FTM Board Club
STMicroelectronics
EVLCMB1-90WADP
19 V - 90 W adapter based on the STCMB1, TM PFC and HB LLC combo controller

The EVLCMB1-90WADP demonstration board is a 19 V - 90 W converter, tailored for the typical specification of an ac-dc adapter for laptops and notebooks, with a wide input mains range and very low power consumption at the light-load.

The architecture is based on a two-stage approach: a front-end transition mode PFC pre-regulator and a downstream LLC resonant half-bridge converter; the PFC and LLC are both integrated in the STCMB1 combo IC.

Features
  • Universal input mains voltage range: from 90 V ac to 264 V ac- frequency from 45 to 65 Hz
  • Output voltage: 19 V, 4.75 A continuous operation
  • Average efficiency: > 90%, according to European CoC ver. 5 Tier 2 for external power supplies
  • Efficiency > 60% with Pout = 250 mW, according to EuP lot 6 Tier 2 for household and office equipment
  • No load mains consumption: < 80 mW at 230 V ac, according to European CoC ver. 5 Tier 2 for external power supplies
  • Mains harmonics: meets EN61000-3-2 Class-D and JEITA-MITI Class-D
  • EMI: according to EN55022 Class-B
  • Safety: meets EN60950 standards