BQ24038RHLTG4

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The BQ24038RHLTG4 PMIC - Battery Chargers is a high efficiency, 4-channel battery charger solution. The device includes four dedicated Li-Ion/Li-Polymer battery linear constant current and constant voltage or current regulating charger and active power path management devices. Each of the four battery channels can independently charge with four floating charge voltages and current selection. The device also includes two bypass paths and two buck converters, which provide power path management and pre-charge capability. In addition to this, the device features a watchdog timer for user system reset, a high-current input source for charge current regulation, and a low-dropout voltage output for system protection.

The BQ24038RHLTG4 PMIC - Battery Chargers contains a 4-channel programmable buck regulator and two additional input bypass transistors. The four channels can be configured to provide float charging currents from 100mA up to 2A. The voltage selection ranges from 3.4V up to 4.4V, with voltage accuracy up to ±0.6% over temperature. The device also features temperature monitoring, thermal regulation, and auto-restart capabilities. The two buck converters, which are controlled via a single shutdown input, can be used to provide a charging current or power up to 6A combined. The input bypass transistors allow the user to connect the BQ24038RHLTG4 battery charger to an alternative power source during battery depleted conditions.

The BQ24038RHLTG4 PMIC - Battery Chargers offers several advantages over conventional 3-channel battery chargers, including efficiency up to 65%, reduced size and cost, and ease of integration into the system. In addition, the device features reduced thermal risks due to its low electro-thermal loss. Furthermore, the device is equipped with advanced protection features including over-voltage, over-temperature, short-circuit and reverse battery protection, as well as fault monitoring. This feature set makes the BQ24038RHLTG4 ideal for a wide range of cost-sensitive, high-reliability applications such as portable medical and wearable devices.

In terms of its working principle, the BQ24038RHLTG4 PMIC - Battery Chargers is based on several charge topologies including a constant current/constant voltage (CCCV) charger, a voltage regulator and a bypass transistor. The device detects the input source and provides a charge current at the programmed constant current level. When the battery reaches the target voltage, the device switches to constant voltage mode and monitors the battery until it is in full charge. The bypass transistor operates as a current source, directing the input current through the battery terminal when the battery is drained. Additionally, the voltage regulator can be used to power the system directly from the input source or from the battery. The watchdog timer provides a reset signal to the system microcontroller in case of an over-temperature, over-voltage or system fault event.

In conclusion, the BQ24038RHLTG4 PMIC - Battery Chargers offers excellent performance in terms of efficiency, small size and reduced cost. The device supports multiple charge topologies, advanced protection features and fault monitoring, making it ideal for a variety of cost-sensitive, high-reliability applications. Moreover, the device includes a bypass transistor and a voltage regulator, allowing it to be operated in power path management or system precharging mode. It is therefore suitable for a wide range of battery powering applications where reliable and efficient charging is desired.

The specific data is subject to PDF, and the above content is for reference