BQ24702PW

Battery Chargers Overview

The BQ24702PW is a multichemistry battery charger controller and system power selector designed for notebook applications. It features dynamic power management to minimize charge time by adjusting current based on adapter limits. The device includes a 300-kHz integrated PWM controller for buck regulation, ±0.4% charge voltage accuracy, and ±4% charge current accuracy. It supports zero-volt operation and depleted battery detection. The component operates within a supply voltage range up to 28V and utilizes a 24-pin TSSOP package.

Battery Chargers Feature Summary

• Dynamic Power Management (DPM) adjusts battery charge current based on total system adapter current to minimize charge time.
• Integrated selector circuit supports battery conditioning and smart battery learn cycles with break-before-make transitions.
• High-precision charge control with ±0.4% voltage accuracy suitable for Li-Ion cells and ±4% current accuracy.
• Zero-volt operation capability allows charging of deeply discharged batteries without pre-conditioning.

Battery Chargers Applications

• Notebook PC battery charging systems
• Sub-notebook PC power management
• Smart battery pack conditioning

Battery Chargers Procurement Notes

Verify the specific ordering suffix to confirm package type and tape/reel specifications. Ensure compatibility with existing thermal design requirements for the TSSOP-24 footprint. Confirm RoHS compliance status matches project environmental standards. Validate that the 28V maximum input rating aligns with the wall-adapter specifications in the target application.

Battery Chargers Selection Notes

Select this component when dynamic power management is required to optimize charge times using available adapter capacity. It is suitable for designs needing precise voltage regulation for lithium-ion chemistry. Consider the 24-pin TSSOP package constraints for PCB layout. Verify that the integrated PWM frequency meets EMI requirements for the specific enclosure.

Battery Chargers Part Context

The BQ24702PW belongs to the BQ2470x family of highly integrated battery chargers from Texas Instruments. It shares functional similarities with the BQ24703 but lacks the QFN package option. This series addresses the need for compact, efficient power management in portable computing devices requiring multi-chemistry support.

Battery Chargers Replacement Considerations

BQ24702PWR is listed as a parameter-equivalent alternative.