Datasheet UCC33420 (Texas Instruments) - 8

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UCC33420
SLUSFK1E – JANUARY 2024 – REVISED FEBRUARY 2025
www.ti.com 6.7 Safety-Related Certifications VDE UL UL UL
Plan to certify according to DIN EN Plan to certify under UL 1577 / CSA Plan to certify according to IEC Plan to certify according to IEC 60601-1 IEC 60747-17 (VDE 0884-17) Component Recognition program 62368-1 Certificate number: (planned) Certificate number: (planned) File number: (planned) Certificate number: (planned)
6.8 Safety Limiting Values
Safety limiting(1) intends to minimize potential damage to the isolation barrier upon failure of input or output circuitry. A failure of the I/O can allow low resistance to ground or the supply and, without current limiting, dissipate sufficient power to over-heat the die and damage the isolation barrier potentially leading to secondary system failures.
PARAMETER TEST CONDITIONS MAX UNIT
RθJA = 59.7°C/W, VVINP = 5.5V, TJ = 150°C, TA = 817 mA 25°C, POUT = 2.4W IS Safety input, output or supply current RθJA = 59.7°C/W, VVINP = 4.5V, TJ = 150°C, TA = 832 mA 25°C, POUT = 1.65W Safety power dissipation (input power - output PS R power) θJA = 59.7 °C/W, TJ = 150 °C, TA = 25 °C 2.1 W TS Safety temperature 150 °C (1) The maximum safety temperature, TS, has the same value as the maximum junction temperature, TJ, specified for the device. The IS and PS parameters represent the safety current and safety power respectively. The maximum limits of IS and PS should not be exceeded. These limits vary with the ambient temperature, TA. The junction-to-air thermal resistance, RθJA, in the Thermal Information table is that of a device installed on a high-K test board for leaded surface-mount packages. Use these equations to calculate the value for each parameter: TJ = TA + RqJA × P, where P is the power dissipated in the device. TJ(max) = TS = TA + RθJA × PS, where TJ(max) is the maximum allowed junction temperature. PS = IS × VVINP, where VVINP is the maximum input voltage.
6.9 Electrical Characteristics
Over operating temperature range (TJ = –40°C to 150°C), VVINP = 5.0V, CIN1 = COUT1 = 15nF, CIN2 = 10µF, COUT2 = 22µF SEL connected to VCC, VEN/FLT = 5.0V unless otherwise noted. All typical values at VVINP=5.0V, TA = 25°C.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT SUPPLY (Primary-side. All voltages with respect to GNDP)
IVINP_Q VINP quiescent current,disabled EN/FLT=Low, VINP=5.0V, no load 180 uA EN/FLT=High; VINP=4.5V-5.5V; 7 15 mA VCC=5.0V no load IVINP_NL VINP operating current, no load EN/FLT=High; VINP=4.5V-5.5V; 7 15 mA VCC=5.5V no load EN/FLT=High; VINP=5.0V; VCC=5.0V, IVINP_FL VINP operating current, full load 489 508 529 mA Iout=300mA, TA=25°C VINP operating average current under EN/FLT=High; VINP=5.0V; IVINP_SC continuous short circuit operation VCC=0V, TA=25°C (1) 45 mA
UVLOP COMPARATOR (Primary-side. All voltages with respect to GNDP)
VVINP_UV VINP under-voltage lockout rising 2.8 2.9 V LO_R threshold VVINP_UV VINP under-voltage lockout falling 2.6 2.7 V LO_F threshold VUVLO_H VINP under-voltage lockout hysteresis 0.1 V
OVLO COMPARATOR (Primary-side. All voltages with respect to GNDP)
VVINP_OV VINP over-voltage lockout rising threshold 5.77 5.9 V LO_R VVINP_OV VINP over-voltage lockout falling 5.55 5.72 V LO_F threshold VVINP_H VINP over-voltage lockout hysteresis 0.05 V
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8 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