Table of Contents

1 Features............................................................................1

2 Applications..................................................................... 1

3 Description.......................................................................1

4 Revision History.............................................................. 2

5 Device Comparison Table...............................................2

6 Pin Configuration and Functions...................................3

UCC21540-Q1 Pin Functions........................................... 3

7 Specifications.................................................................. 4

7.1 Absolute Maximum Ratings........................................ 4

7.2 ESD Ratings............................................................... 4

7.3 Recommended Operating Conditions.........................4

7.4 Thermal Information....................................................5

7.5 Power Ratings.............................................................5

7.6 Insulation Specifications............................................. 5

7.7 Safety-Related Certifications...................................... 6

7.8 Safety-Limiting Values................................................ 6

7.9 Electrical Characteristics.............................................7

7.10 Switching Characteristics..........................................8

7.11 Insulation Characteristics Curves..............................9

7.12 Typical Characteristics............................................ 10

8 Parameter Measurement Information.......................... 15

8.1 Minimum Pulses........................................................15

8.2 Propagation Delay and Pulse Width Distortion......... 15

8.3 Rising and Falling Time.............................................15

8.4 Input and Disable Response Time............................16

8.5 Programmable Dead Time........................................16

8.6 Power-up UVLO Delay to OUTPUT..........................17

8.7 CMTI Testing.............................................................18

9 Detailed Description......................................................19

9.1 Overview................................................................... 19

9.2 Functional Block Diagram......................................... 19

9.3 Feature Description...................................................20

9.4 Device Functional Modes..........................................23

10 Application and Implementation................................ 25

10.1 Application Information........................................... 25

10.2 Typical Application.................................................. 25

11 Power Supply Recommendations..............................35

12 Layout...........................................................................36

12.1 Layout Guidelines................................................... 36

12.2 Layout Example...................................................... 37

13 Device and Documentation Support..........................39

13.1 Documentation Support.......................................... 39

13.2 Receiving Notification of Documentation Updates..39

13.3 Support Resources................................................. 39

13.4 Trademarks.............................................................39

13.5 Electrostatic Discharge Caution..............................39

13.6 Glossary..................................................................39

14 Mechanical, Packaging, and Orderable

Information.................................................................... 39

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision B (February 2021) to Revision C (February 2021)

Page

• Updated Reinforced Isolation Capcitor Life Time Projection Figure .................................................................. 9

Changes from Revision A (July 2020) to Revision B (February 2021)

Page

• Added functional safety quality-managed to features list................................................................................... 1

• Changed Features, Applications, and Description sections............................................................................... 1

• Added initial release of UCC21540A-Q1 device.................................................................................................1

• Added UCC21540A-Q1 UVLO thresholds .........................................................................................................7

• Added UCC21540A-Q1 UVLO threshold plots................................................................................................. 10

Changes from Revision * (May 2020) to Revision A (July 2020)

Page

• Changed marketing status from Advance Information to initial release. ............................................................1

5 Device Comparison Table

DEVICE OPTIONS

UVLO

PEAK CURRENT

PACKAGE

UCC21540QDWKQ1

8.0-V

4-A Source, 6-A Sink

SOIC-14

UCC21540AQDWKQ1

5.0-V

4-A Source, 6-A Sink

SOIC-14

UCC21540-Q1

SLUSDO2C – JUNE 2020 – REVISED FEBRUARY 2021

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