MAX1908ETI+T

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Battery chargers are an important part of a portable electronic device. Charging times must be accurate and reliable, with minimal energy consumption. The MAX1908ETI+T offers one of the highest level of flexibility and integration available in a battery charger. It is the first true two-cell Li-Ion charger with integrated buck/boost with an integrated internal 2.2Ω switch, providing an extremely efficient solution for two-cell charging applications.

The MAX1908ETI+T is a single-channel, dual-input step-down, step-up Li-Ion Linear charger. This battery charger offers a wide range of charging capability for applications such as cellular telephones, digital cameras and other handheld portables. It supports dual input sources and accepts both USB 5V and single-cell Li-Ion inputs. The ±3% charging accuracy ensures reliable charging capability while reducing overall battery charge time.

The charger follows a linear charging method which is optimal for high-accuracy charging. It features an adjustable constant-current charge profile and allows the user to define the charge current up to 3A. A thermistor-based thermal protection mechanism is used to protect the battery from overcharging or over-discharging, providing reliable and accurate over-temperature protection.

The MAX1908ETI+T offers an adjustable input power path with a low-power standby path for system optimization and is protected against a variety of factors that can cause damage to the system such as input over-voltage, input under-voltage, output over-current and thermal shutdown.

Integrated power-MOSFETs provide high efficiency forward and reverse modes, allowing the system to operate in buck or boost configuration with an internal 2.2Ω switch. This flexibility enables the charger to support a wide range of voltage and current requirements.

This battery charger also includes an integrated linear charger timer and an input over-voltage protection circuit. The timer consists of a programmable adjustable current limitation and voltage rating, ensuring the entire battery charge process is monitored and controlled. The adjustable input over-voltage protection circuit prevents the system from being damaged by high input voltages.

The MAX1908ETI+T application field includes cellular telephones, digital cameras, and other handheld portables. Its small size, high-efficiency and wide range of charging capability make it a great choice for any application requiring an integrated, efficient charger. With its powerful set of features and high-accuracy charging, it can provide reliable and accurate charging of Li-Ion batteries for increased system lifetime.

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