BQ24204DGN

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The BQ24204DGN is a highly integrated Battery Management System (BMS) from Texas Instruments that makes it possible to monitor the performance of single cell Li-Ion batteries while providing charge current up to 4A. It is designed to address the requirements of handheld and portable applications with a wide input voltage range, thermistor inputs and charge/discharge FETs. This PMIC is part of the TI Battery Management family and combines an efficient DC/DC buck-boost controller and charge current with an analog battery gauge and protection specifically designed for Li-Ion batteries.

The BQ24204DGN is specifically designed to provide battery charging in portable and handheld devices that have a limited current input capacity. In these low-power applications, the BQ24204DGN can provide regulated conversion from a wide range of input voltages such as USB 5V, up to 8V, to the specified voltage of the connected battery. The device includes all features necessary for for low-power, single-cell Li-Ion battery applications such as charge current and voltage regulation, thermal regulation, and safety features.

The BQ24204DGN provides an efficient DC/DC buck-boost switching converter providing up to 4A of charge current. The device includes an internal low dropout linear regulator (LDO) to accurately regulate charge voltage of the battery while leading the burn-in effect, and an adjustable terminal Current Sense Amplifier (CSA) that adjusts the peak current limit and charge/discharge currents based on inputs from a thermistor or other temperature sensor. In addition, the BQ24204DGN offers an embedded voltage assistant that communicates with the host processor through an Inter-Integrated Circuit (I2C) interface.

The BQ24204DGN also includes analog battery gauge and protection specifically designed for single-cell Li-Ion batteries. This device monitors the battery voltage and current, and shows the charge and discharge levels on a 5-bit comparator-based LED. The BQ24204DGN also includes a voltage supervisor circuit with over-voltage and under-voltage protection to prevent excessive voltage stress on the battery. In addition, the BQ24204DGN has other features such as charge complete, battery precharge detect, fault detect, and automatic recharge.

In summary, the BQ24204DGN is a highly integrated BMS from Texas Instruments that enables multimode charging for single cell Li-Ion batteries in low-power applications. This PMIC is suitable for handheld and portable applications with a wide input voltage range, thermistor inputs, and charge/discharge FETs, providing an efficient DC/DC buck-boost controller and charge current, an analog battery gauge, and protection specifically designed for Li-Ion batteries.

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