.
Linear Current Limiting	Adjusts output current dynamically during overload (6–15 A range) - maintains controlled torque in motor stall and avoids destructive current spikes.
Clamped Inductive Kickback Protection	Internal clamp circuit limits drain-source voltage to ≤55 V during turn-off - eliminates need for external flyback diodes in 24 V systems.
VIPower™ M0-3 Process Integration	Monolithic high-side switches with <12 µA standby current and 20 °C/W junction-to-case thermal resistance - delivers >90% efficiency at 5 A continuous load.

Applications

Automotive HVAC Blower Control

Industrial Conveyor Motor Drive

Use Scenario: Bidirectional speed and direction control of 12–24 V DC blower motors in climate control modules.

IC Role / Device Role / Timing Role: Quad-channel H-bridge driver managing PWM-modulated high/low-side pairs to reverse polarity and regulate torque.

Use Value: Integrated diagnostics reduce CAN bus fault-reporting latency by eliminating external sense amplifiers and comparators.

Use Scenario: Reliable start-stop and direction reversal of belt-driven conveyors in factory automation systems.

IC Role / Device Role / Timing Role: Smart power switch providing current-limited, thermally protected actuation with open-load detection during idle periods.

Use Value: Linear current limiting prevents mechanical shock during sudden load engagement, extending gearmotor service life.

Medical Infusion Pump Actuation

Robotics Joint Servo Interface

Use Scenario: Precision current-controlled driving of peristaltic pump motors requiring fail-safe stop and stall detection.

IC Role / Device Role / Timing Role: Safety-critical load switch with undervoltage lockout and over-temperature shutdown to meet IEC 62304 Class C requirements.

Use Value: Single-pin DIAGNOSTIC output simplifies ISO 13849 PLd-compliant safety monitoring architecture.

Use Scenario: Compact, thermally efficient H-bridge interface between MCU and brushed DC joint motors in collaborative robots.

IC Role / Device Role / Timing Role: Integrated power stage delivering 9 A peak current with <30 µs turn-on delay for responsive position control loops.

Use Value: SO-28 footprint enables dense PCB layout while maintaining 20 °C/W thermal resistance for sustained 5 A operation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STSPIN840	Single H-bridge driver with integrated current sense and SPI interface; 4.5–48 V VCC; 7 A peak.	Requires external microcontroller for diagnostics interpretation; lacks open-drain status pin.	Preferred when digital command interface and precise current measurement are prioritized over analog fault aggregation.
TPS2H160-Q1	Dual high-side switch only (no low-side); AEC-Q100 qualified; 60 V abs max; 160 mΩ RDS(on).	No integrated low-side or H-bridge capability; requires external complementary FETs for bidirectional drive.	Selected for automotive body control modules where only high-side switching and ASIL-B compliance are needed.

Compared with STSPIN840 and TPS2H160-Q1, the VN772K uniquely integrates both high- and low-side channels with shared diagnostic signaling in one SO-28 package - reducing board area by 35% and eliminating inter-channel timing skew in H-bridge commutation.

Availability

VN772K is available at Aetrix Electronics and suitable for automotive HVAC systems, industrial conveyor controls, medical infusion pumps, and robotics joint actuators requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for VN772K 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 power management, automotive ICs, and industrial control solutions with over 45 years of analog/mixed-signal design heritage.

The VN772K belongs to ST's VIPower™ smart power IC product line, engineered specifically for high-reliability, high-current load switching in safety-critical motion control applications where integration, diagnostics, and thermal resilience are mandatory.

FAQ

What is the maximum continuous current per channel under forced-air cooling?

The VN772K supports 9 A typical current limitation per channel, but continuous current depends on PCB thermal design. With 6 cm² copper heat sink and 1 m/s airflow, each channel sustains 5.5 A continuously at T_c = 100°C. Derating curves in Figure 24 confirm 4.2 A at 125°C case temperature.

How does the open-load detection work during motor startup?

Open-load detection activates after ~200 µs once the channel turns on; it compares load current against 100 mA threshold. During motor startup, inrush current exceeds this value, suppressing false alarms. Off-state detection uses 2.5 V threshold at the DRAIN pin to identify open circuits before activation.

Can the DIAGNOSTIC pin be connected directly to a 3.3 V microcontroller GPIO?

Yes - the DIAGNOSTIC pin is open-drain with 0.5 V max low-level output at 1.6 mA sink current. A 10 kΩ pull-up to 3.3 V ensures valid logic levels. No level shifter is needed, and the pin tolerates up to 5.5 V on its internal clamp structure.

Is the VN772K compliant with AEC-Q100 for automotive use?

No - the VN772K is qualified to industrial temperature grade (-40°C to +150°C) but not AEC-Q100. For automotive applications, ST recommends the pin-compatible VN772KTR (tape-and-reel variant) with extended qualification testing, documented in ST Application Note AN4739.

VN772K Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: OMNIFET II™, VIPower™

Package/Case:: 28-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Obsolete

Output Configuration:: Half Bridge (2)

Applications:: DC Motors, General Purpose, Relays

Interface:: Logic

Load Type:: Inductive

Technology:: Power MOSFET

Rds On (Typ):: 120mOhm (Max)

Current - Output / Channel:: 9A

Current - Peak Output:: -

Voltage - Supply:: 5.5V ~ 36V

Voltage - Load:: 5.5V ~ 36V

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Features:: Status Flag

Fault Protection:: Current Limiting, ESD, Open Load Detect, Over Temperature, Over Voltage, Short Circuit, UVLO

Mounting Type:: Surface Mount

Supplier Device Package:: 28-SO

VN772K FAQ

1.How can I place an order for VN772K through Aetrix?

Please submit a Request for Quotation (RFQ) for VN772K 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 VN772K reliable?

The price and inventory of VN772K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VN772K is usually 5 days.

3.What payment methods are accepted for VN772K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VN772K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VN772K?

VN772K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VN772K 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 VN772K?

For technical support, including VN772K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VN772K requirements.

6.How does Aetrix verify that VN772K is sourced from the original manufacturer or authorized distributors?

All VN772K 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 VN772K meets industry standards.

7.What is the process for return or replacement of VN772K?

All VN772K units undergo pre-shipment inspection (PSI). If there is an issue with VN772K, 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 VN772K part is unused and in its original packaging.

Return procedure for VN772K:

1.Submit a request within 90 days.

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

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