ISL97687IRTZ-T

Voltage - Output:	--
Base Part Number:	ISL97687
Supplier Device Package:	28-TQFN-EP (5x5)
Package / Case:	28-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 105°C (TA)
Applications:	Backlight
Dimming:	Analog, PWM
Frequency:	200kHz ~ 1.2MHz
Current - Output / Channel:	160mA
Series:	--
Voltage - Supply (Max):	32V
Voltage - Supply (Min):	9V
Number of Outputs:	4
Internal Switch(s):	No
Topology:	Step-Up (Boost)
Type:	DC DC Controller
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

ISL97687IRTZ-T is a power management integrated circuit (PMIC), which is designed for LED driver applications. It is used in applications for backlighting display modules such as type LCDs, OLEDs and plasma displays. It is designed for low power, high efficiency and ease of use. It can drive up to 10A current from its integrated boost/buck converter and up to 14 LEDs from its integrated LED lighting driver.

Application Field

The ISL97687IRTZ-T is specifically designed for lighting applications, including those requiring both linear and high efficiency switching modes. In addition, it is suitable for automotive, industrial and portable applications. The ISL97687IRTZ-T is able to drive up to 10A of current for LED applications and up to 100mA for other applications. The ISL97687IRTZ-T features integrated linear and switching regulators which are designed to meet the needs of various LED applications with an output up to 14 LEDs. It also provides an adjustable output voltage range of between 3V and 14V. The ISL97687IRTZ-T has efficient power conversion stages which enable increased power efficiency and extended LED lifetime while using a minimum amount of power. The ISL97687IRTZ-T is designed to be used in battery powered applications with low power consumption. It is also compliant with RoHS and BearPAW standards. It provides protection against excessive over-current, reverse polarity, and thermal runaway, making the device suitable for automotive, industrial and consumer applications.

Working Principle

The ISL97687IRTZ-T consists of two separate sections that are integrated into one PMIC. The first section is a boost/buck converter which provides adjustable output voltage from 3V to 14V. The converter is designed for low power applications such as driving LEDs with maximum efficiency. When the power is applied, the boost/buck converter turns on to create an adjustable output voltage from 3V to 14V. Additionally, the converter can operate in discontinuous mode in which it turns off when no current is needed for the load and turns on again when needed. This helps to optimize power efficiency and reduce power consumption.The second section of the ISL97687IRTZ-T is the integrated LED driver. The LED driver is designed to provide clean and efficient power conversion by utilizing a multi-stage architecture. In the multi-stage architecture, the circuit will first start out in buck mode to ensure constant output voltage and power consumption, then switches to boost mode over higher load current ranges. This ensures that efficient and clean power conversion is achieved. Additionally, the LED driver provides protection against over current, reverse polarity, and thermal runaway.

Conclusion

The ISL97687IRTZ-T PMIC is a low power, high efficiency LED driver designed for LED applications requiring both linear and high efficiency switching modes. It has an adjustable output power range from 3V to 14V and can drive up to 10A current from its integrated boost/buck converter and up to 14 LEDs from its integrated LED lighting driver. It is compliant with RoHS and BearPAW standards and provides protection against excessive over-current, reverse polarity and thermal runaway making it suitable for automotive, industrial and consumer applications.

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