UCC21520ADWR Isolators

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1. Description

The UCC21520 and the UCC21520ADWR are isolated dual-channel gate drivers 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. 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 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.Each 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 and the UCC21520ADWR enable high efficiency, high power density, and robustness in a wide variety of power applications.

2. Features

    1. Universal: dual low-side, dual high-side or halfbridge driver

    2. Operating temperature range –40 to +125°C

    3. Switching parameters:

         – 19-ns typical propagation delay

         – 10-ns minimum pulse width

         – 5-ns maximum delay matching

         – 5-ns maximum pulse-width distortion

    4. Common-mode transient immunity (CMTI) greater than 100 V/ns

    5. Surge immunity up to 12.8 kV

    6. Isolation barrier life >40 years

    7. 4-A peak source, 6-A peak sink output

    8. TTL and CMOS compatible inputs

    9. 3-V to 18-V input VCCI range to interface with both digital and analog controllers

  10. Up to 25-V VDD output drive supply

        – 5-V and 8-V VDD UVLO options

  11. Programmable overlap and dead time

  12. Rejects input pulses and noise transients shorter than 5 ns

  13. Fast disable for power sequencing

  14. Industry standard wide body SOIC-16 (DW) package

  15. Safety-related certifications:

         – 8000-VPK reinforced Isolation per DIN V VDE V 0884-11:2017-01

         – 5.7-kVRMS 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

3. Applications

    1. HEV and BEV battery chargers

    2. Isolated converters in DC-DC and AC-DC power supplies

    3. Server, telecom, it and industrial infrastructures

    4. Motor drive and DC-to-AC solar inverters

    5. LED lighting

    6. Inductive heating

    7. Uninterruptible power supply (UPS)

4. Pin Configuration and Functions

5. Functional Block Diagram