LM27964SQ-A/NOPB

Overview

The LM27964SQ-A/NOPB is a white LED driver system manufactured by Texas Instruments, designed for LED lighting applications. It features seven independent outputs with a maximum output current of 180 mA per channel. The device utilizes a buck topology and operates within an input voltage range of 2.7 V to 5.5 V. It supports I2C control interfaces for configuration and dimming. The component functions at switching frequencies between 500 kHz and 900 kHz. It is housed in a WQFN-24 package and is rated for operation temperatures from -30°C to +85°C.

Feature Summary

• Integrates seven independent constant-current channels for multi-LED configurations
• Supports I2C compatible digital control for precise regulation and dimming
• Utilizes buck topology for efficient power conversion within low voltage ranges

Applications

• White LED lighting systems
• General illumination drivers
• Multi-zone LED backlighting

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's latest documentation to confirm pinout compatibility and functional equivalence with standard variants. Ensure the ordering code includes '/NOPB' if lead-free compliance is required. Cross-reference the datasheet revision date to validate electrical characteristics against current production standards before finalizing procurement specifications.

Selection Notes

Select this component when designing circuits requiring multiple independent LED channels controlled via a serial interface. The buck topology is suitable for input voltages up to 5.5 V. Consider the thermal performance of the WQFN-24 package for high-density layouts. Verify that the application environment falls within the specified operating temperature range of -30°C to +85°C.

Part Context

This part belongs to the LM27964 series of LED drivers from Texas Instruments. It is distinct from other series members like the LM27966, which uses a charge pump topology and offers six outputs. The LM27964 specifically addresses applications needing seven channels with buck-based regulation, differentiating it from capacitive or boost-based alternatives in the same product family.

Replacement Considerations

LM27964SQ-A/NOPB serves as the direct replacement for the discontinued LM27964SQ-A.