MAX17035ETG+

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PMIC - Battery Chargers

The MAX17035ETG+ is an application field, optimized to reduce the charge time and increase the available capacity of a single lithium-ion cell, while providing accurate state-of-charge (SOC) and state-of-health (SOH) information. It is designed for use in laptops, mobile phones, PDAs, digital cameras, and other mobile devices.The MAX17035ETG+ features a 2-wire, I²C interface, allowing for easy integration into a wide range of applications. On-chip logic circuitry and hardware accelerators reduce software complexity, while making it easy to implement optimized algorithms for regulating the charging process. The MAX17035ETG+ is designed to provide regulated charging for single-cell lithium-ion and lithium-ion polymer batteries. It contains full charging control and protection circuitry, dynamic input power management, and a fuel gauge subsystem with an improved non-invasive, OCV-based methodology to estimate the capacity. The MAX17035ETG+ also integrates a sense resistor, reducing the external component count.

Working Principle

The MAX17035ETG+ operates using several core components: a master I²C, on-chip comparators, a power switch, and a charge/discharge switch. The I²C is used to control the various functions of the device, while the comparators are used to monitor the battery voltage during charge and discharge. The power switch controls the charging and discharging rates, while the charge/discharge switch shuts the power off when the battery is full or empty.The charging process is controlled by two different methods. The first is a 4-bit current-mode control, which dynamically adjusts the charge rate depending on the battery temperature. The second is a 5-bit digital control, which sets the upper and lower voltage limits for the battery.The charge/discharge switch is used to disconnect the power from the battery when it reaches a full or empty state. This helps protect the battery from being overcharged or discharged.The fuel gauge subsystem consists of a high-precision coulomb-counting circuit, a temperature compensator, and an improved OCV-based algorithm to estimate the remaining capacity of the battery. This helps provide accurate information about the current state of the battery.

Conclusion

The MAX17035ETG+ is an application field optimized for providing accurate state-of-charge and state-of-health information, as well as reducing charge time, increasing available capacity, and managing the power input. It features an I²C interface and on-chip logic circuitry with hardware accelerators, allowing for easy integration into a wide range of applications. Additionally, it contains full charging control and protection circuitry, dynamic input power management, and a fuel gauge subsystem that uses an OCV-based methodology to estimate the capacity. Altogether, the MAX17035ETG+ is an ideal choice for providing regulated charging for single-cell lithium-ion and lithium-ion polymer batteries.

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