STMicroelectronics L6386AD

Overview

L6386AD from STMicroelectronics is a high-voltage dual-channel gate driver IC designed for asymmetrical half-bridge topologies, capable of simultaneously driving high-side (up to 600 V rail) and low-side power MOSFETs or IGBTs. It delivers 400 mA source / 650 mA sink peak output current, achieves 50 ns rise / 30 ns fall times with 1 nF load, and integrates bootstrap diode and UVLO on both VCC and VBOOT rails - used in induction heating inverters and motor drives requiring robust dV/dt immunity (±50 V/ns).

For engineers reviewing the L6386AD datasheet, L6386AD pinout, L6386AD application, or L6386AD equivalent, key selection criteria include bootstrap driver R_DS(on) (125 Ω), CMOS/TTL Schmitt-trigger inputs with hysteresis, diagnostic open-drain output (DIAG), and SO-14 package compatibility with industrial thermal constraints (R_th(JA) = 165 °C/W).

Technical Context

The L6386AD implements independent high-side (floating) and low-side driver stages using BCD™ "offline" process technology, enabling operation with V_BOOT up to 618 V and V_OUT down to −3 V. Its integrated bootstrap driver replaces external fast-recovery diodes via a synchronously gated DMOS + series diode structure, reducing leakage and board area.

Logic interface uses CMOS/TTL-compatible Schmitt-trigger inputs (V_IL = 1.5 V, V_IH = 3.6 V) with internal pull-down, while fault protection includes comparator-based overcurrent detection (0.5 V reference), undervoltage lockout on both supply rails (V_CC UV thresholds: 9.1–10.1 V turn-on, 7.9–8.8 V turn-off), and diagnostic signaling via open-drain DIAG pin.

Key Specifications

Pinout & Package

The L6386AD is housed in a 14-pin SOIC (SO-14) package with standard 1.27 mm pitch, 8.55–8.75 mm body width, and 1.35–1.75 mm height, compliant with ECOPACK® environmental standards.

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 UCC27324D, the L6386AD uniquely combines integrated bootstrap diode, dual UVLO, and diagnostic output in a single SO-14 package - reducing BOM count and improving system-level fault resilience in 600 V industrial inverters.

Availability

L6386AD is available at Aetrix Electronics and suitable for induction heating inverters, industrial motor drives, and home appliance power stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for L6386AD 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The L6386AD belongs to ST's high-voltage gate driver product line, engineered specifically for robust, compact, and reliable control of power switches in mains-connected industrial and appliance applications.

FAQ

What is the maximum allowable dV/dt at the high-side output without false triggering?

The L6386AD guarantees ±50 V/ns dV/dt immunity across its full operating temperature range (−45 °C to +125 °C). This specification is verified under worst-case conditions including minimum supply voltages and maximum junction temperature, ensuring reliable operation in high-noise environments such as induction heating and motor drive inverters.

Can the L6386AD drive both N-channel MOSFETs and IGBTs in the same circuit?

Yes - the L6386AD is explicitly characterized for driving both 600 V N-channel MOSFETs and IGBTs. Its 400 mA source / 650 mA sink capability, 50/30 ns switching times with 1 nF load, and 600 V high-side rail rating meet the gate drive requirements of modern high-voltage power switches used in industrial and appliance inverters.

How does the integrated bootstrap diode affect PCB layout compared to discrete solutions?

The integrated bootstrap diode eliminates the need for an external high-voltage fast-recovery diode and its associated routing. This reduces parasitic inductance, removes one potential failure point, and allows tighter placement of C_BOOT near the VBOOT and PGND pins - improving bootstrap stability and simplifying layout for compact, high-density power boards.

Is the DIAG pin compatible with 3.3 V microcontrollers without level shifting?

Yes - the DIAG pin is an open-drain output with guaranteed low-level voltage ≤0.8 V at I_OD = −2.5 mA. When pulled up to 3.3 V with a standard 10 kΩ resistor, it delivers clean logic-low and logic-high signals fully compatible with 3.3 V MCU GPIO inputs, requiring no additional level-shifting circuitry.