STMicroelectronics VN808-E

Overview

VN808-E from STMicroelectronics is an octal high-side smart power switch fabricated in VIPower M0-3 technology, designed to drive grounded loads in industrial control systems. It delivers 0.7 A per channel, features 150 mΩ R_DS(on), operates up to 45 V supply, and integrates junction/case thermal shutdown with automatic restart. It is widely used in PLC output modules compliant with IEC 61131.

For engineers reviewing the VN808-E datasheet, VN808-E pinout, VN808-E application, or VN808-E equivalent, key selection criteria include per-channel current limitation (0.7 A), dual thermal protection thresholds (TJSD = 150–200 °C, TCSD = 125–135 °C), VCC/2-compatible logic inputs, and STATUS pin fault reporting for system diagnostics.

Technical Context

The VN808-E implements eight independent high-side power stages with active current limiting, where gate drive modulation holds output current at ~0.7 A during overload. Each channel includes dedicated thermal sensing for both junction (TJSD/TR) and case (TCSD/TCR) temperatures, with hysteresis (7–15 °C) enabling stable cycling between shutdown and recovery.

Its input stage accepts VCC/2-compatible logic (VINL = VCC/2 −1 V, VINH = VCC/2 +1 V) with 0.6 V hysteresis, while the open-source STATUS pin asserts high during any channel's junction or case overtemperature event. Protection against ground loss is implemented via internal detection of GND pin disconnection, forcing all outputs OFF.

Key Specifications

Pinout & Package

Package: PowerSO-36 (exposed VCC tab), RoHS-compliant ECOPACK® package with thermal resistance R_th(JC) = 1.3 °C/W, optimized for high-power dissipation on FR4 PCBs with ≥0.5 cm² copper area connected to TAB pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side smart switch applications.

Compared with VN808-E, STVN8008TR-E offers higher current per channel at the cost of increased conduction loss and thermal demand, while IPS2050H sacrifices channel count and system-level diagnostics for compactness and simplicity in low-density applications.

Availability

VN808-E is available at Aetrix Electronics and suitable for industrial PLC output modules, factory automation I/O terminals, HVAC actuator interfaces, and building management systems requiring stable component supply across long product lifecycles.

Supply support for VN808-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 intelligent power, microcontrollers, and analog/mixed-signal solutions for industrial, automotive, and consumer markets.

VN808-E belongs to ST's VIPower family of high-voltage smart power switches, engineered specifically for robust, high-reliability industrial control applications demanding integrated protection, diagnostics, and thermal resilience.

FAQ

What is the maximum continuous current per channel for VN808-E?

The VN808-E guarantees 0.7 A DC continuous output current per channel at 25 °C ambient with proper PCB copper area (≥0.5 cm²). Current derating applies above 100 °C case temperature, and thermal shutdown activates if junction temperature exceeds 150–200 °C or case temperature exceeds 125–135 °C.

How does the STATUS pin behave during fault conditions?

The STATUS pin is an open-source output that pulls high (2–4 mA sink capability) whenever any channel experiences junction overtemperature (TJ > TJSD) or case overtemperature (TC > TCSD). It remains low during normal operation and undervoltage conditions, providing a single-wire diagnostic signal for system-level fault logging.

Can VN808-E drive inductive loads such as relays or solenoids?

Yes - VN808-E is explicitly qualified for inductive loads, including relays and solenoids. Its built-in clamp voltage (VDEMAG = VCC−52 V) and controlled dV/dt (0.7–1.5 V/µs) suppress voltage spikes, while active current limiting prevents destructive peak currents during turn-on and short-circuit events.

Is the VN808-E pin-compatible with VN808-32-E?

No - although both share the PowerSO-36 package and functional architecture, VN808-32-E has different internal current-limiting thresholds (1 A vs. 0.7 A) and distinct thermal trip points. Pin mapping is identical, but electrical behavior differs; substitution requires validation of load current, thermal design, and protection timing margins.