SLTS092B Datasheet, PDF (6/9 Pages) Texas Instruments – 20-W 48-V Input Isolated DC/DC Converter

Application Notes continued
PT4120/4140 Series
Table 2
DC/DC CONVERTER SERIES ADJUSTMENT RESISTOR VALUES
Series Pt #
48V Bus
PT4126
PT4127
PT4128
24V Bus
PT4146
PT4147
PT4148
Vo(nom)
Va(req’d)
1.5Vdc
1.8Vdc
2.5Vdc
1.35
(2.8)kΩ
1.4
(53.2)kΩ
1.45
(204.0)kΩ
1.5
1.55
1.3MΩ
1.6
627.0kΩ
1.65
404.0kΩ
(51.7)kΩ
1.7
(161.0)kΩ
1.75
(489.0)kΩ
1.8
1.85
1.28MΩ
1.9
587.0kΩ
1.95
355.0kΩ
2.25
(26.5)kΩ
2.3
(92.9)kΩ
2.35
(203.0)kΩ
2.4
(425.0)kΩ
2.45
(1.09)MΩ
2.5
2.55
1.09MΩ
2.6
450.0kΩ
2.65
237.0kΩ
2.7
131.0kΩ
2.75
67.7kΩ
2.95
3.0
3.05
3.1
3.15
3.2
3.25
3.3
3.35
3.4
3.45
3.5
3.55
3.6
3.65
R₁ = (Blue)
R₂ = Black
PT4121
PT4141
3.3Vdc
(90.7)kΩ
(146.0)kΩ
(224.0)kΩ
(341.0)kΩ
(536.0)kΩ
(926.0)kΩ
(2.09)MΩ
1.19MΩ
502.0kΩ
272.0kΩ
158.0kΩ
88.7kΩ
42.7kΩ
9.9kΩ
Va(req’d)
4.5
4.55
4.6
4.65
4.7
4.75
4.8
4.85
4.9
4.95
5.0
5.05
5.1
5.15
5.2
5.25
5.3
5.35
5.4
5.45
5.5
PT4122
PT4142
5.0Vdc
(12.6)kΩ
(40.3)kΩ
(75.0)kΩ
(120.0)kΩ
(179.0)kΩ
(262.0)kΩ
(387.0)kΩ
(595.0)kΩ
(1.01)MΩ
1.06MΩ
645.0kΩ
437.0kΩ
312.0kΩ
229.0kΩ
169.0kΩ
125.0kΩ
90.2kΩ
62.4kΩ
Va(req’d)
10.8
11.0
11.2
11.4
11.6
11.8
12.0
12.2
12.4
12.6
12.8
13.0
13.2
13.5
13.6
13.8
14.0
14.2
14.4
14.6
14.8
15.0
15.2
15.4
15.6
15.8
16.0
16.5
PT4123
PT4143
12.0Vdc
(276.0)kΩ
(365.0)kΩ
(497.0)kΩ
(719.0)kΩ
(1.16)MΩ
588.0kΩ
239.0kΩ
123.0kΩ
64.6kΩ
29.7kΩ
6.4kΩ
PT4124
PT4144
15.0Vdc
(312.0)kΩ
(345.0)kΩ
(427.0)kΩ
(542.0)kΩ
(713.0)kΩ
(1.0)MΩ
(1.57)MΩ
597.0kΩ
253.0kΩ
138.0kΩ
81.0kΩ
46.6kΩ
0.8kΩ
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