Datasheet UCC34141-Q1 (Texas Instruments) - 10

UCC34141-Q1
SLUSFP1D – APRIL 2024 – REVISED APRIL 2026
www.ti.com 6.6 Electrical Characteristics (continued)
Over operating temperature range (TJ = –40°C to 150°C), unless otherwise noted. All typical values at TA = 25°C and VVIN = 12V. External BOM components are listed in the pin description table.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
(VDD – COM) under-voltage VVDD_UVP_R protection rising threshold, VUVP = At FBVDD 2.175 2.25 2.35 V VREF × 90% (VDD – COM) under-voltage VVDD_UVP_HYST At FBVDD 22 mV protection hysteresis
(VDD-COM) OVP, OVER-VOLTAGE PROTECTION COMPARATOR (Secondary-side)
(VDD – COM) over-voltage protection VVDD_OVP_R At FBVDD 2.7 2.75 2.825 V rising threshold, VOVP = VREF ×110% (VDD – COM) over-voltage protection VVDD_OVP_HYST At FBVDD 23 mV hysteresis
(COM-VEE) Buck-Boost Converter (Secondary Side)
COM-VEE=2V, with 1% feedback -9.5 9.5 % resistance accuracy COM-VEE=3V, 4V, 5V, with 1% VVEE_REG (COM-VEE) regulation accuracy -4.5 4.5 % feedback resistance accuracy COM-VEE=6V, 7V, 8V, with 1% -6.5 6.5 % feedback resistance accuracy (COM-VEE) over-voltage lockout rising VVEE_OVLOS_R Voltage from COM to VEE, rising 8.8 9 9.2 V threshold (COM-VEE) over-voltage lockout VVEE_OVLOS_F Voltage from COM to VEE, falling 8.4 8.6 8.8 V falling threshold VDD-COM=18V, COM-VEE=4V, 3.3uH fSW_VEE Switching frequency of VEE converter 3.2 MHz external inductor Buck boost inductor current limit, out ILIM Max current limit across conditions 0.235 0.261 0.287 A of BSW pin Buck boost inductor current limit, out ILIM VDD-COM=6V. 0.199 0.221 0.243 A of BSW pin Buck boost inductor current limit, out ILIM VDD-COM=18V 0.127 0.141 0.155 A of BSW pin Buck boost inductor current limit, out ILIM VDD-COM=25V 0.085 0.094 0.104 A of BSW pin Timeout threshold to determine if the tVEE_SSTO 4.6 6.3 8 ms VEE soft start is succesful
(COM-VEE) UVP, UNDER -VOLTAGE PROTECTION COMPARATOR (Secondary-side)
COM-VEE=2V 83 % (COM – VEE) under-voltage protection VVEE_UVP_F COM-VEE=5V 90 % falling threshold COM-VEE=8V 92 % (COM – VEE) under-voltage protection VVEE_UVP_HYST COM-VEE=5V 85 mV hysteresis
(COM-VEE) OVP, OVER-VOLTAGE PROTECTION COMPARATOR (Secondary-side)
COM-VEE=2V 117 % (COM – VEE) over-voltage protection VVEE_OVP_R COM-VEE=5V 110 % rising threshold COM-VEE=8V 108 % (COM – VEE) over-voltage protection VVEE_OVP_HYST COM-VEE=5V 84 mV hysteresis
TSHUTS THERMAL SHUTDOWN COMPARATOR (Secondary-side)
Secondary -side over-temperature TSHUT_S_R 150 165 °C shutdown rising threshold 10 Submit Document Feedback Copyright © 2026 Texas Instruments Incorporated Product Folder Links: UCC34141-Q1 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 Insulation Specifications 6.6 Electrical Characteristics 6.7 Safety Limiting Values 6.8 Typical Characteristics 7 Detailed Description 7.1 Overview 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Power Stage Operation 7.3.1.1 VDD-COM Voltage Regulation 7.3.1.2 COM-VEE Voltage Regulation 7.3.1.3 COM-VEE Output Capability 7.3.2 Output Voltage Soft Start 7.3.3 ENA and Power-Good 7.3.4 Protection Functions 7.3.4.1 Input Undervoltage Lockout 7.3.4.2 Input Overvoltage Lockout 7.3.4.3 Output Undervoltage Protection 7.3.4.4 Output Overvoltage Protection 7.3.4.5 Output Short Circuit Protection 7.3.4.6 Over-Temperature Protection 7.3.4.7 BSW Pin Faults Protection 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 8.2.2.1 VDD-COM Voltage Regulation 8.2.2.2 COM-VEE Voltage Regulation and Single Output Configuration 8.3 System Examples 8.4 Power Supply Recommendations 8.5 Layout 8.5.1 Layout Guidelines 8.5.2 Layout Example 9 Device and Documentation Support 9.1 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, Packaging, and Orderable Information