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The following are detailed specifications for the A6271-1 chip:
- Features:
- Certified to AEC-Q100 standards, suitable for automotive high-power LED constant-current drive.
- Supports input voltages from 4.2V to 50V, with a maximum LED string voltage of up to 53.3V.
- Configurable as a boost, buck-boost, buck, or SEPIC switch converter.
- Features a programmable switching frequency (70 to 700 kHz), supporting external PWM, internal PWM, and analog dimming.
- Utilizes frequency jittering to reduce electromagnetic interference (EMI), compliant with CISPR 25 EMI standards.
- Provides comprehensive fault protection and fault indication features, including under-voltage, over-temperature, LED overload, and output under-voltage protection.
Technical Specifications
- Package type: 16-pin eTSSOP
- Number of pins: 16 pins
- Operating voltage range: 4.2V to 50V
- Maximum LED string voltage: 53.3V
- Switching frequency: Programmable, 70kHz to 700kHz
- Operating temperature range: -40°C to +150°C (automotive grade)
- Maximum junction temperature: 150°C
- Storage temperature range: -55°C to +150°C
- Thermal resistance:
- On a 4-layer PCB: 34°C/W
- On a 2-layer PCB (3.8 square inches of copper area per side): 43°C/W
- Junction to heat sink: 2°C/W
Notes
- Compatibility: Before purchasing, please confirm that the chip is compatible with your application.
- Installation instructions:
- Ensure that the power supply voltage meets the chip specifications.
- Use appropriate decoupling capacitors to reduce noise.
- Operate the device within the specified temperature range.
- Technical Support: For further technical support, contact the supplier or manufacturer.
Summary
The A6271-1 is a high-performance automotive high-current LED controller produced by Allegro MicroSystems, suitable for a variety of automotive electronic applications, particularly excelling in automotive lighting systems. Its wide operating voltage range, low electromagnetic interference, and multiple protection features make it highly practical and reliable in automotive electronic systems.
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