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參數(shù)資料
| 型號(hào)： | xRPF-20A1A0 |
| 廠商： | Bel Fuse Inc. |
| 英文描述： | NON-ISOLATED DC/DC CONVERTERS |
| 中文描述： | 非隔離式DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 3/9頁 |
| 文件大?。?/td> | 285K |
| 代理商： | XRPF-20A1A0 |
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
0.9 Vdc - 5.0 Vdc/20 A Output
General Specifications
Parameter
Efficiency (Current Source)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
Efficiency (Current Sink)
Vo=2.5 V
Vo=0.9 V
Switching Frequency
Output Voltage Trim Range
Min
89%
86%
83%
65%
79%
60%
240 kHz
0.9 V
Typ
92%
89%
86%
69%
82%
63%
275 kHz
-
Max
-
-
-
-
-
-
310 kHz
5.0 V
Notes
Measured at Vin=12 V, full load.
Vo=0.9 V when the Trim pin is open.
Calculated Per Bell Core SR-332 (I
O
=
Nominal; T
a
= 25
°
C)
MTBF
5,570,000 hours
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
Note
: All specifications are typical at 25
°
C
unless otherwise stated.
Control Specifications
Parameter
Min
Remote On/Off
Signal Low (Unit Off)
-0.3 V
Signal High (Unit On)
2.4 V
Power Good
Power Good Delay
1
-
Note
: All specifications are typical at 25
°
C
unless otherwise stated.
1. The power good signal is an open collector output. When the output of the module reaches 90% of the
nominal set point, the power good pin is set high.
Output Trim Equations
1.2 x 1.1 x 0.457
30.48 x 27.94 x 11.6
VRPF-20A1A0
1.2 x 1.1 x 0.508
30.48 x 27.94 x 12.91
15 g
0RPF-20A1A0
-
-
Typ
Max
Notes
-
-
0.8 V
13.8 V
Remote On/Off pin open, unit on.
-
8 mS
Equation for calculating the trim resistor (in k
) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up resistor should be connected between the Trim pin and Ground. Trim values should not be less than
280
.
17
.
adj
V
9
=
trim
R
Equation for calculating the trim voltage (in V) given the desired adjusted voltage (Vadj) is shown below. The
Trim Up voltage should be connected between the Trim pin and Ground.
)
17
.
3
×
adj
V
Rs
)
(
17
.
×
=
Vt
Rs
Rt
Rtrim
Module
Vout
GND
Trim
Vt
Module
Vout
GND
Trim
Rt
Rs
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