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Introduction to CUI Inc’s low power dc-dc converters and the selection criteria for 1 – 2 Watt converters. To view CUI's low power dc-dc converter offering visit: http://www.cui.com/Low_Power_DC-DC_Converters
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Low Power Dc-Dc Converters
© 2012 CUI Inc
Introduction
Purpose Introduction to CUI Inc’s low power dc-dc converters
Objectives Selection criteria for 1 W-2 W dc-dc converters
Content: 13 pagesLearning Time: 10 minutes
© 2012 CUI Inc
Criteria to Consider
Inputs/outputs
Power conversion
Isolation
Regulation
Protections
Package
© 2012 CUI Inc
Input Voltage Requirements
Nominal inputvoltage needs
Input ranges:+/-10%2:14:1
Vout+
Vout-
Vin+
Vin-
DC DCSupply Load
Isolation Layer
© 2012 CUI Inc
Single / Dual
Positive / Negative
Fixed Output
Vout+
Vout-
Vin+
Vin-
DC DCSupply Load
Isolation Layer
© 2012 CUI Inc
Power Conversion
+12V
GND
+5V
GND
DC DC
+5V
GND
+12V
GND
DC DC
Step UpStep Down
GND
-5V
+5V
GND
DC DC
Inversion
© 2012 CUI Inc
Isolation
Safety
Signal
Vout+
Vout-
Vin+
Vin-
DC DCSupply Load
Isolation Layer
© 2012 CUI Inc
Regulation
Two categories of devices Regulated & Non-regulated
Regulated Used where the input voltage is not well regulated Outputs do not fluctuate with changes in line and load
Non-regulated Where the upstream signal is well regulate and fluctuations will be minimal Narrow input range Outputs fluctuate with line and load changes
© 2012 CUI Inc
Protections
Short circuit
Over voltage
Over current / over load
Under voltage
© 2012 CUI Inc
CUI Parts
1 W Isolated Dc-Dc Converters – Unregulated
seriesinput range
(V dc)output voltage
(V dc) efficiency package
isolation (V dc)
VAT1-SMT 5, 12, 15, 24 5, +/-5, 9, +/-9, 12, +/-12, 15, +/-15 79% 10 pin SMT 1 K
VBT1-SMT 3.3, 5, 12, 15, 24 3.3, 5, 9, 12, 15 83% 8 pin SMT 1 K
VASD1-SIP 5, 12, 15, 24 5, +/-5, 9, +/-9, 12, +/-12, 15, +/-15 81% 7 pin SIP 1 K
VBSD1-SIP 3.3, 5, 12, 15, 24 3.3, 5, 9, 12, 15 81% 4 pin SIP 1 K
VBSD1-DIP 3.3, 5, 12, 15, 24 3.3, 5, 9, 12, 15 81% 8 pin DIP 1 K
VASD1-DIP 5, 12, 15, 24 5, +/-5, 9, +/-9, 12, +/-12, 15, +/-15 80% 6 pin DIP 1 K
VEFT1-SMT 5, 12, 15, 24 5, +/-5, 9, +/-9, 12, +/-12, 15, +/-15 80% 12 pin SMT 3 K
VESD1-SIP 5, 12, 15, 24 5, +/-5, 9, +/-9, 12, +/-12, 15, +/-15 81% 7 pin SIP 3 K
VFSD1-SIP 3.3, 5, 12, 15, 24 3.3, 5, 9, 12, 15 81% 7 pin SIP 3 K
VHS1-SIP 5, 12, 15, 24 5, 9, 12, 15 78% 7 pin SIP 6 K
© 2012 CUI Inc
CUI Parts (continued)
seriesinput range
(V dc)output voltage
(V dc) efficiency package
isolation (V dc)
VIBLSD1-SIP 5, 12, 15, 24 5, 9, 12, 15 73% 7 pin SIP 1 K
VIBLSD1-DIP 5, 12, 15, 24 5, 9, 12, 15 73% 14 pin DIP 1 K
VIBLT1-SMT 5, 12, 15, 24 5, 9, 12, 15 72% 14 pin SMT 1 K
VWRAS1-SIP4.5–9, 9–18, 18–36,
36–72+/-5, +/-9, +/-12, +/-15 83% 8 pin SIP 1.5 K
VWRBS1-SIP4.5–9, 9–18, 18–36,
36–725, 9, 12, 15 83% 8 pin SIP 1.5 K
1 W Isolated Dc-Dc Converters – Regulated
© 2012 CUI Inc
2 W Isolated Dc-Dc Converters – Unregulated
seriesinput range
(V dc)output voltage
(V dc) efficiency package
isolation (V dc)
VAT2-SMT 5, 12 +/-5, +/-9, +/-12, +/-15 85% 10 pin SMT 1 K
VBT2-SMT 5, 12 3.3, 5, 9, 12, 15 85% 8 pin SMT 1 K
VASD2-SIP 5, 12, 15, 24 +/-5, +/-9, +/-12, +/-15 87% 7 pin SIP 1 K
VBSD2-SIP 3.3, 5, 12, 15, 24 3.3, 5, 9, 12, 15 86% 7 pin SIP 1 K
VESD2-SIP 5, 12, 15, 24 +/-5, +/-9, +/-12, +/-15 87% 7 pin SIP 3 K
VFSD2-SIP 5, 12, 24 5, 9, 12, 15 86% 7 pin SIP 3 K
CUI Parts (continued)
© 2012 CUI Inc
seriesinput range
(V dc)output voltage
(V dc) efficiency package
isolation (V dc)
VWRAS2-SIP4.5–9, 9–18, 18–
36, 36–72+/-5, +/-9, +/-12, +/-15 80% 8 pin SIP 1.5 K
VWRBS2-SIP 4.5–9, 9–18, 18–
36, 36–725, 9, 12, 15 83% 8 pin SIP 1.5 K
VWQBS2-SIP 9–36, 18–72 3.3, 5, 9, 12, 15 82% 9 pin SIP 1.5 K
CUI Parts (continued)
2 W Isolated Dc-Dc Converters – Regulated
© 2012 CUI Inc
Summary
There are a number of criteria to consider when selecting a dc-dc converter
CUI offers a broad line up of regulated and unregulated, isolated dc-dc converters
Learn More View CUI’s line of lower power dc-dc converters
View CUI’s full Power product portfolio
www.cui.com