SLUSFP1B April   2025  – November 2025 UCC34141-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Insulation Specifications
    6. 6.6 Electrical Characteristics
    7. 6.7 Safety-Related Certifications
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power Stage Operation
        1. 7.3.1.1 VDD-COM Voltage Regulation
        2. 7.3.1.2 COM-VEE Voltage Regulation
        3. 7.3.1.3 COM-VEE Output Capability
      2. 7.3.2 Output Voltage Soft Start
      3. 7.3.3 ENA and Power-Good
      4. 7.3.4 Protection Functions
        1. 7.3.4.1 Input Undervoltage Lockout
        2. 7.3.4.2 Input Overvoltage Lockout
        3. 7.3.4.3 Output Undervoltage Protection
        4. 7.3.4.4 Output Overvoltage Protection
        5. 7.3.4.5 Over-Temperature Protection
        6. 7.3.4.6 BSW Pin Faults Protection
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 VDD-COM Voltage Regulation
        2. 8.2.2.2 COM-VEE Voltage Regulation and Single Output Configuration
    3. 8.3 System Examples
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Third-Party Products Disclaimer
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Packaging Information
    2. 11.2 Tape and Reel Information
    3. 11.3 Mechanical Data

6.8 Typical Characteristics

As shown in Figure 6-4, Figure 6-5, Figure 6-6, and Figure 6-7, the VDD-COM maximum recommended average power safe operating area (SOA) at each VIN is determined by the lower value of the 3W limit (dotted line) and the corresponding thermal derating curve (solid line) at that input voltage. It is not recommended to operate at an ambient temperatures higher than 125oC. As shown in the Electrical Characteristics table, the typical TSHUT value is 165oC, and minimal TSHUT value is 150oC. The SOA derating curves with TSHUT = 150oC are provided below. The thermal derating power is acquired with the EVM shown in the "Layout" section. The total power requirement in the application can be calculated by the last row of "design requirements"section of the Excel calculator tool, as another design supporting doucment besides this datasheet.

UCC34141-Q1 Efficiency vs. Load on VVDD-COM
VIN = 12V  VVDD-COM = 18V VCOM-VEE = 5V
No Load on VCOM-VEE
Figure 6-1 Efficiency vs. Load on VVDD-COM
UCC34141-Q1 Efficiency vs. Load on VVDD-COM
VIN = 17V  VVDD-COM = 18V VCOM-VEE = 5V
No Load on VCOM-VEE
Figure 6-3 Efficiency vs. Load on VVDD-COM
UCC34141-Q1 SOA Derating Curves for Pre-regulated Input Voltages
VVDD-COM = 18V  VCOM-VEE = 5V No Load on VCOM-VEE
Figure 6-5 SOA Derating Curves for Pre-regulated Input Voltages
UCC34141-Q1 SOA Derating Curves for Pre-regulated Input Voltages
VVDD-COM = 15V  VCOM-VEE = 7V No Load on VCOM-VEE
Figure 6-7 SOA Derating Curves for Pre-regulated Input Voltages
UCC34141-Q1 Efficiency vs. Load on VVDD-COM
VIN = 15V  VVDD-COM = 18V VCOM-VEE = 5V
No Load on VCOM-VEE
Figure 6-2 Efficiency vs. Load on VVDD-COM
UCC34141-Q1 SOA Derating Curves for Pre-regulated Input Voltages
VVDD-COM = 20V  VCOM-VEE = 5V No Load on VCOM-VEE
Figure 6-4 SOA Derating Curves for Pre-regulated Input Voltages
UCC34141-Q1 SOA Derating Curves for Pre-regulated Input Voltages
VVDD-COM = 15V  VCOM-VEE = 4V No Load on VCOM-VEE
Figure 6-6 SOA Derating Curves for Pre-regulated Input Voltages
UCC34141-Q1 SOA Derating Curves with Wide Input Voltage for Direct Battery Connection
VVDD-COM = 18V  VCOM-VEE = 5V No Load on VCOM-VEE
Figure 6-8 SOA Derating Curves with Wide Input Voltage for Direct Battery Connection