Energy-Efficient CV/CC Switcher (Tight Output Regulation) for Very Low Cost Chargers and Adapters
Typical Standby Application


  • Energy-efficient replacement for regulated linear transformer and discrete power supply designs
  • Universal input range allows worldwide operation
  • Self-biased supply – saves transformer auxiliary winding and associated bias supply components
  • Built-in current limit and hysteretic thermal shutdown protection
  • Fully integrated auto-restart for short-circuit and open loop protection
  • Tight tolerances and negligible temperature variation on key parameters eases design and lowers cost
  • High maximum switching frequency allows very low ?ux density transformer designs, practically eliminating audible noise
  • Frequency jittering greatly reduces EMI
  • Packages with large creepage to high voltage pin
  • Lowest component count switcher solution


  • Chargers for cell/cordless phones, PDAs, digital cameras, MP3/portable audio devices, shavers etc.
  • Standby and auxiliary supplies
Output Power (Watts)
PRODUCT1230 VAC ±15%85-265 VAC
Adapter2Open Frame3Adapter2Open Frame3


  1. Packages; P: DIP-8B, G: SMD-8B. For lead-free package options, contact local sales office.
  2. Typical continuous power in a non-ventilated enclosed adapter measured at 50 °C ambient.
  3. Maximum practical continuous power in an open frame design with adeuate heat sinking, measure at 50 °C ambient.
  4. For designs without a Y acapacitor, the available power may be lower (see Key Applications Considerations).
Product Documents
Application Notesan38.pdf AN-38
Package Informationpackageinfo.pdf
Data Sheetslnk353_354.pdf LNK353-354
Reference Designs*
DAK-735.7 V, 2.4 W AC-DC Universal Unput Charger/Adapter

* DAKs/RDKs include a working power supply, sample devices, unpopulated pcb, data sheet, comprehensive engineering report, PI Expert design software and other related documentation.

Visit the Design Examples page for additional circuits using this product family.

EcoSmart® - Energy-Efficiency Technology
  • Green RoomNo-load consumption <300 mW without bias winding at 265 VAC input
  • Meets Blue Angel, Energy Star, and EU requirements