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.

The PFC section uses a proprietary constant on-time control methodology that does not require a sinusoidal input reference, thereby reducing the system cost and external component count.The LLC section is based on a proprietary time shift control method, with simple compensation, that improves the dynamic behavior and input ripple rejection resulting in a cleaner output voltage bringing advantages to the circuitry placed to the SMPS secondary side.

The STCMB1 device also embeds a high voltage start up generator, an x-capacitor discharge circuit and a complete set of protections. These features are fully exploited in the EVLCMB1-90WADP device to make a robust and safe SMPS, while keeping a reduced external component count.

The EVLCMB1-90WADP device is characterized by very high efficiency at the light loads that comes from the combination of the design and selection of the power components and the innovative burst mode management functions integrated in the STCMB1, including a proprietary IP that allows minimizing the number of cycles in the burst packet and so minimizing the switching losses.

Key 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
  • RoHS compliant
Product Specifications
DescriptionVersionSize
DB2886: 19 V - 90 W adapter based on the STCMB1, TM PFC and HB LLC combo controller1.0128 KB
Board Manufacturing Specifications
DescriptionVersionSize
EVLCMB1-90WADP gerber files1.0147 KB
Bill of Materials
DescriptionVersionSize
EVLCMB1-90WADP BOM1.0101 KB
Schematic Packs
DescriptionVersionSize
EVLCMB1-90WADP schematic1.091 KB
License Agreement
DescriptionVersionSize
Evaluation products license agreement1.0125 KB
Sample & Buy
Part NumberCore ProductUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
EVLCMB1-90WADPSTCMB1--NECEAR99-
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
EVLCMB1-90WADPCARDIndustrialEcopack1
19 V - 90 W adapter based on the STCMB1, TM PFC and HB LLC combo controller EVLCMB1-90WADP
19 V - 90 W adapter based on the STCMB1, TM PFC and HB LLC combo controller EVLCMB1-90WADP
19 V - 90 W adapter based on the STCMB1, TM PFC and HB LLC combo controller EVLCMB1-90WADP
19 V - 90 W adapter based on the STCMB1, TM PFC and HB LLC combo controller EVLCMB1-90WADP
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2