Micropower isolated flyback converter operates from a 3.2 V to 40 V input range and delivers up to 17 W of isolated output power. Primary-side output-voltage sampling eliminates the need for an opto-isolator or transformer third winding. The device integrates a 60 V, 3.4 A DMOS power switch with control logic in a thermally enhanced 8-lead SO package. Boundary-mode and low-ripple Burst Mode operation support high efficiency across heavy-load and light-load conditions. The specified operating junction temperature range is −40 °C to 125 °C.
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| Input voltage range | 3.2 to 40V |
| Internal power switch voltage | 60V |
| Internal power switch current | 3.4A |
| Maximum isolated output power | 17W |
| Sleep mode quiescent current | 115 typµA |
| Active mode quiescent current | 390 typµA |
| Shutdown quiescent current | 0.5 typ, 2 maxµA |
| EN/UVLO enable threshold | 1.214 typV |
| EN/UVLO hysteresis | 14 typmV |
| INTVCC regulation voltage | 3.0 typV |
| INTVCC current limit | 13 typmA |
| Minimum switching frequency | 12 typkHz |
| Minimum switch on-time | 160 typns |
| Maximum switch off-time | 170 typµs |
| Switch on-resistance | 100 typmΩ |
| Soft-start timer | 11 typms |
| Operating junction temperature range | -40 to 125°C |
| Lead Free Finish | Yes |
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User guide for the EVAL-ADPL54203-AZ, a micropower no-opto isolated flyback converter providing 5V output from 10V-28V input using the ADPL54203.
