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

STMicroelectronics L6387E

Name: L6387E
Brand: STMicroelectronics
SKU: L6387E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6387E

Manufacturer:: STMicroelectronics

Category:: Gate Drivers

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: L6387E.pdf

Description:: IC GATE DRVR HALF-BRIDGE 8DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L6387E from STMicroelectronics is a high-voltage half-bridge gate driver IC designed to control power MOSFETs and IGBTs in high-side/low-side configurations. It supports up to 600 V rail voltage, delivers 400 mA source / 650 mA sink output current, achieves 50 ns rise / 30 ns fall times with 1 nF load, and integrates an internal bootstrap diode for compact high-side supply generation. It is used in motor drives for PMDC and PMAC motors.

For engineers reviewing the L6387E datasheet, L6387E pinout, L6387E application, or L6387E equivalent, key selection criteria include dV/dt immunity (±50 V/ns), interlocking logic to prevent shoot-through, CMOS/TTL Schmitt-trigger inputs with hysteresis, UVLO on VCC (6.0 V turn-on threshold), and dual-package availability (DIP-8 and SO-8).

Technical Context

The L6387E implements independent high-side and low-side drivers with floating high-side section referenced to VOUT, enabling operation up to 600 V. Its interlocking logic (per Table 7) ensures HVG and LVG cannot both be high simultaneously, eliminating shoot-through risk without external logic.

It uses BCD™ "offline" technology to integrate a patented bootstrap driver-replacing the external fast-recovery diode with a synchronous DMOS + series diode structure-and provides internal charge pump control. The bootstrap driver exhibits 125 Ω typical R_DS(on), introducing calculable voltage drop during C_BOOT charging.

Key Specifications

Parameter	Value and Actual Design Meaning
Max rail voltage	600 V - enables direct use in 400 V AC line-fed half-bridge topologies without level-shifting
dV/dt immunity	±50 V/ns - prevents false triggering during fast voltage transients across high-side switch
Output drive strength	400 mA source / 650 mA sink - sufficient to rapidly charge/discharge gate capacitance of ≤30 nC MOSFETs at 400 kHz
Propagation delay	110 ns turn-on / 105 ns turn-off - ensures tight timing control in high-frequency motor PWM
VCC UVLO threshold	6.0 V (typ.) turn-on, 5.5 V (typ.) turn-off - protects against erratic operation during brown-out conditions
Bootstrap R_DS(on)	125 Ω (typ.) - determines voltage drop during C_BOOT recharge; e.g., 0.8 V drop for 30 nC gate charge & 5 µs charge time
Input logic compatibility	CMOS/TTL with hysteresis - accepts 3.6 V high / 1.5 V low thresholds, eliminating need for external level shifters

Pinout & Package

The L6387E is available in DIP-8 and SO-8 packages, both 8-pin surface-mount or through-hole options compliant with ECOPACK® environmental standards. Pin functions are identical across packages.

Pin/Terminal	Circuit Role	Design Meaning
LIN	Low-side logic input	CMOS/TTL-compatible signal controlling LVG output; internal pull-down ensures default low state
HIN	High-side logic input	CMOS/TTL-compatible signal controlling HVG output; interlocked with LIN to prevent simultaneous conduction
VCC	Low-side supply	15 V nominal supply for logic and low-side driver; includes UVLO protection (6.0 V turn-on)
GND	Reference ground	Common return for VCC, LIN, and LVG; isolated from high-side floating domain
LVG	Low-side gate driver output	Drives N-channel MOSFET/IGBT gate referenced to GND; 650 mA sink capability ensures fast turn-off
OUT	Floating reference	Connects to source of high-side switch; defines local ground for high-side driver section
HVG	High-side gate driver output	Drives N-channel MOSFET/IGBT gate referenced to OUT; outputs in phase with HIN
VBOOT	Bootstrap supply input	Charged via integrated DMOS diode during LVG ON; supplies high-side driver when OUT rises

Key Features

Feature	Design Value
Integrated bootstrap diode	Replaces external fast-recovery diode, reducing leakage, board area, and component count
Interlocking logic	Hardware-enforced mutual exclusion between HIN and LIN inputs prevents shoot-through under all conditions
High dV/dt immunity	±50 V/ns tolerance over full temperature range (-45 °C to +125 °C) ensures robust operation in noisy industrial environments
Low-side output with bleeder elimination	LVG guarantees ≤0.3 V saturation at 10 mA sink, removing need for external gate-to-source bleed resistor
CMOS/TTL Schmitt inputs	Hysteresis improves noise margin; compatible with microcontroller GPIOs without external conditioning

Applications

Motor Control for HVAC Blower Fans

Induction Heating Half-Bridge Driver

Use Scenario: Driving a 200–400 W single-phase PMSM blower motor in variable-speed HVAC systems using space-vector PWM at 20–40 kHz.

IC Role / Device Role / Timing Role: High- and low-side gate driver providing synchronized, shoot-through-protected switching for IGBT half-bridge with precise dead-time management via interlock.

Use Value: Enables compact, reliable motor control with <105 ns propagation delay and ±50 V/ns noise immunity in electrically noisy duct environments.

Use Scenario: Controlling resonant half-bridge in 20–50 kHz induction cooktops, where rapid switching and high dv/dt stress require robust gate driving.

IC Role / Device Role / Timing Role: Floating high-side driver delivering 650 mA sink current to rapidly discharge IGBT gates during zero-voltage switching transitions.

Use Value: Integrated bootstrap diode eliminates external diode leakage, improving thermal stability and efficiency at high ambient temperatures (>85 °C).

Industrial PMAC Motor Drive

Home Appliance Washing Machine Inverter

Use Scenario: Power stage driver in 3-phase inverter for permanent magnet AC motors in CNC spindles and servo axes.

IC Role / Device Role / Timing Role: One L6387E per half-bridge leg, providing matched propagation delays (110/105 ns) and tight timing alignment across phases.

Use Value: Dual-package option (SO-8/DIP-8) supports both automated SMT assembly and manual prototyping with identical electrical behavior.

Use Scenario: Driving 300–600 W BLDC motor in washing machine drum drive, operating with field-oriented control and frequent start-stop cycles.

IC Role / Device Role / Timing Role: Gate driver ensuring safe commutation sequencing via hardware interlock, preventing DC bus short-circuits during direction reversal.

Use Value: VCC UVLO (6.0 V) and junction temperature rating (150 °C) ensure fail-safe shutdown during voltage sags or thermal overload events.

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
IR2110S	Higher V_BS rating (625 V), no integrated bootstrap diode, 2.5 µs undervoltage lockout delay vs. L6387E's instantaneous response	Requires external bootstrap diode and larger C_BOOT; better suited for ultra-high-reliability industrial UPS where external diode selection is preferred	Select IR2110S only if external diode integration is undesirable and higher V_BS margin is critical
UCC27211D	600 V rating, 4 A peak output, no interlock logic, separate high/low enable pins, no bootstrap diode	Demands external shoot-through protection logic; optimized for high-current GaN FETs rather than cost-sensitive IGBTs	Choose UCC27211D for high-speed GaN designs requiring >2 A drive, not for IGBT-based appliance motor control

Compared with IR2110S and UCC27211D, the L6387E uniquely combines integrated bootstrap diode, hardware interlock, and TTL/CMOS input compatibility in a cost-optimized 8-pin package-making it optimal for volume consumer and industrial motor drives where board space and BOM count are constrained.

Availability

L6387E is available at Aetrix Electronics and suitable for home appliance motor control, HVAC blower systems, and induction heating applications requiring stable component supply across multi-year production cycles.

Supply support for L6387E 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, specializing in power management, analog, MEMS, and microcontrollers for industrial, automotive, and consumer markets.

The L6387E belongs to ST's high-voltage gate driver product line, engineered specifically for cost-sensitive, high-reliability half-bridge motor and power supply applications in appliances and factory automation.

FAQ

What is the purpose of the interlocking function in the L6387E?

The interlocking function is a hardware-level logic circuit that prevents both HVG and LVG outputs from being high simultaneously. When both HIN and LIN inputs are high, the outputs go low-ensuring shoot-through protection regardless of controller timing errors or software faults. This eliminates reliance on precise MCU-generated dead-time and enhances system safety in motor drives.

Can the L6387E drive IGBTs rated above 600 V?

No. The absolute maximum floating supply voltage (V_BOOT) is 618 V, and the maximum output voltage (V_OUT) is limited to 580 V under recommended operating conditions. Exceeding 600 V rail violates the device's safe operating area and risks latch-up or catastrophic failure. For >600 V systems, a level-shifted driver or higher-rated alternative is required.

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

The integrated bootstrap diode removes the need for an external high-voltage fast-recovery diode and its associated footprint, routing, and thermal pad. This simplifies layout by eliminating high-di/dt loop inductance from the external diode path and reduces parasitic ringing. Layout must still minimize C_BOOT-to-V_BOOT trace inductance and place C_BOOT close to V_BOOT/OUT pins.

Is the L6387E suitable for 3-phase inverter designs?

Yes-each L6387E drives one half-bridge leg, so three devices are used for a standard 3-phase inverter. Its matched propagation delays (110 ns turn-on / 105 ns turn-off), identical thermal characteristics in SO-8/DIP-8, and interlock logic ensure consistent phase timing and fault resilience. It is widely deployed in 3-phase BLDC and PMSM drives for appliances and industrial pumps.

L6387E Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Driven Configuration:: Half-Bridge

Channel Type:: Independent

Number of Drivers:: 2

Gate Type:: IGBT, N-Channel MOSFET

Voltage - Supply:: 17V (Max)

Logic Voltage - VIL, VIH:: 1.5V, 3.6V

Current - Peak Output (Source, Sink):: 400mA, 650mA

Input Type:: Inverting

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

Rise / Fall Time (Typ):: 50ns, 30ns

Operating Temperature:: -45°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 8-DIP

L6387E FAQ

1.How can I place an order for L6387E through Aetrix?

Please submit a Request for Quotation (RFQ) for L6387E 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 L6387E reliable?

The price and inventory of L6387E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6387E is usually 5 days.

3.What payment methods are accepted for L6387E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6387E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6387E?

L6387E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6387E 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 L6387E?

For technical support, including L6387E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6387E requirements.

6.How does Aetrix verify that L6387E is sourced from the original manufacturer or authorized distributors?

All L6387E 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 L6387E meets industry standards.

7.What is the process for return or replacement of L6387E?

All L6387E units undergo pre-shipment inspection (PSI). If there is an issue with L6387E, 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 L6387E part is unused and in its original packaging.

Return procedure for L6387E:

1.Submit a request within 90 days.

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

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