Datasheet UCC33420 (Texas Instruments) - 4

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UCC33420
SLUSFK1E – JANUARY 2024 – REVISED FEBRUARY 2025
www.ti.com 5 Pin Configuration and Functions
EN/FLT 1 12 GNDS VINP 2 11 GNDS GNDP 3 10 GNDS GNDP 4 9 GNDS GNDP 5 8 VCC GNDP 6 7 SEL
Figure 5-1. RAQ VSON-FCRLF 12-Pin Package (top view) Table 5-1. Pin Functions PIN TYPE
(1)
DESCRIPTION NAME NO.
Multi-function Enable input pin and fault output pin. Connect to microcontroller through an 18kΩ or greater pull-up resistor. EN/FLT 1 I/O Enable input pin: Forcing EN low disables the device. Pull high to enable normal device functionality. Fault output pin: This pin is pulled low for 200μs to alert that power converter is shutdown due to fault conditions. Primary side input supply voltage pin. 15nF (C VINP 2 P IN1) and 10μF (CIN2) ceramic bypass capacitors placed close to device pins are required between VINP and GNDP pins. 3 4 GNDP G Power ground return connection for VINP. 5 6 VCC selection pin. VCC setpoint is 5.0V when SEL is connected to VCC, and 5.5V when SEL is SEL 7 I shorted to GNDS. Isolated supply output voltage pin. 15nF (C VCC 8 P OUT1) and 22μF (COUT2) ceramic bypass capacitors placed close to device pins are required between VCC and GNDS pins. 9 10 GNDS G Power ground return connection for VCC. 11 12 (1) P = Power, G = Ground, I = Input, O = Output 4 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated Product Folder Links: UCC33420 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Device Comparison 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-Related Certifications 6.8 Safety Limiting Values 6.9 Electrical Characteristics 6.10 Typical Characteristics 7 Detailed Description 7.1 Overview 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Enable and Disable 7.3.2 Output Voltage Soft-Start 7.3.3 Output Voltage Steady-State Regulation 7.3.4 Protection Features 7.3.4.1 Input Under-Voltage and Over-Voltage Lockout 7.3.4.2 Output Under-Voltage Protection 7.3.4.3 Output Over-Voltage Protection 7.3.4.4 Over-Temperature Protection 7.3.4.5 Fault Reporting and Auto-Restart 7.3.5 VCC Load Recommended Operating Area 7.3.6 Electromagnetic Compatibility (EMC) Considerations 7.4 Device Functional Modes 8 Application and Implementation 8.1 Application Information 8.2 Typical Application 8.2.1 Design Requirements 8.2.2 Detailed Design Procedure 8.3 Power Supply Recommendations 8.4 Layout 8.4.1 Layout Guidelines 8.4.2 Layout Example 9 Device and Documentation Support 9.1 Device Support 9.1.1 Third-Party Products Disclaimer 9.2 Documentation Support 9.2.1 Related Documentation 9.3 Receiving Notification of Documentation Updates 9.4 Support Resources 9.5 Trademarks 9.6 Electrostatic Discharge Caution 9.7 Glossary 10 Revision History 11 Mechanical and Packaging Information