ISL9221IRZ-T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	Current
Fault Protection:	Over Voltage, Reverse Current
Charge Current - Max:	1.2A
Battery Pack Voltage:	4.2V
Voltage - Supply (Max):	6.7V
Interface:	USB
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	12-VFDFN Exposed Pad
Supplier Device Package:	12-DFN (4x3)
Base Part Number:	ISL9221

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Introduction The ISL9221IRZ-T is a battery charger IC from Renesas, which enables fast and efficient charging of Li-ion and Li-Poly batteries. The ISL9221IRZ-T is incredibly versatile, and suitable for a wide range of portable applications, including mobile phones, digital cameras, gaming devices, and GPS systems. As the industry moves towards smaller, thinner form factors and lower power consumption solutions, this IC is an ideal power solution as it is designed to fit into small, space-constrained designs. Applications The ISL9221IRZ-T is a multi-functional battery charger IC that is designed for handheld and portable applications. It is compatible with both Li-ion and Li-Poly batteries and offers fast charging capability over a wide input voltage range. It is capable of handling up to 4A charging current and features an integrated negative current detection function to prevent reverse current flow. The reverse current limit is adjustable for different battery types. The ISL9221IRZ-T supports USB charging through the USB-dedicated charging port (DCP) and also USB host charging from a DCP-detecting device, such as a PC or laptop. The DCP input can be up to 15V, and is supported by an internal voltage regulator that supports up to 10V power output. The device is also designed to detect a battery\'s presence, allowing it to identify the orientation of the battery, allowing it to change charging parameters accordingly.Availabe Features The ISL9221IRZ-T is compatible with a wide range of battery types, including Li-ion and Li-Poly. It supports fast charging, with up to 4A charging current, and a range of adjustable current limits. It has an overvoltage protection circuitry and built-in over temperature protection. It also supports a range of battery temperature monitoring and smart charging features, including a start/stop battery charging function, adjustable voltage and current limits, and pulse charging for cell balancing. The integrated negative current detection ensures that there is no reverse current flow and that battery damage is prevented. The integration of an internal voltage regulator allows the DCP input voltage to be up to 15V, so the device can run from any available input voltage. It also includes a built-in reverse current protection, ensuring that the battery stays safe and does not suffer from permanent damage due to overvoltage, overcurrent, or reverse current flow.The device is also designed for ease of implementation, with adjustable charging parameters such as output voltage, charging current, and current limit. The configuration can easily be modified depending on the application, allowing users to customize the charging profile for their applications. Working Principle The ISL9221IRZ-T is a very versatile battery charger IC that is designed to meet the demands of today’s portable and handheld applications. Its purpose is to enable fast and efficient charging of Li-ion and Li-Poly batteries across a wide range of input voltage. The device contains an integrated negative current detection function to prevent reversed current flow.The device is designed to accept either USB charging through its DCP port, or if supported by a PC or laptop, it can enable USB host charging. Internally it’s equipped with an adjustable reverse current limit, which prevents overload and prevents reverse current flow from damaging the battery. This can be adjusted depending on the battery type. The device features adjustable output voltage and current limits, as well as overvoltage protection and over temperature protection, so that the battery is not damaged due to overcharge or over-discharge. The integrated start/stop charging functionality enables the device to accurately monitor the battery\'s charge status and prevent overcharge. The device is also designed to identify the battery\'s presence and detect the orientation of the battery, allowing the device to adjust charging parameters accordingly.Conclusion The ISL9221IRZ-T is a versatile and reliable battery charger IC that is designed to meet the demands of today\'s portable and handheld applications. It is a fast and efficient charger for Li-ion and Li-Poly batteries and offers adjustable charging parameters to suit the needs of different applications. It has an integrated negative current detection function which prevents reverse current flow and prevents battery damage. The device is designed to detect the battery\'s presence and adjust the charging parameters accordingly. It is compliant with USB charging standards, enabling it to charge from DCP ports, as well as from compatible USB host devices such as laptops or PCs. The ISL9221IRZ-T is a great choice for any portable or handheld application requiring a fast, reliable and space-efficient battery charging solution.

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