Can I use the AD8452 chip to achieve CC and CV control separately? Still only able to achieve CC-CV control?
Unfortunately not, we are limited by the internal architecture of the device. The outputs of the CC and CV loop filter amplifiers are internally connected to the VINT pins via an analog NOR circuit (minimum output selector circuit), such that they can only pull the VINT node down. In other words, the loop amplifier that requires the lowest voltage at the VINT pins is in control of the node. Thus, only one loop, CC or CV, can be in control of the system charging control loop at any given time.