TIDT286
June 2022
Description
Features
Applications
1
Test Prerequisites
1.1
Voltage and Current Requirements
1.2
Considerations
1.3
Dimensions
2
Testing and Results
2.1
Efficiency Graph
2.2
Loss Graph
2.3
Load Regulation
2.4
Line Regulation
2.5
Thermal Images
2.5.1
0.5-A Output Current
2.5.2
1-A Output Current
2.5.3
1.5-A Output Current
2.5.4
2-A Output Current
2.5.5
Pulsed Ouput Current
2.6
Bode Plots
2.6.1
6-V Input Voltage
2.6.2
12-V Input Voltage
3
Waveforms
3.1
Switching
3.1.1
Transistor Q1
3.1.1.1
Drain - Source
3.1.1.2
Gate - Source
3.1.2
Diode D3
3.2
Input Voltage Ripple
3.2.1
20-MHz Bandwidth
3.2.2
Full Bandwidth
3.3
Output Voltage Ripple
3.4
Load Transients
3.4.1
Switching Load From 1 A to 2 A
3.4.2
Switching Load From 0.2 A to 2 A
3.4.2.1
50% Duty Cycle
3.4.2.2
Low Duty Cycle (TON = 3 ms; TOFF = 30 ms)
3.5
Start-Up Sequence
3.6
Shutdown Sequence
2.6
Bode Plots
Note:
Bode plot measurement with the network analyzer (NWA) is just a small signal analysis in frequency domain, while
transient measurement
is large signal analysis in the time domain.
Table 2-2 Summery of the Bode Plots
6 V
IN
12 V
IN
Bandwidth (kHz)
6.56
12.2
Phase margin
74°
76°
Slope (20 dB / decade)
–0.97
–1.06
Gain Margin (dB)
–18.1
–28.4
Slope (20 dB / decade)
–1.13
–0.19
Freq (kHz)
45
202