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Suitable for AIO computer power supply or high power power adapter solution

게시 된 시간 : 2020-03-12 power adapter
From this article you will know more about 400W based on STM L4984D, L6699 and SRK200A is suitable for AIO computer power supply or high power power adapter solution.

솔루션 소개

EVAL400W-ADP / ATX is a 400 W, wide input power range, power factor correction solution, suitable for high-power adapters and ATX power supplies, with extremely low power consumption during no / light load operation, without the need for a dedicated backup power supply. The application architecture is based on two phases: a front-end PFC pre-regulator based on a CCM (continuous conduction mode) boost PFC controller, using the L4984D, and a downstream LLC resonant half-bridge converter designed around the L6699 device, providing a regulated 12 V output Voltage dedicated to power ATX or similar applications that meet the most stringent efficiency and standby regulations.

The main focus of the board is light load efficiency, which is achieved through the burst mode function of the PFC and LLC controllers and the adaptive dead time of the L6699 device. It is modulated by the internal logic based on the half-bridge node conversion time, allowing the transformer magnetization inductance to be maximized To reduce the primary current during light load operation. An active high-voltage startup circuit based on a depleted MOSFET provides a very fast startup time and reduces the remaining power consumption during normal operation to negligible levels. Very high efficiency during normal load operation and very small heat sinks used on the secondary side are obtained by using synchronous rectification based on SRK2000A equipment.

Scene application diagram

Product entity diagram


Solution block diagram


Target application products



Core technology advantages

• Meets ENERGYSTAR® requirements or computer version. 6.1

• Meets EuPLot 6 Tier2 requirements for home and office equipment

• Compliant with EuropeanCoCver. 5 Layer 2 requirements for external power

Solution specifications

 Universal input supply voltage range: from 90 Vac to 264 Vac-frequency from 45 to 65 Hz

 Output voltage: 12 V ± 2% during 33 V continuous operation

 Overall efficiency at full load: More than 87% of ENERGYSTAR® 6.1 computer, in line with 80PLUS Gold Level

 Average efficiency:> 89%, according to European CoC version. 5 layers 2 for external power

 No-load power consumption: <0.15 W at 230 Vac, according to European CoC version. 5 layers 2 for external power

 Light load efficiency: European CoC version. 5 Layer 2 requirements for external power supply and EuP batch for office equipment 6 Layer 2 (Pout <500 mW = 250 V of 115 Vac and 230 Vac of 230 Vac)

 Harmonic of main power supply: Complies with EN61000-3-2 Class D and JEITA-MITI Class D

 EMI: Class B according to EN55022

 Security: Meet EN60950 standard

 RoHS Compliant

Technical Documents

Power Test Report

BOM

Schematics

Datasheet


주요 구성 요소

No. 부품 번호 회사
1 L4984D ST
2 L6699 ST