STMicroelectronics L6392DTR

Overview

L6392DTR 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, and interlocking logic. It supports up to 600 V rail voltage, delivers 290 mA source / 430 mA sink gate drive, and achieves 75/35 ns rise/fall times with 1 nF load - used in motor control stages of industrial inverters and HID ballasts.

For engineers reviewing the L6392DTR datasheet, L6392DTR pinout, L6392DTR application, or L6392DTR equivalent, key selection criteria include dV/dt immunity (±50 V/ns), TTL/CMOS-compatible 3.3 V/5 V inputs with hysteresis, SO-14 package thermal resistance (120 °C/W), and integrated opamp with 8–12 MHz GBWP for field-oriented control feedback loops.

Technical Context

The L6392DTR integrates a floating high-side driver capable of operating with V_OUT up to 580 V and V_BOOT up to 620 V, using BCD™ "offline" process technology. Its level shifter ensures robust signal translation across the high-side isolation barrier while maintaining ±50 V/ns dV/dt immunity across −40 °C to +125 °C.

It embeds a rail-to-rail output opamp (V_OPOUT swing: 0.07–V_CC−4 V) with 6 mV input offset and 2.5–3.8 V/μs slew rate, configured for bidirectional current sensing in three-phase motor drives. Deadtime is externally adjustable via resistor-capacitor network on pin DT, supporting precise shoot-through prevention in PWM-controlled half-bridges.

Key Specifications

Pinout & Package

Package: SO-14 (ECOPACK® compliant), 8.55–8.75 mm × 3.80–4.00 mm body, 1.27 mm pitch, 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 L6392DTR uniquely combines integrated current-sense opamp, programmable deadtime, hardware interlock, and bootstrap DMOS - making it optimal for cost-sensitive, reliability-critical industrial motor drives requiring embedded protection and analog feedback.

Availability

L6392DTR is available at Aetrix Electronics and suitable for industrial motor inverters, HID lamp ballasts, home appliance drives, and industrial power supplies requiring stable component supply throughout long production lifecycles.

Supply support for L6392DTR 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The L6392DTR belongs to ST's high-voltage gate driver product line, engineered specifically for robust, integrated half-bridge control in motor drives and lighting systems where reliability, integration, and protection features are prioritized over raw speed.

FAQ

What is the maximum allowable bootstrap capacitor voltage drop during operation?

The L6392DTR's internal bootstrap DMOS has R_DS(on) ≈ 120 Ω. For a 30 nC gate charge and 5 μs charging time, voltage drop is ~0.7 V (calculated per Equation 3). Total C_BOOT droop must stay below V_{BO_thOFF} (9.1–10.9 V) to avoid UVLO - typically requiring C_BOOT ≥ 100 nF for 1–3 nF MOSFET gate loads.

Can the opamp be used for overcurrent protection without external components?

Yes - the opamp supports direct shunt-based current sensing. With OP+ and OP− connected across a 5–20 mΩ shunt, OPOUT can drive a comparator or MCU ADC. Its 6 mV offset and 55–70 dB CMRR enable ±1% full-scale accuracy down to 100 mA sensed current when calibrated, eliminating need for external instrumentation amps in basic protection schemes.

How does the interlocking function behave during simultaneous HIN and LIN high signals?

When both HIN and LIN are high, the internal logic forces both HVG and LVG into high-impedance tri-state mode - not active-high - preventing shoot-through. This behavior is hardware-implemented and independent of deadtime settings or external timing, providing fail-safe protection even if MCU firmware locks or glitches.

Is the L6392DTR compatible with 3.3 V-only microcontrollers without level shifters?

Yes - its logic inputs accept 3.3 V TTL/CMOS levels with guaranteed V_IH = 1.9–2.25 V and V_IL = 0.8–1.1 V. No external level shifting is required. The hysteresis (≈300 mV) further enhances noise immunity in electrically noisy motor drive environments.