TIDT421 November   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Suggested Equipment
    3. 1.3 General Texas Instruments High Voltage Evaluation (TI HV EMV) User Safety Guidelines
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Power Factor (PF) and Input Current Total Harmonic Distortion (iTHD)
    3. 2.3 Efficiency, PF, and THD Data
    4. 2.4 Standby Power
    5. 2.5 Thermals
    6. 2.6 Bode Plots
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-Up Sequence

2.5 Thermals

Thermal images are shown in Figure 2-5.

PMP23454 TA = 25.0°C, 115V, 60Hz Input, Full Load, Top of PCBFigure 2-5 TA = 25.0°C, 115V, 60Hz Input, Full Load, Top of PCB
Table 2-3 Component Temperature, 115V, 60Hz Input, Full Load, Top of PCB
COMPONENTTEMPERATURE (°C)

L1 PFC Inductor

34.4

Q13,

D8 PFC MOSFET & Diode

53.8

Q4, Q5 LLC MOSFETs

46.1

T1 LLC Transformer

78.3

PMP23454 TA = 25.0°C, 230V, 50Hz Input, Full Load, Bottom of PCBFigure 2-6 TA = 25.0°C, 230V, 50Hz Input, Full Load, Bottom of PCB
Table 2-4 Component Temperature, 115V, 60Hz Input, Full Load, Bottom of PCB
COMPONENTTEMPERATURE (°C)
Q1, Q2, Q3, Q9, Q10, Q11 SR MOSFETs

65.8

U1, U3

SR Controllers

70

R59 PFC Current Sense Resistor

50.3

R10, R12, R13 Output Current Sense Resistors

52.6

U7 PFC Controller

37.4

U4 LLC Controller

34.6

Q15 NTC Shorting MOSFET

35.4

PMP23454 TA = 25.0°C, 230V, 50Hz Input, Full Load, Top of PCBFigure 2-7 TA = 25.0°C, 230V, 50Hz Input, Full Load, Top of PCB
Table 2-5 Component Temperature, 230V, 50Hz Input, Full Load, Top of PCB
COMPONENTTEMPERATURE (°C)

L1 PFC Inductor

32.0

Q13,

D8 PFC MOSFET & Diode

41.0

Q4, Q5 LLC MOSFETs

43.7

T1 LLC Transformer

77.6

PMP23454 TA = 25.0°C, 230V, 50Hz Input, Full Load, Bottom of PCBFigure 2-8 TA = 25.0°C, 230V, 50Hz Input, Full Load, Bottom of PCB
Table 2-6 Component Temperature, 230V, 50Hz Input, Full Load, Bottom of PCB
COMPONENTTEMPERATURE (°C)
Q1, Q2, Q3, Q9, Q10, Q11 SR MOSFETs

64.9

U1, U3

SR Controllers

68.7

R59 PFC Current Sense Resistor

34.5

R10, R12, R13 Output Current Sense Resistors

52.2

U7 PFC Controller

34.7

U4 LLC Controller

34.0

Q15 NTC Shorting MOSFET

30.5