BQ24168YFFR

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The BQ24168YFFR, which belongs to the battery charger family in the integrated power management IC (PMIC) portfolio, is a single-input with switchmode current source designed for battery-charging applications. Built on a highly integrated platform, this battery charger is capable of supporting up to 10A charging current for its Li-ion chemistry batteries. It also employs low voltage dropout circuitry to generate its regulated current with minimum energy losses along with a precision current limit reference voltage. It also features an I2C interface to monitor the system status, and has support for 64 byte EEPROM.

The BQ24168YFFR is suitable for a wide variety of applications such as mobile phones, portable media players, personal digital assistants, digital cameras, netbooks and navigation systems. These devices require a safe and reliable power supply to perform efficiently, and the built-in circuit protection mechanisms of the BQ24168YFFR reduce the chances of over-charging and short-circuiting.

The BQ24168YFFR uses a synchronous buck converter for step-down conversion from the input voltage to the charger output voltage. This is accomplished by using a voltage multiplier circuit with the buck converter, which drives a MOSFET switch during the on period of each switching cycle. The duty cycle of the MOSFET switch is determined by an average current-mode control with a slope compensation by an internal slope generator. Additionally, the BQ24168YFFR also has an adjustable voltage limit, which stores its error limitation into an EEPROM for future use.

The BQ24168YFFR also has two additional outputs, which are the LDO output and the Buffer output. The LDO output is generated by a DC-to-DC boost converter which can generate up to 1.2A output current. The Buffer output is generated by a voltage conversion circuit that allows dynamic voltage adjustment below the level of the LDO output. The voltage conversion is done through the use of a capacitor and a transistor, both of which are embedded in the BQ24168YFFR.

Lastly, the BQ24168YFFR features an adjustable over-voltage protection threshold that helps to protect the battery from excessive charging. It also has an adjustable soft-start time, which helps to reduce inrush current at the start of the charging cycle. Furthermore, the BQ24168YFFR also supports sleep mode and shutdown mode for improved system efficiency.

In conclusion, the BQ24168YFFR is an integrated power management IC that is optimized for battery-charging applications. It offers a highly integrated platform with several circuit protection mechanisms to ensure safe charging. Additionally, its adjustable voltage limits, over-voltage protection, soft-start time and sleep/shutdown modes make it an ideal choice for portable electronic devices.

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