LiFePO4 charger design

[tpimh]

I'm designing a battery management system for 4-cell LiFePO₄ battery which will have protection, balancing and charging functions.
For overcharge, overdischarge, charge overcurrent and discharge overcurrent protection and cell balancing I would use a R5436T508BA (datasheet). But I have no idea about the charging circuitry. As I understand, LiFePO4 uses constant voltage and constant current for charging, should be pretty easy to implement, right?
I have three different chargers in mind: step-up (for example, 5V to 14.6V booster), step-down (for example, 24V to 14.6V) and buck–boost converter (wide range). This kind of charger may get pretty complex (example 4S LiFePO₄ 6-36V_in charger design) and I want to keep it simple, yet I don't want my battery to die soon. Could you please recommend some charger IC for charging that will behave well with R5436 by it's side? If you think I don't understand something, please tell and optionally add a link to an article with explanation.

[soubitos]

charging and protection/balancing are generally speaking separate things.. if you have the second covered, the first one should be a little bit "easier" as there are more options out there but still tricky as you need to find the right one...
You can check ICs like LT3652, LTC4121, LTC4015 (these just from Linear and from a short search, i bet there are plenty more to suit your needs.... but keep in mind LiFePO4 is not that extensively available as "standard" LiIon or LiPo

[jram]

I run a 600Ah Lifepo4 bank.  In designing the protection system, I opted to protect the batteries from over and undercharging with custom parameters that would increase the life of my bank.  Charging to 3.6V and discharging to, say 10V, will likely result in a shorter bank life so I chose voltages of 13.8 - 12V for everyday, low C useage.  Our maximum current draw is about 180A (12.8V) when we have the kettle and the hot water heater on.  Without knowing your use case, its hard to say what's right, however, I found no ICs that would allow me to set the parameters I wanted so I just use a microcontroller to provide warning and protection.