LED String Fault Monitoring IC
The AAL406 is a high precision LED fault detection/management chip intended to monitor strings of LEDs. It can be used standalone or in combination with additional AAL406 chips (for longer strings) and/or with the IPS402/AAL403 control chips. It includes open LED fault sensing, a bypass ‘switch’ for open LEDs, and a fault input pin to enable daisy-chaining multiple chips. The bypass ‘switch’ allows strings to continue operating when an LED fails in the open state.
Features
- Open and short LED sensing
- Latching ‘crowbar’ across open LEDs (400mA typical, higher currents achievable dependent on thermal management)
- Supports three LEDs
- In/Out fault sensing daisy-chain support
- Compatible with IPS402/AAL403 for constant current in linear or switching applications.
- Thermally enhanced package allows for high power in a small footprint
- Compatible with PWM brightness control
Applications
- AC/DC LED Driver Applications
- DC/DC LED Driver Applications
- RGB backlighting
- Backlighting of LCD and PDP panels
- LED signs
- LED decoration
- Automotive
- Road signs, traffic lights
Ordering Information | Ordering PN(1) | Subgroup | Description | Temp. Range | Package | Packing Type | Packing Qty | | AAL406 A-S8B-G-LF | Monitoring and Interface | LED String Fault Monitoring
| Automotive | 8-Pin SOIC Thermal Pad | Tube | 98 | | AAL406 A-S8B-G-LF-TR | Monitoring and Interface | LED String Fault Monitoring | Automotive | 8-Pin SOIC Thermal Pad | 13” T&R (2) | 2500 |
(1) Only RoHS/Lead-Free Packaging is normally offered.
( (2) T&R - Tape and Reel
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Download the application note
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