Overview
Description
The ISL97636 is an integrated power LED driver that controls 8 channels of LED current for LCD backlight applications. The ISL97636 is capable of driving typically 72 (8x9) pieces of 3. 5V/30mA or 80 (8x10) pieces of 3. 2V/20mA LEDs. The ISL97636's contains 8 channels of voltage controlled current sources with typical currents matching of ±1%, which compensate for the non-uniformity effect of forward voltages variance in the LED stacks. To minimize the voltage headroom and power loss in the typical multi-strings operation, the ISL97636 features a dynamic headroom control that monitors the highest LED forward voltage string and uses its feedback signal for output regulation. The LED brightness can be pulse width modulated with an applied PWM signal from DC to audio noise free 20kHz. The ISL97636 features extensive protection functions that include string open and short circuit detections, OVP, OTP, thermal shutdown and an optional input overcurrent protection with master fault disconnect switch. Available in the 24 Ld 4mmx4mm QFN, the ISL97636 operates from -40°C to +85°C with input voltage ranges from 6V to 24V for high LEDs count applications.
Features
- 8 Channels
- 6V to 24V Input
- 34.5V Output Max
- Drive Maximally 72 (3.5V/30mA each) or 80 (3.2V/20mA each) LEDs
- Current Matching ±1% Typ
- Dynamic Headroom Control
- PWM Signal up to 20kHz Dimming
- Protections
- String Open Circuit Detection
- String Short Circuit Detection with Selectable Thresholds
- Over-Temperature Protection
- Overvoltage Protection
- Optional Input Overcurrent Protection w/Disconnect SW
- 1.2MHz Switching Frequency
- 24 Ld 4mmx4mm QFN Package
- Pb-Free (RoHS compliant)
Comparison
Applications
Applications
- Notebook Displays LED Backlighting
- LCD Monitor LED Backlighting
- Automotive Displays LED Backlighting
- Automotive or Traffic Lighting
Documentation
= Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 1.11 MB | |
| Brochure | PDF 8.73 MB | |
| End Of Life Notice | PDF 1.17 MB | |
| Product Change Notice | PDF 326 KB | |
| Product Change Notice | PDF 398 KB | |
| Manual - Development Tools | PDF 133 KB | |
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Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
| QFN | Tube | 750 | ||
| QFN | Reel | 6000 | ||
| QFN | Reel | 1000 |
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