ISL9519HRTZ-T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Lithium-Ion
Number of Cells:	1 ~ 3
Current - Charging:	--
Programmable Features:	--
Fault Protection:	Short Circuit
Charge Current - Max:	8A
Battery Pack Voltage:	--
Voltage - Supply (Max):	22V
Interface:	I²C
Operating Temperature:	-10°C ~ 100°C (TA)
Package / Case:	28-WFQFN Exposed Pad
Supplier Device Package:	28-TQFN (4x4)
Base Part Number:	ISL9519

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Introduction

The ISL9519HRTZ-T is a low-voltage, high-current power management integrated circuit (PMIC) from Intersil. This PMIC is designed to be used in a wide range of applications such as handheld and portable devices, including medical, industrial, and telecommunications equipment. The ISL9519HRTZ-T provides high-efficiency, constant-current/constant-voltage (CC/CV) charge control and two independent regulated power outputs.

Application Field

The primary application for the ISL9519HRTZ-T is in battery charging. The high-current, constant-voltage/constant-current charge control ensures that connected batteries receive an appropriate amount of charge. The precise regulation and maximum current limits eliminate the possibility of overcharge or over-discharge, which can cause degradation or shortening of battery life.In addition to its primary application as a battery charger, the ISL9519HRTZ-T can be used as a high-efficiency power supply or voltage regulator. Its two independent regulated outputs can provide precise voltage regulation on either side of a system, improving system efficiency and power consumption.

Working Principle

The ISL9519HRTZ-T is composed of two main parts – the power switch and the regulation control logic. The power switch includes MOS transistors that can be used to regulate the charge current going into the battery. The regulation control logic includes an integrated circuit (IC) providing constant-voltage/constant-current (CV/CC) charge control with an adjustable maximum charge current.The power switch is controlled by the regulation circuit. When the voltage detected at the battery terminal is lower than the preset charging voltage, the regulation circuit will open the power switch and start to charge the battery. When the battery reaches the set-point voltage, the regulation circuit will close the power switch and stop charging.The two regulated outputs of the ISL9519HRTZ-T use a combination of modulated pulse-width and low-dropout voltage regulators to ensure precise voltage and current regulation. This ensures that the voltage and current provided by each output is held within a few tens of millivolts of the set-point, ensuring the efficient operation of the system.

Conclusion

The ISL9519HRTZ-T is a low-voltage, high-current PMIC designed for battery charging applications. It provides precise constant-voltage/constant-current (CV/CC) charge control and two independent regulated power outputs for efficient power supply and voltage regulation. With its power switch and regulation control logic, the ISL9519HRTZ-T can provide maximum current limits and eliminate the possibility of overcharge or over-discharge. It is ideal for use in handheld and portable devices such as medical, industrial, and telecommunications equipment.

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