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L99LD20Q6TR

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High power LED driver for automotive applications

Quantity $ per Unit Savings
1 - 9$4.290%
10 - 24$3.8610%
25 - 99$3.6515%
100 - 249$3.1626%
250 - 300$3.0030%
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Out of stock
$4.29
Parameter NameParameter Value
Supply Voltage Min Volt5.5
Supply Voltage Max Volt24.0
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
RoHs compliantEcopack2
GradeAutomotive
Package NameVFQFPN 6X6

The L99LD20 is a flexible LED driver, which is specifically designed for the control of two independent high brightness LED strings for automotive front lighting applications. It consists of a high efficiency monolithic dual buck converter.


The buck converters integrate n-channel MOSFET which is driven by a bootstrap circuit.


When more than two LED channels are required on one module, then more devices L99LD20 can be combined; also with L99LD21 device - incorporating Boost Controller - from which L99LD20 derivate.

Key features
  • AEC-Q100 qualified
  • General
    • ST SPI communication v4.1
    • 5.5 to 24 V Operating battery voltage range
    • Load dump protected
    • QFN40L 6x6 (wettable flanks) with exposed pad
    • Timeout watchdog and limp home function
    • Low standby current
  • Buck section
    • Integrated switching mosfets
    • Lossless current sensing without need of external components
    • Very accurate LED current setting programming inductor's peak current and peak-to-peak current ripple
    • Adjustable peak current by SPI
    • Adjustable current ripple by SPI
    • Integrated PWM generation unit with 10-bit resolution and phase shift
    • Peak current control
    • Constant VLED x TOFF architecture
  • Protection and diagnostic
    • Battery under voltage
    • Temperature warning (2 thresholds)
    • Overtemperature shutdown
    • LED voltage digital feedback through SPI
    • Buck outputs short circuit and open load protection