The applications for multi-type lithium batteries are increasing, especially in small appliances that require low power. Today, we will introduce several charging management ICs for single-cell multi-type lithium batteries to help those in need quickly select the right model. This includes features such as solar MPPT, transportation mode, and path management for engineers to choose from.
1. Linear Charging ICs
For charging single-cell lithium batteries, the power is generally low, and a cost-effective solution is usually to choose a linear step-down charging IC.
When selecting these linear charging ICs, the first thing to check is which one has the appropriate charging current. For example, if a lithium battery has a capacity of 2000mAh and the current is 0.6A, the charging time will be approximately 3.33 hours, considering losses, it may take longer. If you need to charge it faster, choose an IC with a higher current, such as the CS5069, which can charge at 1A in just 2 hours.
Generally, the acceptable charging time for most users is below 2.5 hours; of course, the faster, the better. However, linear products do not support fast charging, so you can look at the following step-up/down charging ICs that support fast charging protocols.
Next are additional features; for solar MPPT or path management, you can choose the IU5070E. If you need transportation mode, select the CS5160D.
2. Switch-Mode Step-Down Charging Management ICs
Switch-mode products are generally more efficient than linear ones. The most obvious feature of switch-mode step-down ICs is their higher charging current, making them more suitable for charging high-capacity lithium batteries in series and parallel configurations. Higher current reduces charging time. For example, for a series of two parallel lithium batteries with a capacity of 4Ah, the IU5370E can charge it in about 1.2 hours.
There are also two solar charging options available, CS5363E and IU5987T, which can be selected based on different needs.
3. Switch-Mode Step-Up/Step-Down Charging Management ICs
Asynchronous step-up/step-down charging ICs are designed for special scenarios and tend to be more expensive. Here’s a brief introduction.
The CS5622D is a versatile option with wide input and output compatibility, suitable for 1-12 cell batteries, capable of reverse discharge, featuring I2C, and equipped with a 10-bit ADC, making it a strong product choice.
The remaining models, IU5180, 5186, and 5200, are similar and are essentially upgrades of the previous model. The 5180 adds fast charging functionality, meaning if you need fast charging, you should at least choose the IU5186. If I2C is also required, then the IU5200D is the right choice.
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