Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics VN771K-E

Name: VN771K-E
Brand: STMicroelectronics
SKU: VN771K-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: VN771K-E

Manufacturer:: STMicroelectronics

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

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

Datasheet:: VN771K-E.pdf

Description:: IC HALF BRIDGE DRIVER 9A 28SO

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,111

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

VN771K-E from STMicroelectronics is a quad-channel smart power solid-state relay in SO-28 package, integrating two VIPower™ M0-3 high-side switches and two OMNIFET II low-side switches for complete H-bridge motor control. It delivers 9 A typical current limit per channel, 95 mΩ R_DS(on) (high-side), 35 mΩ R_DS(on) (low-side), and operates up to 36 V supply voltage. It is used in automotive DC motor drivers requiring linear current limitation, open-load diagnostics, and integrated clamping.

For engineers reviewing the VN771K-E datasheet, VN771K-E pinout, VN771K-E application, or VN771K-E equivalent, key selection criteria include thermal shutdown behavior (T_jsh = 150–175 °C), status flag timing (t_SDL = 20 µs), dual-channel diagnostic capability, and SO-28 package compatibility with PCB layout constraints for high-current bridge topologies.

Technical Context

The device implements a hybrid architecture: dual high-side switches use VIPower™ M0-3 technology with built-in thermal shutdown, linear current limiting, undervoltage/overvoltage protection, and open-load detection in both ON/OFF states; low-side switches are fully autoprotected OMNIFET II MOSFETs with overvoltage clamping, 12–24 A current limit, and fault sink current (I_gf = 10–20 mA) for thermal intervention feedback.

Diagnostic functionality is centralized on the open-drain DIAG pin, reporting combined status of both high-side channels-including overtemperature, open load, and supply faults-while low-side fault indication relies on input pin voltage monitoring. The block diagram confirms independent gate control per switch with no shared logic between high- and low-side sections.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	5.5–36 V operating supply; enables direct connection to 12 V automotive battery with 41 V absolute max rating.
R_DS(on) (HS)	60–120 mΩ typical at I_OUT = 2 A, T_j = 25 °C; ensures <1.2 W conduction loss per high-side channel at 9 A.
R_DS(on) (LS)	35–70 mΩ typical at I_D = 7 A, T_j = 25 °C; supports efficient low-side switching with <0.5 W loss at rated current.
I_LIM (HS)	6–15 A programmable linear current limit; provides soft-fault response without abrupt shutdown during overload.
t_SDL	20 µs status delay under overload; enables fast system-level fault response before thermal damage occurs.
T_jsh	150–175 °C thermal shutdown threshold; protects silicon integrity while allowing transient peak operation near 150 °C.
V_CLAMP (LS)	40–55 V drain-source clamp voltage; suppresses inductive kickback from 6 mH loads without external TVS diodes.

Pinout & Package

Package: SO-28 (standard small-outline, 300 mil width), with exposed thermal pad (not electrically connected), 1.27 mm pitch, and maximum junction-to-case thermal resistance of 20 °C/W per switch section.

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 25, 28	DRAIN 3	Power output terminal for low-side switch 3; connects to motor winding or load return path.
2	INPUT 3	Logic-level gate control input for low-side switch 3; accepts 0–5 V TTL-compatible signals.
5, 10, 19, 24	V_CC	Shared power supply input for high-side switches and internal bias; must be decoupled near pins 5/10/19/24.
6	GND	Reference ground for high-side driver circuitry; separate from low-side source connections to avoid coupling noise.
7, 9	INPUT 1 / INPUT 2	Independent gate inputs for high-side switches 1 and 2; require pull-down resistors for safe default-OFF state.
8	DIAGNOSTIC	Open-drain status output indicating combined fault condition (overtemp, open load, UV/OV) for both high-side channels.
12, 14, 15, 18	DRAIN 4	Power output terminal for low-side switch 4; forms second half of H-bridge leg with DRAIN 3.
13	INPUT 4	Gate control input for low-side switch 4; electrically isolated from high-side inputs to prevent shoot-through risk.
16, 17, 26, 27	SOURCE 4 / SOURCE 3	Low-side source terminals; connect directly to system ground plane for minimal R_DS(on) impact and thermal dissipation.
20, 21, 22, 23	SOURCE 2 / SOURCE 1	High-side source terminals; serve as switched outputs referenced to V_CC, not ground-critical for H-bridge topology.

Key Features

Feature	Design Value
Integrated linear current limitation	Prevents destructive current surges during stall or short-circuit events without interrupting operation-enables graceful degradation instead of hard shutdown.
Open-load diagnostics (ON/OFF state)	Detects broken wires or disconnected motors by monitoring current thresholds (I_OL = 50–200 mA) and voltage levels (V_OL = 1.5–3.5 V) on both active and inactive channels.
Thermal shutdown with hysteresis	Triggers at 150–200 °C and resets at 135 °C (15 °C hysteresis), preventing oscillation during sustained thermal stress near limit.
On-chip overvoltage clamping	Clamps inductive flyback to ≤55 V (low-side) and V_CC−41 V (high-side), eliminating need for external snubbers in 12 V/24 V motor drives.
ESD robustness	4 kV HBM on all pins (5 kV on V_CC), ensuring reliability during handling and board assembly in industrial environments.

Applications

Automotive Power Window Control

Industrial Conveyor Motor Driver

Use Scenario: Bidirectional DC motor actuation for window lift/lower with stall detection and EMI-safe switching.

IC Role / Device Role / Timing Role: Quad-channel H-bridge controller managing forward/reverse polarity via coordinated high/low-side switching with <30 µs turn-on delay.

Use Value: Integrated open-load detection prevents false triggers from broken wiring; linear current limit avoids fuse blowing during mechanical jam.

Use Scenario: Low-voltage (12–24 V) conveyor belt motor drive requiring continuous duty cycle and thermal resilience.

IC Role / Device Role / Timing Role: Solid-state relay replacement delivering 9 A continuous per channel with 20 µs fault response latency.

Use Value: On-die thermal shutdown (150 °C) and 60 °C/W junction-to-ambient resistance enable reliable operation without forced air cooling.

Medical Infusion Pump Actuator

Robotics Joint Positioning Module

Use Scenario: Precision micro-stepped DC motor control for syringe advancement with safety-critical fault reporting.

IC Role / Device Role / Timing Role: Diagnostic-enabled bridge driver providing real-time status via open-drain DIAG pin synchronized to PWM control.

Use Value: Undervoltage lockout (V_USD = 3–5.5 V) prevents erratic motion during brownout; ESD-hardened inputs withstand clinical environment handling.

Use Scenario: Compact joint actuator using brushed DC motor with dynamic load reversal and torque monitoring.

IC Role / Device Role / Timing Role: Dual H-bridge building block enabling independent control of two motor axes in space-constrained robotic end-effectors.

Use Value: SO-28 footprint allows dense PCB layout; integrated clamping eliminates discrete TVS parts, reducing BOM count and failure points.

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 with integrated current sense and SPI interface; lower R_DS(on) (25 mΩ), but only two channels and no open-drain DIAG output.	Requires external MCU for diagnostics; suited for closed-loop torque control, not standalone fault reporting.	Select when precise current measurement and digital command interface outweigh need for autonomous status signaling.
TPS27082L	Single high-side switch with 12 V max V_CC, 85 mΩ R_DS(on), and no low-side integration; lacks open-load detection and thermal hysteresis.	Only suitable for unidirectional loads; requires four discrete units plus external logic to replicate VN771K-E's bridge function.	Choose only for 12 V-only systems where SO-28 integration and diagnostic consolidation are non-critical.

Compared with STSPIN840 and TPS27082L, the VN771K-E uniquely combines quad-channel H-bridge topology, autonomous open-drain diagnostics, and full thermal/overvoltage protection in one SO-28 package-reducing component count by ≥60% versus discrete solutions while enabling fail-safe motor control without host processor intervention.

Availability

VN771K-E is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and medical device actuation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for VN771K-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, specializing in automotive-grade power ICs, microcontrollers, and analog devices with ISO/TS 16949-certified manufacturing.

The VN771K-E belongs to ST's VIPower™ smart power family, designed specifically for robust, self-protected switching in harsh automotive and industrial environments where reliability, diagnostics, and thermal resilience are mandatory.

FAQ

What is the maximum continuous output current per channel?

The VN771K-E supports 9 A typical continuous output current per channel under specified thermal conditions (T_c = 25 °C, R_thj-amb ≤ 60 °C/W). Actual current capability depends on PCB copper area, ambient temperature, and airflow; derating curves show 15 A peak current at T_j = 125 °C with proper heatsinking.

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

In OFF state, open-load detection monitors the voltage at the DRAIN pin: if V_OL exceeds 1.5–3.5 V (measured against GND), the DIAG pin asserts low after 1000 µs delay (T_DOL(off)). This confirms absence of load connection without requiring external test current sources.

Can VN771K-E drive inductive loads without external clamping diodes?

Yes-the device integrates bidirectional overvoltage clamping circuits on both high- and low-side switches. For low-side switches, V_CLAMP is 40–55 V; for high-side, it clamps to V_CC−41 V. These features eliminate need for external flyback diodes in standard 12 V/24 V motor applications.

Is the DIAG pin compatible with 3.3 V logic systems?

Yes-the DIAG pin is open-drain and rated for 5 V tolerant operation. When pulled up to 3.3 V via external resistor, it delivers valid logic-low (≤0.5 V at I_STAT = 1.6 mA) and high-impedance states compatible with 3.3 V microcontrollers without level-shifting.

VN771K-E 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):: 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

VN771K-E FAQ

1.How can I place an order for VN771K-E through Aetrix?

Please submit a Request for Quotation (RFQ) for VN771K-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 VN771K-E reliable?

The price and inventory of VN771K-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VN771K-E is usually 5 days.

3.What payment methods are accepted for VN771K-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VN771K-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VN771K-E?

VN771K-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VN771K-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 VN771K-E?

For technical support, including VN771K-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VN771K-E requirements.

6.How does Aetrix verify that VN771K-E is sourced from the original manufacturer or authorized distributors?

All VN771K-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 VN771K-E meets industry standards.

7.What is the process for return or replacement of VN771K-E?

All VN771K-E units undergo pre-shipment inspection (PSI). If there is an issue with VN771K-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 VN771K-E part is unused and in its original packaging.

Return procedure for VN771K-E:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…