L99LD20Q6

L99LD20Q6

L99LD20Q6TR Active

High power LED driver for automotive applications
Supply Voltage Min Volt5.5
Supply Voltage Max Volt24.0
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2
GradeAutomotive
Package NameVFQFPN 6X6
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

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.

In stock:
$3.34
Range Unit Price Savings
1 - 9$3.340%
10 - 99$2.8315%
100 - 249$2.3330%
250 - 499$2.0938%
500$2.0240%
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