ISL88731HRZ-T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Lithium-Ion
Number of Cells:	1 ~ 4
Current - Charging:	Constant, Pulsed
Programmable Features:	--
Fault Protection:	Short Circuit
Charge Current - Max:	8A
Battery Pack Voltage:	16.8V
Voltage - Supply (Max):	26V
Interface:	I²C
Operating Temperature:	-10°C ~ 100°C (TA)
Package / Case:	28-WFQFN Exposed Pad
Supplier Device Package:	28-TQFN-EP (5x5)
Base Part Number:	ISL88731

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PMIC (Power Management Integrated Circuit) solutions have long been the backbone of modern electronic applications. ISL88731HRZ-T is a PMIC targeting battery charging devices and solutions. This variety of PMIC offers a comprehensive set of features and functionality, making it suitable for a wide range of applications. ISL88731HRZ-T is a highly versatile and efficient multi-chemistry battery charger controller IC, targeted for space-constrained automotive, industrial and heavy duty applications. It is a fully-featured and integrated charger specifically designed for a wide range of battery chemistries and charging requirements. This PMIC can support up to 2 cells, and delivering up to 1.5A total charging current and allowing the parallel use of two chargers in series for triple cell batteries. In addition, it is capable of detecting the system voltage, thermal conditions and full-charge state of the battery. More importantly, this IC offers a high level of integration which enables system designers to minimize cost and space. By integrating safety and protection functions with additional system side control, the ISL88731HRZ-T reduces the number of external components and simplifies battery charger design. In order to understand the operating principle of the ISL88731HRZ-T, it is important to note that it features an adaptive multi-chemistry charging architecture. The ISL88731HRZ-T combines multiple advanced IC functionalities including: a CV/CC (constant voltage/constant current) regulator, a programmable smart charge termination, voltage and current limiting, programmable battery temperature monitoring, active cell balancer and a pre-charge with soft-start. The ISL88731HRZ-T includes an integrated load line resistor network, which allows the user to control output voltage as well as provide a stable output current/voltage during charge or discharge. Additionally, the integrated regulators provide dynamic load balancing between two cells when they are in parallel. This helps to reduce overall system power consumption by ensuring the batteries are kept balanced when in the CV (constant voltage) state. The charger controller also incorporates a pre-charge algorithm to account for undervoltage conditions and protect the battery from overcharging and overdischarge. This feature avoids damage to the battery and reduces the number of external components required for pre-charging. It also provides fast charging time and programmable pre-charge duration, with time accurate to within a millisecond.The ISL88731HRZ-T is designed with a voltage-based termination algorithm and two user-defined termination thresholds. This ensures the maximum charge is efficiently applied to the battery while maintaining safety, prolonging the battery\'s life. The IC also features over temperature, reverse current, and over voltage protection to prevent battery damage.To summarize, the ISL88731HRZ-T is suitable for a variety of applications due to its high level of integration and wide range of features. It offers system designers versatility and flexibility in the design of battery charging solutions. With a range of safety functions built in, this PMIC ensures the highest level of performance and reliability possible.

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