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

STMicroelectronics VN771KTR-E

Name: VN771KTR-E
Brand: STMicroelectronics
SKU: VN771KTR-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VN771KTR-E

Manufacturer:: STMicroelectronics

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

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

Datasheet:: VN771KTR-E.pdf

Description:: IC HALF BRIDGE DRIVER 9A 28SO

Quantity:: RFQ Add To RFQ list

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Inventory:1,417

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Product details

Overview

VN771KTR-E from STMicroelectronics is a quad-channel smart power solid-state relay in SO-28 package, integrating two VIPower™ M0-3 high-side switches (R_DS(on) = 60–120 mΩ) and two OMNIFET II low-side switches (R_DS(on) = 35–70 mΩ), rated for 36 V supply and 9 A continuous output per channel. It enables full H-bridge DC motor control with linear current limitation, open-load diagnostics, and integrated clamping.

For engineers reviewing the VN771KTR-E datasheet, VN771KTR-E pinout, VN771KTR-E application, or VN771KTR-E equivalent, key selection criteria include dual high-side/low-side topology, status flag feedback, thermal shutdown at 150–200 °C, and SO-28 package compatibility with industrial motor drive and automotive body control modules.

Technical Context

The device implements a monolithic triple-chip architecture: one die for dual high-side drivers with undervoltage/overvoltage shutdown (V_USD = 4 V typ., V_OV = 36 V), and two separate low-side OMNIFET II dies with avalanche-rated drain-source clamping (V_CLAMP = 40–55 V) and fast linear current limiting (t_DLIM = 45 µs).

Diagnostic functionality includes open-load detection in both ON (I_OL = 100 mA typ.) and OFF (V_OL = 2.5 V typ.) states, plus overtemperature reporting via open-drain DIAG pin with 20 µs fault delay (t_SDL) and 15 °C thermal hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	5.5–36 V: Supports 12 V automotive and 24 V industrial rails with internal undervoltage lockout at 4 V.
R_DS(on) High-Side	60–120 mΩ @ 2 A, 25 °C: Enables <1.2 W conduction loss per high-side channel at 9 A peak.
R_DS(on) Low-Side	35–70 mΩ @ 7 A, 25 °C: Delivers <0.5 W conduction loss per low-side switch under full load.
I_LIM Current Limit	6–15 A (temp-dependent): Linearly limits output to protect against short circuits without latch-off.
T_JSH Shutdown Temp	150–175 °C: Thermal protection triggers before silicon damage; reset occurs at 135 °C.
V_ESD HBM	4000 V on INPUT/STATUS pins: Meets IEC 61000-4-2 Level 3 for robust board-level ESD immunity.
t_D(on)/t_D(off)	30 µs / 30 µs (high-side), 80–250 ns / 450–1350 ns (low-side): Enables precise PWM timing in motor commutation.

Pinout & Package

SO-28 surface-mount package (18.1 × 10.65 mm, 1.27 mm pitch) with exposed thermal pad; optimized for PCB heat dissipation (R_thj-case ≤ 20 °C/W).

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 25, 28	DRAIN 3	Power output terminal of low-side switch 3; connects to load return path.
2	INPUT 3	Logic-level gate control input for low-side switch 3 (VIH = 3.25 V, VIL = 1.25 V).
5, 10, 19, 24	V_CC	Supply rail for high-side switches and internal logic; accepts up to 41 V absolute max.
6	GND	Reference ground for high-side drivers; isolated from low-side source terminals.
7, 9	INPUT 1 / INPUT 2	Independent TTL/CMOS-compatible inputs for high-side switches 1 and 2.
8	DIAGNOSTIC	Open-drain status output indicating open-load, overtemperature, or undervoltage faults.
12, 14, 15, 18	DRAIN 4	Power output terminal of low-side switch 4; used with DRAIN 3 for dual low-side configuration.
13	INPUT 4	Gate control input for low-side switch 4; supports 20 mA max input current.
16, 17, 20, 21, 22, 23, 26, 27	SOURCE x	Source terminals for all four switches; electrically separated to support independent H-bridge leg routing.

Key Features

Feature	Design Value
Integrated H-bridge driver topology	Two high-side + two low-side switches in single SO-28 package eliminate discrete layout complexity and timing skew.
Real-time open-load diagnostics	Detects disconnected loads in both ON (50–200 mA threshold) and OFF (1.5–3.5 V threshold) states without external circuitry.
Linear current limitation	Smoothly clamps output current during overload-no disruptive switching or latch-up-preserving system stability.
Thermal shutdown with hysteresis	Shuts down at 150–200 °C and resets at 135 °C, preventing thermal cycling and enabling safe auto-recovery.
On-chip overvoltage clamping	Clamps inductive kickback to V_CC − 41 V (high-side) and 40–55 V (low-side), eliminating need for external TVS diodes.

Applications

Automotive Body Control Module

Industrial DC Motor Driver

Use Scenario: Controlling window lift, seat adjust, or mirror actuators in 12 V vehicle systems.

IC Role / Device Role / Timing Role: Quad-channel power switch providing bidirectional H-bridge drive with diagnostic feedback to MCU.

Use Value: Reduces BOM count by replacing eight discrete MOSFETs + drivers + protection components while enabling fault-aware operation.

Use Scenario: Driving 24 V brushed DC motors in PLC-controlled conveyor or valve actuation systems.

IC Role / Device Role / Timing Role: Solid-state relay replacement delivering fast switching (30 µs high-side delays), current limiting, and thermal monitoring.

Use Value: Eliminates mechanical relay wear-out and contact arcing, supporting >10⁷ cycles with consistent timing and no bounce.

Smart HVAC Actuator

Medical Pump Motor Control

Use Scenario: Precision airflow damper positioning in commercial HVAC units using 24 V DC motors.

IC Role / Device Role / Timing Role: Dual H-bridge controller with open-load detection ensuring motor connection integrity before movement.

Use Value: Prevents failed actuation due to broken wiring or connector issues-diagnostic flag alerts host controller pre-operation.

Use Scenario: Low-noise, low-EMI peristaltic pump motor control in infusion devices requiring fail-safe operation.

IC Role / Device Role / Timing Role: Current-limited, thermally protected quad switch enabling microstepped or analog speed control.

Use Value: Guarantees safe current ramping and immediate shutdown on overtemperature-critical for patient safety compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STSPIN840	Single H-bridge driver (2 channels), SPI interface, lower R_DS(on) (25 mΩ), no open-load OFF detection.	Targeted at stepper motor control; lacks dual independent low-side outputs and analog open-load sensing.	Choose when SPI configurability and higher efficiency outweigh need for standalone open-load diagnostics.
TPS27082L	Quad high-side switch only (no low-side), 1.2 A per channel, no integrated clamping or thermal shutdown.	Designed for LED and solenoid driving-not suitable for H-bridge motor control or inductive load protection.	Use only for low-current, non-inductive loads where full bridge topology and fault protection are unnecessary.

Compared with VN771KTR-E, STSPIN840 offers digital control but omits critical analog diagnostics and dual low-side capability, while TPS27082L provides only high-side functionality with no motor-drive protection features-neither matches the integrated H-bridge + diagnostics + ruggedness of the VN771KTR-E.

Availability

VN771KTR-E is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, and medical actuator systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for VN771KTR-E 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, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

VN771KTR-E belongs to ST's VIPower™ smart-power family, engineered specifically for high-reliability, high-diagnostic-content power switching in automotive and industrial motion control applications.

FAQ

What is the maximum continuous output current per channel?

The VN771KTR-E supports 9 A continuous output current per channel under specified thermal conditions (T_c ≤ 25 °C). At elevated case temperatures, current capability derates linearly-e.g., ~6 A at T_c = 100 °C-based on the 20 °C/W junction-to-case thermal resistance and internal current-limit threshold of 6–15 A.

Does the device require external flyback diodes for inductive loads?

No. The VN771KTR-E integrates active clamp circuits on both high-side (V_demag = V_CC − 41 V) and low-side (V_CLAMP = 40–55 V) outputs, eliminating the need for external flyback diodes in typical H-bridge motor drive configurations.

How does open-load detection work in the OFF state?

In OFF state, the device applies a small test current through the channel and measures resulting voltage: if V_OL exceeds 1.5–3.5 V (typ. 2.5 V), an open-load condition is flagged on the DIAG pin. This detection operates independently for each high-side channel and requires no external components.

Can the high-side and low-side sections be used independently?

Yes. The VN771KTR-E allows independent control of its two high-side and two low-side switches. Their source terminals are physically separated (pins 20/21, 22/23, 16/17, 26/27), enabling use as four discrete switches, dual half-bridges, or a full H-bridge-configurable per application needs without shared reference constraints.

VN771KTR-E Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: OMNIFET II™, VIPower™

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

Packaging:: Tape & Reel (TR)

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):: 95mOhm (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

VN771KTR-E FAQ

1.How can I place an order for VN771KTR-E through Aetrix?

Please submit a Request for Quotation (RFQ) for VN771KTR-E 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 VN771KTR-E reliable?

The price and inventory of VN771KTR-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VN771KTR-E is usually 5 days.

3.What payment methods are accepted for VN771KTR-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VN771KTR-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VN771KTR-E?

VN771KTR-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VN771KTR-E 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 VN771KTR-E?

For technical support, including VN771KTR-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VN771KTR-E requirements.

6.How does Aetrix verify that VN771KTR-E is sourced from the original manufacturer or authorized distributors?

All VN771KTR-E 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 VN771KTR-E meets industry standards.

7.What is the process for return or replacement of VN771KTR-E?

All VN771KTR-E units undergo pre-shipment inspection (PSI). If there is an issue with VN771KTR-E, 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 VN771KTR-E part is unused and in its original packaging.

Return procedure for VN771KTR-E:

1.Submit a request within 90 days.

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

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