Listing Template
Need Customer Care? 01733806223 support@chipbay.uk
5x Texas Instruments LP8550TLX-E00 LP8550 backlight LED
ITEM DESCRIPTION

High-Efficiency LED Backlight Driver for Notebooks

The LP8550 is a white-LED driver with integrated boost converter. It has six adjustable current sinks which can be controlled by PWM input or with I2C-compatible serial interface. The boost converter has adaptive output voltage control based on the LED driver voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions.

LED outputs have 8-bit current resolution and up to 13-bit PWM resolution with additional 1- to 3-bit dithering to achieve smooth and precise brightness control. Proprietary Phase Shift PWM control is used for LED outputs to reduce peak current from the boost converter, thus making the boost capacitors smaller. The Phase Shifting scheme also eliminates audible noise.

Automatic PWM dimming at lower brightness values and current dimming at higher brightness values can be used to improve the optical efficiency. Internal EEPROM is used for storing the configuration data. This makes it possible to have minimum external component count and make the solution very small.

The LP8550 has safety features which make it possible to detect LED outputs with open or short fault — low input voltage and boost overcurrent conditions are monitored, and chip is turned off in case of these events. Thermal de-rating function prevents overheating of the device by reducing backlight brightness when set temperature has been reached.

    • High-Voltage DC/DC Boost Converter with Integrated FET
      with Four Switching Frequency Options: 156/312/625/1250 kHz
    • 2.7-V to 22-V Input Voltage Range to Support 1x to 5x Cell Li-Ion
      Batteries
    • Programmable PWM Resolution
      • 8 to 13 True Bits (Steady State)
      • Additional 1 to 3 Bits Using Dithering During Brightness
        Changes
    • I2C and PWM Brightness Control
    • Automatic PWM & Current Dimming for Improved Efficiency
    • PWM output frequency and LED Current set through Resistors
    • Optional Synchronization to Display VSYNC Signal
    • Six LED Outputs with LED Fault (Short/Open) Detection
    • Low Input Voltage, Overtemperature, Overcurrent Detection,
      and Shutdown
    • Minimum Number of External Components

All orders placed before 3pm will be dispatched within same working day.
98% of deliveries are delivered during estimated time, however sometimes delivery may take longer.
For more details and delivery deadline please see our delivery policy page. Shipping Page

We accept returns on all new and used items in their original packaging within 30 days of purchase.
There is no need to open an eBay case, simply contact us and we will arrange the return of the item. When returning an item back to us please provide the following information to help us process your return as quickly as possible.

  • Your eBay Username
  • Date when purchased
  • Reason for return
For more details please see our returns page. Returns Page

ChipBay is a UK-based PCB components, genuine computer parts and accessories retailer established in 2010. With long years of experience we have contacts in the industry with complementary skills enabling us to further increase our resources on regular basis. We care about our trademark that is why the producs that we sell are the highest quality which can be sourced from around the world.

Best way to contact us is to send us a message via eBay messaging service or to our email.
With message please include item name or ID number about which product You are inquiring for.

We will reply to You as soon as possible.  Thank You.

Email: support@chipbay.uk
Phone Number: 01733806223
Address:
ChipBay LTD
Northey House
Oxney Road
Peterborough PE1 5YW
United Kingdom