STMicroelectronics VN770K13TR

Overview

VN770K13TR 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 9 A typical current limitation per channel, 220 mΩ total R_DS(on) per bridge side, and operates up to 36 V supply voltage. Used in bidirectional DC motor drives requiring integrated diagnostics and protection.

For engineers reviewing the VN770K13TR datasheet, VN770K13TR pinout, VN770K13TR application, or VN770K13TR equivalent, key selection criteria include thermal shutdown behavior, open-load detection timing (≤200 µs on-state), linear current limiting across temperature, and status flag diagnostic compatibility with microcontroller GPIO monitoring.

Technical Context

The VN770K13TR implements dual independent high-side drivers with thermal shutdown at 150–200 °C and reset hysteresis of 7–15 °C, plus two fully protected low-side OMNIFET II switches featuring overvoltage clamping (V_CLAMP = 40–55 V) and linear current limitation (7–13 A depending on V_CC and T_j). All channels support undervoltage lockout (3–5.5 V) and ESD protection (4–5 kV HBM).

Its diagnostic architecture provides open-drain status feedback indicating open-load (in both on/off states), overtemperature, and short-circuit faults. The device uses internal VIPower™ M0-3 technology for monolithic integration of logic, protection, and power stages - eliminating external flyback diodes and enabling compact PCB layout for brushed motor H-bridges.

Key Specifications

Pinout & Package

SO-28 surface-mount package with exposed thermal pad (as shown in Figure 53 and Figure 47 of Doc ID 8711 Rev 5); designed for PCB copper area heat sinking (6 cm² recommended for R_thj-amb optimization).

Key Features

Applications

Equivalent & Alternatives

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

Compared with VN770K13TR, VN772K13TR offers higher performance in current handling and thermal margin but at increased cost and footprint; TPS27082L provides superior single-channel specs but lacks integrated H-bridge topology and diagnostic consolidation - making it less suitable for compact motor control designs.

Availability

VN770K13TR is available at Aetrix Electronics and suitable for industrial motor control, automotive HVAC systems, and programmable logic controller (PLC) output modules requiring stable component supply and long-term lifecycle support.

Supply support for VN770K13TR 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, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.

VN770K13TR belongs to ST's VIPower™ smart power IC family, engineered specifically for robust, integrated motor drive and load switching applications where protection, diagnostics, and space efficiency are critical design constraints.

FAQ

What is the maximum continuous output current per channel?

The VN770K13TR features linear current limitation with a typical value of 9 A per channel under standard conditions (V_CC = 13 V, T_j = 25°C). Actual sustained current depends on PCB thermal design: with 6 cm² copper area, continuous operation up to 3 W power dissipation is achievable, corresponding to ~7 A at 36 V supply. Derating curves in Figure 24 confirm 5 A at 100°C case temperature.

How does the open-load detection work in off-state?

In off-state, open-load detection monitors the voltage at the DRAIN pin using an internal comparator with a 1.5–3.5 V threshold (V_OL). When the load is disconnected, the DRAIN floats high due to internal pull-up; crossing the threshold triggers the DIAGNOSTIC pin within ≤1000 µs. This function operates independently of input state and requires no external components.

Can VN770K13TR drive inductive loads without external flyback diodes?

Yes. Each low-side switch integrates an active overvoltage clamp that limits drain-source voltage to 40–55 V during inductive turn-off (Table 10, V_CLAMP). This eliminates the need for external freewheeling diodes in most 24 V motor applications. However, for loads exceeding 6 mH or operating above 36 V, external clamping may still be advised per Figure 12 and Table 10 specifications.

Is the DIAGNOSTIC pin compatible with 3.3 V microcontrollers?

Yes. The DIAGNOSTIC pin is open-drain with a maximum low-level output voltage of 0.5 V at 1.6 mA sink current (Table 9), ensuring reliable logic-low recognition by 3.3 V GPIOs. An external pull-up resistor (typically 4.7 kΩ to 3.3 V) is required. Leakage current remains below 10 µA (Table 9, I_LSTAT), minimizing power impact on low-power systems.