STMicroelectronics VN772KTR-E

Overview

VN772KTR-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 120 mΩ R_DS(on) per channel, 9 A typical current limitation, and operates up to 36 V supply voltage. Used in automotive DC motor drives requiring linear current limiting, open-load diagnostics, and integrated clamping.

For engineers reviewing the VN772KTR-E datasheet, VN772KTR-E pinout, VN772KTR-E application, or VN772KTR-E equivalent, key selection criteria include dual high-side/low-side topology, thermal shutdown at 150 °C, diagnostic flag with open-load detection in both ON/OFF states, and compliance with EU Directive 2002/95/EC (RoHS).

Technical Context

The device implements a hybrid architecture: high-side channels use VIPower™ M0-3 technology with built-in thermal shutdown and linear current limiting; low-side channels are fully autoprotected OMNIFET II MOSFETs featuring overvoltage clamping, 45 V drain-source clamp voltage, and 150 °C overtemperature shutdown. Both sides share common ground and V_CC rails but operate independently under separate logic inputs.

Diagnostic functionality is centralized on a single open-drain STATUS pin, reporting open-load (ON/OFF), overtemperature, undervoltage, and overvoltage faults via defined logic states per Table 19. Input hysteresis (0.5 V) and clamp protection (±0.7 V to 6.8 V) ensure robust noise immunity in automotive environments.

Key Specifications

Pinout & Package

SO-28 surface-mount package (18.1 mm × 10.65 mm × 2.65 mm body height) with standard gull-wing leads, compliant with JEDEC MS-012AC. Thermal resistance junction-to-case is 20 °C/W for both high-side and low-side sections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VN772KTR-E, VN771KTR-E lacks one high-side channel and cannot implement full H-bridge control, while TPS2H160-Q1 offers digital configurability but demands additional components and firmware to replicate integrated diagnostics and dual topology support.

Availability

VN772KTR-E is available at Aetrix Electronics and suitable for automotive seat control, industrial actuator drive, electric power steering auxiliary pumps, and medical infusion pump motor control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for VN772KTR-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, industrial, and power management ICs with vertical manufacturing capability and AEC-Q100 qualification expertise.

VN772KTR-E belongs to ST's VIPower™ smart power family, designed specifically for robust, integrated motor control in harsh automotive and industrial environments where reliability, diagnostics, and space-constrained packaging are critical.

FAQ

What is the maximum continuous output current per channel?

The VN772KTR-E supports 9 A typical current limitation per channel at T_j = 125 °C, with absolute maximum ratings allowing pulsed operation up to 15 A. Continuous current depends on PCB copper area, ambient temperature, and thermal interface - derating curves in Figure 28 show 6 A sustainable at T_c = 100 °C with 20 °C/W junction-to-case resistance.

How does open-load detection work in OFF state?

In OFF state, the device monitors voltage at the DRAIN pin: if V_DRAIN > V_OL (1.5–3.5 V), it asserts open-load fault on the DIAGNOSTIC pin. This occurs when no load is connected or wiring is broken, enabling detection before motor activation - delay is 1000 µs per Table 12.

Can VN772KTR-E drive inductive loads without external flyback diodes?

Yes - integrated clamp circuits protect both high-side (overvoltage shutdown at 36 V) and low-side (40–55 V drain-source clamp) against inductive kickback. External diodes are unnecessary for typical DC motor loads, though snubbers may be added for EMI suppression in high-dV/dt applications.

Is the DIAGNOSTIC pin compatible with 3.3 V microcontrollers?

Yes - the open-drain DIAGNOSTIC pin sinks current when active and requires an external pull-up to any logic rail (3.3 V or 5 V). Its VOL is 0.5 V at I_STAT = 1.6 mA, ensuring clean low-level recognition by 3.3 V MCUs with sufficient noise margin.