LP8543 - Uncategorized TEXAS INSTRUMENTS - Free user manual and instructions
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| Brand | Texas Instruments |
| Model | LP8543 |
| Product Type | LED Backlight Driver IC |
| Number of Channels | 16 |
| Input Voltage Range | 2.7 V to 5.5 V |
| Output Current per Channel | Up to 30 mA |
| Dimming Method | PWM with I2C control |
| Communication Interface | I2C |
| Package Type | 32-pin QFN (5 mm × 5 mm) |
| Operating Temperature | -40°C to 85°C |
| Typical Application | LCD backlighting for tablets, monitors, automotive displays |
| Weight | 0.1 g (approx.) |
| Dimensions (Package) | 5 mm × 5 mm × 0.9 mm |
| Power Supply | 2.7 V to 5.5 V DC |
| Main Functions | Backlight LED driving, linear current regulation, PWM dimming, fault detection |
| Maintenance and Cleaning | Not applicable (IC); handle with ESD precautions |
| Safety | Compliant with RoHS; avoid exceeding absolute maximum ratings |
| Spare Parts and Repairability | Not user-serviceable; replace IC if faulty |
| General Information | Designed for high-efficiency backlighting with advanced dimming control |
Frequently Asked Questions - LP8543 TEXAS INSTRUMENTS
What is the typical input voltage range for the LP8543?
The LP8543 operates with an input voltage range of 2.7 V to 5.5 V, making it suitable for battery-powered devices.
How many LED channels does the LP8543 support?
The LP8543 supports 16 independent LED channels, each with programmable current up to 30 mA.
Can the LP8543 be used for automotive displays?
Yes, the LP8543 is designed for automotive and industrial applications, with an operating temperature range of -40°C to 85°C.
What communication interface does the LP8543 use?
The LP8543 uses I2C interface for configuration and dimming control, allowing easy integration with microcontrollers.
How do I set the LED current for each channel?
LED current is set via I2C registers. Each channel has a 6-bit DAC to adjust current from 0 to 30 mA in steps of approximately 0.47 mA.
Does the LP8543 support PWM dimming?
Yes, the LP8543 supports PWM dimming via an external signal or internal PWM generator with up to 256 steps.
What protective features does the LP8543 have?
The LP8543 includes overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.
Can multiple LP8543s be cascaded for more channels?
Yes, multiple LP8543 ICs can be connected via I2C using different slave addresses, enabling expansion to more than 16 channels.
What is the typical package and size of the LP8543?
The LP8543 comes in a 32-pin QFN package measuring 5 mm × 5 mm, with a height of 0.9 mm.
Where can I find the datasheet and application notes?
The datasheet and application notes are available on the Texas Instruments website under the product page for LP8543.
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USER MANUAL LP8543 TEXAS INSTRUMENTS
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Product information
Brand : TEXAS INSTRUMENTS
Model : LP8543
Category : Uncategorized