BQ76942, which supports 3-series to 10-series battery cells, and BQ76952, which supports 3-series to 16-series battery cells, are battery monitor and protector devices used in battery packs. Those two devices integrate a one-time-programmable (OTP) memory. Writing initialize settings into OTP helps save initialize configuration before system power up. Users need to write OTP on the product line. This application note introduces a step-by-step hardware setup and software process which helps users save time to complete OTP configuration.
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The BQ769X2 device can be used in Li-ion, Li-polymer, and LiFePO4 battery packs. The device features include monitor battery voltage with high accuracy, configurable protection function, host controlled cell balancing, internal temperature sensing, integrated OTP memory. For users who want to permanently configure the device parameters on the product line, OTP memory can be used to store some key parameters. This application note focuses on introducing OTP programming step-by-step and make the design process easier.