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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Gate Drivers

STMicroelectronics L6391DTR

Name: L6391DTR
Brand: STMicroelectronics
SKU: L6391DTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6391DTR

Manufacturer:: STMicroelectronics

Category:: Gate Drivers

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: L6391DTR.pdf

Description:: IC GATE DRVR HALF-BRIDGE 14SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L6391DTR 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 bootstrap diode. It enables robust motor control in industrial inverters and HID ballasts.

For engineers reviewing the L6391DTR datasheet, L6391DTR pinout, L6391DTR application, or L6391DTR equivalent, this page delivers verified technical context, validated pin functions, confirmed deadtime adjustability, real-world fault protection behavior, and precise SO-14 package mapping - all grounded in ST's production-grade documentation.

Technical Context

The L6391DTR integrates dual independent gate drivers: a low-side section referenced to GND (VCC = 12.5–20 V) and a floating high-side section capable of operating up to 600 V referenced to OUT. Its logic inputs (LIN, HIN, DT, SD/OD) accept 3.3 V/5 V TTL/CMOS signals with hysteresis, enabling direct microcontroller interfacing without level-shifting.

It implements hardware-based shoot-through prevention via interlocking logic and adjustable deadtime (0.1–3.4 µs via external R_DT/C_DT), plus a dedicated comparator (CP+, CP−) with <130 ns propagation delay feeding a smart shutdown path that forces both outputs low within 250 ns of fault detection - bypassing external RC timing dependencies.

Key Specifications

Parameter	Value and Actual Design Meaning
High-side voltage rating	600 V max rail - supports direct connection to 400 V DC bus in industrial motor drives and HID ballasts.
dV/dt immunity	±50 V/ns - ensures reliable operation under fast-switching noise in high-power half-bridge topologies.
Output drive current	290 mA source / 430 mA sink - sufficient to rapidly charge/discharge 1 nF gate capacitance with 75/35 ns transitions.
Logic input compatibility	3.3 V/5 V TTL/CMOS with hysteresis - eliminates need for external Schmitt triggers when driven by MCU GPIOs.
Integrated bootstrap diode	On-chip DMOS + diode structure - removes external HV fast-recovery diode, reducing BOM count and leakage-related boot voltage droop.
Comparator response time	90–130 ns delay - enables sub-microsecond overcurrent fault detection and immediate gate shutdown.
Adjustable deadtime range	0.1–3.4 µs via R_DT/C_DT - allows precise tuning to prevent cross-conduction across wide temperature and load conditions.

Pinout & Package

Package: SO-14 (ECOPACK® compliant, 8.75 mm × 4.00 mm body, 1.27 mm pitch).

Pin/Terminal	Circuit Role	Design Meaning
1 LIN	Low-side logic input	Active-low signal controlling LVG output; compatible with 3.3 V/5 V logic and includes hysteresis.
2 SD/OD	Shutdown input / open-drain fault output	Dual-function pin: active-low shutdown control and comparator fault indicator with internal pull-down.
3 HIN	High-side logic input	Active-high signal controlling HVG output; CMOS/TTL compatible with 1.9–2.25 V threshold.
4 VCC	Low-side supply	12.5–20 V power for low-side driver and logic; includes UVLO with 1.5 V hysteresis.
5 DT	Deadtime setting	Analog input configuring deadtime via external resistor/capacitor network (0.1–3.4 µs range).
6 NC	No connect	Internally unconnected; must remain floating per datasheet.
7 GND	Ground reference	Common return for low-side circuitry and comparator inputs; separate from floating high-side ground.
8 CP−	Comparator negative input	Inverting input for overcurrent/overtemperature sensing; accepts 0–VCC voltage range.
9 CP+	Comparator positive input	Non-inverting input for fault sensing; 15 mV offset enables accurate shunt-based current monitoring.
10 LVG	Low-side gate output	Push-pull driver output capable of 430 mA sink; directly drives N-MOSFET gate to GND.
11 NC	No connect	Internally unconnected; must remain floating.
12 OUT	Floating common node	Reference point for high-side section; connects to source of high-side MOSFET/IGBT.
13 HVG	High-side gate output	Floating push-pull output rated for 600 V offset; drives gate of high-side N-device relative to OUT.
14 BOOT	Bootstrap supply	Input for bootstrapped high-side supply; internal DMOS diode charges C_BOOT during LVG on-time.

Key Features

Feature	Design Value
Smart shutdown architecture	Direct comparator-to-output path achieves ≤250 ns fault-to-shutdown latency - independent of external RC timing components.
Interlocking logic	Hardware-enforced mutual exclusion prevents simultaneous HVG/LVG activation, eliminating shoot-through risk even with noisy inputs.
Integrated bootstrap driver	On-die DMOS + diode replaces external HV diode, reducing leakage, board space, and component count while maintaining >12 V boot margin.
Adjustable deadtime	Programmable 0.1–3.4 µs deadtime via single resistor/capacitor - enables optimization for varying switching frequencies and device characteristics.
Comparator with open-drain output	Dedicated CP+/CP− inputs and shared SD/OD pin allow flexible fault signaling, latching, or cascaded protection across multiple half-bridges.

Applications

Industrial Motor Drives

HID Lamp Ballasts

Use Scenario: Three-phase inverter driving 0.5–3 kW induction motors in factory automation systems with 400 V DC bus.

IC Role / Device Role / Timing Role: Half-bridge gate driver providing isolated high-side switching and synchronized low-side control with programmable deadtime.

Use Value: 600 V rail rating and ±50 V/ns dV/dt immunity ensure stable operation during rapid bus transients in variable-frequency drives.

Use Scenario: Resonant half-bridge topology powering 70–250 W high-intensity discharge lamps in street lighting systems.

IC Role / Device Role / Timing Role: Gate driver delivering precise 100–500 kHz switching with minimal propagation skew between HVG and LVG outputs.

Use Value: 75/35 ns rise/fall times and <30 ns matching enable clean zero-voltage switching (ZVS) transitions critical for lamp ignition and efficiency.

Home Appliance Inverters

Power Supply Units

Use Scenario: Variable-speed compressor control in inverter air conditioners using single-shunt current sensing.

IC Role / Device Role / Timing Role: Gate driver with integrated comparator enabling overcurrent protection via CP+/CP− pins and smart shutdown.

Use Value: Shared SD/OD pin allows direct connection to MCU interrupt line, reducing component count and fault response latency to <1 µs.

Use Scenario: High-efficiency LLC resonant converter in telecom PSUs requiring reliable 100–300 kHz half-bridge operation.

IC Role / Device Role / Timing Role: High-voltage gate driver managing synchronous rectification timing and bootstrap supply regeneration.

Use Value: Integrated bootstrap diode maintains >12 V gate drive margin at 200 kHz, eliminating diode reverse recovery losses and thermal derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IR2110STRPBF	Higher 600 V rating but no integrated bootstrap diode; requires external HV diode and lacks comparator-based fault protection.	Used in legacy industrial inverters where discrete protection is already implemented; less suitable for compact, fault-integrated designs.	Select when existing layout accommodates external diode and system-level fault handling is preferred over integrated smart shutdown.
UCC27211D	Lower 120 V high-side rating; no bootstrap integration; faster 12 ns propagation delay but no deadtime adjustment or comparator.	Targeted at low-voltage synchronous buck or half-bridge converters (<60 V bus); unsuitable for 400 V+ applications.	Choose only for low-voltage, high-frequency DC-DC where 600 V capability and fault intelligence are unnecessary.

Compared with IR2110STRPBF and UCC27211D, the L6391DTR uniquely combines 600 V capability, integrated bootstrap, hardware interlock, adjustable deadtime, and comparator-driven smart shutdown - making it optimal for space-constrained, safety-critical industrial and lighting inverters requiring minimal external components and deterministic fault response.

Availability

L6391DTR is available at Aetrix Electronics and suitable for industrial motor drives, HID ballasts, home appliance inverters, and telecom power supply units requiring stable component supply across multi-year production cycles.

Supply support for L6391DTR 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, specializing in power management, analog, and microcontroller solutions for industrial, automotive, and consumer markets.

The L6391DTR belongs to ST's BCD™ "OFF-LINE" high-voltage driver product line, engineered specifically for robust, integrated half-bridge control in AC-DC and DC-AC conversion systems operating up to 600 V.

FAQ

What is the maximum allowable dV/dt at the HVG pin, and how is it tested?

The L6391DTR guarantees ±50 V/ns dV/dt immunity across its full operating temperature range (−40 °C to +125 °C). This specification is verified per ST's production test flow using controlled step-edge waveforms applied to the HVG pin while monitoring LVG/HVG output stability and internal logic integrity - confirming no false triggering or latch-up under worst-case transient conditions.

Can the L6391DTR drive both MOSFETs and IGBTs, and what design considerations differ?

Yes, the L6391DTR is qualified to drive both N-channel MOSFETs and IGBTs. For MOSFETs, gate drive strength (290 mA source/430 mA sink) and 75/35 ns transition times optimize switching speed. For IGBTs, the same drive capability ensures adequate turn-on gate charge injection, while the 600 V rating and dV/dt immunity accommodate IGBT tail-current-induced voltage spikes - no external components required for either device type.

How does the smart shutdown function differ from standard shutdown in competing gate drivers?

Unlike conventional shutdown paths that rely on external RC networks and propagate through logic gates, the L6391DTR's smart shutdown routes the comparator output directly to the output stage, forcing HVG and LVG low within ≤250 ns - independent of SD pin timing. This eliminates delay uncertainty caused by external component tolerances and ensures deterministic fault response critical for motor overcurrent and short-circuit protection.

Is an external bootstrap diode required, and what is the impact of omitting it?

No external bootstrap diode is required: the L6391DTR integrates a patented DMOS + diode structure that replaces the traditional HV fast-recovery diode. Omitting the external diode reduces BOM cost, PCB area, and leakage-induced boot voltage droop - verified to maintain >12 V gate drive margin at 200 kHz with typical 100 nF C_BOOT, as confirmed in ST's application note AN4241.

L6391DTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Driven Configuration:: Half-Bridge

Channel Type:: Independent

Number of Drivers:: 2

Gate Type:: IGBT, N-Channel MOSFET

Voltage - Supply:: 12.5V ~ 20V

Logic Voltage - VIL, VIH:: 1.1V, 1.9V

Current - Peak Output (Source, Sink):: 290mA, 430mA

Input Type:: Non-Inverting

High Side Voltage - Max (Bootstrap):: 600 V

Rise / Fall Time (Typ):: 75ns, 35ns

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

L6391DTR FAQ

1.How can I place an order for L6391DTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L6391DTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for L6391DTR reliable?

The price and inventory of L6391DTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6391DTR is usually 5 days.

3.What payment methods are accepted for L6391DTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6391DTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6391DTR?

L6391DTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6391DTR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for L6391DTR?

For technical support, including L6391DTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6391DTR requirements.

6.How does Aetrix verify that L6391DTR is sourced from the original manufacturer or authorized distributors?

All L6391DTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L6391DTR meets industry standards.

7.What is the process for return or replacement of L6391DTR?

All L6391DTR units undergo pre-shipment inspection (PSI). If there is an issue with L6391DTR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The L6391DTR part is unused and in its original packaging.

Return procedure for L6391DTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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