Volant NCA015 Series Non-Isolated 15A SIP/SMT DC/DC ConvertersFeatures:
9Small size, minimal footprint – SMT/SIP package 915A Output Current (all voltages)9High Efficiency: up to 96%9High reliability9RoHS Compliant
9Cost efficient open frame design
9Output voltage programmable by an external resistor 9Monotonic Start with Pre-Bias9Over-current and Over-temperature protection Output
Input
Efficiency
PARD (mVp-p) RegulationMaxVinNom.(V)Range(V)IinMax(A)Full LoadVout (V) Iout
(A)
Typ. Max. Line Load Typ.1 15 28 50+/-0.2%+/-0.4% 5 3
–5.5 5.81 82% 1.2 15 28 50 +/-0.2%+/-0.4% 5 3
–5.5 6.89 84% 1.5 15 28 50 +/-0.2%+/-0.4% 5 3
–5.5 8.42 87% 1.8 15 28 50 +/-0.2%+/-0.4% 5 3
–5.5 9.89 88% 2 15 28 50+/-0.2%+/-0.4% 5 3–5.5
10.86 89% 2.5 15 28 50 +/-0.2%+/-0.4% 5 3
–5.5 11.5 92% 3.3 15 28 50 +/-0.2%+/-0.4% 5 4.5-5.5 11.45 94%Volant NCA015 Series
Non-Isolated 15A SIP/SMT DC/DC Converters Input Characteristics Notes & Conditions Min Typ. Max UnitsInput Voltage Operating Range 3.0 5 5.5 Vdc
Input Reflected Ripple Current 100 mA p-p Inrush Current Transient 0.4 A2sInput Filter Type (external) 100 µFInput Turn ON Threshold 2.8 VInput Turn OFF Threshold 2.7 VON Control Open or 0 to +0.4VOFF Control +2.8V to Vin (<3mA)
Output Characteristics Notes & Conditions Min Typ. Max UnitsVout Accuracy 50% load -1.5 +1.5 %Output Loading 0 15 A
OutputRipple&***********************mV
Maximum Capacitive Load Low ESR 8000 µFVout Trim Range (Nom) 0.9 3.3 V
Total Accuracy Over line/load temperature <3%Current Limit 19.5 23 27 AOutput Line Regulation -0.2 +0.2 %Output Load Regulation -0.5 +0.5 %Turn-on Overshoot 1 %
SC Protection Technique Hiccup with auto recoveryPre-bias Start-up at output Unit starts monotonically with pre-bias
Dynamic Characteristics Notes & Conditions Min Typ. Max UnitsLoad Transient 50% step, 2.5A/µs100 mVSettlingTime 100µs
Frequency 300khz
Start-Up Time Vin to Vout and On/Off to VoutVout rise to monotonic<20 ms
General Specifications Notes & Conditions Min Typ. Max UnitsMTBF Calculated(MIL-HDBK-217F)1.4x106 Hrs
Demonstrated @ 90% ConfidenceLevel1 x106 Hrs
Thermal Protection Hotspot 110 120 °C
Operating Temperature Without derating -40 60 °CDimensions 2”Lx0.34”Wx0.5”H(50.8x8.64x12.7mm)
Pin Dimensions 0.03” (0.76mm)
Pin Material Round copper with tin-lead plated overnickel underplateWeight 0.3 ounces (8.5g)Flammability Rating UL94V-0Standards Compliance
CSA C22.2, No.60950/UL 60950, Third Edition (2000), File UL E165113Volant NCA015 Series
Non-Isolated 15A SIP/SMT DC/DC ConvertersThermal Considerations
The power module operates in a variety of thermal environments; however, sufficient cooling should be provided to helpensure reliable operation of the unit.
The thermal data presented is based on measurements taken at various airflows. Note that airflow is parallel to the long axisof the module as shown in Figure 1 and derating applies accordingly.Figure 1. Thermal Tests Set-Up.
The temperature at either location should not exceed 110oC. The output power of the module should not exceed the ratedpower for the module(Vo,set X Io,max).Convection Requirements for Cooling
To predict the approximate cooling needed for the module, refer to the Power Derating Curves in Figures 2-15 .These derating curve are approximations of the ambient temperature and airflow required to keep the power moduletemperature below it's maximum rating. Once the module is assembled in the actual system, the module's temperatureshould be verified.Volant NCA015 Series
Non-Isolated 15A SIP/SMT DC/DC Converters TYPICAL DERATING CURVES SIP/SMT VERSION
Fig. 2. SMT Power Derating vs Output Current for 5Vin 3.3V Out.
Fig. 3. SIP Power Derating vs Output Current for 5Vin 3.3V Out.Volant NCA015 Series
Non-Isolated 15A SIP/SMT DC/DC Converters
Fig 4. SMT Power Derating vs Output Current for 5Vin 2.5V Out.
Fig 5. SIP Power Derating vs Output Current for 5Vin 2.5V Out.Volant NCA015 Series
Non-Isolated 15A SIP/SMT DC/DC Converters
Fig 6. SMT Power Derating vs Output Current for 5Vin 2.0V Out.
Fig 7. SIP Power Derating vs Output Current for 5Vin 2.0V Out.Volant NCA015 Series
Fig 8. SMT Power Derating vs Output Current for 5Vin 1.8V Out.
Fig 9. SIP Power Derating vs Output Current for 5Vin 1.8V Out.Volant NCA015 Series
Non-Isolated 15A SIP/SMT DC/DC Converters
Fig 10. SMT Power Derating vs Output Current for 5Vin 1.5V Out.
Fig 11. SIP Power Derating vs Output Current for 5Vin 1.5V Out.Volant NCA015 Series
Fig 12. SMT Power Derating vs Output Current for 5Vin 1.2V Out.
Fig 13. SIP Power Derating vs Output Current for 5Vin 1.2V Out.Volant NCA015 Series
Fig. 14. SMT Power Derating vs Output Current for 5Vin 1.0V Out.
Fig 15. SIP Power Derating vs Output Current for 5Vin 1.0V Out.Volant NCA015 Series
Non-Isolated 15A SIP/SMT DC/DC Converters TYPICAL EFFICIENCY CURVES FOR VARIOUS VOLTAGE MODELSSIP/SMT VERSION.
Fig 16. SMT Efficiency Curves for Vout=3.3V (25C)
Fig 17. SIP Efficiency Curves for Vout=3.3V (25C)Volant NCA015 Series
Fig 18. SMT Efficiency Curves for Vout=2.5V (25C)
Fig 19. SIP Efficiency Curves for Vout=2.5V (25C)
Volant NCA015 Series Non-Isolated 15A SIP/SMT DC/DC Converters
Fig 20. SMT Efficiency Curves for Vout=2.0V (25C)
Fig 21. SIP Efficiency Curves for Vout=2.0V (25C)Volant NCA015 Series
Fig 22. SMT Efficiency Curves for Vout=1.8V (25C)
Fig 23. SIP Efficiency Curves for Vout=1.8V (25C)Volant NCA015 Series
Fig 24. SMT Efficiency Curves for Vout=1.5V (25C)
Fig 25. SIP Efficiency Curves for Vout=1.5V (25C)Volant NCA015 Series
Fig 26. SMT Efficiency Curves for Vout=1.2V (25C)
Fig 27. SIP Efficiency Curves for Vout=1.2V (25C)Volant NCA015 Series
Fig 28. SMT Efficiency Curves for Vout=1.0V (25C)
Fig 29. SIP Efficiency Curves for Vout=1.0V (25C)Volant NCA015 Series
Non-Isolated 15A SIP/SMT DC/DC Converters Typical Start UpCh 1. EnableCh2. Vout, Full load.Ch3. Q1-VgsCh4. Q2-Vgs
Typical Start Up with pre-biasCh1 : EnableCh2 : Vout
Ch3 : Output current at No Load.
Volant NCA015 Series
Non-Isolated 15A SIP/SMT DC/DC ConvertersTypical Output Noise and Ripple
Output Voltage Set point adjustment.
The following relationship establish the calculation of external resistors:51107525
.021070??=Vo R adj
For Vout setting an external resistor is connected between the TRIM and Ground Pin.Resistor values for different output voltages are calculated as given in the table:Vo, set (Volts)
RAdj (K Ω)3.3 3.160
2.5 6.947 2.0 11.780 1.8 15.004 1.5 2
3.077 1.2 41.973 1.0 80.02 0.9 137.74 0.75 OpenRemote Sense:
All C&D SMT/SIP power modules offer an option for remote sense. The remote sense compensates for any distribution dropsto accurately control voltage at the point of load. The voltage between the sense pin to Vout pin should not exceed 0.5V.
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