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TPS53667EVM-769: Internal gain in TPS53667 COT controller

Part Number: TPS53667EVM-769
Other Parts Discussed in Thread: TPS53667


I would like to know if there is any internal gain in the isum feedback to PWM comparator in TPS53667 COT controller? The datasheet (for D-CAP+ control) expression (shown in Fig. 3) says that there is an gain of about 1/6 but the datasheet of TPS53667 (shown in Fig. 2) says the internal gain is 1. Also, there is no internal gain for VISUM_AC mentioned in the block diagram ( shown in Fig.1.) from datasheet of D-CAP+ control. 

Fig.1. Block Diagram of COT Controller

Fig. 2. Internal sense gain from datasheet of TPS53667

Fig. 3. Visum_ac Expression given in datasheet of D-CAP+ control