Isolated dual channel gate driver

30th August 2018
Posted By : Alex Lynn
Isolated dual channel gate driver

 

The UCC21520-Q1 from Texas Instruments, is an isolated dual-channel gate drivers with 4A source and 6A sink peak current. It is designed to drive power MOSFETs, IGBTs, and SiC MOSFETs up to 5MHz with best-in-class propagation delay and pulse-width distortion.

The input side is isolated from the two output drivers by a 5.7kVRMS reinforced isolation barrier, with a minimum of 100V/ns common-mode transient immunity (CMTI). Internal functional isolation between the two secondary-side drivers allows a working voltage of up to 1500VDC.

Every driver can be configured as two low-side drivers, two high-side drivers, or a half-bridge driver with programmable dead time (DT). A disable pin shuts down both outputs simultaneously, and allows normal operation when left open or grounded. As a fail-safe measure, primary-side logic failures force both outputs low.

Each device accepts VDD supply voltages up to 25V. A wide input VCCI range from 3 to 18V makes the driver suitable for interfacing with both analog and digital controllers. All supply voltage pins have under voltage lock-out (UVLO) protection.

With all these advanced features, the UCC21520-Q1 enables high efficiency, high power density, and robustness.

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C6
  • Universal: Dual Low-Side, Dual High-Side or Half-Bridge Driver
  • Operating Temperature Range -40 to +125°C
  • Switching Parameters:
    • 19ns Typical Propagation Delay
    • 10ns Minimum Pulse Width
    • 5ns Maximum Delay Matching
    • 6ns Maximum Pulse-Width Distortion
  • Common-Mode Transient Immunity (CMTI) Greater than 100V/ns
  • Surge Immunity up to 12.8kV
  • Isolation Barrier Life more than 40 Years
  • 4A Peak Source, 6-A Peak Sink Output
  • TTL and CMOS Compatible Inputs
  • 3 to 18V Input VCCI Range to Interface with Both Digital and Analog Controllers
  • Up to 25V VDD Output Drive Supply
    • 5 and 8V VDD UVLO Options
  • Programmable Overlap and Dead Time
  • Rejects Input Pulses and Noise Transients Shorter than 5 ns
  • Fast Disable for Power Sequencing
  • Safety-Related Certifications:
    • 8000VPK Reinforced Isolation per DIN V VDE V 0884-11:2017-01
    • 5.7kVRMS Isolation for 1 Minute per UL 1577
    • CSA Certification per IEC 60950-1, IEC 62368-1, IEC 61010-1 and IEC 60601-1 End Equipment Standards
    • CQC Certification per GB4943.1-2011

To find out more, click here.


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