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Product Detailed Parameters
- Description：IC LED DRV RGLTR I2C 30MA 24WQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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 LM27966SQ/NOPB is a white LED driver IC from Texas Instruments featuring six constant current outputs. It utilizes a charge pump topology with an input voltage range of 2.7 V to 5.5 V and output voltages between 2 V and 4 V. The device supports I2C control for brightness regulation and operates at frequencies from 890 kHz to 1.57 MHz. Each channel delivers up to 180 mA, with a maximum supply current of 3.32 mA. It is housed in a WQFN-24 package and functions within a temperature range of -30°C to +85°C.
Feature Summary
- Six independent constant current channels for multi-string LED driving
- I2C compatible interface for digital brightness control and configuration
- Integrated charge pump topology eliminates external inductors
- Wide operating input voltage range suitable for battery-powered applications
Applications
- White LED backlighting systems
- Portable electronic device illumination
- Multi-zone LED lighting arrays
Procurement Notes
Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and thermal characteristics. Ensure that the WQFN-24 package requirements align with your PCB layout constraints. Cross-reference the RoHS status and manufacturing origin with the latest datasheet revisions before finalizing procurement orders.
Selection Notes
Select this component when designing circuits requiring multiple regulated LED strings without magnetic components. The integrated charge pump simplifies board space compared to inductive solutions. Verify that the required per-channel current does not exceed the 180 mA limit and that the system voltage remains within the specified 2.7 V to 5.5 V window for optimal efficiency.
Part Context
This part belongs to the LM27966 series of LED drivers designed for portable applications. It serves as a solution for driving multiple white LEDs in devices where size and efficiency are critical. The series differentiates itself through digital control capabilities and high integration levels compared to discrete LED driver designs.
Replacement Considerations
Direct substitutes include other variants within the LM2796x family, such as the LM27964 or LM27965, provided the number of outputs and current ratings match the design requirements. Always verify electrical specifications and pin compatibility before swapping.
