LV12S5-100 Datasheet, PDF (6/15 Pages) Wall Industries,Inc. – Low Voltage DC-DC Converter 10-36 Vdc Input 5Vdc Output at 20A Half-Brick Package

Rev. D
TECHNICAL DATASHEET
LV12S5-100
Output Voltage Trim: (5V, 12V, 15V, and 20V Models)
The output is adjustable +/–10% of rated output voltage. To trim the output voltage down, place the trim resistor
between the Trim and -Rs pins (Figure 5). To trim the output voltage up, place the trim resistor between the Trim
and +Rs pins (Figure 4).
The value of the trim resistor with respect to the desired output voltage (Vo) can be derived from the following
formulas, or looked up on the trim table (Table 2).
R1 ⋅Vo ⋅ ^Vonom
RTH =
U1 _−
R1 ⋅Vo
− R lim
Vo −Vonom Vo −Vonom
(in Kohms)
RTL = ^R1⋅Vo − R lim
Vonom − Vo
(in Kohms)
Figure 4: Trim Up
+V_out
+Rs
Pins Facing Down Trim
-Rs
-V_out
RTH
Figure 5: Trim Down
+V_out
+Rs
R_load
Pins Facing Down _Trim
-Rs
-V_out
RTL
R_load
Table 2: Trim Equations for LV Series (5V, 12V, 15V, and 20V Models)
Vonom
5.000
U1 R1 Rlim RTH to +Rs
2.500 5.11 5.11 RTL to -Rs
Percent
Trim
1%
2%
3%
4%
5%
6%
7%
8%
9%
10%
Trim Low
Vo RTL
4.950 500.78
4.900 245.28
4.850 160.11
4.800 117.53
4.750 91.98
4.700 74.95
4.650 62.78
4.600 53.66
4.550 46.56
4.500 40.88
Trim High
Vo RTH
5.050 511.00 All in Kohms
5.100 255.50
5.150 170.33
5.200 127.75
5.250 102.20
5.300 85.17
5.350 73.00
5.400 63.88
5.450 56.78
5.500 51.10
Note that while decreasing the output voltage, the
maximum output current still remains at 20A, and
while increasing the output voltage, the output current
is reduced to maintain a total output power at 100 W.
(888) 597-WALL
www.wallindustries.com
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