“The leading semiconductor component distributor dedicated to the Asia-Pacific market, Dalian General Holdings, announced that its subsidiary Youshang has launched a complete solution of 750W high-efficiency communication power supply based on ON Semiconductor and US Core Source (MPS) products.
On August 17, 2021, Dalian General Holdings, a leading semiconductor component distributor dedicated to the Asia-Pacific market, announced that its subsidiary Youshang has launched a 750W high-efficiency 750W based on ON Semiconductor and MPS products. A complete solution for communication power.
Figure 1 – Dalian Dayoushang’s Display board for communication power solutions based on ON Semiconductor and MPS products
The rapid development of communication construction has brought great business opportunities to the switched-mode power supply (SMPS) industry, but at the same time it has also brought new challenges to communication power supply designers. At present, most of the communication data centers and large base stations use the method of expanding the capacity of the existing equipment to build new communication equipment. Therefore, the space for the power supply cabinet for the power required by the new communication is often extremely limited. The output power is greatly increased while keeping the volume basically unchanged, that is, the power density is improved.
The communication power solution launched by Dalian Dayoushang this time uses ON Semiconductor NCP1618 control chip in the front-end PFC part. The chip can provide a variety of working modes: when Tcycle is less than the operating frequency of Tclamp, the circuit works in DCM; when Tclamp is greater than Tcycle and less than the operating frequency of TCCM, the circuit works in CRM mode; when Tcycle is greater than 120% * TCCM operating frequency When the circuit works in the CCM working mode, this working mode can better optimize the circuit structure and power consumption.
Figure 2 – Block diagram of the communication power supply scheme of Dalian Dayou Shang based on ON Semiconductor and MPS products
In the DC/DC part of the latter stage, this solution uses ON Semiconductor NCP13992 control chip. NCP13992 is a high-efficiency current mode controller, which can realize 600V gate-level control, which can simplify the layout and reduce the number of external components. High efficiency and lower light load energy consumption. In addition, NCP13992 can directly drive GaN Fet devices, contributing to higher conversion efficiency and higher power density. Not only that, the NCP13992 also provides a complete set of protection functions for safe operation in any application.
In addition, the secondary side of the transformer adopts MP6924 control chip of MPS. MP6924 is an SR controller, which can realize 2-way drive control, which greatly optimizes the circuit and design difficulty. Its unique shutdown control algorithm can greatly Improve the efficiency of the entire product.
Figure 3-Scenario application diagram of Dalian Dayoushang’s communication power solution based on ON Semiconductor and MPS products
Core technical advantages:
• NCP13992 features:
High frequency operation: 20 kHz to 750 kHz;
Quiet Mode Technology;
Current mode control mechanism;
Automatic failure time with maximum aging time clamp.
• NCP13992 advantages:
Improve light load efficiency and avoid transformer noise;
Built-in safety protection to improve transient response;
• NCP13992 application:
Half-bridge resonant converter;
Offline power supply;
LCD, LED and OLED TVs;
High power AC/DC adapter;
Industrial and medical power supplies;
computing power supply;
Lighting power supply.