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Product Detailed Parameters
- Description：LOW NOISE WHITE LED CONSTANT CUR
- Series：*
- Mfr：National Semiconductor
- 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 LM2793LDX/AULF is a low noise white LED constant current supply featuring dual function brightness control. Manufactured by National Semiconductor, this integrated circuit is designed for driving white LEDs with high precision and minimal electrical interference. It integrates the necessary boost converter and current regulation components into a compact package suitable for portable electronic applications requiring efficient backlighting solutions.
Feature Summary
- Low noise operation for clean LED drive
- Dual function brightness control capability
- Integrated constant current supply architecture
Applications
- White LED backlighting in portable devices
- Mobile phone display illumination
- Handheld instrument indicator lighting
Procurement Notes
Verify the manufacturer designation as National Semiconductor or Texas Instruments, as TI acquired NS. Confirm the specific suffix AULF corresponds to the required package type and tape-and-reel configuration. Ensure RoHS compliance status matches project requirements, noting that some listings may indicate varying compliance states depending on production batch dates.
Selection Notes
Select this component when low electromagnetic interference is critical for the LED application. The dual function brightness control allows for flexible interface options with host processors. Consider the input voltage range and output current requirements of the target LED string to ensure compatibility with the internal boost converter capabilities.
Part Context
This part belongs to the LM2793 family of LED drivers from National Semiconductor. It is distinct from other variants like the LM27953 which features different sink configurations. The device represents a specialized solution for white LED applications where noise performance and control flexibility are prioritized over multi-channel independent dimming.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify pin-to-pin compatibility with any potential alternatives through official datasheet comparison before implementation.
