ACT2802 / ACT2802B 5V/2.5A Backup Battery Pack Manager FEATURES APPLICATIONS Dedicated Single Chip Solution for Mobile Power Backup Battery Pack With Minimal Component Count Power Bank 5V/2.5A Constant Output Current Limit in Mobile Power Boost Mode Standalone Battery Charger with USB Output 2.5A Switching Charger Current Limit Programmable 4.1V to 4.35V Battery Voltage GENERAL DESCRIPTION 95% Boost Efficiency (Vbat=4.1V) ACT2802/ACT2802B is a space-saving and high-per- formance low-profile single-chip solution for backup bat- Adaptive to 10mA-2400mA Input Sources tery pack and standalone battery charger. Battery Disconnection at Output Short ACT2802/ACT2802B integrates all the functions that a <10A Low Battery Leakage Current at HZ Mode backup battery pack needs, including switching charger, During Storage boost converter and LED indication. Boost Auto Turn-off at No Load and Push Button ACT2802/ACT2802B operates at 1.1MHz for switching Turn-on charger and 0.55MHz for boost converter allowing tiny external inductor and capacitors. ACT2802/ACT2802B Battery Over Current, Over Voltage, Over Temperature and Short Circuit Protections provides a direct power path from input to output with programmable current limit while providing power to Boost Auto Startup with Load Detection switching charger. Output has higher priority than bat- Up to 3.0A Input Current Limit with Prioritized tery charger if the programmed input current limit is Power Path to Output reached. 5V+/-100mV Output Voltage in Boost Mode ACT2802/ACT2802B charges battery with full cycle of 1.1MHz/0.55MHz Switching Frequencies preconditioning, fast charge with constant current and constant voltage until end of charge. The battery 2.2uH Inductor and Low Profile Ceramic Capacitor charger is thermally regulated at 110C with charge cur- 4 LEDs Battery Level and Status Indication rent foldback. Battery Impedance Compensation ACT2802/ACT2802B boost converter steps battery Full Cycle of Battery Charge Management Precondi- voltage up to 5V. Boost converter features high effi- tioning, Fast Charge, Top off and End of Charge ciency, constant current regulation, short circuit protection and over voltage protection. Charge Current Foldback at 110C Die Temperature IC Over Temperature Protection at 160C ACT2802/ACT2802B provides 3.5mA constant currents to drive 4 LEDs to indicate battery level and charge sta- QFN4x4-24 Package tus. Battery impedance is compensated for battery level indication. Vbat Vin Vout LED1 LED2 LED3 LED4 BAT VIN VOUT RIMC TH Vbat BLVS ACT2802 SW S1 L1 2.2uH R7 Rcs 2.7 PB CSP 25m C3 2*22F PGND CSN C1 AGND HZ BTV ILIM IOST ICST 10V NTC 4.7uF C2 10V R3 R4 R1 R2 22uF R5 R6 93.1k 43.2k 25k 750 10V 80k 60k GND Data Sheet Rev. 8.0, January 20, 2020 Subject to change without notice 1 of 25 www.qorvo.com ACT2802 / ACT2802B 5V/2.5A Backup Battery Pack Manager 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 ACT2802QL-T1028 5V/2.5A No Yes No Yes 16s QFN44-24 ACT2802BQL-T1028 5V/2.5A Yes No Yes Yes 16s QFN44-24 PIN CONFIGURATION Data Sheet Rev. 8.0, January 20, 2020 Subject to change without notice 2 of 25 www.qorvo.com