The CXLB73266 synchronous boost charging chip is an efficient solution designed specifically for 5V adapters to charge two lithium batteries. By integrating 750kHz high-frequency synchronous boost architecture and power MOSFET technology, 92% ultra-high conversion efficiency and 1.5A fast charging are achieved, perfectly adapting to USB devices and DC power supply systems, significantly improving energy utilization and charging speed.
![[Efficient Charging Solution] CXLB73266 Synchronous Boost Chip: 1.5A High Current/92% Efficiency/20V Full Protection](http://www.jtm-ic.com/d/file/p/2025/04-30/2ff54b9376ddde0cf1baee6dd7db1aaf.png)
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[ CXLB73266 ]"
CXLB73266 synchronous boost charging chipIt is an efficient charging solution for two lithium batteries designed specifically for 5V adapters. By integrating 750kHz high-frequency synchronous boost architecture and power MOSFET technology, it achieves92% ultra-high conversion efficiencyand1.5A fast chargingPerfectly compatible with USB devices and DC power supply systems, significantly improving energy efficiency and charging speed.
Core strengths
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Fully integrated intelligent protection system
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Built in 20V voltage resistant MOS transistor, integrated with triple protection of undervoltage/overvoltage/surge, no need for external protective components
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Dual temperature monitoring of chip and battery, supporting145 ℃ high temperature current limiting shutdownEliminate the risk of overheating
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Output short-circuit protection+anti current backflow design, fully ensuring equipment safety
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Precise charging control
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± 1% ultra-high precision 8.9V regulated output, paired withDouble section 5.86V intelligent trickle switchingtechnology
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Dynamic recognition of adapter load capacity (input range)-0.3~22V）Intelligent allocation of current resources
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Dual color LED real-time display of charging status (normal/fault/standby), visualized operation and maintenance
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Industrial grade compact design
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adoptQFN4x4-16L ultra small packageSave 85% PCB space and adapt to miniaturized devices
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support-40℃~85℃Operating in extreme environments, compatible with 260 ℃ reflow soldering process
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Key parameter table
| category | performance metrics |
|---|---|
| Electrical Characteristics | Input 22V withstand voltage/output 8.9V± 1%/1.5A adjustable current |
| thermal management | Junction temperature protection of 145 ℃/working temperature range of -40~85 ℃ |
| Packaging specifications | 4mm× 4mm QFN-16L， Welding temperature resistance 260 ℃ |
| Protective characteristics | Continuous short circuit protection/real-time monitoring of battery temperature |
Full coverage of application scenarios
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smart terminal5G smartphones, foldable tablets, AR glasses
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portable deviceSports DV, electronic dictionary, blood glucose monitor
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IoT hardwareSmart watches, GPS trackers, RFID readers
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power supply systemPD fast charging module, car charger, energy storage device
CXLB73266 relies onFully integrated architectureBy eliminating external MOS transistors/freewheeling diodes and utilizing adaptive charging algorithms, it simplifies circuit design while extending battery life, becoming a benchmark solution for efficient charging systems in smart devices.
Product packaging diagram
circuit schematic diagram
