All elements in medical, industrial, electric tools, and household appliances, etc. are very clear that electromagnetic interference (EMI) is largely inevitable. According to experience, as the switch mode converter is improved, inhibition EMI becomes more difficult. One suggestion is to reduce the needs of suppression by designing component of less EMI. As is known by the engineer, EMI is a phenomenon that an electronic device is subjected to another impact of another device that is generating electromagnetic fields, ie the stray energy in the radio frequency (RF) spectrum. At system level, it is not easy to know how much interference will generate, or how local interference affect its own subsystem. We can start from choosing a component that produces low EMI, which can greatly help overcome the relevant design challenges, when designing a buck converter, low EMI becomes more and more important. .
To this end, Dal Technology Diodes Incorporated has developed a series of low EMI converters that enable engineers to design EMI to reduce its design in the switch mode power conversion. By using a more efficient switching device, it is also easier to reduce calories and make developing more compact devices. The low EMI buck converter is ideal for many applications, from the network system to power tools, laser printers, medical, industrial power supplies, and 12V / 24V distributed power bus power, and consumption for high-efficiency converters that require FPGA, DSP and ASIC Electronic product consumables. The low EMI buck converter is also available for home audio systems, gaming machines, white appliances and small appliances, flat-screen TV / displays and set-top boxes.
Darie Technology's AP63200 is a 2A synchronous step-down converter, the input voltage ranges from 3.8V to 32V, supports 5V, 12V, and 24V power input, and can withstand the surge in surge input 40V, 400ms. It is designed to provide first-class EMI performance and ultra low static current. Controlled by peak current mode is easy to use, minimizing the number of external components. It also integrates high-end 125MΩ and low-end 68MΩ MOSFET to support efficient antihypertensive DC-DC conversion. The entire product line includes a function that helps EMI to minimize when designing switch mode PSU. These include Frequency Spread Spectrum, which is ± 6% of the switching frequency, and the EMI is lowered by the energy that is not allowed to be transmitted in any of any significant time. They also have a proprietary gate driver scheme, which can resist the rings of the switch node without sacrificing the MOSFET conduction and shutdown, which also eliminates high-frequency radiation EMI noise caused by the MOSFET switch.
Saving energy in today's society, for the average person, if the conversion efficiency of home electrical appliances is higher, it is quite considerable to save electricity in long-term sunshine. Therefore, the power consumption voltage of the IC itself is also a focus of improving electricity. The AP6320x series has an ultra-low 22UA static current, and the efficiency is as high as 80% at a light load of 1 mA, and the efficiency of 5mA light load is as high as 88%, the adjustable low voltage lockout (UVLO) to increase design flexibility, and?? Optimization Pin OUT, minimizes the AC switching current loop to minimize systemicity. In particular, the AP63203 and AP63205 units are fixed output buck converters, which have the best design in low EMI, because the simpler PCB layout design reduces the number of external components required, and ensures that the current circuit on the PCB is short, resulting EMI problem is less likely. The fixed 3.3V and 5V output option further reduces the number of external components. Obviously, by understanding the root cause, the best solution can be designed to reduce the EMI of the switching power supply.
► Scene application map
► Product entity
► Present photo
► Forum block diagram
► Circuit diagram
► EVB BOM
► Efficiency measured VIN = 24V, VOUT = 12V
► Frequency Frequency (FSS) with a switching frequency Jitter of ± 6%
► HICCUP MODE PROTECTION
► Core technology advantages
Ultra-low (22μA) quiescent current (IQ)
2. Wide output voltage range: 0.8V to 100% close to VIN (LDO mode)
3. Frequency 6% is designed for EMI performance
4. Adjustable low voltage lock UVLO
5. Can be affected by surge input voltage 40V / time 400ms
6. Internal integrated high-end 125MΩ and low-end 68MΩ MOSFET
7. Provide a variety of protection mode: overvoltage protection / overcurrent protection / overheating protection
8. Tsot26 small packaging simple design
► Scenario specifications
1. Enter the power supply 3.8V to 32V.
2. 2 ampere continuous output current design
3. Light load frequency conversion mode (PFM)
4. 0.8V ± 1% reference voltage VREF
5. 500kHz operating frequency
6. Under 1 mA, efficiency is as high as 80%
7. Under 5mA, efficiency is as high as 88%
8. ESD: HBM 2KV / CDM 1kv
9. Work temperature: -40 ~ 85 degrees C
Sourceful from big.
Our other product:
