PT6644 Datasheet, PDF (4/6 Pages) Texas Instruments – 24W 12V Input Positive to Negative Voltage Converter

Application Notes continued
PT6640 Series
Table 2
PT6640 ADJUSTMENT RESISTOR VALUES
Series Pt #
PT6646
PT6641
Current
4Adc
4Adc
Vo (nom)
V_a (req’d)
–2.5Vdc
–3.3Vdc
–1.8
(1.4)kΩ
–1.9
(2.9)kΩ
–2.0
(5.0)kΩ
–2.1
(8.1)kΩ
–2.2
(13.3)kΩ
(1.0)kΩ
–2.3
(23.7)kΩ
(2.3)kΩ
–2.4
(54.9)kΩ
(3.9)kΩ
–2.5
(5.8)kΩ
–2.6
59.9kΩ
(8.4)kΩ
–2.7
28.7kΩ
(11.7)kΩ
–2.8
18.3kΩ
(16.5)kΩ
–2.9
13.1kΩ
(23.6)kΩ
–3.0
10.0kΩ
(35.4)kΩ
–3.1
7.9kΩ
(59.0)kΩ
–3.2
6.4kΩ
(130.0)kΩ
–3.3
5.3kΩ
–3.4
4.4kΩ
81.5kΩ
–3.5
3.8kΩ
38.3kΩ
–3.6
3.2kΩ
23.8kΩ
–3.7
2.7kΩ
16.6kΩ
–3.8
2.3kΩ
12.3kΩ
–3.9
2.0kΩ
9.4kΩ
–4.0
1.7kΩ
7.4kΩ
–4.1
1.4kΩ
5.8kΩ
–4.2
1.2kΩ
4.6kΩ
–4.3
1.0kΩ
3.7kΩ
–4.4
2.9kΩ
–4.5
2.2kΩ
–4.6
1.7kΩ
–4.7
1.2kΩ
–4.8
–4.9
–5.0
–5.1
–5.2
–5.3
–5.4
–5.5
–5.6
–5.7
–5.8
–5.9
–6.0
–6.1
–6.2
–6.3
–6.4
–6.5
R1 = (Blue) R2 = Black
PT6642
4Adc
–5.0Vdc
(1.6)kΩ
(2.3)kΩ
(3.1)kΩ
(4.0)kΩ
(5.1)kΩ
(6.2)kΩ
(7.6)kΩ
(9.1)kΩ
(10.9)kΩ
(13.0)kΩ
(15.6)kΩ
(18.7)kΩ
(22.6)kΩ
(27.6)kΩ
(34.2)kΩ
(43.6)kΩ
(57.6)kΩ
(80.9)kΩ
(128.0)kΩ
(268.0)kΩ
88.4kΩ
41.7kΩ
26.1kΩ
18.4kΩ
13.7kΩ
10.6kΩ
8.4kΩ
6.7kΩ
5.4kΩ
4.4kΩ
3.5kΩ
2.8kΩ
2.2kΩ
1.7kΩ
1.2kΩ
Series Pt #
Current
Vo (nom)
V_a (req’d)
–6.0
–6.2
–6.4
–6.6
–6.8
–7.0
–7.2
–7.4
–7.6
–7.8
–8.0
–8.2
–8.4
–8.6
–8.8
–9.0
–9.2
–9.4
–9.6
–9.8
–10.0
–10.2
–10.4
–10.6
–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
–13.4
–13.6
–13.8
–14.0
–14.2
–14.5
–15.0
–15.5
–16.0
–16.5
–17.0
PT6644
2.5Adc
–9.0Vdc
(6.9)kΩ
(9.2)kΩ
(11.9)kΩ
(14.0)kΩ
(18.6)kΩ
(23.0)kΩ
(28.3)kΩ
(35.0)kΩ
(43.5)kΩ
(55.0)kΩ
(71.0)kΩ
(95.0)kΩ
(135.0)kΩ
(215.0)kΩ
(455.0)kΩ
64.8kΩ
26.1kΩ
13.1kΩ
6.7kΩ
2.8kΩ
0.2kΩ
PT6643
2Adc
–12.0Vdc
(31.7)kΩ
(36.1)kΩ
(41.2)kΩ
(47.1)kΩ
(54.1)kΩ
(62.6)kΩ
(72.8)kΩ
(85.7)kΩ
(102.0)kΩ
(124.0)kΩ
(155.0)kΩ
(201.0)kΩ
(278.0)kΩ
(432.0)kΩ
(895.0)kΩ
94.8kΩ
41.1kΩ
23.1kΩ
14.2kΩ
8.8kΩ
5.2kΩ
2.7kΩ
0.7kΩ
PT6645
1.5Adc
–15.0Vdc
(25.8)kΩ
(28.3)kΩ
(31.1)kΩ
(34.1)kΩ
(37.3)kΩ
(40.9)kΩ
(44.9)kΩ
(49.3)kΩ
(54.3)kΩ
(59.8)kΩ
(66.1)kΩ
(73.3)kΩ
(81.6)kΩ
(91.3)kΩ
(103.0)kΩ
(117.0)kΩ
(133.0)kΩ
(154.0)kΩ
(181.0)kΩ
(217.0)kΩ
(268.0)kΩ
(343.0)kΩ
(570.0)kΩ
42.3kΩ
14.8kΩ
5.6kΩ
1.1kΩ
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