STMicroelectronics L6390DTR

Overview

L6390DTR from STMicroelectronics is a high-voltage half-bridge gate driver IC for N-channel MOSFETs and IGBTs, featuring 600 V high-side rail capability, ±50 V/ns dV/dt immunity, 290 mA source / 430 mA sink output drive, 75/35 ns rise/fall times (1 nF load), and integrated bootstrap diode. It enables robust motor control in inverter stages for PMAC and sensorless BEMF systems.

For engineers reviewing the L6390DTR datasheet, L6390DTR pinout, L6390DTR application, or L6390DTR equivalent, key selection criteria include deadtime adjustability (0.1–3.4 µs), smart shutdown propagation delay (<250 ns), operational amplifier for current sensing (±6 mV offset), and comparator-based fault protection with open-drain SD/OD pin.

Technical Context

The L6390DTR integrates matched high-side and low-side drivers with interlocking logic and programmable deadtime to prevent cross-conduction in half-bridge topologies. Its floating high-side section operates up to 600 V with UVLO on both VCC and VBO rails, ensuring safe gate driving under brownout conditions.

It embeds a rail-to-rail op amp (8–12 MHz GBWP, 2.5–3.8 V/µs slew rate) for precision current sensing and a comparator with internal 540 mV reference for fast overcurrent detection. The smart shutdown architecture bypasses external RC timing, delivering sub-250 ns fault-to-output disable latency.

Key Specifications

Pinout & Package

Package: SO-16 (Small Outline, 16-pin, surface-mount, 1.27 mm pitch). Thermal resistance R_th(JA) = 120 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage half-bridge gate driver applications.

Compared with IR2110STRPBF and UCC27211D, the L6390DTR uniquely combines 600 V capability, integrated bootstrap diode, op amp, and comparator in SO-16-reducing total component count by ≥4 while enabling single-chip current sensing and fault response under 250 ns.

Availability

L6390DTR is available at Aetrix Electronics and suitable for industrial motor drives, HVAC blower systems, and induction heating power stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for L6390DTR 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, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The L6390DTR belongs to ST's high-voltage gate driver product line, engineered specifically for robust, integrated half-bridge control in motor inverters and resonant power converters demanding reliability, compactness, and analog integration.

FAQ

What is the maximum recommended switching frequency for the L6390DTR?

The L6390DTR supports up to 800 kHz switching frequency with a 1 nF capacitive load, as confirmed in Section 3.3 of the datasheet (DocID14493 Rev 11). This limit assumes proper thermal management (SO-16 R_th(JA) = 120 °C/W) and stable bootstrap capacitor charging during each low-side conduction period.

Does the L6390DTR require an external bootstrap diode?

No. The L6390DTR integrates a patented high-voltage DMOS-based bootstrap driver that replaces the external fast-recovery diode. As described in Section 9 of the datasheet, this structure reduces leakage, saves PCB area, and eliminates one BOM item while maintaining reliable high-side supply under all operating conditions.

How does the smart shutdown function differ from conventional shutdown inputs?

Unlike standard shutdown inputs that rely on external RC networks for timing, the L6390DTR's smart shutdown uses a dedicated internal path from comparator output directly to driver outputs-achieving <250 ns fault-to-disable latency. This bypasses external timing components and ensures immediate protection regardless of RC values, as detailed in Section 7 of the datasheet.

Can the op amp in the L6390DTR be used for voltage sensing instead of current sensing?

Yes-the op amp supports differential input (OP+ and OP−) with common-mode range from 0 V to VCC−4 V, making it suitable for isolated DC-link voltage monitoring when paired with appropriate resistive dividers. However, its primary design intent and characterization (Table 7) focus on current-sense applications with shunt resistors.