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PDF S7AH-03A Data sheet ( Hoja de datos )

Número de pieza S7AH-03A
Descripción NON-ISOLATED DC/DC CONVERTERS
Fabricantes Bel Fuse 
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NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.5V – 5.0V Output / 3A
S7AH-03A / V7AH-03A Series
• Nonisolated
• Compact, low profile surface mount package
• Fixed frequency
• High efficiency means less power dissipation
• Excellent thermal performance
• Optimized for cost
• Remote on/off
• Undervoltage lockout (UVLO)
• Over current and short circuit protection
POWER PRODUCTS
BP02x7AH-03A
Description
The Bel S7AH-03A and V7AH-03A modules are a series of non-isolated, step down DC/DC power converters that operate
from a nominal 12V source. These converters are available in a range of output voltages from 1.5V to 5.0V. They are pack-
aged in a compact, overmolded package rated at 3A. Optional lead forming provides a vertical mount product for minimal
footprint or a surface mount option for a very low profile. Standard features include remote on/off, over current and short circuit
protection, and output voltage adjust. These products may be used almost anywhere low voltage silicon is employed and a
12V source is available. Typical applications include file servers, routers, line cards and other computing and communications
equipment.
Applications
• Distributed power architectures
• Data networking equipment
• Telecommunications
• Computers and peripherals
Part Number Selection
Output
Voltage
5.0V
3.3V
2.5V
1.8V
1.5V
Input
Voltage
12V
12V
12V
12V
12V
Max. Output
Current
3A
3A
3A
3A
3A
Max. Output
Power
15W
9.9W
7.5W
5.4W
4.5W
Typical
Efficiency
91%
90%
88%
85%
84%
Part Number
Surface Mount
S7AH-03A500
S7AH-03A330
S7AH-03A250
S7AH-03A180
S7AH-03A150
Part Number
Vertical Mount
V7AH-03A500
V7AH-03A330
V7AH-03A250
V7AH-03A180
V7AH-03A150
©2003 Bel Fuse Inc. Specifications subject to change without notice. 01.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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S7AH-03A pdf
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NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.5V – 5.0V Output / 3A
POWER PRODUCTS
BP02x7AH-03A
General Specifications
Parameter
Efficiency1
Switching Frequency
Module Symbol Min Typical Max
5.0V
3.3V
2.5V
1.8V
1.5V
η
89 91
88 90
86 88
83 85
82 84
Fsw
5.0V
470 500 530
3.3V
340 370 400
2.5V
270 300 330
1.8V
270 300 330
1.5V
270 300 330
Output Voltage Trim Range2
All
90 110
Weight
All
1. Vin=12V, full load and Ta=25° C.
2. See graphs on pages 11 - 13.
4.9
Units
%
kHz
%
g
Control Specifications
Parameter
Remote On/Off 3
Module
All
Symbol
Vouten
Signal Low (Unit Off)
All
Signal High (Unit On)
All
3. With remote on/off pin 1 open, the module is on.
Min
-0.3
2.8
Typical
Max
1
13.2
Units
V
V
V
©2003 Bel Fuse Inc. Specifications subject to change without notice. 01.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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S7AH-03A arduino
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NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.5V – 5.0V Output / 3A
Output Voltage Set-Point Adjustment
POWER PRODUCTS
BP02x7AH-03A
Trim Down Test Circuit
Vo
Trim
Gnd
Trim Up Test Circuit
Vo
Trim
Gnd
Output Voltage Set-Point Adjustment
x7AH-03A500 Trim Resistor Calculation
Rtrim down = (
23.703
Vo – Vo, adj
– 13.87) Kohm
Rtrim up =
(
4.496
Vo, adj – Vo
– 8.25) Kohm
300
270
240
210
180
150
120
90
60
30
0
4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95
Adjusted output voltage Vo,adj (V)
5
300
270
240
210
180
150
120
90
60
30
0
5
5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5
Adjusted output voltage Vo,adj(V)
©2003 Bel Fuse Inc. Specifications subject to change without notice. 01.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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