LV12S28-150 Datasheet, PDF (6/15 Pages) Wall Industries,Inc. – Low Voltage DC-DC Converter 10-36 Vdc Input 28Vdc Output at 5.36A Half-Brick Package

Rev. C
TECHNICAL DATASHEET
LV12S28-150
Output Voltage Trim: (24V, 26V, and 28V Models)
The output is adjustable +/–10% of rated output voltage. To trim the output voltage up, place the trim resistor
between the Trim and –Rs pins (Figure 5). To trim the output voltage down, 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).
RTH
=
Vo
Vref
−Vref _−
Vref
− R lim
RH
RL
(in Kohms)
RTL
=
Vo − Vref
Vref _− Vo − Vref
− R lim
RL
RH
(in Kohms)
Figure 4: Trim Down
+V_out
+Rs
Pins Facing Down Trim
Figure 5: Trim Up
RTL
R_load
+V_out
+Rs
Pins Facing Down _Trim
-Rs
-V_out
-Rs
-V_out
RTH
R_load
Table 2: Trim Equations for LV Series (24V, 26V, and 28V Models)
Vonom Vref RH RL Rlim RTH to -Rs
28.000 2.495 26.10 2.55 8.25 RTL to +Rs
Percent
Trim
1%
2%
3%
4%
5%
6%
7%
8%
9%
10%
Trim Low
Vo RTL
27.720 2101.52
27.440 1091.41
27.160 729.95
26.880 544.19
26.600 431.08
26.320 354.96
26.040 300.24
25.760 259.00
25.480 226.82
25.200 201.00
Trim High
Vo RTH
28.280 254.39 All in Kohms
28.560 115.10
28.840 72.35
29.120 51.61
29.400 39.35
29.680 31.27
29.960 25.53
30.240 21.24
30.520 17.92
30.800 15.28
Note that while decreasing the output voltage, the
maximum output current still remains at 5.36A, and
while increasing the output voltage, the output current
is reduced to maintain a total output power at 150 W.
(888) 597-WALL
www.wallindustries.com
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