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SELECTION GUIDE
CRE1 Series
Isolated 1W Single Output Isolated DC-DC Converters
Order Code1 Nominal Input Voltage Output Voltage Output Current Load Regulation Ripple & Noise Input Current at Rated Load Efficiency Isolation Capacitance MTTF2
FEATURES n UL 60950 recognised3 n Single Isolated output n 1kVDC or 3kVDC option ‘Hi Pot Test’ n Wide temperature performance at full n 1W load -40°C to 85°C4 n Industry Standard Pinout n 3.3V, 5V, 12V & 24V Inputs n 5V, 12V & 15V outputs n Pin Compatible with CME, CRL2, LME,
MEE1, MEE3, MTE1, NKE, NME, NML & NTE series n Through hole and surface mount options n available PRODUCT OVERVIEW The CRE1 series are a cost effective 1W DC-DC converter series, in industry standard packages with industry standard pinout. Popular input and output voltages are available. The galvanic isolation allows the device to be configured to provide an isolated negative rail in systems where only positive rails exist. The wide temperature range guarantees startup from –40°C and full 1 watt output at 85°C3.
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V
V
mA
% mV p-p Typ. Max. Typ. Max.
mA
% Min. Typ.
pF
MIL. Tel. kHrs
CRE1S0505DC 5 5 200 12 14 16 40 286 65 70 30
CRE1S0505SC 5 5 200 12 14 16 40 286 65 70 30
CRE1S0515SC 5 15 67 6 7.5 10 25 250 77 80 40
CRE1S1205SC 12 5 200 8 10 12 30 117 68 71 33
CRE1S1212SC 12 12 83 4 5 8 20 104 75 80 55
CRE1S2405SC 24 5 200 8.5 10 13 30 58 67 71 40
CRE1S2412SC 24 12 83 3 4 10 25 52 75 80 78
3KVDC isolation options
CRE1S0305S3C 3.3 5 200 10 12 15 25 400 72 75 35
CRE1S0505S3C 5 5 200 6 8 15 25 250 73 77 24
Surface mount options
CRE1S0505MC 5 5 200 12.8 15 62 85 294
68 35 6857
CRE1S0505MEC 5 5 200 6.5 8 25 70 239 79 82 22 3041
INPUT CHARACTERISTICS
Parameter
Conditions
Continuous operation, 3.3V input types
Voltage range
Continuous operation, 5V input types Continuous operation, 12V input types
Continuous operation, 24V input types
3.3V & 12V input types
Reflected ripple current
5V & 24V input types CRE1S0505MC
CRE1S0505MEC
Min. Typ. Max. Units
2.97 3.3 3.63 4.5 5.0 5.5
V
10.8 12 13.2
21.6 24 26.4
1 15
2 30
15 47
mA p-p
5 15
OUTPUT CHARACTERISTICS
Parameter
Conditions
Rated Power
TA=-40°C to 85°C3
Voltage Set Point Accuracy See tolerance envelope
Line regulation
High VIN to low VIN
Min. Typ. Max. Units 1W
1.1 1.2 %/%
ISOLATION CHARACTERISTICS
Parameter
Conditions
Isolation test voltage
C Versions Flash tested for 1 second 3C Versions Flash tested for 1 second
Resistance
Viso= 1000VDC
Min. Typ. Max. Units
1000 3000
VDC
10 GΩ
GENERAL CHARACTERISTICS
Parameter
Conditions
3.3V input types
5V input types
Switching frequency
12V input types
24V input types
CRE1S0505MEC
Min. Typ. Max. Units 115 110 kHz 145 100 80
1. If components are required in tape and reel format suffix order code with -R, e.g. CRE1S0505MC-R. 2. Calculated using MIL-HDBK-217 FN2 and Telcordia SR-332 calculation model with nominal input voltage at full load. 3. UL 60950 recognition does not apply to CRE1S0505MC. 4. 24V input parts prior to date code D1635 have operating temperature range of 0 to 70°C.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
KDC_CRE1.D02 Page 1 of 14
CRE1 Series
Isolated 1W Single Output Isolated DC-DC Converters
ABSOLUTE MAXIMUM RATINGS Lead temperature 1.5mm from case for 10 seconds Input voltage VIN, 3.3V input Input voltage VIN, 5V input Input voltage VIN, 12V input Input voltage VIN, 24V input
260°C 5.5V 7V 15V 28V
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Specification
All output types1
Storage
5V output types
Case temperature rise above
All other output types
ambient
CRE1S0505MC
CRE1S0505MEC
Cooling
Free air convection
Min. Typ. Max. Units
-40 85
-50 130
41 32
°C
43
12.5
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test voltage, applied for a specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions CRE1 series of DC-DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second for C versions and 3kVDC for 1 second for 3C versions.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The CRE1 series, through hole variants (excluding surface mount variants) have been recognised by Underwriters Laboratory for functional insulation, both input and output should normally be maintained within SELV limits i.e. less than 42.4V peak, or 60VDC. The isolation test voltage represents a measure of immunity to transient voltages and the part should never be use.