The main power management chips are dual-in-line chips, and some are surface-mount packages, among which HIP630x series chips are more classic power management chips, designed by the famous chip design company Intersil.
SGM4151, the chip is a high-efficiency power management chip for portable devices and low-power applications for battery-powered devices.
Common power management coreHave HIP630IS653RT923ADP316KA7500, TL494, etc.
Patch 38XX series comes in a 14-pin package. With 3843,3845 can do 12v L 500V output Dc/Dc. Isolation or not is fineDo not need electric manifold output to do N times double voltage, transformer winding is simple.
DC booster chip usually has PWM, PWF and charge pump three kinds.
The best way, 12V DC inverter into AC rectifies output 200V DC power supply.
TPS60310, its input voltage range 0... 9V~8V, output 3V.
1, should be BAT754S, this is a double Schottky diode from the printing word 2NW can also be judged: BAT754S MARKING is 2N, W represents the origin.
2, SOT23 package of chip triode mark LQW, this is TL431AMSDT, is a three-terminal adjustable shunt reference voltage source chip, through the peripheral circuit Settings, can be set from Vref (5V) to 36V range of any value.
3, V-2V boost to 12V2A, the pressure difference is relatively large, it is recommended not to directly raiseBuck converter, Boost converter, and buck-boost converter chip. Battery management chips: Include chips that provide charge control, battery protection, and charge detection for lithium batteries and other rechargeable batteries.
3, 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.
MC34063, (with in-line and patch) This is the best chip I can think of for beginners. The advantage is that the circuit is simple and the peripheral elements are reduced.
, charging BaiDC-DC boost circuit: The DC-DCboost circuit uses the MAX1771 integrated chip, which can maximize the release of lithium within a safe rangeThe capacity of the core achieves the purpose of supplying power to various digital devices. Lithium core capacity indicator circuit: Lithium core capacity indicator circuit is composed of XC61CC series voltage monitoring chip.
This I do, can not charge for the mobile phone interference, voltage and current can meet, 34063 circuit I also do a small current charging slow maximum 500 ma.
FeedBack potential is 22V, output voltage VOUT = 22V (1 R1/R2). When a single alkaline 5V or nickel electrical input is used and the output voltage is 5V, the output current can provide a maximum value ofAbout 100mA, if the load continues to increase, the output voltage will be significantly reduced, and the efficiency is low.
It is best to use TI (Texas Instruments) booster charge pump device TPS60110, its peripheral components only need four small capacitors (2μF two, 15μF one, 33μF one., the voltage can be 10V).
A relatively simple scheme is to use charge pump devices, such devices only need external capacitors, but the output current is slightly smaller, such as TPS60110, input voltage range 7V~4V, output voltage 5V, maximum output current300mA, for the MCU, 300mA is enough.
No. Because the DC output is directly grounded, it causes a large current, and the pressure drop of the regulator is very large, almost all the pressure drop and power loss are added to the regulator. It may directly cause the breakdown of the regulator tube and damage the front circuit components, or directly burn the regulator tube and open the circuit.
You can think of your entire booster circuit as having a certain internal resistanceAfter the load resistance is reduced, the power supply requires a larger supply current, which causes the internal resistance of your power supply itself to produce a larger voltage drop, so the output voltage drops. To put it simply, your booster circuit has limited power and low load capacity.
The DCDC isolation module will have a large current at the start of the moment, the DCDC module manufacturer should have instructions, you can string a small resistor or power type NTC resistor at the input end, generally a few ohms. Can, mainly plays the role of limiting current. If your DCDC does not have a pre-EMC circuit (CLC circuit), it is recommended that you do.