XRSB-40U_SERIES Datasheet, PDF (5/15 Pages) Bel Fuse Inc. – ISOLATED DC/DC CONVERTERS

ISOLATED DC/DC CONVERTERS
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit On)
Signal High (Unit Off)
Active Low
Signal Low (Unit Off)
Signal High (Unit On)
Active High
Current Sink
-
Min
Typ
-0.3 V
-
2.4 V
-
-0.3 V
-
2.4 V
-
0 mA
-
Max
0.8 V
18 V
0.8 V
18 V
1 mA
Notes
When Remote On/Off pin is
open, for active low option, unit
is off; for active high option, unit
is on
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) Trim Equations for Vo=1.2 V
R_trimdown
=
511
delta
− 10.22
R_trimup
=
(100
+
delta) ⋅Vo ⋅ 5.11 −
0.6125 ⋅ delta
313
− 10.22
Module
Vo
Trim
GND
Rtrimdown
Note:
delta = ^{(Vo _ req − Vo)} ×100[%]
Vo
Vo_req=Desired (trimmed) output voltage [V] Vo=1.202 V
Module
Vo
Trim
Rtrimup
2) Trim Equations for Vo=1.5 V - 12 V
GND
R_trimdown
=
511
delta
− 10.22
R_trimup
=
(100
+
delta) ⋅Vo ⋅ 511−
1.225 ⋅ delta
626
− 10.22
Note:
delta = ^{(Vo _ req −Vo )} ×100[%]
Vo
Vo_req=Desired (trimmed) output voltage [V]
Vo=1.503V, Vo=1.800V, Vo=2.505V, Vo=3.308V, Vo=5.002V, Vo=12.007V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com