SRSB-50T03C BEL [Bel Fuse Inc.], SRSB-50T03C Datasheet - Page 7

• Manufacturer Part Number: SRSB-50T03C
• Description: ISOLATED DC/DC CONVERTERS
• Manufacturer: BEL [Bel Fuse Inc.]

Output Trim Equations
Equations for calculating the trim resistor are shown below. The Trim Down resistor should be connected
between the Trim pin and GND pin. The Trim Up resistor should be connected between the Trim pin and the
Vout pin. Only one of the resistors should be used for any given application.
Minimum trim down voltage is 2.97V
Maximum trim up voltage is 3.63V.
The total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage.
Note:
Vo_req=Desired (trimmed) output voltage [V]
Output voltage Vo=3.308 V
Jul. 09, 2010
Rtrimdown
Rtrimup
300
270
240
210
180
150
120
90
60
30
0
ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input,
delta
2.64
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] •
2.71
=
=
2.77
(
Vo
(
100
=
Adjusted output voltage Vo,adj (V)
2.84
_
delta
511
req
+
Vo
delta
2.9
. 1
−
225
−
Vo
2.97
10
)
)
⋅
Vo
⋅
×
.
3.04
3.3 Vdc/15 A Output
22
delta
100
⋅
[ ]
. 5
k
3.1
Ω
[ ]
11
%
3.17
−
626
3.23
−
3.3
Bel Power Inc., a subsidiary of Bel Fuse Inc.
10
.
22
[ ]
k
1500
1350
1200
1050
900
750
600
450
300
150
Ω
0
3.3
3.33
3.37
Module
Module
Adjusted output voltage Vo,adj(V)
3.4
3.43
3.46
www.belfuse.com
Vout
Trim
GND
Vout
Trim
GND
3.5
3.53
3.56
Rtrimdown
Rtrimup
3.6
3.63
7