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Product Detailed Parameters
- Description：IC LED DRV RGLTR I2C 30MA 24WQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Type：DC DC Regulator
- Topology：Switched Capacitor (Charge Pump)
- Internal Switch(s)：Yes
- Number of Outputs：6
- Voltage - Supply (Min)：2.7V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：2V ~ 4V
- Current - Output / Channel：30mA
- Frequency：1.27MHz
- Dimming：I2C
- Applications：Backlight
- Operating Temperature：-30°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：24-WFQFN Exposed Pad
- Supplier Device Package：24-WQFN (4x4)
- Grade：-
- Qualification：-
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Overview
The LM27966SQX is a discontinued charge-pump-based display LED driver from Texas Instruments. It features six independent constant-current channels, each capable of delivering up to 30 mA, for a total output current of 180 mA. The device operates on a supply voltage range of 2.7 V to 5.5 V and utilizes an I2C-compatible interface for control. Packaged in a 24-WQFN (4x4) format, it supports switching frequencies between 890 kHz and 1.57 MHz with an output voltage range of 2 V to 4 V.
Feature Summary
- Integrates six independent constant-current channels for parallel LED driving
- Utilizes I2C-compatible interface for digital control and dimming
- Employs switched-capacitor charge pump topology without requiring external inductors
Applications
- Backlighting for main mobile phone displays
- Secondary display backlighting in handheld devices
- White LED driver circuits for portable electronics
Procurement Notes
Verify component status carefully as the LM27966SQX is marked as obsolete and no longer manufactured by Texas Instruments. Confirm availability through authorized distributors or secondary markets, noting that lead times may vary significantly. Ensure compatibility with existing designs before sourcing, as direct replacement options should be evaluated against current production alternatives.
Selection Notes
Select this component only if legacy design compatibility is required, given its discontinued status. Evaluate the 24-WQFN package constraints and thermal performance for the specific application environment. Consider the I2C interface requirements for system integration and verify that the 30 mA per channel current capability meets the target LED array specifications.
Part Context
The LM27966 belongs to Texas Instruments' family of highly integrated charge-pump LED drivers designed for display applications. It serves as a specialized solution for driving multiple white LEDs in parallel within space-constrained portable devices. The series emphasizes compactness and digital control via I2C, targeting consumer electronics manufacturers requiring efficient backlighting solutions.
Replacement Considerations
The LM27966SQX/NOPB is listed as a direct substitute for the LM27966SQX. Verify pinout and electrical parameter compatibility before implementation. Consult official documentation to confirm functional equivalence and ensure the replacement part meets all original design specifications.
