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Product Detailed Parameters
- Description：IC LED DRV RGLTR PWM 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：7
- Voltage - Supply (Min)：2.7V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：-
- Current - Output / Channel：20mA
- Frequency：500kHz
- Dimming：PWM
- 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 LM2796TLX/NOPB is a Texas Instruments LED driver IC designed for dual-display white LED applications. It utilizes a switched capacitor (charge pump) topology to regulate current. The device operates within an input voltage range of 2.7V to 5.5V and supports PWM dimming control. It features a maximum output current of 20mA per channel with seven outputs. The component functions at a switching frequency of 500kHz and is housed in a compact 18-DSBGA package. It is rated for an operating temperature range from -30°C to +85°C.
Feature Summary
- Integrates a charge pump topology for efficient DC-DC conversion without requiring external inductors.
- Supports direct PWM dimming for precise brightness control of connected LEDs.
- Provides regulated constant current output suitable for driving multiple LED strings.
Applications
- Dual-display backlighting systems
- White LED driver circuits
- Portable electronic devices requiring multi-channel LED regulation
Procurement Notes
Verify the specific suffix 'TLX' indicates the tape-and-reel packaging configuration when sourcing. Confirm that the 'NOPB' designation ensures lead-free compliance and RoHS standards. Cross-reference the manufacturer part number against distributor listings to ensure authenticity, as availability may vary. Check for any recent product change notifications regarding manufacturing location or material composition updates before finalizing procurement orders.
Selection Notes
Select this component for designs requiring a compact solution for dual-display LED backlights. Ensure the system input voltage remains within the 2.7V to 5.5V operational window. Verify that the required LED forward voltage does not exceed the charge pump capabilities. Consider the 18-DSBGA thermal performance if high ambient temperatures are expected. Evaluate the 20mA output limit against total LED string requirements.
Part Context
This part belongs to the LM2796 family of LED lighting drivers from Texas Instruments. It is specifically engineered for portable applications needing efficient white LED management. The device complements other PMIC solutions by offering integrated power regulation and drive functionality in a small footprint, reducing overall bill-of-materials complexity for display subsystems.
Replacement Considerations
The LM2796TL/NOPB is documented as an equivalent part number. Verify pinout compatibility and electrical specifications before substitution. Ensure the alternative package variant matches the PCB layout constraints. Review datasheet revisions to confirm functional parity regarding dimming interfaces and protection features.
