Tyco TX 75149 manual Paralleled Modules

To analyze a different module, you should select the Module Selection tab at the bottom of the Excel Worksheet to go back to the first page and load the data file for the new module. Note that the new data file will overwrite the old one belonging to the JFW050A. If you want to keep your analysis results for the JFW050A module, you should save SAT_v1.3.xls under a different name, e.g. JFW050A.xls.

Stability Analysis Tool

LS1	RS1
SENSE					Magnitude of the Loop Gain
				40
	Ra1
				20
DC/DC	Ca1	RL
CONVERTER				0
			(dB)
	La1			-20
			Gain
				-40
Please enter the circuit parameters below				-60
Rload = 0.054	ohm			-80
Rs1 = 1	mohm
				100	1000	Frequency (Hz) 10000		100000
Ls1 = 28	nH
Ra1 = 9	mohm
La1 = 0	nH				Phase of the Loop Gain
Ca1 = 10000	∝F			180
Click to Calculate Stability				120
			(deg)	60
Notepad Area for JFW050A Module				0
			Phase
				-60
				-120
				-180
				100	1000		10000	100000
						Frequency (Hz)
				Gain crossover frequency:			229.1 Hz
					Phase Margin:		52.93 degrees

Fig. 7. Stability analysis of the JFW050A for Configuration 2.

Paralleled Modules

Paralleled modules can also be analyzed using SAT. Typically, in systems with paralleled modules, active current sharing is used to distribute the stresses evenly between modules. As described in [1], such a system can be analyzed separately for common-mode stability (which is solely dependent on the number of modules, the characteristics of the modules and the load), and differential-mode stability (which only depends on the current-sharing loop and is independent of the number of modules paralleled or the load). Since differential-mode stability is independent of the load, the manufacturer of the module is able to ensure that the current-sharing loop is stable. However, common-mode stability depends both on the number of modules paralleled and the load, both of which are controlled by the

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