The RT9469 is a switch-mode single cell Li-Ion/Li-Polymer
battery charger for portable applications. It integrates a
synchronous PWM controller, power MOSFETs, input
current sensing and regulation, and high accuracy voltage
regulation and charge termination circuits. Besides, the
charging current is regulated through the integrated
sensing resistors. The RT9469 also features USB On-
The-Go (OTG) support.
The RT9469 optimizes the charging task by using a control
algorithm to vary the charge rate via different modes,
including pre-charge mode, fast charge mode, and constant
voltage mode. The key charge parameters are
programmable via the I2C interface. The RT9469 resumes
the charge cycle whenever the battery voltage falls below
an internal recharge threshold, and automatically enters
sleep mode when the input power supply is removed.资料下载
