Diodes Incorporated

Demoboard AP3917D EV2

Dual Output Off-Line Buck + Fly-back Power Solution

Topologie: Buck
Eingangsspannung (min.): 85.00 V
Eingangsspannung (max.): 264.00 V
Ausgang 1: 18.00 V / 0.250 A

Erstveröffentlichung am 14.10.2019, Version 1 vom


AP3917D is an off-line universal AC Voltage input step-down regulator that provides accurate constant voltage (CV), outstanding low standby power, light loading efficiency and dynamics performance. The chip supports non-isolated buck and buck-boost topology, and also isolated flyback topology. The main applications are for cost-effective home appliance power. Working with a single winding inductor and integrating a 700V MOSFET when used in buck topology, the BOM cost is very low. The AP3917D EV2 Evaluation Board contains two outputs specifications: 18V250mA and 5V50mA, with both non-isolations. The 18V250mA is buck topology and the other is flyback. The two topologies share a two-winding transformer. The feedback circuitry samples 18V output. The user’s guide provides good design example for dual output power applications in home appliance power.


  • Universal 85V to 264V VAC Input
  • Internal MOSFET 700V (Rds(on) 10Ω max. @25℃)
  • Maximum output Current: 370mA typ.@5V output
  • Low Standby Power Consumption
  • High Light Loading Efficiency and average efficiency can meet DOE IV and CoC V5 Tier 2
  • Frequency Modulation to suppress EMI to meet EN55032 and FCC part 15 class B
  • Rich Protection including: OTP, OLP, OLD,SCP
  • Extremely low system component count.
  • Totally Lead-free & Fully RoHS Compliant (SO-7)
  • Halogen and Antimony Free. “Green” Device


  Artikel Nr. SPEC Produktserie L
RDC max.
RDC typ.
(V (DC))
Betriebstemperatur P
Technische Artikelnummer Muster
7447462681 PDF WE-TI Tonneninduktivität 680 0.25 3.7 3.094 2.4
860020474014 PDF WCAP-ATG5 Aluminium-Elektrolytkondensatoren 470 25 117.5 14 410 -40 °C up to +105 °C 3.5 8 11.5 ATDE115471M025DSPA7B000
860080373007 PDF
860021374008 PDF WCAP-ATG5 Aluminium-Elektrolytkondensatoren 4.7 400 56.4 15 48 -25 °C up to +105 °C 3.5 8 11.5 ATJE1154R7M400DSPA7B000