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Product Detailed Parameters
- Description：IC AMP CLASS
- Series：-
- Mfr：Renesas Electronics Corporation
- Package：Bulk
- Type：-
- Topology：-
- Internal Switch(s)：-
- Number of Outputs：-
- Voltage - Supply (Min)：-
- Voltage - Supply (Max)：-
- Voltage - Output：-
- Current - Output / Channel：-
- Frequency：-
- Dimming：-
- Applications：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The ISL97635IRZ is an SMBus-controlled LED driver designed for LCD backlight applications. It features eight channels of voltage-controlled current sources with typical current matching of ±1%. The device supports a 6V to 24V input and can drive up to 80 LEDs at 3.2V/20mA or 72 LEDs at 3.5V/30mA. It includes dynamic headroom control, selectable switching frequencies of 600kHz or 1.2MHz, and comprehensive protection mechanisms including over-temperature, overvoltage, and short-circuit detection. The component is housed in a 24 Ld (4mmx4mm) QFN package.
Feature Summary
- SMBus interface for digital control of dimming and configuration
- Dynamic headroom control to minimize voltage headroom and power loss
- Multiple dimming methods including SMBus PWM, external PWM, and DC input
- Integrated protections for string open circuit, short circuit, and over-temperature
Applications
- LCD backlight drivers
- Multi-string LED arrays
- Display power saving technology implementations
Procurement Notes
Verify the exact suffix against official Renesas documentation, as standard datasheets typically list ISL97635IRZ. Confirm if the specific suffix denotes a unique tape-and-reel variant or packaging specification. Check lifecycle status carefully, as this series may be obsolete or discontinued. Ensure compatibility with existing PCB footprints and thermal requirements before finalizing procurement decisions.
Selection Notes
Select this component when precise current matching across multiple LED strings is required for uniform brightness. It is suitable for designs needing flexible dimming control via SMBus or external signals. Consider the maximum output voltage capability relative to the total forward voltage of the LED stack. Evaluate the thermal performance within the QFN package for the intended operating environment.
Part Context
The ISL97635 belongs to a family of digitally controlled LED drivers from Renesas. Similar models like the ISL97673 offer different channel counts and pinouts for varied backlight needs. This specific part focuses on eight-channel precision control with SMBus integration, distinguishing it from simpler analog drivers or higher-channel industrial variants.
Replacement Considerations
Check for direct cross-reference parts in the ISL976xx series. Verify pin-to-pin compatibility and electrical parameter equivalence. Consult Renesas for updated recommendations if the original part is discontinued.
