BQ24133RGYT

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The BQ24133RGYT is a standby-mode battery-charger with integrated protection and optimized thermal characteristics. It offers quick charging and is compatible with USB powered devices. This device is a step-up, synchronous-rectified, and low-energy charging solution that consumes less than 130 mW when providing a regulated output voltage.

Overview

The BQ24133RGYT is an integrated charging solution that provides constant current, constant voltage charging and current/voltage regulation. Featuring a thermal regulation system that maintains optimal temperature control during charging, this device is well suited for battery charging systems. The built-in power management circuits offer the highest level of protection for both the battery and the charger, and the wide operating temperature range makes it suitable for both consumer and industrial applications.

The BQ24133RGYT supports a wide voltage input range from 4.2 V up to 16 V, and provides an adjustable output voltage from 1.8 V up to approximately 8 V. It can handle up to 1.5 A charge current, and also support low-current trickle charging for deeply depleted batteries. The integrated Power-by-Pin (PbP) control enables the device to shut down completely when the battery is nearly full, enhancing battery life and efficiency. The device supports detection and autonomous recharge of the battery following an accidental deep discharge.

Applications

The BQ24133RGYT is typically used in applications such as portable battery-powered consumer electronics, such as mobile phones, Bluetooth headsets and tablets. The wide input voltage range, low power consumption and integrated protection features make the device a suitable choice for automotive applications as well, such as night-vision camera systems, emergency backup systems, electronic control systems and other embedded applications.

Working Principle

The BQ24133RGYT operates in one of four modes depending on the input and output settings: direct-charge, stand-by, constant-current and constant-voltage. In these modes, the device monitors the battery voltage and controls the charging current in order to maintain a safe and efficient charging process. The device also provides autonomous recharge following an accidental deep discharge and can detect when the battery is full or nearly full and shut off the charging process.

The device also utilizes thermal regulation. The internal resistor divider network and current sensing circuitry is used to detect when the temperature exceeds the set threshold. When this occurs, the device reduces the charging current to maintain optimal thermal characteristics and prevent damage to the device.

The BQ24133RGYT also provides many safety features, including short-circuit protection, over-temperature protection and overcharge protection. It also provides protection against reverse polarity, so it can be used with any type of battery setup.

Conclusion

The BQ24133RGYT is a versatile, low-power charging solution with a wide input voltage range and integrated safety features. It is suitable for use in a variety of applications, including automotive and industrial applications. With its advanced thermal regulation, battery protection and low power consumption, the device is an optimal choice for battery charging applications.

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