S-8252AAY-I6T1U

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The S-8252AAY-I6T1U is an advanced PMIC (Power Management IC) and battery management IC (BMC) from STMicroelectronics. It is designed to intelligently manage and monitor the charging, protection and monitoring requirements of multi-cell, high voltage lithium ion (Li-ion) and lead-acid batteries. The device features a 48-pin SOIC pack, a trio of internal oscillators and a high-speed 4-channel ADC (analogue-to-digital converter).

The S-8252AAY-I6T1U is a battery management IC (BMC) designed to provide intelligent control and monitoring of multi-cell lithium ion or lead-acid batteries. It features an integrated microcontroller and two low power HALT blocks to provide low standby current and maximize standby time. The device includes a 3-phase buck regulator with integrated current sensing and temperature protection, and an integrated over-voltage protection (OVP) to protect against cell overcharging and overvoltage. The S-8252AAY-I6T1U also interfaces to a wide range of peripherals (including thermistor, thermistors, etc.) to provide protection from over-discharge, over-temperature, over-current, and short circuit.

The S-8252AAY-I6T1U combination of integrated LDOs, switches, and ADC (analogue-to-digital converter) enables system designers to create compact and optimized power solutions for a variety of applications, such as battery powered tools, portable medical devices, and multi-cell storage systems. The integrated LDOs and Switches provide the necessary power rails to support the whole system while the integrated buck regulator provides the charging function. The ADC allows for accurate monitoring of the battery\'s voltage and current.

The onboard HA3732 bipolar transistor is used to provide bleeding resistors in the system when necessary, and helps reduce the power supply effect on the battery. HA3732 helps to prevent sudden changes in the battery\'s behavior caused by large inrush current or ESR changes during charging. The ADC is also used to monitor the system temperatures, and the integrated over-temperature protection (OTP) and overvoltage protection (OVP) safeguard the system from getting damaged due to overcharging or over-temperature problems. The integrated 4-channel ADC also provides data logging capability to record events and gather information.

The S-8252AAY-I6T1U comes with I2C (Inter-Integrated Circuit) interface and an array of timers, PWM (pulse width modulation) drivers, and other timers for controlling the power distribution and other functions. The integrated buck regulator provides up to 4A of continuous output current, and supports pulse skipmode and Burst Mode operation for improved light load efficiency. Low standby current consuming areas with variable current limits are also supported.

The S-8252AAY-I6T1U fulfills a variety of system-level requirements in multi-cell battery applications, such as battery-backed power supplies for M2M (machine-to-machine) communication, portable medical devices, consumer devices, and automotive systems. The intelligent power supply management and protection features of the device make it ideal for a wide range of battery-powered system applications.

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