Application Notes: AN_SY6990
Wide Input, High current, Bi-directional Regulator for Single Cell Li-Ion Battery Power Ban...
Application Notes: AN_SY6990
Wide Input, High current, Bi-directional
Regulator for Single Cell Li-Ion Battery Power Bank Application
Advanced Design Specification
General Description
SY6990 is a 4.0-13.5V input, bi-directional
regulator for Li-Ion battery power bank application. Advanced bi-directional energy flow control with automatic input power source detection is adopted to achieve battery charging mode and battery power supply mode alternately. If the external power supply is present, SY6990 runs in battery charging mode with fully protection function. If the external power supply is absent, SY6990 runs in battery power supply mode with output current capability up to 3A.
SY6990 has an integrated reverse blocking switch to prevent from current leaking from the system side or battery side to the input side and an integrated linear switch to achieve over voltage/current protection at the system side. A half bridge with quasi-fixed 0.5MHz switching frequency is integrated to achieve power conversion for battery charging mode and battery power supply mode. All of them adopt N-channel MOSFETs with 16V rating and extremely low RDS(ON) to optimize operation efficiency and extend battery life-time. SY6990 is available in QFN4x4 package to minimize the PCB layout size for wide portable applications.
Ordering Information
SY6990 ( ) □ □□ □ Temperature Code Package Code Optional Spec Code
Ordering Number Package type
SY6990QCC
QFN4x4-24
Note
Features
Integrated N-Channel ...