Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good PCB design practices, such as keeping the power and ground planes separate, using a solid ground plane, and minimizing trace lengths and widths to reduce EMI and noise.
To ensure accurate battery monitoring and charging, it's crucial to follow the recommended calibration procedure outlined in the datasheet. Additionally, consider using a high-precision voltage reference, such as the TLV431, and ensure that the battery voltage sense lines are properly filtered and shielded.
The maximum charging current for the BQ4802LYDWR is 2A, but it's essential to consider the thermal limitations of the device and the battery being charged. The device can operate up to 85°C, but the charging current should be derated above 70°C to prevent overheating.
While the BQ4802LYDWR is designed for Li-Ion batteries, it can be used with other battery chemistries, such as LiFePO4 or NiMH, with some modifications to the charging algorithm and voltage thresholds. However, it's essential to consult the datasheet and application notes for specific guidance and to ensure safe and reliable operation.
The BQ4802LYDWR has built-in overcharge protection, but it's essential to configure the device correctly using the OTP (One-Time Programmable) memory. The OTP settings define the charging voltage and current limits, as well as the timeout periods for overcharge detection.
BQ4802LYDWR datasheet
by Texas Instruments
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