1, AC-DC conversion chip: responsible for converting alternating current to direct current, such as the chip used in the aforementioned power adapter or power module. DC-DC conversion chip: Includes various forms of converters, such as Buck (Buck) converter, Boost (Boost) converter, and buck-boost (Buck) converter chip.
2, commonly used power management chipsHIP630IS653RT923ADP316KA7500, TL494, etc. The following will detail the main types of power management chips, and illustrate four common power management chips. The main type of power management chip Voltage regulator: A voltage regulator is one of the most basic power management chips and is used to convert an input voltage into a stable output voltage.
3, this kind of chip model is TPS6108SGM4151 and so on. The TPS61085 is a high efficiency boost converter with an input voltage range of 5V to 12V and an output voltage range of 5V to 12V8V to 15V, the maximum output current is 2A, with low power consumption, high efficiency and stable output characteristics. The SGM4151 chip is a highly efficient power management chip for portable devices and low-power applications in battery-powered devices.
SX1308, a high-performance sharpe designed for small, low-power applications, offers unprecedented flexibility in your circuitry thanks to its compact 6-pin SOT23 package. Operating frequency locked at 2MHz, allowedYou can easily integrate low-cost capacitors and inductors with a height of only 2mm to maximize space utilization.
V-2V boost to 12V2A, the pressure difference is relatively large, it is recommended not to directly boost the pressure. Domestic chip XL6007 can try. Check out TI's webench tool. Figure 1 shows a simplified inductive DC-DC converter circuit where closing the switch causes an increase in current through the inductor. Turning on the switch causes current to flow through the diode to the output capacitor.
It is recommended that you choose NCP1400ASN50, which is a boost type switch regulatorThe input voltage range is 0.8V~ 5V, the output voltage is constant 5V, and the maximum output current is 100mA.
This model is a synchronous booster chip, saving the external Schottky diode, there is no diode on-voltage drop, the efficiency can be high, from the internal block diagram we can see that the input current from the inductor through the LX pin through the internal field effect tube output, and ordinary booster chip compared, the upper two mos tubes instead of Schottky diode. The output current can be cut off through the upper two MOS.
indicates that the turn ratio of your magnetic core transformer is too high, increasePerformance.
2, ICL7660 is a low-power polarity reversal power converter produced by Maxim Company. The integrated circuit is completely consistent with the internal circuit and pin function of TC7662ACPA and MAX1044, and can be directly replaced.
3, MAX5035: Input: 5V to 76V, output: 3V, 5V, 12V current 1A 2) PE-12V-B4: Input DC15-380V, output 12V 150mA; 3) PI-05V-B4: Input DC13-380V, output 5V200mA; 4) PI-3V3-B4: Input DC13-380V, output 3V 200mA.
4, the patch 38XX series has a 14-pin package. With 3843,3845 can do 12v L 500V output Dc/Dc. Isolation can not be isolated, do not need electric manifold output to do N times double voltage, transformer winding simple.
1, this chip is cheap and very practical low-cost DC/DC converter 340634063 is widely used because it is cheap, the peak switching current reaches 5A, the circuit is simple and the efficiency meets the general requirements. In ADSL applications, the switching frequency of 34063 has a great impact on the transmission rate, which needs to be carefully considered in the selection of components and PCB design.
2, this process will change the way the doping region conducts electricity, so that each transistor can be on, off, or carry data. Simple chips can use only one layer, but complex chips usually have many layers, and this process is repeated repeatedly, and different layers can be connected by opening a windowGet up. This is similar to the production principle of multi-layer PCB board.
3, BT series of booster star to BT100BT1002 and BT1003 represented by the DC-DC booster IC family, with its unique specifications to attract the attention of engineers. For example, the BT1004 to BT2014 series of chips have a low starting voltage, starting from 0.8V, can adapt to a wide input range of 0.8V to 7V, the output voltage is adjustable, from 2V to 7V, and the current output can reach 300mA to 1000mA.
4, V-2V to 12V2A, the pressure difference is relatively large, it is recommended not to directly boost the pressure. Domestic chip XL6007 can try. Check out TI's webench tool. Figure 1 shows a simplified inductive DC-DC converter circuit where closing the switch causes an increase in current through the inductor. Turning on the switch causes current to flow through the diode to the output capacitor.
Common dcdc booster chip list There are many dcdc booster chip list , below I recommend a few for RF circuit and very low noise chip: MAX1907AETL: This is a high-efficiency, miniaturized DC-DC boost converter dcdc boost chip list , operating voltage range 5V to 16V, output voltage 28V, maximum output current up to 5A. It is characterized byHigh efficiency, small size, wide input and output voltage range, and low system noise.
Radio Frequency (RF) is an abbreviation of radio frequency, indicating the electromagnetic frequency that can be radiated into space, and the frequency range is between 300KHz and 300GHz. RF for short RF is RF current, it is a kind of high-frequency AC change electromagnetic wave for short. Alternating current that changes less than 1000 times per second is called low-frequency current, and frequency current that is greater than 10,000 times is called high-frequency current, and radio frequency is such a high-frequency current.
Aggregates basic circuit diagram symbols, for example: Batteries, ground wires, diodes, etc., can meet the drawing needs of basic circuits. The basic circuit symbol is used to connect the components and play the role of "bridge interworking". Basic integrated circuit components represented by registers, converters and counters are more common in circuit diagrams. Used to represent the properties of a circuit, such as pulse, material, temperature, etc.
Because most of the radiation is generated by common-mode voltage and current, and because most of the electromagnetic interference in the environment is generated by common-mode problems, it would be good to use a balanced transmit and receive (differential mode) technique in analog circuitsEMC effect and reduce crosstalk. Balanced circuit (differential circuit) drivers do not use the 0V reference system as the return current loop, so large current loops can be avoided, thereby reducing RF radiation.
1, the DC/DC power chip is mainly through the comparison of the feedback voltage and the internal reference voltage, so as to adjust the duty cycle of the driving waveform of the MOS tube to ensureStability of output voltage. Synchronous rectification technology Because there will be some tube voltage drop when the diode is switched on, the power consumed by the continuous current diode will become the main power consumption of the DC/DC power supply, which seriously limits the efficiency improvement of the DC/DC power supply chip. 2, in-depth analysis: The cornerstone and core working principle of DC/DC converter DC/DC converter, this electronic magician, dedicated to direct current from one voltage level to another, its existence makes the power world more flexible and efficient. It consists of a control core - the control chip, supplemented by inductors, diodes, triodes andCapacitors and other components, each component plays an indispensable role.
3, the working principle, DC-DC power supply through the switching element to achieve voltage conversion, including three key steps: filtering, conversion and regulation. The filter eliminates the input voltage pulsation, the converter uses the switching element and the energy storage element to form a pulse, which is converted into the required voltage through the transformer and the rectifier circuit, and finally ensures the stability of the output voltage through the feedback mechanism.
4, DCDC converter is a key device, it will direct voltage or current (through control! -- Chip, inductor, diode, threeComponents such as tubes and capacitors) convert to high-frequency square wave voltage or current. Its working principle mainly involves three steps: first, the input direct current into a high frequency signal, and then through the rectifier processing, and finally output the required DC output voltage.
5, isolated and non-isolated: isolated DC/DC switch IC such as L4960 is suitable for AC-AC conversion, providing security isolation, non-isolated chip such as L29LM2576 each has its own unique features. Single-ended flyback controller: UC3842 and other single-ended flyback controllers, built by boosting chopper and isolation transformer, need to pay attention to the design of electricitySource priority and compatibility.