STMicroelectronics VN808SR

Overview

VN808SR from STMicroelectronics is an octal high-side driver IC in PowerSO-36 package, designed for industrial load switching with ground-referenced loads. It features 150 mΩ R_DS(on), 0.7 A per channel continuous output current, 45 V supply voltage rating, and integrated junction/case overtemperature protection with automatic restart. It is used in programmable logic controller (PLC) output modules compliant with IEC 61131.

For engineers reviewing the VN808SR datasheet, VN808SR pinout, VN808SR application, or VN808SR equivalent, key selection criteria include channel thermal independence, V_CC/2-compatible input logic, short-circuit current limitation (0.7–1.7 A), reverse polarity protection capability, and diagnostic STATUS pin behavior under fault conditions.

Technical Context

The VN808SR integrates eight independent VIPower M0-3 high-side switches with active current limiting and dual thermal shutdown thresholds-junction (T_TSD = 150–200 °C) and case (T_CSD = 125–135 °C)-each with dedicated hysteresis (7–15 °C). Non-overloaded channels remain operational during localized thermal events.

It implements loss-of-ground detection via internal monitoring of GND pin reverse current (–I_GND = –250 mA), undervoltage shutdown at V_USD = 7–10.5 V, and status reporting through an open-source STATUS pin that sinks current only during overtemperature or undervoltage faults.

Key Specifications

Pinout & Package

Package: PowerSO-36 - thermally enhanced surface-mount package with exposed metal tab (V_CC) for low R_thJC = 1.3 °C/W, suitable for high-power industrial PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VN808SR, IPS1030H offers higher current per channel but lacks multi-channel thermal autonomy and diagnostic reporting, while TPS27082L reduces footprint and adds quick-discharge but omits critical industrial protections like case overtemperature and ground-loss detection.

Availability

VN808SR is available at Aetrix Electronics and suitable for PLC output modules, industrial motor starter interfaces, building management system actuator control, and automated test equipment load matrices requiring stable component supply and long-term industrial lifecycle support.

Supply support for VN808SR 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 solutions with vertical manufacturing capabilities.

VN808SR belongs to ST's VIPower family of intelligent power switches, engineered specifically for robust, self-protected high-side load control in industrial automation and control systems.

FAQ

What is the maximum continuous current per channel under industrial ambient conditions?

The VN808SR delivers 0.7 A continuous per channel at T_C ≤ 100 °C with proper PCB thermal design (≥0.5 cm² copper on TAB pins). Derating is required above this case temperature, and the device enters current-limiting mode at ~1.7 A short-circuit current, verified per Table 6 in the datasheet.

How does the STATUS pin behave during overtemperature events?

The STATUS pin is an open-source output that sinks 2–4 mA only when either junction or case temperature exceeds its respective shutdown threshold (T_TSD or T_CSD). It remains high-impedance during normal operation, current limiting, or undervoltage conditions-only asserting during thermal or UVLO faults.

Can VN808SR drive inductive loads such as solenoids without external flyback components?

No external flyback diode is needed: the VN808SR includes internal clamp circuitry with V_demag = V_CC−52 to V_CC−47 V, limiting turn-off voltage spikes. This protects against inductive kickback for typical 24 V solenoids with L ≤ 6 mH, as confirmed in Table 7 and Figure 7 waveforms.

Is VN808SR still recommended for new designs given its "Obsolete" label in some documentation?

While marked "Obsolete Product(s)" in revision history footers, VN808SR remains actively manufactured and supported by STMicroelectronics with published order codes (e.g., VN808SR13TR), full datasheet maintenance, and availability through authorized distributors as of 2024. Its obsolescence notice applies only to earlier revisions-not the current production version.