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

STMicroelectronics L6385ED

Name: L6385ED
Brand: STMicroelectronics
SKU: L6385ED
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6385ED

Manufacturer:: STMicroelectronics

Category:: Gate Drivers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: L6385ED.pdf

Description:: IC GATE DRVR HALF-BRIDGE 8SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L6385ED from STMicroelectronics is a high-voltage half-bridge gate driver IC designed to control power MOSFETs or IGBTs in asymmetrical topologies. It features independent high-side (600 V rail) and low-side outputs, 400 mA source / 650 mA sink drive capability, 50/30 ns rise/fall times with 1 nF load, and integrated bootstrap diode for compact high-side supply. Used in induction heating inverters and HVAC motor drives.

For engineers reviewing the L6385ED datasheet, L6385ED pinout, L6385ED application, or L6385ED equivalent, key selection criteria include dV/dt immunity (±50 V/ns), dual UVLO (VCC & VBOOT), CMOS/TTL Schmitt inputs with hysteresis, and SO-8 package thermal resistance (150 °C/W).

Technical Context

The L6385ED implements a floating high-side driver architecture using BCD™ "offline" process technology, enabling operation up to 600 V on the VBOOT rail while maintaining logic-level compatibility via Schmitt-trigger inputs. Its internal bootstrap driver replaces external fast-recovery diodes using a synchronized DMOS + series diode structure with 125 Ω typical R_DS(on).

Both output stages feature independent undervoltage lockout (UVLO) with 1.3 V hysteresis on VCC (9.6 V turn-on) and VBOOT (9.5 V turn-on), ensuring robust operation during supply transients. Propagation delays are tightly controlled at 110 ns (turn-on) and 105 ns (turn-off) under 15 V supply and 25 °C conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
High-side voltage rail	Up to 600 V - enables direct interface with 500–600 V DC bus systems in induction heating and motor drives
dV/dt immunity	±50 V/ns across full temperature range - prevents false triggering in noisy high-power switching environments
Output drive current	400 mA source / 650 mA sink - sufficient to rapidly charge/discharge gate capacitance of medium-power MOSFETs (e.g., Q_g ≤ 30 nC)
Switching speed	50 ns rise / 30 ns fall with 1 nF load - supports >400 kHz PWM operation in resonant converters and inverters
UVLO thresholds	VCC: 9.6 V turn-on / 8.3 V turn-off; VBOOT: 9.5 V turn-on / 8.2 V turn-off - ensures stable gate bias before enabling output conduction
Logic input compatibility	CMOS/TTL with hysteresis and internal pull-down - eliminates need for external biasing and improves noise margin in microcontroller-driven systems
Package thermal resistance	R_th(JA) = 150 °C/W (SO-8) - defines maximum continuous power dissipation (750 mW at T_J = 85 °C) under natural convection

Pinout & Package

The L6385ED is available in SO-8 package (ECOPACK® compliant), with 1.27 mm pitch, 5.0 mm × 6.0 mm body, and exposed pad for enhanced thermal performance. Pin 1 is marked by notch or dot; device orientation follows JEDEC MS-012 standard.

Pin/Terminal	Circuit Role	Design Meaning
LIN	Low-side logic input	CMOS/TTL-compatible Schmitt trigger with internal pull-down; controls LVG output in phase
HIN	High-side logic input	CMOS/TTL-compatible Schmitt trigger with internal pull-down; controls HVG output in phase
VCC	Low-side supply	15 V nominal supply for low-side driver and logic; UVLO active below 8.3 V
GND	Power ground reference	Common return for VCC, LIN, HIN, and LVG; must be low-inductance connection to minimize noise coupling
LVG	Low-side gate driver output	Capable of 650 mA sink / 400 mA source; directly drives MOSFET/IGBT gate referenced to GND
OUT	Floating reference node	Connects to source of high-side MOSFET; serves as return path for HVG and bootstrap capacitor charging path
HVG	High-side gate driver output	Capable of 650 mA sink / 400 mA source; drives gate of high-side switch referenced to OUT
VBOOT	Bootstrap supply input	Accepts charged bootstrap capacitor (typically 100 nF); internal DMOS diode charges C_BOOT when LVG is active

Key Features

Feature	Design Value
Integrated bootstrap diode	Replaces external fast-recovery diode with patented DMOS + series diode structure, reducing leakage and PCB area
Dual independent UVLO	Separate monitoring of VCC and VBOOT rails ensures both driver sections remain disabled until both supplies meet threshold
High dV/dt immunity	±50 V/ns tolerance across -45 °C to +125 °C enables reliable operation in high-noise industrial inverters without external filtering
Matched propagation delays	110 ns (ton) / 105 ns (toff) matching minimizes shoot-through risk in half-bridge configurations with tight dead-time control
Phase-aligned outputs	HVG and LVG toggle in phase with HIN and LIN inputs - simplifies control logic for asymmetrical bridge topologies

Applications

Induction Heating Inverter

HVAC Compressor Drive

Use Scenario: Driving asymmetrical half-bridge in 20–50 kHz resonant tank for cooktop or water heater.

IC Role / Device Role / Timing Role: High-side/low-side gate driver with integrated bootstrap, delivering precise timing alignment and high dV/dt immunity.

Use Value: Enables compact, EMI-robust inverter design without external bootstrap diode; supports rapid gate charging for efficient ZVS operation.

Use Scenario: Controlling PMSM compressor in variable-speed HVAC system with 30–120 kHz PWM.

IC Role / Device Role / Timing Role: Half-bridge driver providing matched propagation delays and dual UVLO for safe startup and fault recovery.

Use Value: Ensures reliable gate drive under wide input voltage range (e.g., 300–450 V DC bus) and thermal stress (-40 °C to +105 °C ambient).

Industrial Motor Starter

LED Driver Power Stage

Use Scenario: Soft-start circuit for 3-phase BLDC motor using discrete half-bridge per phase.

IC Role / Device Role / Timing Role: Gate driver with Schmitt-trigger inputs and internal pull-downs for direct MCU interface and noise immunity.

Use Value: Eliminates external input biasing components; supports programmable dead-time insertion via MCU-controlled input sequencing.

Use Scenario: High-efficiency buck-boost LED driver for street lighting with 400 V DC input.

IC Role / Device Role / Timing Role: High-side switch controller in asymmetric topology, leveraging integrated bootstrap for compact layout.

Use Value: Reduces bill-of-materials count and improves reliability over discrete bootstrap solutions in long-life outdoor applications.

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 (600 V), but no integrated bootstrap diode; requires external fast-recovery diode and larger bootstrap capacitor.	Lacks internal UVLO on floating supply; relies on external monitoring or controller-level protection.	Preferred where higher peak current (2 A sink) is required and board space allows external diode placement.
UCC27211D	Lower max V_DD (120 V), no floating high-side section; designed for low-side + high-side bootstrapped dual-output, not true 600 V capable.	Targeted at lower-voltage DC-DC and motor control; unsuitable for 400+ V bus applications.	Only viable for sub-120 V systems; cannot replace L6385ED in induction heating or HVAC mains-connected designs.

Compared with IR2110S and UCC27211D, the L6385ED uniquely combines 600 V high-side capability, integrated bootstrap diode, and dual-rail UVLO in SO-8 - offering superior integration, reduced component count, and enhanced reliability for 400–600 V industrial inverters.

Availability

L6385ED is available at Aetrix Electronics and suitable for induction heating inverters, HVAC compressor drives, and industrial motor starters requiring stable component supply across extended product lifecycles.

Supply support for L6385ED 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, microcontrollers, and automotive-grade ICs.

The L6385ED belongs to ST's high-voltage gate driver product line, engineered specifically for robust, compact half-bridge control in mains-connected appliances and industrial motor systems.

FAQ

What is the maximum recommended switching frequency for L6385ED?

The L6385ED supports up to 400 kHz switching frequency with 1 nF capacitive load, as specified in the recommended operating conditions. At higher frequencies, bootstrap capacitor sizing and thermal management become critical due to increased average current demand and power dissipation in the internal DMOS bootstrap driver.

Can L6385ED drive IGBTs as well as MOSFETs?

Yes - the L6385ED is explicitly qualified to drive both power MOSFETs and IGBTs, with its 650 mA sink/400 mA source capability sufficient for gate charge requirements of devices up to ~50 A rated current. The 50/30 ns switching times assume 1 nF load, aligning with typical IGBT gate capacitance in medium-power modules.

How does the integrated bootstrap diode affect PCB layout?

The integrated bootstrap diode eliminates the need for an external high-voltage fast-recovery diode, reducing component count and minimizing parasitic inductance in the bootstrap charging path. Layout must still ensure low-inductance connection between LVG, OUT, and the bootstrap capacitor, with short traces and solid ground plane beneath the SO-8 package.

Is there a minimum bootstrap capacitor value for reliable operation?

While no absolute minimum is specified, ST recommends C_BOOT ≫ C_EXT, where C_EXT = Q_gate/V_gate. For a typical 30 nC gate charge and 10 V gate drive, C_EXT ≈ 3 nF; a 100 nF C_BOOT limits voltage droop to ~300 mV per cycle. Larger values improve hold-up time during extended high-side conduction.

L6385ED Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

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:: 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:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

L6385ED FAQ

1.How can I place an order for L6385ED through Aetrix?

Please submit a Request for Quotation (RFQ) for L6385ED 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 L6385ED reliable?

The price and inventory of L6385ED are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6385ED is usually 5 days.

3.What payment methods are accepted for L6385ED?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6385ED transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6385ED?

L6385ED orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6385ED 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 L6385ED?

For technical support, including L6385ED datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6385ED requirements.

6.How does Aetrix verify that L6385ED is sourced from the original manufacturer or authorized distributors?

All L6385ED 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 L6385ED meets industry standards.

7.What is the process for return or replacement of L6385ED?

All L6385ED units undergo pre-shipment inspection (PSI). If there is an issue with L6385ED, 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 L6385ED part is unused and in its original packaging.

Return procedure for L6385ED:

1.Submit a request within 90 days.

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

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