Description

TIDA-00744 is a 50-W system-level SMPS design for mid-power automotive infotainment systems. 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 TVSsEMI filter: A differential filter for conducted EMI suppressionPreboost: Efficient low-cost nonsynchronous preboost design for 50-W applications. The output is maintained at 10 V and when Vin > Vout (programmed boost out): the output follows the input and bypass operation is achieved (through a conducting PFET when VIN > programmed 10-V boost output).Dual buck controller: 2.2-MHz switching for AM band avoidance: as well as small-size solution. Supports two outputs; 5 V at 5 A and 3.3 V at 5 A. The syncout of controller is used to sync boost at F/9 frequency.