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參數(shù)資料
| 型號(hào)： | VRAH-01H1A00 |
| 廠商： | BEL FUSE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 3.3 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT PACKAGE-5 |
| 文件頁(yè)數(shù)： | 3/9頁(yè) |
| 文件大?。?/td> | 330K |
| 代理商： | VRAH-01H1A00 |
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 CONVERTER
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 3.3 Vdc/1 A Output
General Specifications
Parameter
Min
Typ
Max
Notes
Efficiency
VO=3.3 V
VO=2.5 V
VO=1.8 V
VO=1.5 V
VO=1.2 V
83%
80%
76%
73%
70%
86%
83%
79%
76%
73%
-
Measured at Vin=20 V, full load.
Switching Frequency
VO=2.5 V
VO=1.8 V
VO=1.5 V
VO=1.2 V
270 kHz
190 kHz
150 kHz
130 kHz
100 kHz
290 kHz
220 kHz
170 kHz
150 kHz
120 kHz
310 kHz
250 kHz
190 kHz
170 kHz
140 kHz
Output Trim Range
1.2 V
-
3.3 V
Vo=1.2 V when trim pin open.
MTBF
8,040,762 hours
Calculated Per Bell Core SR-332 (IO
=0.8 A, Vin=20 V; Ta = 25
°C)
Dimensions (surface mount)
Inches (L × W × H)
Millimeters (L × W × H)
0.78 x 0.70 x 0.32
19.81 x 17.78 x 8.13
Dimensions (vertical)
Inches (L × W × H)
Millimeters (L × W × H)
0.70 x 0.308 x 0.65
17.78 x 7.82 x 16.51
Weight
-
5.1 g
-
Note:
All specifications are typical at 20V input, full load at 25 °C unless otherwise stated.
Control Specifications
Parameter
Min
Typ
Max
Notes
Remote On/Off
Signal Low (Unit On)
-0.3 V
-
1 V
Signal High (Unit Off)
2.8 V
-
12 V
Remote on/off pin open, unit on.
Output Trim Equations
Equations for calculating the trim resistor (in k) given the desired adjusted voltage (Vadj) and the nominal
output voltage of the converter (Vo) are shown below. The Trim Down resistor should be connected between the
Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of the
resistors should be used for any given application.
5
.
21
7
.
8
=
adj
o
TrimDown
V
R
o
adj
TrimUp
V
R
=
2
.
17
Note:
Output voltage Vo=1.205 V
Module
Vout
Trim
GND
Rtrimdown
Module
Vout
Trim
GND
Rtrimup
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| VRAH-01H250 | 制造商:BEL 制造商全稱:Bel Fuse Inc. 功能描述:NON-ISOLATED DC/DC CONVERTER |
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