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UCC25640x LLC Resonant Controller with Ultra-Low Audible Noise and Standby Power
SLUSD90E
June 2019 – February 2021
UCC256402
,
UCC256403
,
UCC256404
PRODUCTION DATA
CONTENTS
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UCC25640x LLC Resonant Controller with Ultra-Low Audible Noise and Standby Power
1
Features
2
Applications
3
Description
4
Revision History
Device Comparison Table
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Switching Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Hybrid Hysteretic Control
7.3.2
Regulated 13-V Supply
7.3.3
Feedback Chain
7.3.3.1
Optocoupler Feedback Signal Input and Bias
7.3.3.2
FB Pin Voltage Clamp
7.3.3.3
"Pick Lower Value" Block and Soft Start Multiplexer
7.3.3.4
Pick Higher Block and Burst Mode Multiplexer
7.3.3.5
VCR Comparators
7.3.4
Resonant Capacitor Voltage Sensing
7.3.5
Resonant Current Sensing
7.3.6
Bulk Voltage Sensing
7.3.7
Output Voltage Sensing
7.3.8
High Voltage Gate Driver
7.3.8.1
Adaptive Dead Time Control
7.3.9
Protections
7.3.9.1
ZCS Region Prevention
7.3.9.2
Over Current Protection (OCP)
7.3.9.3
Bias Winding Over Voltage Protection (BWOVP)
7.3.9.4
Input Under Voltage Protection (VINUVP)
7.3.9.5
Input Over Voltage Protection (VINOVP)
7.3.9.6
Boot UVLO
7.3.9.7
RVCC UVLO
7.3.9.8
Over Temperature Protection (OTP)
7.4
Device Functional Modes
7.4.1
High Voltage Start-Up
7.4.2
X-Capacitor Discharge
7.4.3
Burst Mode Control
7.4.3.1
Soft-Start and Burst-Mode Threshold
7.4.3.2
BMTL/BMTH Ratio Programming
7.4.4
System State Machine
8
Power Supply Recommendations
8.1
VCC Pin Capacitor
8.2
Boot Capacitor
8.3
RVCC Pin Capacitor
9
Layout
9.1
Layout Guidelines
9.2
Layout Example
10
Device and Documentation Support
10.1
Documentation Support
10.1.1
Related Documentation
10.2
Related Links
10.3
Receiving Notification of Documentation Updates
10.4
Community Resources
10.5
Trademarks
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DDB|14
MPDC008
Thermal pad, mechanical data (Package|Pins)
Orderable Information
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