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UCC21520, Isolated, Dual-Channel Gate Drivers

Texas Instruments offers its UCC21520, 5.7 kVRMS isolated, dual-channel gate drivers that combine both isolation and buffer-drive functions

Image of Texas Instruments' UCC21520, Isolated, Dual-Channel Gate DriversTexas Instruments' UCC21520 is an isolated, dual-channel gate driver with 4 A source and 6 A sink peak current. It is designed to drive power MOSFETs, IGBTs, and SiC MOSFETs up to 5 MHz with best-in-class propagation delay and pulse-width distortion.

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

This 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 when it is set high and allows normal operation when left open or grounded. As a fail-safe measure, primary-side logic failures force both outputs low.

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

With all these advanced features, the UCC21520 enables high efficiency, high power density, and robustness in a wide variety of power applications.

Features
  • Universal: dual low-side, dual high-side or half-bridge driver
  • Operating temperature range of -40 to 125°C
  • Switching parameters:
    • 19 ns typical propagation delay
    • 10 ns minimum pulse width
    • 5 ns maximum delay matching
    • 5 ns maximum pulse-width distortion
  • Common-mode transient immunity (CMTI) greater than 100 V/ns
  • Surge immunity up to 12.8 kV
  • Isolation barrier life >40 years
  • 4 A peak source, 6 A peak sink output
  • TTL and CMOS compatible inputs
  • 3 V to 18 V input VCCI range to interface with both digital and analog controllers
  • Up to 25 VDD output drive supply
    • 5 VDD, 8 VDD, and 12 VDD UVLO options
  • Programmable overlap and dead time 
  • Rejects input pulses and noise transients shorter than 5 ns
  • Fast disable for power sequencing
  • Industry-standard, wide-body SOIC-16 (DW) package 
  • Safety-related and regulatory approvals:
    • 8000 VPK isolation per DIN V VDE V 0884-10 (VDE V0884-10):2006-12 (planned)
    • 5700 VRMS isolation for 1 minute per UL 1577
    • CSA component acceptance notice 5 A, IEC 60950-1 and IEC 60601-1 end equipment standards (planned)
    • CQC certification per GB4943.1-2011 (planned)

UCC21520, Isolated, Dual-Channel Gate Drivers

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
DGTL ISO 5.7KV GATE DRVR 16SOICUCC21520DWDGTL ISO 5.7KV GATE DRVR 16SOIC4 - ImmediateView Details
DGTL ISO 5.7KV GATE DRVR 16SOICUCC21520ADWDGTL ISO 5.7KV GATE DRVR 16SOIC48 - ImmediateView Details
AUTOMOTIVE 4A/6A, 5.7 KVRMS ISOLUCC21520QDWQ1AUTOMOTIVE 4A/6A, 5.7 KVRMS ISOL0View Details

Evaluation Board

ImageManufacturer Part NumberDescriptionPart StatusFunctionEmbeddedAvailable QuantityView Details
EVAL BOARD FOR UCC21520UCC21520EVM-286EVAL BOARD FOR UCC21520ActiveDigital Isolator-8 - ImmediateView Details
Published: 2016-09-15