ISL97900CRZ

Voltage - Output:	5.5V
Base Part Number:	ISL97900
Supplier Device Package:	28-QFN (4x5)
Package / Case:	28-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Applications:	--
Dimming:	I²C
Frequency:	2.5MHz
Current - Output / Channel:	500mA
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	2.8V
Number of Outputs:	3
Internal Switch(s):	Yes
Topology:	Step-Down (Buck), Step-Up (Boost)
Type:	DC DC Regulator
Part Status:	Active
Packaging:	Tube

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ISL97900CRZ LED Drivers

The ISL97900CRZ is an LED driver developed by Intersil Corporation, which is a combination of current modes of buck-boost DC / DC conversion found in other LED drivers. The main features of this LED driver include a wide input voltage range of 3.3V to 15V, current protection, and a low stand-by current of 2mA. It is suitable for a large range of applications, from automotive headlight control to general LED lighting control.

Application Fields

The ISL97900CRZ LED driver is mainly used for powering and controlling LEDs in automotive and general lighting applications. Its wide input voltage range allows it to work effectively with cars as well as other applications where the input voltage is lower than other driver\'s ranges. It is especially suitable for lighting applications that have tight space restrictions and need a driver with minimal quiescent current draw, such as warehouses and other areas where maximal energy efficiency is desired.

Working Principle

The ISL97900CRZ takes advantage of both buck-boost and constant current modes of DC/DC conversion to ensure maximum efficiency and highly accurate control of the connected LEDs. This driver is designed with a number of efficiency-enhancing features, such as the Analog Dimming Control Pins to control the LED brightness or duty cycle and the Oscillator Frequency Adjustment to adjust the switching frequencies for higher efficiency. The driver also integrates over-voltage protection and current-sense input to protect the power supply and connected LEDs from damages due to any voltage or current over-/under-shoots. To ensure precise LED current control, the ISL97900CRZ contains an advanced LED current monitor with a wide threshold range of 0.1V to 1V and a precise LED current control accuracy of 0.5%. In addition, this buck-boost LED driver includes an adjustable Under Voltage Lockout (UVLO), an adjustable soft-start slew rate, and over-temperature protection features to provide the safety and reliability needed in an automotive or commercial LED lighting application.

Conclusion

The ISL97900CRZ is a highly efficient, accurate and reliable LED driver, designed to provide a simple solution for automotive and general lighting applications. With its wide input voltage range, current protection, and low quiescent current draw, it offers great flexibility and energy savings for a variety of applications. The advanced LED current monitors, over voltage protection, current sense input and built-in safety features make it a perfect choice for maximizing efficiency and protecting people and equipment in automotive and private lighting applications.

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