STMicroelectronics VND920

Overview

VND920 from STMicroelectronics is a dual-channel high-side solid-state relay (HSR) built on VIPower M0-3 technology, designed for automotive and industrial load switching where one side of the load connects to ground. It delivers 35 A per channel, features 16 mΩ R_DS(on), operates up to 36 V V_CC, and integrates proportional current sense, thermal shutdown, short-circuit protection, and reverse battery protection - used in body control modules and smart fuse applications.

For engineers reviewing the VND920 datasheet, VND920 pinout, VND920 application, or VND920 equivalent, key selection criteria include per-channel current capability (35 A), analog current sense ratio (4400 ±8% at 10 A), SO-28 double-island thermal performance (R_thj-amb = 42 °C/W with both channels active), ISO 7637-2 transient immunity (Class C across all pulses), and undervoltage/overvoltage lockout thresholds (4 V / 36 V).

Technical Context

The VND920 implements two independent high-side power switches with integrated protection logic per channel: active V_CC clamp (41–55 V), current-limiting circuitry (30–75 A depending on V_CC and temperature), and thermal shutdown at 150–200 °C with 135 °C reset hysteresis. Each channel includes CMOS-compatible input (1.25 V low, 3.25 V high) and dedicated analog current sense output with 500 µs response delay.

Its SO-28 double-island package thermally isolates the two chips, enabling independent thermal management and supporting simultaneous full-load operation. Protection against loss of ground or V_CC is implemented via internal detection circuits that force automatic turn-off, while reverse battery tolerance is achieved through external network design guidance (e.g., DGND diode + 1 kΩ resistor).

Key Specifications

Pinout & Package

SO-28 double-island package with thermally isolated die islands for independent thermal management and enhanced reliability under dual-channel full-load operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN250 and TPS27082L, the VND920 uniquely combines dual-channel architecture, 35 A per channel, integrated current sense with ±8% accuracy, and full ISO 7637-2 Class C compliance - making it the only option qualified for automotive BCM and EPS auxiliary load control without external protection components.

Availability

VND920 is available at Aetrix Electronics and suitable for automotive body control modules, industrial smart power distribution units, electric power steering auxiliary systems, and commercial vehicle lighting control requiring stable component supply across extended temperature ranges (-40°C to +150°C).

Supply support for VND920 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 capabilities and AEC-Q100 qualification expertise.

The VND920 belongs to ST's VIPower family of intelligent power switches, engineered specifically for automotive high-side load control with integrated diagnostics, protection, and robustness against harsh electrical environments.

FAQ

What is the maximum continuous output current per channel?

The VND920 supports 35 A continuous per channel under specified thermal conditions: mounted on a standard FR-4 board with ≥1 cm² copper area per island, ambient temperature ≤25°C, and both channels operating simultaneously. Derating applies above 25°C ambient or with reduced copper area - see R_thj-amb = 42 °C/W (dual ON) in thermal data section.

How does the current sense output interface with a microcontroller ADC?

The CURRENT SENSE pin delivers an analog current I_SENSE = I_OUT/K (K ≈ 4400), requiring a pull-up resistor (typically 3.9 kΩ to V_CC) to convert to voltage. With 10 A load, this yields ~2.56 V; with 30 A, ~6.82 V - exceeding most 3.3 V ADCs. Use a voltage divider or op-amp buffer to scale within 0–3.3 V range while maintaining <10 µA loading error.

Can the VND920 drive inductive loads like solenoids or motors?

Yes - the VND920 includes active demagnetization clamping (V_demag = V_CC − 41 V to V_CC − 55 V) and supports inductive energy dissipation up to 355 mJ (L = 0.25 mH, I_L = 45 A). For larger inductances, external freewheeling diodes or snubbers may be needed to limit V_OUT overshoot beyond clamp limits.

What external components are required for reverse battery protection?

Two validated solutions exist: (1) A series diode (DGND) in the ground path with a 1 kΩ parallel resistor for inductive loads, or (2) a ground-line resistor (RGND) sized per RGND ≤ 600 mV / ΣI_ON(max). ST recommends DGND for multi-device systems due to stable input threshold shift (~600 mV), whereas RGND causes variable shift dependent on number of active channels.