SLUUCJ2 July   2021 UCC14240-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Pin Configuration and Functions
  3. 2Description
    1. 2.1 EVM Electrical Performance Specifications
  4. 3Schematic
  5. 4EVM Setup and Operation
    1. 4.1 Reference
    2. 4.2 External Connections for Easy Evaluation
    3. 4.3 Powering the EVM
      1. 4.3.1 Power on for Start-up
      2. 4.3.2 Power off for Shutdown
    4. 4.4 EVM Test Points
    5. 4.5 Oscilloscope Probes: Probing the EVM
  6. 5 Performance Data
    1. 5.1 Efficiency Data
    2. 5.2 Regulation Data
    3. 5.3 Start-up Waveforms
    4. 5.4 Inrush Current
    5. 5.5 AC Ripple Voltage
    6. 5.6 EN and /PG Timing
    7. 5.7 Shutdown
    8. 5.8 Steady State
    9. 5.9 Thermal Performance
  7. 6Assembly and Printed Circuit Board (PCB) Layers
  8. 7Bill of Materials (BOM)
  9. 8Revision History

EVM Electrical Performance Specifications

Table 2-1 EVM Electrical Specifications VIN = 24 V, VDD = 20 V, VEE = 5 V, TA = 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT CHARACTERISTICS
VIN Input voltage range 21 24 27 V
VIN_ON Input voltage on 19 21 V
VIN_OFF Input voltage off 17.1 18.9 V
IIN_FL Input current at full load VIN = 21 V, IVDD = 80 mA 135 mA
VIN = 24 V, IVDD = 80 mA 125
VIN = 27 V, IVDD = 80 mA 113
IIN_NL Input current at no load VIN = 21 V, IVDD =IVEE = 0 mA 11 mA
VIN = 24 V, IVDD =IVEE = 0 mA 10
VIN = 27 V, IVDD =IVEE = 0 mA 10
IIN_OFF Input current at EN LOW EN LOW, VDD = VEE = 0V 460 500 µA
EN to /PG delay IVDD =IVEE = 0 mA 2.8 5 ms
OUTPUT CHARACTERISTICS
VDD DC full load set-point 21 V<VIN<27 V, IVDD = 80 mA 20.154 20.166 V
IVDD VDD load current range 21 V < VIN < 27 V 0 80 mA
VDD Load regulation V D D R E G = V I ( m i n ) - V I ( m a x ) V I ( m a x ) × 100 %

0 mA ≤ IVDD ≤ 80 mA

0.107 %
VDD pk-to-pk AC ripple IVDD = 80 mA 200 250 mV
VDDSS Soft-start IVDD = IVEE = 0 mA 1.8 ms
PMAX Maximum output power IVDD = 100 mA, IVEE = 10 mA 1.5 2 W
VEE DC full load set-point 21 V ≤ VIN ≤ 27 V, IVEE = 10 mA 5.061 5.062 V
IVEE VDD load current range 21 V≤ VIN ≤ 27 V 0 10 mA
VEE pk-to-pk AC ripple IVEE = 10 mA 75 90 mV
SYSTEM CHARACTERISTICS
η Full load efficiency IVDD = 80 mA 59 %
η Half load efficiency IVDD = 40 mA 53 %
FSW Switching frequency 1 VIN = 21 V, 0 mA < IVDD < 80 mA 30 34 MHz
VIN = 24 V, 0 mA < IVDD < 80 mA 20 25
VIN = 27 V, 0 mA < IVDD < 80 mA 10 23
VDD(OCL) VDD overcurrent limit IVDD > 80 mA 135 145 mA
VEE(OCL) VEE overcurrent limit IVEE > 10 mA 13 15 mA
TMAX Maximum temperature rise above ambient IVDD = 80 mA, IVEE = 10 mA 36 40 °C
  1. Switching frequency is measured at VDD, VEE secondary and is 2x primary switching frequency