DC/DC Converter

MORNSUN DC DC converter includes isolated DC DC converter, non isolated DC DC converter and high voltage output with the package of SMD, SIP, DIP and other optional mounting, and the range is from 0.25 to 200W. MORNSUN DC DC power converter can be widely used in industrial control, medical devices, power electronics, instrumentation, rail transportation, communications, etc. We hope that those high-efficiency, excellent-quality, and cost-effective DC DC converter power supply is an ideal fit for your application needs.

DC/DC Converter
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Series Power(W) Vin(VDC) Vout(VDC) No. of Outputs Isolation(VDC) Package 3D Impression Drawing (.stp) Certification Datasheet Sample Buy
URD48xxxxD-30WR3 30 18~75 5~24 2 3000 open frame - CE - URD48xxxxD-30WR3 - sample request - buy on line -
URD480924D-30WR3 30 18~75 9,24 2 3000 open frame - - URD480924D-30WR3 申请 buy on line
URD480524D-30WR3 30 18~75 5,24 2 3000 open frame - CE URD480524D-30WR3 申请 buy on line
URA_LD-30WR3 30 9~75 5~24 2 1500 DIP URA_LD-30WR3.stp - CE - URA_LD-30WR3 - sample request - buy on line -
URA2405LD-30WR3 30 9~36 ±5 2 1500 DIP URA_LD-30WR3.stp CE URA2405LD-30WR3 申请 buy on line
URA2412LD-30WR3 30 9~36 ±12 2 1500 DIP URA_LD-30WR3.stp CE URA2412LD-30WR3 申请 buy on line
URA2415LD-30WR3 30 9~36 ±15 2 1500 DIP URA_LD-30WR3.stp CE URA2415LD-30WR3 申请 buy on line
URA2424LD-30WR3 30 9~36 ±24 2 1500 DIP URA_LD-30WR3.stp CE URA2424LD-30WR3 申请 buy on line
URA4805LD-30WR3 30 18~75 ±5 2 1500 DIP URA_LD-30WR3.stp CE URA4805LD-30WR3 申请 buy on line
URA4812LD-30WR3 30 18~75 ±12 2 1500 DIP URA_LD-30WR3.stp CE URA4812LD-30WR3 申请 buy on line
URA4815LD-30WR3 30 18~75 ±12 2 1500 DIP URA_LD-30WR3.stp CE URA4815LD-30WR3 申请 buy on line
URB_LD-30WR3 30 9~75 3.3~24 1 1500 DIP URB_LD-30WR3.stp - CE UL CB - URB_LD-30WR3 - sample request - buy on line -
URB2403LD-30WR3 30 9~36 3.3 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB2403LD-30WR3 申请 buy on line
URB2405LD-30WR3 30 9~36 5 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB2405LD-30WR3 申请 buy on line
URB2409LD-30WR3 30 9~36 9 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB2409LD-30WR3 申请 buy on line
URB2412LD-30WR3 30 9~36 12 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB2412LD-30WR3 申请 buy on line
URB2415LD-30WR3 30 9~36 15 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB2415LD-30WR3 申请 buy on line
URB2424LD-30WR3 30 9~36 24 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB2424LD-30WR3 申请 buy on line
URB4803LD-30WR3 30 18~75 3.3 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB4803LD-30WR3 申请 buy on line
URB4805LD-30WR3 30 18~75 5 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB4805LD-30WR3 申请 buy on line
URB4812LD-30WR3 30 18~75 12 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB4812LD-30WR3 申请 buy on line
URB4815LD-30WR3 30 18~75 15 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB4815LD-30WR3 申请 buy on line
URB4824LD-30WR3 30 18~75 24 1 1500 DIP URB_LD-30WR3.stp CE UL CB URB4824LD-30WR3 申请 buy on line
VRB_LD-30WR3 30 24~48 3.3~24 1 1500 DIP VRB_LD-30WR3.stp - CE - VRB_LD-30WR3 - sample request - buy on line -
VRB2403LD-30WR3 30 18~36 3.3 1 1500 DIP VRB_LD-30WR3.stp CE VRB2403LD-30WR3 申请 buy on line
VRB2405LD-30WR3 30 18~36 5 1 1500 DIP VRB_LD-30WR3.stp CE VRB2405LD-30WR3 申请 buy on line
VRB2409LD-30WR3 30 18~36 9 1 1500 DIP VRB_LD-30WR3.stp CE VRB2409LD-30WR3 申请 buy on line
VRB2412LD-30WR3 30 18~36 12 1 1500 DIP VRB_LD-30WR3.stp CE VRB2412LD-30WR3 申请 buy on line
VRB2415LD-30WR3 30 18~36 15 1 1500 DIP VRB_LD-30WR3.stp CE VRB2415LD-30WR3 申请 buy on line
VRB2424LD-30WR3 30 18~36 24 1 1500 DIP VRB_LD-30WR3.stp CE VRB2424LD-30WR3 申请 buy on line
VRB4803LD-30WR3 30 36~75 3.3 1 1500 DIP VRB_LD-30WR3.stp CE VRB4803LD-30WR3 申请 buy on line
VRB4805LD-30WR3 30 36~75 5 1 1500 DIP VRB_LD-30WR3.stp CE VRB4805LD-30WR3 申请 buy on line
VRB4812LD-30WR3 30 36~75 12 1 1500 DIP VRB_LD-30WR3.stp CE VRB4812LD-30WR3 申请 buy on line
VRB4815LD-30WR3 30 36~75 15 1 1500 DIP VRB_LD-30WR3.stp CE VRB4815LD-30WR3 申请 buy on line
VRB4824LD-30WR3 30 36~75 24 1 1500 DIP VRB_LD-30WR3.stp CE VRB4824LD-30WR3 申请 buy on line
URB_YMD-30WR3 30 18~75 5~24 1 1500 DIP URB_YMD-30WR3.stp - CE - URB_YMD-30WR3 - sample request - buy on line -
URB4805YMD-30WR3 30 18~75 5 1 1500 DIP URB_YMD-30WR3.stp CE URB4805YMD-30WR3 申请 buy on line
URB4812YMD-30WR3 30 18~75 12 1 1500 DIP URB_YMD-30WR3.stp CE URB4812YMD-30WR3 申请 buy on line
URB4815YMD-30WR3 30 18~75 15 1 1500 DIP URB_YMD-30WR3.stp CE URB4815YMD-30WR3 申请 buy on line
URB4824YMD-30WR3 30 18~75 24 1 1500 DIP URB_YMD-30WR3.stp CE URB4824YMD-30WR3 申请 buy on line
PV75-36D15400-01 32 250~3300 15~400 2 6000VAC DIP PV75-36D15400-01.stp - - PV75-36D15400-01 - sample request - buy on line -
PV75-36D15400-01 32 250~3300 15,400 2 6000VAC DIP PV75-36D15400-01.stp - PV75-36D15400-01 申请 buy on line
HO1-P202-20D 40 14~18 2000 1 - DIP - - HO1-P202-20D - sample request - buy on line -
HO1-P202-20D 40 14~18 2000 1 - DIP - - HO1-P202-20D 申请 buy on line
URF1D_LD-40WR3 40 40~160 3.3~48 1 3000 DIP URF1D_LD-40WR3.stp - CE - URF1D_LD-40WR3 - sample request - buy on line -
URF1D03LD-40WR3 40 40~160 3.3 1 3000 DIP URF1D_LD-40WR3.stp CE URF1D03LD-40WR3 申请 buy on line
URF1D05LD-40WR3 40 40~160 5 1 3000 DIP URF1D_LD-40WR3.stp CE URF1D05LD-40WR3 申请 buy on line
URF1D12LD-40WR3 40 40~160 12 1 3000 DIP URF1D_LD-40WR3.stp CE URF1D12LD-40WR3 申请 buy on line
URF1D15LD-40WR3 40 40~160 15 1 3000 DIP URF1D_LD-40WR3.stp CE URF1D15LD-40WR3 申请 buy on line
URF1D24LD-40WR3 40 40~160 24 1 3000 DIP URF1D_LD-40WR3.stp CE URF1D24LD-40WR3 申请 buy on line
URF1D48LD-40WR3 40 40~160 48 1 3000 DIP URF1D_LD-40WR3.stp CE URF1D48LD-40WR3 申请 buy on line
HO1-P102-20D 40 14~18 1000 1 - DIP - - HO1-P102-20D - sample request - buy on line -
HO1-P102-20D 40 14~18 1000 1 - DIP - - HO1-P102-20D 申请 buy on line
VRB_LD-40WHR3 40 18~75 12~24 1 1500 DIP - CE - VRB_LD-40WHR3 - sample request - buy on line -
VRB2405LD-40WHR3 40 18~36 5 1 1500 DIP - - VRB2405LD-40WHR3 申请 buy on line
VRB2412LD-40WHR3 40 18~36 12 1 1500 DIP - CE VRB2412LD-40WHR3 申请 buy on line
VRB2415LD-40WHR3 40 18~36 15 1 1500 DIP - CE VRB2415LD-40WHR3 申请 buy on line
VRB2424LD-40WHR3 40 18~36 24 1 1500 DIP - CE VRB2424LD-40WHR3 申请 buy on line
VRB4812LD-40WHR3 40 36~75 12 1 1500 DIP - CE VRB4812LD-40WHR3 申请 buy on line
VRB4815LD-40WHR3 40 36~75 15 1 1500 DIP - CE VRB4815LD-40WHR3 申请 buy on line
VRB4824LD-40WHR3 40 36~75 24 1 1500 DIP - CE VRB4824LD-40WHR3 申请 buy on line
PV40-27Bxx 40 200~1200 12~24 1 4000VAC DIP PV40-27Bxx.stp - - PV40-27Bxx - sample request - buy on line -
PV40-27B12 40 200~1200 12 1 4000VAC DIP PV40-27Bxx.stp - PV40-27B12 申请 buy on line
PV40-27B15 40 200~1200 15 1 4000VAC DIP PV40-27Bxx.stp - PV40-27B15 申请 buy on line
PV40-27B24 40 200~1200 24 1 4000VAC DIP PV40-27Bxx.stp - PV40-27B24 申请 buy on line
PV45-29D1515-15 45 150~1500 15 2 4000 DIP PV45-29D.stp - - PV45-29D1515-15 - sample request - buy on line -
PV45-29D1515-15 45 150~1500 15 2 4000VAC Chassis PV45-29D.stp - PV45-29D1515-15 申请 buy on line
PV45-29D1505-10 45 150~1500 15,5 2 4000 DIP PV45-29D.stp - - PV45-29D1505-10 - sample request - buy on line -
PV45-29D1505-10 45 150~1500 15,5 2 4000VAC DIP PV45-29D.stp - PV45-29D1505-10 申请 buy on line
PV45-29D1508-06 45 150~1500 15,8 2 4000 DIP PV45-29D.stp - - PV45-29D1508-06 - sample request - buy on line -
PV45-29D1508-06 45 150~1500 15,8 2 4000VAC DIP PV45-29D.stp - PV45-29D1508-06 申请 buy on line
VRB48_LD-50WHR3 50 36~75 3.3~24 1 1500 DIP - - VRB48_LD-50WHR3 - sample request - buy on line -
VRB4803LD-50WHR3 50 36~75 3.3 1 1500 DIP - - VRB4803LD-50WHR3 申请 buy on line
VRB4805LD-50WHR3 50 36~75 5 1 1500 DIP - - VRB4805LD-50WHR3 申请 buy on line
VRB4812LD-50WHR3 50 36~75 12 1 1500 DIP - - VRB4812LD-50WHR3 申请 buy on line
VRB4815LD-50WHR3 50 36~75 15 1 1500 DIP - - VRB4815LD-50WHR3 申请 buy on line
VRB4824LD-50WHR3 50 36~75 24 1 1500 DIP - - VRB4824LD-50WHR3 申请 buy on line
PV50-29D1505-20 50 150~1500 15,5 2 4000VAC Open frame - - PV50-29D1505-20 - sample request - buy on line -
PV50-29D1505-20 50 150~1500 15,5 2 4000VAC Open frame - - PV50-29D1505-20 申请 buy on line
URF1D_QB-50WR3 50 43~160 3.3~48 1 3000VAC DIP - CE - URF1D_QB-50WR3 - sample request - buy on line -
URF1D03QB-50WR3 50 43~160 3.3 1 3000VAC DIP - CE URF1D03QB-50WR3 申请 buy on line
URF1D05QB-50WR3 50 43~160 5 1 3000VAC DIP - CE URF1D05QB-50WR3 申请 buy on line
URF1D12QB-50WR3 50 43~160 12 1 3000VAC DIP - CE URF1D12QB-50WR3 申请 buy on line
URF1D15QB-50WR3 50 43~160 15 1 3000VAC DIP - CE URF1D15QB-50WR3 申请 buy on line
URF1D24QB-50WR3 50 43~160 24 1 3000VAC DIP - CE URF1D24QB-50WR3 申请 buy on line
URF1D48QB-50WR3 50 43~160 48 1 3000VAC DIP - CE URF1D48QB-50WR3 申请 buy on line
URF1D_QB-50WHR3 50 43~160 3.3~48 1 3000VAC DIP(With heatsink) - - URF1D_QB-50WHR3 - sample request - buy on line -
URF1D03QB-50WHR3 50 43~160 3.3 1 3000VAC DIP(With heatsink) - - URF1D03QB-50WHR3 申请 buy on line
URF1D05QB-50WHR3 50 43~160 5 1 3000VAC DIP(With heatsink) - - URF1D05QB-50WHR3 申请 buy on line
URF1D12QB-50WHR3 50 43~160 12 1 3000VAC DIP(With heatsink) - - URF1D12QB-50WHR3 申请 buy on line
URF1D15QB-50WHR3 50 43~160 15 1 3000VAC DIP(With heatsink) - - URF1D15QB-50WHR3 申请 buy on line
URF1D24QB-50WHR3 50 43~160 24 1 3000VAC DIP(With heatsink) - - URF1D24QB-50WHR3 申请 buy on line
URF1D48QB-50WHR3 50 43~160 48 1 3000VAC DIP(With heatsink) - - URF1D48QB-50WHR3 申请 buy on line
VRB24_LD-50WR3 50 18~36 3.3~24 1 1500 DIP - CE - VRB24_LD-50WR3 - sample request - buy on line -
VRB2403LD-50WR3 50 18~36 3.3 1 1500 DIP - CE VRB2403LD-50WR3 申请 buy on line
VRB2405LD-50WR3 50 18~36 5 1 1500 DIP - CE VRB2405LD-50WR3 申请 buy on line
VRB2412LD-50WR3 50 18~36 12 1 1500 DIP - CE VRB2412LD-50WR3 申请 buy on line
VRB2415LD-50WR3 50 18~36 15 1 1500 DIP - CE VRB2415LD-50WR3 申请 buy on line
VRB2424LD-50WR3 50 18~36 24 1 1500 DIP - CE VRB2424LD-50WR3 申请 buy on line
VRB48_LD-50WR3 50 36~75 3.3~24 1 1500 DIP - - VRB48_LD-50WR3 - sample request - buy on line -
VRB4803LD-50WR3 50 36~75 3.3 1 1500 DIP - - VRB4803LD-50WR3 申请 buy on line
VRB4805LD-50WR3 50 36~75 5 1 1500 DIP - - VRB4805LD-50WR3 申请 buy on line
VRB4812LD-50WR3 50 36~75 12 1 1500 DIP - - VRB4812LD-50WR3 申请 buy on line
VRB4815LD-50WR3 50 36~75 15 1 1500 DIP - - VRB4815LD-50WR3 申请 buy on line
VRB4824LD-50WR3 50 36~75 24 1 1500 DIP - - VRB4824LD-50WR3 申请 buy on line
PV60-27D1215-13 60 200~1100 12,15 2 4000VAC Chassis - - PV60-27D1215-13 - sample request - buy on line -
PV60-27D1215-13 60 200~1100 12,15 2 4000VAC Chassis - - PV60-27D1215-13 申请 buy on line
URF1D_QB-75WR3 75 43~160 3.3~48 1 3000VAC DIP - CE - URF1D_QB-75WR3 - sample request - buy on line -
URF1D03QB-75WR3 75 43~160 3.3 1 3000VAC DIP - CE URF1D03QB-75WR3 申请 buy on line
URF1D05QB-75WR3 75 43~160 5 1 3000VAC DIP - CE URF1D05QB-75WR3 申请 buy on line
URF1D12QB-75WR3 75 43~160 12 1 3000VAC DIP - CE URF1D12QB-75WR3 申请 buy on line
URF1D15QB-75WR3 75 43~160 15 1 3000VAC DIP - CE URF1D15QB-75WR3 申请 buy on line
URF1D24QB-75WR3 75 43~160 24 1 3000VAC DIP - CE URF1D24QB-75WR3 申请 buy on line
URF1D48QB-75WR3 75 43~160 48 1 3000VAC DIP - CE URF1D48QB-75WR3 申请 buy on line
URF1D_QB-75WHR3 75 43~160 3.3~48 1 3000VAC DIP(With heatsink) - - URF1D_QB-75WHR3 - sample request - buy on line -
URF1D03QB-75WHR3 75 43~160 3.3 1 3000VAC DIP(With heatsink) - - URF1D03QB-75WHR3 申请 buy on line
URF1D05QB-75WHR3 75 43~160 5 1 3000VAC DIP(With heatsink) - - URF1D05QB-75WHR3 申请 buy on line
URF1D12QB-75WHR3 75 43~160 12 1 3000VAC DIP(With heatsink) - - URF1D12QB-75WHR3 申请 buy on line
URF1D15QB-75WHR3 75 43~160 15 1 3000VAC DIP(With heatsink) - - URF1D15QB-75WHR3 申请 buy on line
URF1D24QB-75WHR3 75 43~160 24 1 3000VAC DIP(With heatsink) - - URF1D24QB-75WHR3 申请 buy on line
URF1D48QB-75WHR3 75 43~160 48 1 3000VAC DIP(With heatsink) - - URF1D48QB-75WHR3 申请 buy on line
URF48_QB-75WR3 75 18~75 5~48 1 2250 DIP - CE - URF48_QB-75WR3 - sample request - buy on line -
URF4805QB-75WR3 75 18~75 5 1 2250 DIP - CE URF4805QB-75WR3 申请 buy on line
URF4812QB-75WR3 75 18~75 12 1 2250 DIP - CE URF4812QB-75WR3 申请 buy on line
URF4815QB-75WR3 75 18~75 15 1 2250 DIP - CE URF4815QB-75WR3 申请 buy on line
URF4824QB-75WR3 75 18~75 24 1 2250 DIP - CE URF4824QB-75WR3 申请 buy on line
URF4848QB-75WR3 75 18~75 48 1 2250 DIP - CE URF4848QB-75WR3 申请 buy on line
URF48_QB-75WFR3 75 18~75 5~48 1 2250 DIP - CE - URF48_QB-75WFR3 - sample request - buy on line -
URF4805QB-75WFR3 75 18~75 5 1 2250 DIP - CE URF4805QB-75WFR3 申请 buy on line
URF4812QB-75WFR3 75 18~75 12 1 2250 DIP - CE URF4812QB-75WFR3 申请 buy on line
URF4815QB-75WFR3 75 18~75 15 1 2250 DIP - CE URF4815QB-75WFR3 申请 buy on line
URF4824QB-75WFR3 75 18~75 24 1 2250 DIP - CE URF4824QB-75WFR3 申请 buy on line
URF4848QB-75WFR3 75 18~75 48 1 2250 DIP - CE URF4848QB-75WFR3 申请 buy on line

* For reference only. The detailed info please refer to the datasheet.

Series
URD48xxxxD-30WR3
URD480924D-30WR3
URD480524D-30WR3
URA_LD-30WR3
URA2405LD-30WR3
URA2412LD-30WR3
URA2415LD-30WR3
URA2424LD-30WR3
URA4805LD-30WR3
URA4812LD-30WR3
URA4815LD-30WR3
URB_LD-30WR3
URB2403LD-30WR3
URB2405LD-30WR3
URB2409LD-30WR3
URB2412LD-30WR3
URB2415LD-30WR3
URB2424LD-30WR3
URB4803LD-30WR3
URB4805LD-30WR3
URB4812LD-30WR3
URB4815LD-30WR3
URB4824LD-30WR3
VRB_LD-30WR3
VRB2403LD-30WR3
VRB2405LD-30WR3
VRB2409LD-30WR3
VRB2412LD-30WR3
VRB2415LD-30WR3
VRB2424LD-30WR3
VRB4803LD-30WR3
VRB4805LD-30WR3
VRB4812LD-30WR3
VRB4815LD-30WR3
VRB4824LD-30WR3
URB_YMD-30WR3
URB4805YMD-30WR3
URB4812YMD-30WR3
URB4815YMD-30WR3
URB4824YMD-30WR3
PV75-36D15400-01
PV75-36D15400-01
HO1-P202-20D
HO1-P202-20D
URF1D_LD-40WR3
URF1D03LD-40WR3
URF1D05LD-40WR3
URF1D12LD-40WR3
URF1D15LD-40WR3
URF1D24LD-40WR3
URF1D48LD-40WR3
HO1-P102-20D
HO1-P102-20D
VRB_LD-40WHR3
VRB2405LD-40WHR3
VRB2412LD-40WHR3
VRB2415LD-40WHR3
VRB2424LD-40WHR3
VRB4812LD-40WHR3
VRB4815LD-40WHR3
VRB4824LD-40WHR3
PV40-27Bxx
PV40-27B12
PV40-27B15
PV40-27B24
PV45-29D1515-15
PV45-29D1515-15
PV45-29D1505-10
PV45-29D1505-10
PV45-29D1508-06
PV45-29D1508-06
VRB48_LD-50WHR3
VRB4803LD-50WHR3
VRB4805LD-50WHR3
VRB4812LD-50WHR3
VRB4815LD-50WHR3
VRB4824LD-50WHR3
PV50-29D1505-20
PV50-29D1505-20
URF1D_QB-50WR3
URF1D03QB-50WR3
URF1D05QB-50WR3
URF1D12QB-50WR3
URF1D15QB-50WR3
URF1D24QB-50WR3
URF1D48QB-50WR3
URF1D_QB-50WHR3
URF1D03QB-50WHR3
URF1D05QB-50WHR3
URF1D12QB-50WHR3
URF1D15QB-50WHR3
URF1D24QB-50WHR3
URF1D48QB-50WHR3
VRB24_LD-50WR3
VRB2403LD-50WR3
VRB2405LD-50WR3
VRB2412LD-50WR3
VRB2415LD-50WR3
VRB2424LD-50WR3
VRB48_LD-50WR3
VRB4803LD-50WR3
VRB4805LD-50WR3
VRB4812LD-50WR3
VRB4815LD-50WR3
VRB4824LD-50WR3
PV60-27D1215-13
PV60-27D1215-13
URF1D_QB-75WR3
URF1D03QB-75WR3
URF1D05QB-75WR3
URF1D12QB-75WR3
URF1D15QB-75WR3
URF1D24QB-75WR3
URF1D48QB-75WR3
URF1D_QB-75WHR3
URF1D03QB-75WHR3
URF1D05QB-75WHR3
URF1D12QB-75WHR3
URF1D15QB-75WHR3
URF1D24QB-75WHR3
URF1D48QB-75WHR3
URF48_QB-75WR3
URF4805QB-75WR3
URF4812QB-75WR3
URF4815QB-75WR3
URF4824QB-75WR3
URF4848QB-75WR3
URF48_QB-75WFR3
URF4805QB-75WFR3
URF4812QB-75WFR3
URF4815QB-75WFR3
URF4824QB-75WFR3
URF4848QB-75WFR3

DC/DC Converter-FAQs

How to meet the requirement for ripple & noise when using low-power converters?

Low-power converters have a higher requirement for ripple & noise which need further filtering. 

There are the following measures: 

(1) add a capacitor at the output terminal (the function of the capacitor is to further lower ripple & noise with a relatively low frequency); 

2) add a PI filter at the output terminal by filtering methods of capacitor + DM inductor + capacitor  OR capacitor + CM inductor + capacitor (this method lowers ripple & noise at the same time. If the frequency of the noise is high, it is recommended to use the pattern of capacitor + CM inductor + capacitor);

 (3) customers can choose a power module whose output voltage is one grade higher and add an LDO to reduce ripple & noise (for instance, customers practically need a 3.3V output power module but there are demanding requirements for ripple & noise. Please recommend customer to choose a 5V output power module and add an LDO to lower it to 3.3V, and the LDO can lower ripple & noise).

What are the minimum starting current and input current of a module?

The starting current of a module is generally about 1.4-1.6 times that of the Iin (max). The increase of capacitive load of the output terminal will also increase the starting current value of the module. It is recommended to select the forestage power supply with higher power. For the minimum input current in the unloading condition, please check the ‘No-load current’ section in the datasheet of the corresponding module.

The module fails to start up when the capacitive load is relatively large. How to solve it?

In practical application, the capacitive load exceeds the maximum capacitive load of operating module. In addition, when the output capacitance is extremely large, large starting current is required at the moment of start-up, resulting in the failure of starting the module.

It is recommended to decrease the connected capacitance of the output terminal or add a buffer circuit at the output terminal to improve the capacity of the module to withstand capacitive load

What problems will be caused and how to avoid them if a module starts up with an input voltage lower than the minimum rated one?

The module may be damaged when it starts up at a voltage that is lower than that of input voltage range. Because there is no under-voltage protective circuits for the wide input voltage converters. 

The starting voltage should be determined on the basis of the threshold voltage of MOSFET and soft starting circuit, and the starting voltage of the MOSFET is 2V or more lower than that of the minimum input voltage of the module.

In this circumstance, lower voltage input requires higher input current so as to supply equal power; the power module is susceptible to damage in a higher input current condition.

(1) It should be ensured that the actual input voltage is in the rated range specified in the datasheet; 

(2) it is recommended to add an input under-voltage protective circuit on the front-terminal of the module in accordance with the Wide Input Voltage DC/DC Converter Application Guide.

Why is there high noise when the fixed input voltage product is used as the power source of the relay?

There is high reflected ripple during the operation of the relay. 

It is recommended to implement some filtering measures or add a Y capacitor between the input and output grounds.

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