Datasheet

R
set
+ 10 kW
0.8 V
V
out
* V
min
* R
s
kW
PTV12020W/L
www.ti.com SLTS231C –NOVEMBER 2004–REVISED FEBRUARY 2007
Use Equation 1 to calculate the adjust resistor value. See Table 2 for parameters, R
s
and V
min
.
Equation 1. Output Voltage Adjust
Table 2. Adjust Formula Parameters
PARAMETER PART NUMBER
PTV12020W PTV12020L
V
MIN
(V) 1.2 0.8
(1)
V
MAX
(V) 5.5 1.8
R
s
(kΩ) 1.82 7.87
Table 3. Calculated Values of R
SET
for Other Output Voltages
PTV12020W PTV12020L
V
O
(V) R
SET
(kΩ) V
O
(V) R
SET
(kΩ) V
O
(V) R
SET
(kΩ)
1.200 Open 2.70 3.51 0.800 Open
1.250 158.0 2.80 3.18 0.825 312.0
1.300 78.2 2.90 2.89 0.850 152.0
1.350 51.5 3.00 2.62 0.875 98.8
1.400 38.2 3.10 2.39 0.900 72.1
1.450 30.2 3.20 2.18 0.925 56.1
1.50 24.8 3.30 1.99 0.950 45.5
1.55 21.0 3.40 1.82 0.975 37.8
1.60 18.2 3.50 1.66 1.000 32.1
1.65 16.0 3.60 1.51 1.025 27.7
1.70 14.2 3.70 1.38 1.050 24.1
1.75 12.7 3.80 1.26 1.075 21.2
1.80 11.5 3.90 1.14 1.100 18.8
1.85 10.5 4.00 1.04 1.125 16.7
1.90 9.61 4.10 0.939 1.150 15.0
1.95 8.85 4.20 0.847 1.175 13.5
2.00 8.18 4.30 0.761 1.200 12.1
2.05 7.59 4.40 0.680 1.250 9.91
2.10 7.07 4.50 0.604 1.300 8.13
2.15 6.60 4.60 0.533 1.350 6.68
2.20 6.18 4.70 0.466 1.400 5.46
2.25 5.80 4.80 0.402 1.450 4.44
2.30 5.45 4.90 0.342 1.50 3.56
2.35 5.14 5.00 0.285 1.55 2.8
2.40 4.85 5.10 0.231 1.60 2.13
2.45 4.58 5.20 0.180 1.65 1.54
2.50 4.33 5.30 0.131 1.70 1.02
2.55 4.11 5.40 0.085 1.75 0.551
2.60 3.89 5.50 0.041 1.80 0.130
2.65 3.70
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