STMicroelectronics L6393DTR

Overview

L6393DTR from STMicroelectronics is a high-voltage half-bridge gate driver IC for N-channel MOSFETs and IGBTs, featuring 600 V high-side floating 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 bootstrap diode. It enables motor control in home appliance inverters and industrial fan drives.

For engineers reviewing the L6393DTR datasheet, L6393DTR pinout, L6393DTR application, or L6393DTR equivalent, key selection criteria include adjustable deadtime via external resistor, uncommitted comparator for overcurrent protection, 3.3 V/5 V CMOS/TTL logic compatibility, and SO-14 package thermal resistance of 120 °C/W.

Technical Context

The L6393DTR implements a dual-driver architecture with independent high-side (floating) and low-side sections fabricated in BCD™ "offline" technology. Its logic interface uses PHASE and BRAKE inputs fed into an AND gate to determine output phase relationship - enabling forward/reverse control and active braking via low-side conduction.

Deadtime is externally set via a resistor on the DT pin (0.1–3.4 µs range), while the integrated bootstrap driver replaces discrete diodes using a synchronous DMOS structure with 120 Ω typical R_DS(on). The uncommitted comparator (CP+, CP−, CPOUT) supports system-level protections with 90–130 ns propagation delay and 15 mV input offset.

Key Specifications

Pinout & Package

Package: SO-14 (ECOPACK® compliant, 8.55 × 5.8 mm body, 1.27 mm pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR2104S and UCC27201D, the L6393DTR uniquely combines 600 V capability, integrated bootstrap, adjustable deadtime, and a dedicated comparator - making it optimal for cost-sensitive, space-constrained motor drives needing self-contained protection.

Availability

L6393DTR is available at Aetrix Electronics and suitable for home appliance motor control, industrial fan drives, and HID ballast designs requiring stable component supply and long-term manufacturing continuity.

Supply support for L6393DTR 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, and microcontroller solutions for industrial, automotive, and consumer markets.

The L6393DTR belongs to ST's high-voltage gate driver product line, engineered specifically for robust, integrated motor control in cost-sensitive white goods and industrial equipment.

FAQ

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

The L6393DTR's bootstrap driver introduces a voltage drop determined by Q_gate × R_DS(on) / T_charge, with R_DS(on) = 120 Ω typical. For a 30 nC MOSFET gate charge and 5 µs charging time, the drop is ~0.7 V. Total CBOOT voltage loss must stay below V_{BO_thOFF} (7.3 V) to avoid UVLO shutdown - requiring careful CBOOT sizing and layout to minimize ESR and inductance.

How does the BRAKE input function in motor control applications?

When BRAKE is pulled low, the L6393DTR forces LVG high and HVG low regardless of PHASE state - enabling active freewheeling or dynamic braking in BLDC and induction motor drives. This provides controlled current decay through the low-side FET, reducing heat generation compared to passive decay modes, and is commonly used during emergency stops or torque limiting.

Can the uncommitted comparator be used for overtemperature protection?

Yes - the comparator can monitor voltage from an NTC thermistor divider connected to CP+ and CP−. With 15 mV input offset and 90 ns response, it supports fast thermal cutoff before junction temperature exceeds 125 °C. The open-drain CPOUT output can directly drive an optocoupler or latch circuit to disable PWM generation, providing hardware-level safety independent of firmware.

What layout considerations are critical for stable high-dV/dt operation?

Minimize loop area between BOOT, OUT, and LVG pins to reduce parasitic inductance that exacerbates dV/dt stress. Place the 100 nF bootstrap capacitor within 3 mm of BOOT and OUT pins using short, wide traces. Route GND and VCC with dedicated planes; isolate high-side switching noise from logic inputs using guard rings. Avoid routing PHASE/BRAKE near HVG or OUT traces to prevent coupling-induced false triggering.