Description

PMP10749 is a 100-W system-level SMPS design for a higher-power automotive infotainment system. The design has protections: such as load dump through TVS (ISO pulse testing): as well as reverse voltage (innovative smart diode with very low Iq) protection. Furthermore: all the controllers (boost and dual bucks) are in SYNC for EMI-optimized design.The design is divided into four major blocks:Protection: Reverse battery protection through efficient smart diode and automotive transient protections through TVS.EMI filter: 14-A common modes choke at front end with a differential filter for conducted EMI suppression.Preboost: Highly efficient synchronous preboost design for 100-W application. The output is maintained at 10 V and when Vin > Vout : the output follows the input and true bypass operation is achieved.Dual buck controller: 2.2-MHz switching for AM band avoidance: as well as small size solution. Supports two outputs: 5 V at 10 A: as well as 3.3 V at 10 A. The syncout of controller is used to sync boost at F/10 frequency.