SNVU872A September   2023  – March 2024 LM70880-Q1

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Test Setup and Procedure
      1. 2.1.1 EVM Connections
      2. 2.1.2 Test Equipment
      3. 2.1.3 Recommended Test Setup
        1. 2.1.3.1 Input Connections
        2. 2.1.3.2 Output Connections
      4. 2.1.4 Test Procedure
        1. 2.1.4.1 Line and Load Regulation, Efficiency
  8. 3Implementation Results
    1. 3.1 Performance Data and Results
      1. 3.1.1 EVM Characteristics
      2. 3.1.2 Conversion Efficiency
      3. 3.1.3 Operating Waveforms
        1. 3.1.3.1 Switching
        2. 3.1.3.2 Load Transient Response
        3. 3.1.3.3 Line Transient Response
        4. 3.1.3.4 Start-Up and Shutdown With EN
        5. 3.1.3.5 Start-Up with VIN
      4. 3.1.4 Bode Plot
      5. 3.1.5 CISPR 25 EMI Performance
      6. 3.1.6 Thermal Performance
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
      1. 4.2.1 Component Drawings
      2. 4.2.2 Multi-Layer Stackup
    3. 4.3 Bill of Materials
  10. 5Compliance Information
    1. 5.1 Compliance and Certifications
  11. 6Related Documentation
    1. 6.1 Supplemental Content
      1. 6.1.1 Development Support
      2. 6.1.2 PCB Layout Resources
      3. 6.1.3 Thermal Design Resources
  12. 7Additional Information
    1. 7.1 Trademarks
  13. 8Revision History

3.1.1 EVM Characteristics

Table 4-1 lists the electrical characteristics.

Table 3-1 Electrical Performance Characteristics
Parameter Test Conditions MIN TYP MAX Unit
INPUT CHARACTERISTICS
Input voltage range, VIN Operating 8 48 72 V
Input current, no load, IIN-NL IOUT = 0A, PFM tied to VDDA, UVLO removed VIN = 24V 37.5 µA
VIN = 48V 35.4
VIN = 72V 35.5
Input current, shutdown, IIN-OFF VEN = 0V VIN = 48V 5.5 µA
OUTPUT CHARACTERISTICS
Output voltage, VOUT(1) 4.95 5 5.05 V
Output current, IOUT VIN = 8V to 72V, Airflow = 100 LFM(2) 0 8 A
Output voltage regulation, ΔVOUT Load regulation IOUT = 0A to 8A 0.1%
Line regulation VIN = 8V to 72V 1%
Output voltage ripple, VOUT-AC VIN = 48V, IOUT = 8A 10 mVrms
Output overcurrent protection, IOCP VIN = 48V 10 A
Soft-start time, tSS 3 ms
SYSTEM CHARACTERISTICS
Switching frequency, FSW-nom VIN = 48V 400 kHz
PFM Light-load efficiency, ηLIGHT(1) IOUT = 1A VIN = 24V 89.9%
VIN = 48V 83.2%
VIN = 60V 80.6%
Half-load efficiency, ηHALF IOUT = 4A VIN = 24V 93.6%
VIN = 48V 89.9%
VIN = 60V 88.2%
Full load efficiency, ηFULL IOUT = 8A VIN = 24V 92.5%
VIN = 48V 90.5%
VIN = 60V 89.4%
LM70880-Q1 junction temperature, TJ –40 150 °C
(1) The default output voltage of this EVM is 12V. Efficiency and other performance metrics can change based on operating input voltage, load currents, externally-connected output capacitors, and other parameters.
(2) The recommended airflow when operating at input voltages greater than 60V is 100 LFM.