STMicroelectronics VN5770AK-E

Overview

VN5770AK-E from STMicroelectronics is a quad smart power solid-state relay integrating two VIPower® M0-5 high-side switches and two VIPower® M0-3 OMNIFET II low-side switches in a single SO-28 package, designed for complete H-bridge DC motor control. It delivers 8.5A typical short-circuit current limit, 280mΩ total on-resistance per bridge side, 36V max supply voltage, and real-time proportional current sensing with thermal shutdown indication.

For engineers reviewing the VN5770AK-E datasheet, VN5770AK-E pinout, VN5770AK-E application, or VN5770AK-E equivalent, this device supports precise load current monitoring, inrush management in motor startup, fault-aware bridge commutation, and robust protection against overtemperature, overvoltage, and short circuits in automotive and industrial motion systems.

Technical Context

The VN5770AK-E implements dual independent high-side drivers with non-latching thermal shutdown (TTSD = 150–200°C, hysteresis = 7°C), active power limitation during overload, and analog current sense (K₀–K₃ calibration across load range) tied to a dedicated CURRENT SENSE pin. Each high-side switch features undervoltage shutdown at 4.5V (0.5V hysteresis) and clamp protection up to 52V.

Its two low-side switches provide linear current limitation, output overvoltage clamping, and thermal shutdown with fault feedback via input pin current rise. All four channels operate within -40°C to 150°C junction temperature, with SO-28 package thermal resistance of 10°C/W (high-side) and 7°C/W (low-side) junction-to-lead.

Key Specifications

Pinout & Package

Package: SO-28 (Small Outline, 28-pin, surface-mount, ECOPACK® compliant). Thermal performance optimized for PCB copper area per Figure 39; R_thj-case = 10°C/W (high-side), 7°C/W (low-side).

Key Features

Applications

Equivalent & Alternatives

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

Compared with VN5770AK-E, VN5E050AJTR-E offers lower RDS(on) but no system-level integration, while STSPIN820 provides digital control convenience at the cost of analog diagnostic capability and current capacity - making VN5770AK-E uniquely suited for high-fidelity brushed DC motor systems requiring embedded protection and sensing.

Availability

VN5770AK-E is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and medical device actuation requiring stable component supply and long-term lifecycle support.

Supply support for VN5770AK-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 power management, automotive ICs, and intelligent power solutions.

VN5770AK-E belongs to ST's VIPower® smart power family, engineered for robust, protected switching in harsh automotive and industrial environments where reliability, thermal resilience, and integrated diagnostics are critical.

FAQ

What is the maximum continuous output current per channel?

The VN5770AK-E does not specify a continuous current rating due to thermal dependency on PCB layout and ambient conditions. Its short-circuit current limit is 8.5A (typical at VCC = 13V), but continuous operation above 3A requires careful thermal design per Figure 39 and derating curves in Section 19. The device relies on thermal shutdown (150°C) and power limitation to prevent damage under sustained overload.

How does the CURRENT SENSE pin indicate thermal shutdown?

During high-side overtemperature, the CURRENT SENSE pin voltage shifts from its proportional analog range (up to 5V) to a fixed 9V flag level, while simultaneously drawing ~8mA sink current. This dual-mode signaling allows detection via either voltage threshold comparison or current monitoring, enabling fail-safe software response without additional components.

Can VN5770AK-E drive inductive loads without external flyback diodes?

Yes - the device integrates internal clamp circuitry on both high-side (clamp voltage 41–52V) and low-side (output overvoltage clamping) switches. This eliminates the need for external freewheeling diodes in most 12V/24V DC motor applications, though layout inductance and energy dissipation must still comply with the 32mJ maximum single-pulse specification (L = 3.7mH, Vbat = 13.5V).

Is /VERTEMP an open-drain output, and what drives it?

/VERTEMP is an active-low, open-drain output driven only by high-side thermal shutdown events. It remains high-impedance during normal operation and pulls low (<0.8V) when either high-side switch exceeds TTSD (150–200°C). An external pull-up resistor (typically 10kΩ to VCC) is required; the pin sinks ≤2mA and interfaces directly with standard CMOS logic inputs.