Application Notes continued
PT4220/4240 Series
Table 2
DC/DC CONVERTER ADJUSTMENT RESISTOR VALUES
Series Pt #
24V Bus
48V Bus
PT4247
PT4227
PT4246
PT4226
PT4241
PT4221
PT4245
PT4225
PT4242
PT4222
PT4243
PT4223
PT4244
PT4224
Vo(nom)
1.3V
1.5V
1.8V
2.5V
3.3V
5.0V
12.0V
Va(req’d)
1.2
Va(req’d)
4.5
(0.0)kΩ
(340.0)kΩ
(258.0)kΩ
(364.0)kΩ
(541.0)kΩ
(895.0)kΩ
(1960.0)kΩ
1.25
1.3
1.35
1.4
4.6
4.7
4.8
4.9
340.0kΩ
0.0.0kΩ
1.45
1.5
1.55
1.6
1.65
1.7
(9.9)kΩ
5.0
5.1
5.2
5.3
5.4
5.5
578.0kΩ
234.0kΩ
119.0kΩ
62.1kΩ
27.7kΩ
1130.0kΩ
445.0kΩ
216.0kΩ
(23.9)kΩ
1.75
1.8
1.85
1.9
1.95
2.25
2.3
2.35
2.4
(347.0)kΩ
10.8
11.0
11.5
12.0
12.5
13.0
13.2
(399.0)kΩ
(499.0)kΩ
(1110.0)kΩ
1130.0kΩ
445.0kΩ
216.0kΩ
87.8kΩ
18.9kΩ
7.5kΩ
(43.4)kΩ
(115.0)kΩ
(235.0)kΩ
(473.0)kΩ
(1190.0)kΩ
2.45
2.5
2.55
2.6
2.65
2.7
2.75
2.95
3.0
1190.0kΩ
501.0kΩ
272.0kΩ
157.0kΩ
88.4kΩ
(90.0)kΩ
(146.0)kΩ
(223.0)kΩ
(340.0)kΩ
(534.0)kΩ
(923.0)kΩ
(2090.0)kΩ
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
1190.0kΩ
501.0kΩ
272.0kΩ
157.0kΩ
88.4kΩ
42.5kΩ
9.7kΩ
R1 = (Blue)
R2 = Black
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