MAX25605
6-Switch Sequential LED Controller For Automotive Lighting Systems
Design Sequential Turn Applications Without the Need of a Microcontroller or Software
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Overview
Features and Benefits
- Flexible Dimming Configuration Provides Optimal Performance without a Microcontroller or Software
- Simple Resistor Programming for Sequence Timing and Direction.
- Hazard Light Applications
- Sync Pin Allows Sequencing of up to 16 Devices
- Optional Logarithmic LED Fade
- Flexible Configuration Allows the Use of the Same Device in Different Applications
- One, Two, or Three Series LEDs per Switch
- Floating Source MOSFETs
- EMI Reduction
- Spread-Spectrum Oscillator
- Slew Rate Control Minimizes LED Current Spikes
- Protection Features and Package Improve Reliability
- Single-LED Short, Open, and Open-Trace Detection
- Thermal Shutdown and Fault Flag
- Automotive Ready
- AEC-Q100 Qualified
- -40°C to +125°C Operating Temperature Range
Product Details
The MAX25605 is a six-channel automotive sequential LED controller. The device implements a sequential turn function or any other sequential light animation without the use of a microcontroller or software. The MAX25605 integrates six cascoded low RDSON n-channel MOSFETs suitable for LED lighting applications up to 750mA. Each switch supports up to three series LEDs per switch. The entire LED string voltage supported is up to 60V. The n-channel MOSFETs are divided into two groups of three, allowing a single device to sequence either one or two strings of LEDs. Integrated gate drivers and level shifters for the switches are supplied by an internal charge-pump regulator, supporting buck-boost and boost-to-battery applications, in addition to ground-referenced LED driver topologies.
Sequencing functionality and timing is programmed by connecting resistors to the A0, A1, A2, and CLK inputs. Programming options include: dimming up/down, short LED threshold, multi-device sequence position, dimming frequency, and fade duration. The optional logarithmic fade feature allows for gradually turning the LEDs on or off. The sequence can be disabled by pulling the enable input low. With EN pulled low, the switches are open and the LED driver current flows through the entire LED string. Each switch also integrates single-LED fault detection, asserting a fault flag in case of shorted LEDs, open LEDs, or open wires between the sequencer and the LED string. Additionally, up to 16 devices can be sequenced together through the use of a SYNC input.
The MAX25605 operates over the -40°C to +125°C automotive temperature range and is available in a 20-pin 4mmx4mm side-wettable TQFN and a 20-pin TSSOP package with exposed pad.
Applications
- Hardware-Based Lighting Animation
- Sequential Turn Signal Lights
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
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Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX25605ATP/VY+ | Material Declaration | Reliability Data | 20-LFCSP_SS-4X4X0.75 | |
| MAX25605ATP/VY+T | Material Declaration | Reliability Data | 20-LFCSP_SS-4X4X0.75 | |
| MAX25605AUP/V+ | Material Declaration | Reliability Data | 20-TSSOP_4.4-4.4_MM | |
| MAX25605AUP/V+T | Material Declaration | Reliability Data | 20-TSSOP_4.4-4.4_MM | |
| Wafer Fabrication Data |
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.