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Product Detailed Parameters
- Description：IC LED DRV RGLTR I2C 18DSBGA
- 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：3
- Voltage - Supply (Min)：2.7V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：-
- Current - Output / Channel：30mA
- Frequency：1.25MHz
- Dimming：I2C
- Applications：Backlight
- Operating Temperature：-30°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：18-WFBGA
- Supplier Device Package：18-DSBGA
- Grade：-
- Qualification：-
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Overview
The LM2755TMX/NOPB is a charge pump LED controller featuring an I2C-compatible interface, designed for driving three LEDs with a total output current of up to 90 mA. It operates within a supply voltage range of 2.7 V to 5.5 V and utilizes a switching frequency of 1.25 MHz. The device employs a DSBGA-18 package and supports PWM dimming. It includes internal soft-start and over-temperature protection mechanisms, functioning efficiently without inductors by selecting appropriate charge pump gains.
Feature Summary
- I2C-compatible programmable interface for adjusting LED current waveforms and timing parameters
- Inductor-less charge pump topology that automatically selects gain for maximum efficiency
- Internal soft-start circuitry to eliminate startup surge currents
- Exponential brightness distribution across 32 levels to match human eye response
Applications
- Indicator LEDs
- Keyboard LED backlighting
- Display LED backlighting
- Fun lighting LEDs
Procurement Notes
Verify the specific suffix 'TMX' indicates tape and reel packaging when sourcing components. Confirm RoHS compliance status through official manufacturer documentation or certified datasheets. Ensure the ordering part number matches the required package type and environmental specifications for your assembly process.
Selection Notes
Select this component for applications requiring precise digital control of multiple LED channels via I2C. It is suitable for designs needing efficient power management without inductors. Consider the DSBGA-18 package size constraints and thermal requirements. Verify input voltage compatibility with the 2.7 V to 5.5 V operating range.
Part Context
This part belongs to the LM2755 family of charge pump LED controllers manufactured by Texas Instruments. It is specifically the tape and reel variant (indicated by TMX) of the standard LM2755 device. The NOPB suffix denotes lead-free construction and compliance with RoHS standards.
Replacement Considerations
Check for direct substitutes within the LM2755 family, such as LM2755T/NOPB, ensuring package and reel differences are accounted for. Verify functional equivalence if considering other TI LED drivers with similar channel counts and I2C interfaces.
