RichTek Technology Corporation PMIC - PMIC - Battery Management - RT9709BGQWB RT9709BGQWB

The RT9709BGQWB is an integrated circuit designed for battery management, providing essential protection features for low voltage systems. It safeguards against over-voltage conditions, capable of handling input voltages up to 28V. The IC monitors input voltage, battery voltage, and charging current, ensuring all parameters remain within safe limits. It includes a thermal protection feature that disables the MOSFET if the chip temperature exceeds 140¬8C. The device supports both AC and USB chargers, and it can quickly turn off the MOSFET within 1 microsecond if the input voltage surpasses the over-voltage protection (OVP) threshold. The over-current protection (OCP) can be set using an external resistor, and the IC features a binary counter that disables the MOSFET after 16 OCP events unless power is recycled. Additionally, it monitors battery voltage and will turn off the MOSFET if the voltage exceeds 4.4V for more than 180 microseconds. The RT9709BGQWB is housed in a thermally enhanced WDFN package, is RoHS compliant, and is suitable for applications in cellular phones, digital cameras, PDAs, and portable instruments.