STMicroelectronics L6390D

Overview

L6390D 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 drive strength, 75/35 ns rise/fall times (1 nF load), and integrated operational amplifier + comparator for current sensing and fast fault protection. It enables compact motor control in HVAC inverters and induction heating systems.

For engineers reviewing the L6390D datasheet, L6390D pinout, L6390D application, or L6390D equivalent, key selection criteria include bootstrap diode integration, adjustable deadtime (0.1–3.4 µs), smart shutdown propagation delay (<250 ns), and SO-16 package compatibility with industrial thermal requirements (R_th(JA) = 120 °C/W).

Technical Context

The L6390D implements matched high-side and low-side driver paths 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 V_BOOT, ensuring safe gate driving under brownout conditions.

It embeds a rail-to-rail op amp (±6 mV offset, 8–12 MHz GBWP) for precision current sensing and a comparator with internal 540 mV reference (V_REF) and <90 ns propagation delay for overcurrent detection. The SD/OD pin provides open-drain fault signaling and dual-function shutdown control.

Key Specifications

Pinout & Package

Package: SO-16 (Small Outline, 16-pin, 1.27 mm pitch, body size 10.3 × 7.5 mm), rated for industrial temperature range (−40 °C to +125 °C junction), 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 IR2110PbF and UCC27211D, the L6390D uniquely combines 600 V capability, integrated bootstrap diode, op amp, and comparator in SO-16-enabling complete half-bridge control and protection with only passive components, reducing design complexity and board area by ≥30%.

Availability

L6390D is available at Aetrix Electronics and suitable for HVAC inverters, induction heating systems, and industrial motor drives requiring stable component supply across multi-year production cycles.

Supply support for L6390D 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 microcontrollers, power ICs, sensors, and automotive-grade components since 1987.

The L6390D belongs to ST's BCD "offline" high-voltage driver product line, engineered specifically for robust, integrated gate driving in industrial motor control and resonant power conversion applications.

FAQ

What is the maximum allowable bootstrap capacitor voltage for the L6390D?

The L6390D specifies V_BOOT absolute maximum rating as −0.3 V to +620 V. This allows operation with 600 V DC bus voltages while maintaining 20 V headroom for transient spikes. Bootstrap capacitor selection must ensure voltage drop remains below 1.5 V during longest high-side on-time to maintain reliable gate drive.

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

Unlike conventional shutdown pins that merely disable logic inputs, the L6390D's smart shutdown uses a dedicated comparator-to-output path that forces immediate HVG/LVG turn-off within <250 ns of fault detection-bypassing input logic delay. The SD/OD pin simultaneously signals fault status via open-drain output, enabling coordinated system-level response without external timers.

Can the op amp in the L6390D be used for voltage sensing instead of current sensing?

Yes-the op amp supports rail-to-rail input common-mode range (0 to VCC−4 V) and can interface with resistive dividers for DC bus voltage monitoring. However, its primary design intent is bidirectional current sensing via shunt resistors; for precision voltage sensing, external scaling and filtering may be needed to meet accuracy targets beyond ±1%.

Is the L6390D compatible with 3.3 V microcontrollers without level shifting?

Yes-its LIN, HIN, and SD inputs accept 3.3 V TTL/CMOS logic levels with defined thresholds (V_IL ≤ 1.1 V, V_IH ≥ 1.9 V) and hysteresis. No external level shifters are required when interfacing with 3.3 V MCUs, simplifying control interface design and reducing component count.