STMicroelectronics L6392D

Overview

L6392D from STMicroelectronics is a high-voltage half-bridge gate driver IC for N-channel MOSFETs and IGBTs, featuring integrated bootstrap diode, operational amplifier for current sensing, adjustable deadtime (0.1–3.4 µs), interlocking logic, and ±50 V/ns dV/dt immunity. It operates with 3.3 V/5 V TTL/CMOS inputs and supports up to 600 V rail voltage in motor drives and HID ballasts.

For engineers reviewing the L6392D datasheet, L6392D pinout, L6392D application, or L6392D equivalent, key selection criteria include high-side floating capability, opamp-based current sensing interface, bootstrap driver integration, and shoot-through prevention via hardware interlock and programmable deadtime.

Technical Context

The L6392D integrates a level-shifting high-side driver with BCD™ "offline" process technology, enabling direct operation at up to 600 V V_BOOT–V_OUT. Its floating structure uses charge-pump-assisted bootstrap DMOS (R_DS(on) = 120 Ω) instead of an external diode, reducing leakage and bill-of-materials.

It embeds a rail-to-rail opamp (±4 V common-mode range, 8–12 MHz GBWP, 2.5–3.8 V/µs slew rate) configured for differential current sensing, and implements hardware interlocking plus resistor-programmable deadtime to prevent cross-conduction in half-bridge topologies.

Key Specifications

Pinout & Package

Package: SO-14 (ECOPACK® compliant, 8.55–8.75 mm × 3.80–4.00 mm body, 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 IR2110S and UCC27211D, the L6392D uniquely combines 600 V capability, integrated opamp, programmable deadtime, and bootstrap DMOS-reducing component count and enabling tighter current-loop control in space- and cost-sensitive industrial motor drives.

Availability

L6392D is available at Aetrix Electronics and suitable for home appliance motor control, industrial HVAC inverter drives, HID lamp ballasts, and factory automation servo drivers requiring stable component supply and long-term production continuity.

Supply support for L6392D 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 silicon solutions for automotive, industrial, and power applications.

The L6392D belongs to ST's high-voltage gate driver product line, engineered specifically for robust, integrated half-bridge control in motor drives, lighting, and industrial power conversion systems.

FAQ

What is the maximum recommended switching frequency for the L6392D?

The L6392D supports up to 800 kHz switching frequency with a 1 nF capacitive load, as specified in the recommended operating conditions. This limit arises from combined propagation delays (50–200 ns), rise/fall times (75/35 ns), and deadtime requirements. Exceeding 800 kHz may compromise timing margins and increase shoot-through risk, especially at elevated temperatures or with larger gate loads.

Can the integrated opamp be disabled or bypassed?

The opamp is automatically disabled when VCC enters undervoltage lockout (UVLO), below 10–11 V. It cannot be software-disabled or bypassed via pins; however, leaving OP+ and OP− unconnected or tying them to fixed potentials disables its function. The OPOUT pin remains high-impedance in UVLO, preventing unintended output behavior during power-up or brownout.

How does the internal bootstrap DMOS affect C_BOOT sizing?

The 120 Ω R_DS(on) of the internal bootstrap DMOS introduces a voltage drop (V_drop ≈ Q_gate/T_charge × 120 Ω) during capacitor recharge. For a 30 nC gate charge and 5 µs charging window, V_drop ≈ 0.7 V. Designers must add this drop to the total C_BOOT voltage loss budget-e.g., if 1 V total drop is acceptable, only 0.3 V remains for ESR and leakage effects.

Is the L6392D pin-compatible with earlier versions like L6392?

Yes-the L6392D is the current production version of the L6392 family in SO-14 package, with identical pinout, electrical characteristics, and functionality. Revision 6 (2015) removed DIP-14 support but confirmed SO-14 mechanical and thermal specs unchanged; all order codes (L6392D, L6392DTR) share full functional and physical compatibility with prior SO-14 variants.