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:2024-04-07 Hits: Popular:AG11 battery
About the design of voltage feedback circuit in current mode switching battery 18650 rechargeable
In order to solve this problem, the current mode control mode can be used. Current-mode control not only retains the output voltage feedback of voltage-mode control, but also adds inductor current feedback; and this current feedback serves as the slope function of the PWM control converter, thereby eliminating the need for a sawtooth wave generator, making the system performance significantly better. superiority. The characteristics of the current-mode control method are as follows:
1. The system has fast input and output dynamic response and high stability;
2. High output voltage accuracy;
3. Has the inherent ability to control the power switch current;
4. Good parallel operation capability. Since the rate of change of the feedback inductor current didt changes directly with changes in the input voltage and output voltage. In the voltage feedback loop, the output of the error amplifier is used as a current given signal. Compared with the feedback inductor current, it directly controls the on-off duty cycle of the power switch. Therefore, voltage feedback is a very important issue in the design of current-mode power supplies. This article introduces the design of the voltage feedback circuit when using the current mode control chip uc3842.
Introduction to uc3842
Its internal reference circuit generates a +5V reference voltage as the internal battery 18650 rechargeable of UC3842, and the attenuated 2.5V voltage is used as the error amplifier reference, and can be used as a circuit output 5V/50mA battery 18650 rechargeable. The oscillator produces square wave oscillation. The oscillation frequency depends on the external timing component. The resistor R connected between pin 4 and pin 8 and the capacitor C connected between pin 4 and ground jointly determine the oscillation frequency of the oscillator, f= 1.8/RC. The feedback voltage is connected to the inverting terminal of the error amplifier from pin 2. Pin 1 is connected to an external RC network to change the closed-loop gain and frequency characteristics of the error amplifier, and pin 6 outputs a square wave that drives the switching tube as a totem pole output. Pin 3 is the current detection terminal, used to detect the current of the switch tube. When the voltage of pin 3 is ≥ 1V, UC3842 will turn off the output pulse to protect the switch tube from overcurrent damage. The UC3842PWM controller is equipped with an undervoltage lockout circuit with a turn-on threshold of 16V and a turn-off threshold of 10V. Because of this, oscillation when the circuit is operating near the threshold voltage can be effectively prevented.
UC3842 has the following features:
1. The number of pins is small, the peripheral circuit is simple, and the price is low;
2. The voltage regulation rate is very good;
3. The load regulation rate is significantly improved;
4. Good frequency response characteristics and large stability;
5. It has over-current limit, over-voltage protection and under-voltage lockout functions.
Read recommendations:
The difference between 18650 lithium battery and 32650 lithium battery.18650 battery 1800 mah
Analysis of the Causes of Lithium Battery Charging Explosion.Nickel Hydride No. 5
Last article:3.7v 3000mah 18650 battery
Next article:button cell battery cr1620
Popular recommendation
702535 battery wholesaler
2023-03-22Ni-MH battery pack
2023-05-09601248 battery wholesaler
2023-03-22household energy storage lithium battery wholesale
2023-05-10AAA Ni-MH batteries Processing
2023-03-229V USB 1.5V 1000mWh
2023-06-29402427 260mAh 3.7V
2022-08-19Coin Battery LR 41
2022-10-1514500 850mAh 3.7V
2022-08-1918650 2000mAh 3.7V
2022-06-20LR03
2022-07-23601848 500MAH 3.7V
2023-06-10601848 500mAh 3.7V
2022-08-19Lithium Battery LQ-1220
2022-08-19Li-ion 18650 3500mAh 3.7V
2022-06-2018650 battery pack Processing
2023-06-252000mah 18650 battery
2023-06-2518650 battery pack Vendor
2023-06-2518650 battery 2200mah
2023-06-25CR1620 battery
2023-06-25What Are the Lithium Battery Certification Systems
2024-11-0120kwh energy storage battery.What are the important reasons for the capacity degradation of lithium
2023-11-10Military vehicle power battery standard
2024-03-07Lithium-ion Batteries for Electric Vehicles
2024-12-26Cathode Materials for Cylindrical Lithium - ion Batteries
2025-03-07Lithium battery safety.Nickel Hydride No. 5 battery
2023-03-28Reminder of lithium battery maintenance
2023-06-02The decline of smartphone battery capacity?18650 rechargeable battery lithium 3.7v 3500mah
2023-09-14Some performance requirements of high magnification batteries.902030 polymer battery
2023-05-18What are the components and application characteristics of ternary lithium batteries?
2023-06-20