ISOLATED DC/DC CONVERTERS
48V Input 12V/12A, 3.3V/45A, 5V/30A, 1.2V-2.5V/50A Outputs
Output Trim Equations
Equations for calculating the trim resistor are shown below (Unit: kΩ). The Trim Down resistor should be
connected between the Trim pin and Ground pin. The Trim Up resistor should be connected between the Trim
pin and the Vout. Only one of the resistors should be used for any given application.
1) For Vo=1.5V - 12V:
Vout
511
Rtrimdown =
−10.22
Module
Module
Trim
GND
delta
Rtrimdown
Rtrimup
(100 + delta)⋅Vo⋅5.11− 626
1.225⋅ delta
Rtrimup =
Notes:
−10.22
Vout
Trim
GND
(
)
Vo_ req −Vo
[ ]
×100 %
delta =
Vo
Vo_req=Desired (trimmed) output voltage [V]; Vo=output voltage
Vo=12.006V for 12V output; Vo=5V for 5.0V output;; Vo=3.308V for 3.3V output; Vo=2.505V for 2.5V output;
Vo=1.804V for 1.8V output; Vo=1.503V for 1.5V output
2) For Vo=1.2V:
(100 + delta)⋅Vo⋅5.11− 313
0.6125⋅ delta
511
Rtrimup =
−10.22
Rtrimdown =
Notes:
−10.22
delta
(
)
Vo_ req −Vo
[ ]
×100 %
delta =
Vo
Vo_req=Desired (trimmed) output voltage [V]; Vo=output voltage
Vo=1.202V for 1.2V output
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