EVL400W-EUPL7

EVL400W-EUPL7 12 V - 400 W adapter based on L4984, L6699 and SRK2001 Data brief  No load mains consumption: < 150 mW at 230 Vac, well below European CoC ver. 5 Tier 2 limit for external power supplies  Mains harmonics: meets EN61000-3-2 ClassD and JEITA-MITI Class-D  EMI: according to EN55022 Class-B  Safety: meets EN60950 standards  RoHS compliant Description Features  Universal input mains voltage range: from 90 Vac to 264 Vac – frequency from 45 to 65 Hz  Output voltage: 12 V at 33 A continuous operation  Overall efficiency at full load: > 89%, according to ENERGY STAR® 6.1 limit for computers  Certified as 80Plus PLATINUM level at 115 Vac and GOLD level at 230 Vac in the CLEAResult Plug Load Solutions website(1)  Average efficiency: > 89%, according to European CoC ver. 5 Tier 2 for external power supplies  Efficiency at 250 mW > 50%, well above EuP lot 6 Tier 2 limit for household and office equipment The EVL400W-EUPL7 demonstration board is a 12 V - 400 W converter, tailored for the typical specification of an AC/DC adapter with wide input mains range, very low power consumption at light load and good average efficiency. The architecture is based on a two-stage approach: a front-end PFC pre-regulator based on a CCM (continuous conduction mode) boost PFC controller using the L4984, and a downstream LLC resonant half-bridge converter, designed around the L6699. At the secondary side, synchronous rectification is implemented by means of the SRK2001 that assures a very high rectification efficiency with consequent small Heat Sink required. The PFC section uses a proprietary LM-FOT (line-modulated fixed-off-time) that allows control methodology at fixed frequency operation for boost PFC converters as long as its operating in CCM. The LLC section uses the L6699, a double-ended controller specific to series-resonant half-bridge topology. The output voltage regulation is obtained by modulating the operating frequency. 1. CLEAResult Plug Load Solutions site is owned and maintained by CLEAResult - the largest provider of energy efficiency programs and services in North America: https://www.plugloadsolutions.com/80PlusPowerSupp liesDetail.aspx?id=238&type=4 December 2019 The main focus of this demonstration board is the light-load efficiency, achieved through the burst mode function of both PFC and LLC controllers with the self-adaptive deadtime of the L6699, modulated by the internal logic according to the DB3795 Rev 3 For further information contact your local STMicroelectronics sales office. 1/13 www.st.com EVL400W-EUPL7 half-bridge node transition times, which allows the maximization of the transformer magnetizing inductance, reducing the primary current at light load operation. An active high voltage start-up circuitry based on a depletion MOSFET provides a very fast start-up time and minimizes the residual consumption during normal operation to a negligible level. 2/13 DB3795 Rev 3  & Q