High voltage high and low-side 2 A gate driver

The L6494 is a high-voltage device manufactured with the BCD6 “offline” technology. It is a single chip half-bridge gate driver for N-channel power MOSFETs or IGBTs.

The high-side (floating) section is designed to stand a DC voltage rail up to 500 V, with 600 V transient withstand voltage. The logic inputs are CMOS/TTL compatible down to 3.3 V for easy interfacing control units such as microcontrollers or DSP.

The device is a single input gate driver with programmable deadtime, and also features an active-low shutdown pin.

Both device outputs can sink 2.5 A and source 2 A, making the L6494 particularly suited for medium and high capacity power MOSFETs\IGBTs.

The independent UVLO protection circuits present on both the lower and upper driving sections prevent the power switches from being operated in low efficiency or dangerous conditions.

The integrated bootstrap diode as well as all of the integrated features of this driver make the application PCB design simpler and more compact, and help reducing the overall bill of material.

Key Features

  • Transient withstand voltage 600 V
  • dV/dt immunity ± 50 V/ns in full temperature range
  • Driver current capability:
    • 2 A source typ. at 25 °C
    • 2.5 A sink typ. at 25 °C
  • Short propagation delay: 85 ns
  • Switching times 25 ns rise/fall with 1 nF load
  • Integrated bootstrap diode
  • Single input and shutdown pin
  • Adjustable deadtime
  • 3.3 V, 5 V TTL/CMOS inputs with hysteresis
  • UVLO on both high-side and low-side sections
  • Compact and simplified layout
  • Bill of material reduction
  • Flexible, easy and fast design

Circuit Diagram



Technical Documentation

Product Specifications
Description Version Size
DS12020 DS12020: High voltage high and low-side 2 A gate driver 2.0 447 KB

Publications and Collaterals

Description Version Size
Brochure Power management guide 09.2017 3 MB

Tools and Software

Evaluation Tools
Solution Evaluation Tools
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Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
L6494LDTR SO-14 Tape And Reel -40 125 Active 0.8357 1000 NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6494LD ActiveSO-14-Ecopack2
L6494LDTR ActiveSO-14-Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.