0RQB-C5T_SERIES Datasheet, PDF (5/12 Pages) Bel Fuse Inc. – ISOLATED DC/DC CONVERTERS

ISOLATED DC/DC CONVERTERS
48 Vdc Input 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A 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=1.5 V – 12 V:
Rtrimdown = ⁵¹¹ −10.22
delta
Rtrimup = ^{(100 + delta) ⋅Vo ⋅ 5.11 − 626} −10.22
1.225⋅ delta
Note:
delta = ^{(Vo _ req −Vo)} ×100[%]
Vo
Vout
Module Trim
Rtrimdown
GND
Vout
Module Trim
Rtrimup
GND
Vo_req=Desired (trimmed) output voltage [V]; Vo=output voltage
Vo=12.004 V for 12 V output; Vo=5 V for 5.004 V output; Vo=3.308 V for 3.3 V output; Vo=2.503 V for 2.5 V
output; Vo=1.808 V for 1.8 V output; Vo=1.503 V for 1.5 V output
2) For Vo=1.2 V:
Rtrimdown = ⁵¹¹ −10.22
delta
Rtrimup = ^{(100 + delta) ⋅Vo ⋅ 5.11− 313} −10.22
0.6125⋅ delta
Note:
delta = ^{(Vo _ req −Vo)} ×100[%]
Vo
Vo_req=Desired (trimmed) output voltage [V]; Vo=output voltage
Vo=1.202 V for 1.2 V output
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com