regardind the SM72442 and full bridge SM72295 to charge a NiMh batterie of 24 V, from a voltage source than can be lower or higher, it is possible to have use the SM72442 in a buck/boost mode and constant current source ?
there is a app note related to acid battery charge http://www.ti.com/lit/an/snosb76b/snosb76b.pdf
bests regards