BQ25792RQMR

Battery Chargers Overview

The BQ25792RQMR is an I2C-controlled, synchronous buck-boost battery charger IC designed for 1 to 4-cell lithium-ion or lithium-polymer battery packs. It supports a maximum charge current of 5A and operates with input voltages ranging from 3.6V to 24V. The device features a dual-input selector and USB PD 3.0 OTG output capability. Key electrical parameters include a maximum battery pack voltage of 18.8V and a supply voltage up to 24V. It utilizes a 29-VQFN-HR (4x4) surface-mount package and functions within a junction temperature range of -40°C to +85°C.

Battery Chargers Feature Summary

• Synchronous buck-boost architecture ensures efficient charging regardless of whether the input voltage is lower than, equal to, or higher than the battery voltage.
• Integrated dual-input selector allows flexible power source management between USB ports and external adapters.
• Supports USB Power Delivery 3.0 and On-The-Go (OTG) functionality for versatile host and peripheral modes.
• Programmable charging parameters including current, voltage, and timers via standard I2C interface.

Battery Chargers Applications

• Portable devices powered by USB Type-C or adapter sources
• Battery management systems for 1 to 4-cell Li-ion/Li-Po packs
• USB PD 3.0 compliant power delivery applications
• On-The-Go (OTG) peripheral power solutions

Battery Chargers Procurement Notes

Verify the specific suffix 'RQMR' corresponds to the required tape-and-reel packaging configuration and moisture sensitivity level (MSL 2). Confirm that the 29-VQFN-HR package dimensions align with the target PCB footprint. Ensure the I2C address settings are compatible with the host microcontroller's bus topology. Check for any recent Product Change Notifications regarding manufacturing site changes or material composition updates.

Battery Chargers Selection Notes

Select this component when a high-current (up to 5A) buck-boost charger is required for multi-cell battery configurations. It is suitable for designs needing integrated USB PD 3.0 and OTG support without external protocol controllers. Consider the I2C control requirement for dynamic parameter adjustment. Evaluate the thermal performance requirements given the 5A capability in a compact QFN package. Verify compatibility with the intended battery chemistry (Li-ion or Li-Po) and cell count (1-4 series).

Battery Chargers Part Context

The BQ25792RQMR belongs to the Texas Instruments BQ2579x family of highly integrated battery chargers. This family targets portable electronics requiring robust power management with USB connectivity. The RQMR suffix denotes the specific reel-based packaging variant of the BQ25792 device. It shares core architectural features with other members like the BQ25790 and BQ25798, differing primarily in packaging and specific pinout configurations.

Battery Chargers Replacement Considerations

Direct functional substitutes within the same family include the BQ25790 and BQ25798, though package differences must be addressed. Cross-family replacements require careful evaluation of I2C register compatibility and thermal characteristics. Verify that alternative parts support the same 1-4 cell voltage range and 5A current limits if maintaining system specifications is critical.