开关电源一定会带来纹波。。

其他的方案可以看看AD8451  ADP2291

http://www.analog.com/cn/products/application-specific/industrial/industrial-battery-manufacturing/ad8451.html

http://www.analog.com/cn/products/power-management/battery-management/battery-charger-ic.html

PDF

Please refer on the attached file

Compensator Design for a Battery Charge/Discharge Unit Using the AD8450 or the AD8451

Yes, you are right.

Better to use the circuit with less components.

Except 6V, any other problems?

My concern is that : AD8451 is a single power rail part; Can it will work properly in this circuit?

Many thanks.

AD8450/AD8451和ADP1972/ADP1974

应该不算latest方案了的吧？AD8452集成度更高，不过公开的资料，尚不多。

http://www.analog.com/cn/products/application-specific/industrial/industrial-battery-manufacturing/ad8452.html

There is not an evaluation board containing both the AD8451 and ADP1972.

There is an AD8450/ADP1972 Battery Testing and Formation Evaluation Board that may be made available for evaluation by contacting your local Analog Devices Sales Office.  An informative…