Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow the guidelines in the application note 'BQ24720/1/2/3 Layout Guidelines' (SLUA645) for optimal performance.
The selection of external components such as resistors, capacitors, and inductors depends on the specific application and charging requirements. Refer to the datasheet and application notes for guidance on component selection, and use the TI Power Stage Designer tool to help with component selection and optimization.
The BQ24721CRHBRG4 is rated for operation up to 85°C ambient temperature, but it's recommended to derate the device for reliable operation above 70°C. Refer to the datasheet for thermal derating information.
The BQ24721CRHBRG4 has built-in OVP and UVP, but it's recommended to add external protection circuits to ensure reliable operation. Refer to the application note 'BQ24720/1/2/3 Overvoltage and Undervoltage Protection' (SLUA646) for implementation guidelines.
A low-ESR ceramic capacitor with a value of 10uF to 22uF is recommended for the input capacitor. The specific value depends on the input voltage and current requirements of the application.
BQ24721CRHBRG4 datasheet
by Texas Instruments
