Output RectificationIn offline SMPS, the output stage delivers the required DC voltage to the load. The power components used in this stage are Schottky diodes, ultra-fast diodes, and, in the case of synchronous rectification, low gate charge and low RDS(on) power MOSFETs.
Up to 24V output, synchronous rectification MOSFETs offer the best efficiency, particularly at lower output voltages, while Schottky diodes are an economical high performance solution. At voltage levels higher than 24V, ultra-fast diodes offer superior performance with lower conduction and switching power losses.
Synchronous Rectification MOSFET
Designers have turned to application-optimized synchronous rectification MOSFETs to increase efficiency for lower output voltages. Low gate charge and low RDS(on) MOSFET can reduce conduction and switching losses by up to 20%.
Synchronous Rectification MOSFET Product Selector Guide
Schottky Diodes
Lambdaaa offers one of the broadest lines of Schottky rectifiers available in the industry. Lambdaaa’s Schottky packaging ranges from surface mount and axial lead types with ratings of a few amps, to large dual die modules rated in excess of 400 Amps.
Schottky Diodes Selector Guide
Ultrafast Diodes
Lambdaaa’s ultra-fast diodes offer ultra-soft recovery and have low forward voltage drop and reverse leakage, critical parameters which reduce conduction and switching losses. The ultra-soft recovery also minimizes radiated electrical noise and eliminates the risk of voltage spikes that can damage the diode or other components.
Ultra-fast Diode Product Selector Guide
Select the Schottky and ultra-fast diodes for your non-synchronous output rectification applications based on the power level.
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|
AC/DC Converter Output Current Rating by Power Level |
|
Dominant Topology |
Flyback |
Flyback/
SEF |
Single Ended Forward(SEF) |
SEF/DEF |
Double Ended Forward(DEF) |
Full Bridge/
DEF |
Full Bridge |
|
Power Range |
11-50W |
50-100W |
101-250W |
251-500W |
501-750W |
751-1000W |
Above 1000W |
Power Supply Output Voltage |
Output Rectifier Typical VRRM |
|
2V |
15-20V |
19TQ015
20L15T |
40L15CW
65PQ015 |
85CNQ015
100BGQ015
125NQ015 |
185NQ015 |
185NQ015
245NQ015 |
185NQ015
245NQ015 |
185NQ015
245NQ015 |
3.3V |
20-25V |
– |
– |
80CPQ020
87CNQ020
82CNQ030
72CPQ030 |
80CPQ020
87CNQ020
82CNQ030
72CPQ030 |
242NQ030
182NQ030
100BGQ030 |
301CNQ045
175BGQ030 |
440CNQ030
175BGQ030 |
5V |
30-45V |
MBR1045 |
MBR2045CT
MBR3045WT
MBR2545CT |
MBR6045WT
72CPQ030
40L45CW |
MBR6045WT
72CPQ030
40L45CW |
100BGQ045
MBR6045WT
182CNQ030 |
242NQ030
100BGQ030 |
242NQ030
100BGQ030 |
12V |
100V |
8TQ100 |
16TQ100 |
MBR20100CT
16TQ100 |
43CTQ100 |
43CTQ100
40CPQ100
83CNQ100 |
123NQ100
100BGQ100 |
123NQ100
100BGQ100 |
15V |
100V |
31DQ10 |
8TQ100 |
MBR20100CT
16CTQ100 |
43CTQ100 |
43CTQ100
40CPQ100
83CNQ100 |
43CTQ100
40CPQ100
83CNQ100 |
123NQ100
100BGQ100 |
24V |
150-200V |
– |
MURD620CT
MUR820 |
MUR820
MUR1620CT
MUR1520 |
MUR3020WT |
MUR3020WT
60EPU02 |
80EBU02
60EPU02 |
80EBU02 |
48V |
200-400V |
– |
– |
8ETH03
8ETU04 |
8ETU0415ETH03
16CTU04 |
30CPH03
30EPH03
30CPU04 |
60EPU04 |
80EBU04
60EPU04 |
> = 48V |
200-400V |
– |
– |
HFA08TB60 |
HFA15TB60 |
HFA30TA60C |
– |
– |
Technical Information
Ultra-fast Recovery Diodes Meet Today’s Requirements for High Frequency Operation and Power Ratings in SMPS Applications(in .pdf format)
Contact your Local Sales Rep or our Technical Assistance Center for further information.
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