A 4-layer PCB with a solid ground plane and a separate power plane is recommended. The device should be placed near the battery, and the power inductors should be placed close to the device. A thermal pad should be used to connect the device to the PCB.
The inductor value depends on the input voltage, output voltage, and switching frequency. A good starting point is to use the inductor value recommended in the datasheet (e.g., 1.5 μH). Then, adjust the value based on the specific application requirements and efficiency targets.
The maximum ambient temperature for the BQ24703PWR is 85°C. However, the device can operate at higher temperatures with derating. Refer to the datasheet for thermal derating curves.
The BQ24703PWR has a built-in overcurrent protection feature. Connect a sense resistor (Rs) between the VIN pin and the GND pin. The device will detect overcurrent conditions based on the voltage drop across Rs and shut down if the current exceeds the programmed threshold.
Yes, the BQ24703PWR is designed to work with lithium-ion batteries. However, ensure that the battery's charging profile and protection requirements are met. The device can be configured to support various charging profiles, including constant current and constant voltage modes.
BQ24703PWR datasheet
by Texas Instruments
