1, high voltage buck DC-DC MAX50XX or LM50XX MAX5035 Wide input voltage range: 5V to 76V, can provide up to 1A output current. encapsulationThe maximum heat dissipation capacity limits the output current. External turn-off mode is available with 10A (typical) turn-off current. The MAX5035A/B/C models offer a fixed voltage output of 3V, 5V or 12V, respectively.
2, the following two for reference. SC5832 is a domestic high current synchronous 2A chip using SOT23-5 small package. A metal-oxide-semiconductor field-effect transistor (MOSFET) with very low RDS internal resistance of 80 ho. The input operating voltage is 5V to 5V, and the output voltage is 0.6V and adjustable to 5V. 2A continuous load electricityThe stream output can ensure the stable operation of the system under various states.
3, in the world of electronics, the XL1509A is a dazzling pearl, it is a DC-DC buck switching converter designed for high voltage, high performance applications. This powerful chip displays the 2A's impressive output current capability with a constant 150KHz high switching frequency, and its wide input voltage range - from 5V to 50V - gives it the flexibility to operate in a variety of complex power environments.
4, the power chip is more famous Ling and LM these two, to 20A output, thereLM5116, LT3763, etc., you log in to their website, and then find the power controller in the buck type, the above list has voltage, current, price and other parameters. Personally feel that the lm power supply is not very good to adjust, the ripple is large, easy to hiccup.
5, if the output current is less than 1A, HB3106 can be used. Input voltage 75-40V, withstand voltage 45V, output voltage is adjustable. The periphery is simple.
Your input is sometimes lower than your output, so use a boost DCDC. If you do not consider the efficiency problem, you can boost the voltage first, increase the input 10-15v to 18v, and then reduce the voltage through the dcdc to the 15v you need. It's the easiest way to do it, but it's less efficient.
The most common DC-DC buck converters operate in switching mode, which works as follows: First, the current is input into the inductor through a switching component (such as a MOSFET). TaungkaiWhen the off component is turned on, the inductance will increase its magnetic flux, creating a high voltage difference. This voltage is then fed into a rectifier (such as a diode) for rectification. Finally, the voltage is input into the output capacitor for voltage regulation, and the output voltage after voltage reduction is obtained.
DC 15V step-down for 12V There are mainly the following methods: 1】 Series diode step-down series of 4 rectifier diodes: Vcc=15-4×0.7=12V Advantages: simple line, easy to draw materials. High output current. Disadvantages: Output voltage is directly affected by power supply voltage fluctuations.
Principle of dcdc Buck chip A DC-DC buck chip is a circuit that converts the input voltage to a lower output voltage. It usually consists of an adjustable oscillator, an amplifier, a filter, and an output control circuit.
DC/DC power supply2, in the world of electronics, the XL1509A is a shining pearl, it is a DC-DC buck switching converter designed for high voltage, high performance applications. This powerful chip displays the 2A's impressive output current capability with a constant 150KHz high switching frequency, and its wide input voltage range - from 5V to 50V - gives it the flexibility to operate in a variety of complex power environments.
3, Wide voltage DC-DC buck power module circuit diagram Single DC-DC buck power module, the input voltage can reach 90 ~ 100V, but the output current of this type of power module is generally not large, basically within 1A. If you want a power module with a wide input voltage range and large output power, you can choose the LM2596HV high-voltage power module, whose input voltage is up to 60V, and the maximum output current is 3A. 4, recommend a high voltage buck DC/DC chip: XD308H, its basic parameters are: input voltage range 18-600VDC, output current 500mA, can output a single voltage: 3V, 5V, 12V, 24V and so on.
Single-chip DC-DC buck power module Wide voltage dcdc buck chip , the input voltage can reach 90 ~ 100V Wide voltage dcdc buck chip , However, the output current of this type of power module wide voltage dcdc buck chip is generally not large, basically within 1A. If you want a wide input voltage range and a large output power Wide voltage dcdc step-downChip power module, can choose LM2596HV high voltage power module, the input voltage up to 60V, the maximum output current is 3A.
The principle of the wide voltage circuit board is as follows: the multi-turn potentiometer on the circuit board is a voltage regulator, and adjusting its value can make the output voltage change in the range of 2 ~ 30V. The buck IC of the power module adopts TO-263 package, which is directly welded TO the PCB board, and relies on the copper foil of the PCB board to dissipate heat. The module is hot when the working pressure difference and the load current are large, so the output current of the module should not be too large.
InputWide voltage principle The wide voltage principle means that in the output voltage range, the greater the voltage change rate, the wider the output voltage. It is a voltage regulation technology that can improve the output voltage range of the power supply, thereby improving the stability and reliability of the power supply. Its principle is that when the input voltage changes, the circuit will automatically adjust the output voltage to keep it in a wide range, thereby improving the stability and reliability of the power supply.
1, can inhibit the input voltage disturbance, but due to the maximum operating current of the regulator, while the output voltage can not be arbitrarily adjusted, so the circuit is suitable for the output voltage does not need to be adjusted, the load current is small, the requirements are not high occasions, the circuit is commonly used for the power supply voltage requirements are not high chip power supply.
2, BP2822 is a high precision LED constant current control chip, used in non-isolated buck type LED power supply system, suitable for a full range of AC voltage input or 12 ~ 600V DC voltage input. Package form is DIP8 plastic seal, 1Pin is ground, pin 2 is the line voltage compensation input end, pin 3 is the power supply end, pin 4 is the internal high voltage MOS tube source, pin 6 is the internal high voltage MOS drain, pin 8 is the current sampling end.
3, the following two for reference. SC5832 is a domestic high current synchronous 2A chip using SOT23-5 small package. A metal-oxide-semiconductor field-effect transistor (MOSFET) with very low RDS internal resistance of 80 ho. The input operating voltage is 5V to 5V, and the output voltage is 0.6V and adjustable to 5V. The continuous load current output of 2A ensures the stability of the system in all statesRun.
4, can use SG3525A, SG3527A, KA3525A, TL494 and so on. DCDC represents a DC power supply, such as a dry battery or a car battery. The 220V power supply for home use is an AC power supply. If a converter can convert one DC voltage (0V) into another DC voltage (5V or 0V), this converter is called a DC/DC converter, or called a switching power supply or switch regulator.