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LP8543SQE is listed in the LED Driver IC range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is IC LED DRV RGLTR PWM 60MA 24WQFN. Review the specifications below when checking this part for your BOM.
LED Driver IC specifications for LP8543SQE
- Description：IC LED DRV RGLTR PWM 60MA 24WQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Type：DC DC Regulator
- Topology：Step-Up (Boost)
- Internal Switch(s)：Yes
- Number of Outputs：7
- Voltage - Supply (Min)：5.5V
- Voltage - Supply (Max)：22V
- Voltage - Output：40V
- Current - Output / Channel：60mA
- Frequency：625kHz ~ 1.25MHz
- Dimming：PWM
- 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：-
LED Driver IC datasheet and documents for LP8543SQE
LED Driver IC Overview
The LP8543SQE is a Texas Instruments LED lighting driver IC designed for medium-sized LCD backlight applications. It features a boost topology with seven independent output channels, each capable of delivering up to 60 mA. The device operates within an input voltage range of 5.5 V to 22 V and supports a switching frequency between 625 kHz and 1.25 MHz. It provides a maximum output voltage of 40 V and includes internal switches. The component is housed in a 24-WQFN package and functions as a DC-DC regulator with PWM dimming control.
LED Driver IC Feature Summary
- SMBus/I2C controlled interface for digital regulation
- Seven-channel current mode output capability
- Integrated PWM dimming functionality
- Boost converter topology with internal power switches
LED Driver IC Applications
- Medium-sized LCD backlight systems
- White LED (WLED) driver circuits
- Portable electronic display illumination
LED Driver IC Procurement Notes
Verify the specific suffix 'SQE' against official Texas Instruments documentation to confirm pinout and electrical characteristics, as variations exist within the LP8543 family. Ensure compatibility with I2C/SMBus host controllers. Confirm RoHS compliance status through the manufacturer's latest datasheet revision notes before integration into production designs.
LED Driver IC Selection Notes
Select this component when designing for medium-sized displays requiring multi-channel white LED driving. It is suitable for systems needing precise current matching and digital control via I2C. Consider the 24-WQFN package constraints and thermal requirements. Verify that the input supply voltage remains within the 5.5 V to 22 V operational window for stable boost regulation.
LED Driver IC Part Context
This part belongs to the LP8543 series of LED drivers from Texas Instruments. It is specifically engineered for WLED applications in portable devices. The SQE variant denotes a specific tape-and-reel packaging configuration and manufacturing lot code. It serves as a specialized solution for high-efficiency backlighting where space and channel count are critical design factors.
LED Driver IC Replacement Considerations
LP8543SQ/NOPB is a documented direct substitute within the same series. Both parts share identical electrical specifications and pinouts. Verify that the replacement part meets the specific packaging and quality level requirements of the original design.
LED Driver IC FAQ
What is the maximum output voltage of the LP8543SQE?
The device supports a maximum output voltage of 40 V.
Does the LP8543SQE include internal power switches?
Yes, the LP8543SQE integrates internal power switches for the boost converter topology.
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