Calculation of R1.xlsx

	B	C	D	F	H
1	Calculation of R1
2	The formula and the schematic are taken from an Infineon Application Note. Application Note title: Depletion MOSFETs. Author: Pradeep Kumar Tamma. Document reference: AN_201410_PL11_003. Revision 1.0, 2015-02-03.
3	18 November 2025
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21	VGS(th),V	IDSS,A	ID,A	R1, Ω	PR1,W
22	1,5	0,15	0,001	1377,525513	0,001377525513
23
24	VGS(th),V	IDSS,A	ID,A	R1, Ω	PR1,W
25	2	0,15	0,001	1836,700684	0,001836700684
26
27	VGS(th),V	IDSS,A	ID,A	R1, Ω	PR1,W
28	2,5	0,15	0,001	2295,875855	0,002295875855
29
30	VGS(th),V	IDSS,A	ID,A	R1, Ω	PR1,W
31	3	0,15	0,001	2755,051026	0,002755051026
32
33	VGS(th),V	IDSS,A	ID,A	R1, Ω	PR1,W
34	3,5	0,15	0,001	3214,226197	0,003214226197
35
36	Q1 = DN2540N5-G
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100