On June 8, 2021, the leading semiconductor components distributors dedicated to the Asia-Pacific market - Dachang Capital Holdings announced that their friend is launching the high-power power adapter based on the integral semiconductor (ST) L6563H + L6599A + SRK2000A Program.
Distill 1 - Dacai Dadye launches high-power power adapter program product entity based on ST products
The function of consumer electronics is growing under people 's continuous exploration, and its performance has also been greatly improved, so the power of such products such as TV, computer, and game consoles is also gradually increased, so a high performance, highly reliable power supply Products have become the hot demand of the market. The high-power power adapter scheme launched by Daba Dad is still a PFC + LLC topology, which is suitable for use as a medium-high power supply.
Figure 2 - Dalian big friends launch ST product-based high-power power adapter schedule board diagram
The ST schemes used in the scheme L6562 / L6563 + L6599 are known as the most classic PFC + LLC scheme, which is widely used. The main advantages of the solution are high efficiency, low EMI, suitable for high frequency, high power density design. DEMO board EVL150W-ADP-SR is a 150W, wide input voltage range, PFC + LLC solution, with low power consumption when there is no / light load, with high efficiency characteristics, suitable for high power Adapter, TV power supply and LED high power power supply. Before the LLC topology is not popular, traditional 150W solutions mainly have PFC + flying or PFC + north, and its main disadvantages are not high efficiency. This solution is based on two levels: the pre-stage uses L6563H, is the front-end PFC pre-regulator of the CRM (critical conduction mode) boost PFC controller, the late stage is a LLC resonant half bridge converter based on the L6599 device, the DEMO board Provides output 12v12.5a, standby power consumption satisfies the six-level energy efficiency requires less than or equal to 0.2W, and the average efficiency is easily satisfied with the six-level energy efficiency is greater than or equal to 88%. Very high efficiency during normal load operations and very small heat sinks used in the secondary side are obtained by using SRK2000A devices based on synchronous rectification.
Figure 3 - Daba Dadye launches high-power power adapter schema block diagram of ST products
Daba Dadhang Group launched a significant advantage of the main devices used by the high-power power adapter scheme based on ST products:
L6563H - 700V high pressure start, TM critical conduction mode; remote on / off control, cascade PWM controller interface; with the boost function, fast "two-way" input voltage feedforward function; accurate output overvoltage protection, feedback Circuit opening protection, inductance saturation protection; with -600 / + 800mA Totem Pillars driven. The advantage is that the function is rich, compared to similar chips, which has followed boost function, and has input voltage feedforward functions, which can achieve lower THD, faster dynamic response.
L6599A - 50% duty cycle, fixed dead zone, resonant half-bridge frequency conversion controller, high to 500 kHz operating frequency; two-stage overcurrent protection, frequency conversion and shutdown, with interface with PFC controllers; light load pulse work Mode, power / power down order or undervoltage protection; two gate drivers provide an output current 0.3a and a peak current driving capability of 0.8A.
SRK2000A - Secondary Synchronous Rectifier Controller, operating frequency up to 500kHz; double gate driver has 1A push and 3.5a pull current power; working intelligence to sleep to sleep mode when light load.
Core technical advantage:
PFC integrated high pressure start and input undervoltage detection protection circuit;
PFC fast voltage feedforward;
The biggest advantage of LLC: high efficiency, low EMI, suitable for high frequency;
The LLC converter is open, and the output diode ZCS is turned off, no reverse recovery problem;
Small switching loss, suitable for high frequency, high power density design;
LLC line voltage undervoltage and overvoltage protection;
LLC overcurrent OCP and short-circuit SCP protection OLED display, voice broadcast, Chinese and English switches, etc.
Solution specifications:
Universal input supply voltage range: from 90VAC to 264VAC-frequency from 45Hz to 65 Hz;
Output voltage: 12.5A is 12V ± 2% in continuous operation;
Overall efficiency at full load: AC115V - Full load efficiency is 91.8%, AC230V-efficiency is 94%;
Average efficiency: "89%, can meet the six energy efficiency requirements of Europe";
No load power consumption: The standby power is ≤0.2w when the AC115V and 230V voltage input;
Main power harmonics: in accordance with EN61000-3-2d class and Jeita-Miti D class;
EMI: According to EN55022 B;
Safety: Compliance with the EN60950 standard, in line with the ROHS standard. Read more
Our other product:
