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

STMicroelectronics VN771KPTR-E

Name: VN771KPTR-E
Brand: STMicroelectronics
SKU: VN771KPTR-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VN771KPTR-E

Manufacturer:: STMicroelectronics

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

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

Datasheet:: VN771KPTR-E.pdf

Description:: IC HALF BRIDGE DRIVER 9A 28SO

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Product details

Overview

VN771KPTR-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 limitation per channel, 95 mΩ on-resistance (per bridge side), 36 V max supply voltage, and real-time open-load/over-temperature diagnostics via open-drain status flag - deployed in automotive seat/mirror actuators and industrial DC motor drives.

For engineers reviewing the VN771KPTR-E datasheet, VN771KPTR-E pinout, VN771KPTR-E application, or VN771KPTR-E equivalent, key selection criteria include linear current limiting behavior, dual high-side + dual low-side topology, integrated undervoltage/overvoltage protection, thermal shutdown with 150–200 °C trip range, and SO-28 thermal resistance (R_thj-case = 20 °C/W).

Technical Context

The device implements a monolithic chipset architecture: two independent high-side switches with built-in thermal shutdown and linear current limiters, plus two fully protected low-side OMNIFET II MOSFETs featuring overvoltage clamping and auto-recovery fault handling. Each channel supports diagnostic feedback through shared status pin with open-drain output.

Control logic follows a truth table defining four distinct switch states (H-bridge forward/reverse/brake/coast), with input hysteresis (0.5 V) and clamp protection on all pins. Protection mechanisms include undervoltage lockout (4 V typ), overvoltage shutdown (36 V), and thermal intervention detection via input pin voltage monitoring.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Max	36 V - Absolute maximum operating supply voltage; enables compatibility with 24 V automotive systems.
R_DS(on)	95 mΩ - Total on-resistance of one H-bridge side at T_j = 25 °C; determines conduction loss and thermal rise under 9 A load.
I_OUT Limit	9 A typ - Linear current limitation threshold per channel; prevents destructive short-circuit currents without latch-off.
T_TSD	150–200 °C - Thermal shutdown activation range; provides graded protection with 15 °C hysteresis for safe recovery.
V_OL Threshold	1.5–3.5 V - Open-load off-state detection voltage window; enables reliable disconnection sensing without external comparators.
t_d(on/off)	30 µs typ - Turn-on/turn-off delay time at V_CC = 13 V with 6.5 Ω load; supports PWM frequencies up to ~15 kHz.
V_CLAMP	40–55 V - Drain-source clamping voltage during inductive turn-off; suppresses voltage spikes from 6 mH motor windings.

Pinout & Package

SO-28 surface-mount package with exposed thermal pad (standard JEDEC outline); designed for PCB copper area ≥6 cm² to achieve R_thj-amb ≤ 40 °C/W in free-air conditions.

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 enable input for low-side switch 3; TTL/CMOS compatible (V_IL ≤ 1.25 V, V_IH ≥ 3.25 V).
5, 10, 19, 24	VCC	Main power supply rail for both high-side switches and internal biasing; accepts 5.5–36 V DC.
6	GND	Reference ground for high-side drivers; must be connected to system ground with low-inductance path.
7, 9	INPUT 1 / INPUT 2	Independent logic inputs for dual high-side switches; support PWM or static control of upper bridge arms.
8	DIAGNOSTIC	Shared open-drain status output; pulls low during open-load (on/off), over-temperature, or undervoltage fault.
12, 14, 15, 18	DRAIN 4	Power output terminal for low-side switch 4; completes second half-bridge leg with DRAIN 3.
13	INPUT 4	Logic input for low-side switch 4; synchronized switching with INPUT 3 enables full H-bridge commutation.
16, 17	SOURCE 4	Source terminal of low-side switch 4; tied internally to GND but accessible for Kelvin sensing or layout optimization.
20, 21	SOURCE 2	Source terminal of high-side switch 2; referenced to VCC rail and used for current-sense resistor placement.
22, 23	SOURCE 1	Source terminal of high-side switch 1; electrically isolated from GND and requires floating gate drive design.
26, 27	SOURCE 3	Source terminal of low-side switch 3; connects directly to system ground plane for minimal EMI loop area.

Key Features

Feature	Design Value
Integrated H-bridge driver chipset	Two VIPower™ high-side + two OMNIFET II low-side switches in single SO-28 package - eliminates discrete gate driver complexity and layout mismatch.
Linear current limitation	9 A typical limit with temperature compensation (I_LIM vs T_case curve) - sustains controlled operation during stall or overload without hard shutdown.
Real-time diagnostics	Single open-drain DIAGNOSTIC pin reporting open-load (on/off), over-temperature, and undervoltage faults - reduces MCU GPIO count and simplifies firmware polling.
Robust protection suite	Clamped V_DS (45 V typ), ESD rating ≥4 kV (HBM), -0.3 V reverse V_CC, and 150–200 °C thermal shutdown - meets automotive AEC-Q100 stress requirements.
Low standby power	12 µA typical supply current in off-state at 13 V - enables always-on applications like body control modules with minimal battery drain.

Applications

Automotive Seat Actuators

Industrial Conveyor Drives

Use Scenario: Bidirectional positioning of powered vehicle seats using 12 V DC motors with mechanical end-stop detection.

IC Role / Device Role / Timing Role: Quad-channel H-bridge controller managing forward/reverse/brake states; status pin signals open-load when motor stalls against limit switch.

Use Value: Eliminates need for external current sense amplifiers and discrete protection diodes while maintaining ASIL-B–compatible fault reporting.

Use Scenario: Speed-controlled belt conveyors in packaging lines requiring soft-start, direction reversal, and jam detection.

IC Role / Device Role / Timing Role: Motor interface IC delivering PWM-controlled torque with linear current limiting to prevent belt slippage or gear damage.

Use Value: Enables precise stall current thresholding (6–15 A range) and thermal derating without external thermal sensors or shutdown latching.

Medical Pump Controllers

Robot Joint Actuation

Use Scenario: Precision peristaltic pumps in infusion devices where motor current correlates directly with fluid flow rate.

IC Role / Device Role / Timing Role: Current-regulated H-bridge driver with diagnostic feedback for pump occlusion detection via open-load on-state threshold (50–200 mA).

Use Value: Provides deterministic current limiting and fast (<200 µs) open-load response - critical for FDA Class II safety compliance and alarm latency.

Use Scenario: Compact joint actuators in collaborative robots requiring bidirectional torque, position holding, and fault-safe stop.

IC Role / Device Role / Timing Role: Integrated power stage enabling active braking (coast-to-brake transition) and real-time thermal margin monitoring via status pin pulse width.

Use Value: Reduces BOM by consolidating four power switches, protection, and diagnostics into one footprint - accelerating CE-certified robot development.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STSPIN840	Single-chip 3-phase BLDC driver with integrated gate drivers; no discrete high-side/low-side separation or status pin.	Designed for sensorless BLDC commutation, not brushed DC H-bridge control; lacks open-load diagnostics and linear current limiting.	Select when driving 3-phase motors with trapezoidal commutation; avoid for brushed DC or diagnostic-critical applications.
TPS2H160-Q1	Dual-channel high-side switch only (no low-side integration); 160 mΩ R_DS(on), 12 A current limit, SPI-configurable diagnostics.	Requires external low-side FETs and separate logic for H-bridge; offers programmable fault thresholds but doubles component count.	Choose for high-voltage (40 V) automotive loads needing configurable reporting; not suitable for space-constrained quad-switch designs.

Compared with STSPIN840 and TPS2H160-Q1, the VN771KPTR-E uniquely integrates matched high-side/low-side pairs with unified diagnostics in SO-28, enabling compact brushed DC H-bridge designs with deterministic current limiting and single-pin fault visibility - critical for cost-sensitive, safety-aware motion systems.

Availability

VN771KPTR-E is available at Aetrix Electronics and suitable for automotive seat actuation, industrial conveyor control, medical infusion pumps, and collaborative robot joint drives requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for VN771KPTR-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 solutions with ISO/TS 16949 certified manufacturing.

The VN771K belongs to ST's VIPower™ smart power family, engineered specifically for robust, diagnostic-rich motor control in harsh environments - emphasizing thermal resilience, integrated protection, and functional safety readiness.

FAQ

What is the recommended PCB layout for thermal management of VN771KPTR-E?

Use ≥6 cm² of 2-oz copper connected to the exposed thermal pad under the SO-28 package, with ≥6 thermal vias (0.3 mm diameter) to inner/ground planes. Maintain minimum 0.5 mm clearance between VCC/GND pins and high-current traces. Avoid routing signal traces under the IC body to preserve thermal conduction path.

How does the linear current limitation behave under varying junction temperatures?

Current limit decreases linearly from 9 A at 25 °C to ~6 A at 125 °C (per Figure 13), ensuring safe operation during sustained overload. This slope is inherent to VIPower™ M0-3 technology and requires no external compensation - enabling predictable thermal foldback without software intervention.

Can the DIAGNOSTIC pin distinguish between open-load and over-temperature faults?

Yes: open-load in on-state triggers immediate low pulse (t_DOL(on) ≤ 200 µs); open-load in off-state produces delayed low pulse after 1 ms; over-temperature causes sustained low state until junction cools below reset threshold (135 °C). Pulse width and timing differentiate fault types in firmware.

Is external flyback diode required when driving inductive loads?

No - integrated clamping circuits limit V_DS to 45 V typical during inductive turn-off (Table 12), eliminating need for external diodes with 6 mH motors at 36 V supply. However, layout inductance must be minimized; parasitic L_PKG >10 nH may cause overshoot beyond clamp rating.

VN771KPTR-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

VN771KPTR-E FAQ

1.How can I place an order for VN771KPTR-E through Aetrix?

Please submit a Request for Quotation (RFQ) for VN771KPTR-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 VN771KPTR-E reliable?

The price and inventory of VN771KPTR-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VN771KPTR-E is usually 5 days.

3.What payment methods are accepted for VN771KPTR-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VN771KPTR-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VN771KPTR-E?

VN771KPTR-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VN771KPTR-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 VN771KPTR-E?

For technical support, including VN771KPTR-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VN771KPTR-E requirements.

6.How does Aetrix verify that VN771KPTR-E is sourced from the original manufacturer or authorized distributors?

All VN771KPTR-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 VN771KPTR-E meets industry standards.

7.What is the process for return or replacement of VN771KPTR-E?

All VN771KPTR-E units undergo pre-shipment inspection (PSI). If there is an issue with VN771KPTR-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 VN771KPTR-E part is unused and in its original packaging.

Return procedure for VN771KPTR-E:

1.Submit a request within 90 days.

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

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