ACT2801 / ACT2801B 5V/1.5A Backup Battery Pack Manager Power Bank FEATURES Mobile Power Dedicated Single Chip Solution for Mobile Power Standalone Battery Charger with USB Output with Minimal Component Count 5V/1.5A Constant Output Current Limit in Boost Mode GENERAL DESCRIPTION 1.5A Switching Charger Limit ACT2801/ACT2801B is a space-saving and high- Programmable 4.1V to 4.35V Battery Voltage performance low-profile single-chip solution for backup 95% Boost Efficiency (Vbat=4.1V) battery pack and standalone battery charger. Adaptive to 10mA-2400mA Input Sources ACT2801/ACT2801B integrates all the functions that a Battery Disconnection at Output Short backup battery pack needs, including switching charger, <10A Low Battery Leakage Current at HZ Mode boost converter and LED indication. During Storage ACT2801/ACT2801B operates at 1.1MHz for switching Boost Auto Turn-off at No Load and Push Button charger and 0.55MHz for boost converter allowing tiny Turn-on external inductor and capacitors. ACT2801/ACT2801B Battery Over Current, Over Voltage, Over provides a direct power path from input to output with Temperature and Short Circuit Protections programmable current limit while providing power to Boost Auto Startup with Load Detection switching charger. Output has higher priority than Up to 2.0A Input Current Limit with Prioritized Power battery charger if the programmed input current limit is Path to Output reached. 5V+/-100mV Output Voltage in Boost Mode ACT2801/ACT2801B charges battery with full cycle of 1.1MHz/0.55MHz Switching Frequencies preconditioning, fast charge with constant current and 2.2uH SMD Inductor and Low-Profile Ceramic constant voltage until end of charge. The battery Capacitor charger is thermally regulated at 110C with charge 4 LEDs Battery Level and Status Indication current foldback. Battery Impedance Compensation Full Cycle of Battery Charge Management ACT2801/ACT2801B boost converter steps battery Preconditioning, Fast Charge, Top off and End voltage up to 5V. Boost converter features high of Charge efficiency, constant current regulation, short circuit Charge Current Foldback at 110C Die Temperature protection and over voltage protection. IC Over Temperature Protection at 160C ACT2801/ACT2801B provides 3.5mA constant currents QFN4x4-24 Package to drive 4 LEDs to indicate battery level and charge Vbat Vin Vout LED1 LED2 LED3 LED4 BAT VIN VOUT RIMC TH BLVS Vbat ACT2801 SW PB L1 2.2uH Rcs R7 PB CSP 2.7 50m C3 22F C1 PGND CSN AGND HZ BTV ILIM IOST ICST 10V 4.7uF NTC 10V C2 R3 R4 R1 R2 22uF R5 R6 25k 1.5k 97.6k 39k 10V 100k 60k GND APPLICATIONS status. Battery impedance is compensated for battery level indication. Backup Battery Pack Data Sheet Rev. J, January 2020 Subject to change without notice 1 of 25 www.qorvo.com 2020 Qorvo US, Inc. All rights reserved. ORDERING INFORMATION LEDS LATCH BOOST PB TURN ALWAYS OFF AT LIGHT PART NUMBER OUTPUT FLASHLIGHT OFF PACKAGE ON IN BOOST LOAD BOOST BOOST UVLO OFF TIME ACT2801QL-T1028 5V/1.5A No Yes No Yes 16s QFN44-24 ACT2801BQL-T1028 5V/1.5A Yes No Yes Yes 16s QFN44-24 PIN CONFIGURATION