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UCC21520, UCC21520A 4A, 6A, 5.7kVRMS Isolated Dual-Channel Gate Drivers
SLUSCJ9F
June 2016 – November 2024
UCC21520
PRODUCTION DATA
CONTENTS
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UCC21520, UCC21520A 4A, 6A, 5.7kVRMS Isolated Dual-Channel Gate Drivers
1
1
Features
2
Applications
3
Description
4
Description (continued)
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Power Ratings
6.6
Insulation Specifications
6.7
Safety Limiting Values
6.8
Electrical Characteristics
6.9
Timing Requirements
6.10
Switching Characteristics
6.11
Insulation Characteristics Curves
6.12
Typical Characteristics
7
Parameter Measurement Information
7.1
Propagation Delay and Pulse Width Distortion
7.2
Rising and Falling Time
7.3
Input and Disable Response Time
7.4
Programable Dead Time
7.5
Power-up UVLO Delay to OUTPUT
7.6
CMTI Testing
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
VDD, VCCI, and Undervoltage Lock Out (UVLO)
8.3.2
Input and Output Logic Table
8.3.3
Input Stage
8.3.4
Output Stage
8.3.5
Diode Structure in the UCC21520 and the UCC21520A
8.4
Device Functional Modes
8.4.1
Disable Pin
8.4.2
Programmable Dead-Time (DT) Pin
8.4.2.1
Tying the DT Pin to VCC
8.4.2.2
DT Pin Connected to a Programming Resistor Between DT and GND Pins
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Designing INA/INB Input Filter
9.2.2.2
Select External Bootstrap Diode and its Series Resistor
9.2.2.3
Gate Driver Output Resistor
9.2.2.4
Gate to Source Resistor Selection
9.2.2.5
Estimate Gate Driver Power Loss
9.2.2.6
Estimating Junction Temperature
9.2.2.7
Selecting VCCI, VDDA/B Capacitor
9.2.2.7.1
Selecting a VCCI Capacitor
9.2.2.7.2
Selecting a VDDA (Bootstrap) Capacitor
9.2.2.7.3
Select a VDDB Capacitor
9.2.2.8
Dead Time Setting Guidelines
9.2.2.9
Application Circuits with Output Stage Negative Bias
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Third-Party Products Disclaimer
12.2
Documentation Support
12.2.1
Related Documentation
12.3
Certifications
12.4
Receiving Notification of Documentation Updates
12.5
Support Resources
12.6
Trademarks
12.7
Electrostatic Discharge Caution
12.8
Glossary
13
Revision History
14
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
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Data Sheet
UCC21520, UCC21520A 4A, 6A, 5.7kV
RMS
Isolated Dual-Channel Gate Drivers
1
Features
Junction temperature range –40 to +150°C
Switching parameters:
33ns typical propagation delay
20ns minimum pulse width
6ns maximum pulse-width distortion
Common-mode transient immunity (CMTI) greater than 125V/ns
Surge immunity up to 10kV
4A peak source, 6A peak sink output
3V to 18V input VCCI range to interface with both digital and analog controllers
Up to 25V VDD output drive supply
5V and 8V VDD UVLO options
Programmable overlap and dead time
Fast disable for power sequencing
Safety-related certifications (planned):
8000V
PK
reinforced Isolation per DIN EN IEC 60747-17 (VDE 0884-17)
5.7kV
RMS
isolation for 1 minute per UL 1577
CQC certification per GB4943.1-2022
2
Applications
HEV and BEV battery chargers
Isolated converters in DC-DC and AC-DC power supplies
Server, telecom, it and industrial infrastructures
Motor drive and DC-to-AC solar inverters
LED lighting
Inductive heating
Uninterruptible power supply (UPS)
