Lithium Battery 3.7V Lithium Polymer Battery 3.2V LifePo4 Battery 1.2V Ni-MH Battery Button Coin Battery
3.7V Battery Pack 7.4V Battery Pack 11.1V Battery Pack 14.8V Battery Pack Other Battery Pack
Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2024-09-12 Hits: Popular:AG11 battery
Brief analysis of the processing method of the boost circuit powered by LR1130 battery
In the DC/DC boost circuit, power is directly supplied from the input or from the output
A startup circuit is added on the basis of the original DC/DC
Portable products are generally powered by batteries. Due to cost and volume considerations, there is a trend to reduce the number and volume of batteries used in the design. If the number of batteries is reduced, the power supply voltage will be lower than the required working voltage of the device. At this time, the DC/DC boost circuit is required. In addition, due to global energy issues, the use of various types of batteries has attracted much attention, including LR1130 battery.
Generally, the minimum voltage of a single solar cell is between 0.4-0.7V. Under such a low input voltage, the following three major problems will be encountered:
Driving problem of switching devices
Current DC/DC boost circuits generally have two power supply methods, one is directly powered from the input, and the other is powered from the output. If the power supply is from the input, the high level of the NMOS is at most equal to the input voltage under normal circumstances. When the input voltage is very low, the NMOS with a low start-up voltage should be selected. If the output power supply is selected, a higher drive voltage equal to the boosted voltage can be obtained at the EXT drive end, which not only makes it easier to turn on the NMOS, but also obtains a lower Rdson to improve efficiency. Of course, these are all based on the premise that the IC starts working, but when the power supply voltage is lower than the startup voltage of the entire IC, the latter will be even more difficult to start than the former because it will pass through a diode, so it brings a question, how to start this IC?
Startup problem of boost circuit
The operating voltage of traditional DC/DC is generally above 1.0V, and if the input voltage drops below 0.6V, the internal circuit of DCDC cannot work normally. At this time, we need to consider adding a startup circuit based on the original DC/DC. This circuit should include the following important parts: an oscillator that can still work at as low as 0.3V, a charge pump voltage doubling circuit, and a voltage test comparator.
The basic working conditions are as follows: First, 0.3V is connected, the oscillator works, and then the charge pump starts to double the voltage. When the required IC drive voltage is obtained, the IC's VDD is powered. When the IC enters normal operation, the output power supply replaces the power supply of the startup circuit, and the startup circuit enters sleep mode. After the boost circuit works normally, people will be concerned about the highest voltage they can get. This leads to another question, what is the maximum duty cycle?
The problem of maximum duty cycle
For ultra-low input boost circuits, in order to obtain high output voltage, a large duty cycle must be supported.
In the continuous current mode, the calculation formula for the duty cycle (Duty) is Duty=1-Vin/Vout. According to this formula, if the input is 0.5V and the output is 5V, the maximum duty cycle is 90%, and the duty cycle of the general boost circuit is 80%~90%, which cannot fully meet the requirements.
Theoretically, the larger the duty cycle, the stronger the maximum boost capability (of course, the duty cycle cannot reach 100% like the buck), but due to non-ideal factors: inductor parasitic resistance, driver tube internal resistance, Schottky forward voltage drop, etc., when the duty cycle reaches a certain level, its boost capability will become worse. Therefore, we need to improve the above non-ideal factors and obtain a suitable high enough duty cycle to meet our boost needs.
In short, dealing with the above three problems can solve the problem of designing a boost circuit that requires ultra-low voltage input startup for single-cell solar power supply.
Read recommendations:
Can lithium iron phosphate batteries be used at minus 10 degrees?
Popular recommendation
802540 battery wholesaler
2023-03-22803040 polymer battery company
2023-03-22energy storage battery for solar system Processing
2023-05-10522749 battery Processing
2023-03-2232700 battery Processing
2023-03-22775767 3500mAh 7.4V
2022-08-19No.2 card-mounted carbon battery R14
2023-06-28701224 145mAh 3.7V
2022-08-19Lithium-ion battery GN200
2022-07-29Li-ion 32700 6000mAh 3.2V
2022-06-20Lithium Battery LQ-1218
2022-08-19801620 180MAH 3.7V
2023-06-10602248 600MAH 3.7V
2023-06-10Plastic pet muzzle
2022-09-22Coin Battery LR 936
2022-10-15lithium ion battery cells 18650
2023-06-25CR2354 battery
2023-06-253.7V lipo battery
2023-06-2518650 battery lithium ion 2200mah
2023-06-25lithium battery 18650
2023-06-25Protection Mechanisms of BMS Lithium Battery Protection Board
2024-10-19The disadvantage of lithium iron phosphate battery.household energy storage lithium battery manufact
2023-05-06AG Coin battery Common type
2022-06-189.6kwh energy storage lithium solar battery.How to extend the service life of battery packs
2023-11-03Lithium-ion Batteries with Ternary Materials
2024-11-25The production process of lithium battery.button cell battery cr1620
2023-07-18How can soft pack batteries achieve technological breakthroughs?Nickel Metal Hydride No. 5 battery
2023-08-02How to charge the new battery?18650 battery rechargeable
2023-07-12The main category of power batteries.lithium 3400mah 3.7v 18650 battery
2023-06-17Analysis of the causes of zero voltage in lithium batteries!button cell battery cr1620
2023-08-23