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L99LD21Q6TR

High power LED driver for automotive applications

Operating RangeAutomotive
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
RoHs compliantEcopack2
GradeAutomotive
Package NameVFQFPN 6X6

The L99LD21 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 boost controller and a dual buck converter.The boost controller integrates a...
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Key features
  • AEC-Q100 qualified
  • General
    • ST SPI communication v4.1
    • 5.5 to 24V Operating battery voltage range
    • Load dump protected
    • QFN40L (wettable flanks) with exposed pad
    • Timeout watchdog and limp home function
    • Low standby current
  • Boost Section
    • Fixed frequency architecture, programmable by SPI
    • Peak current mode control
    • Dual phase operation supported
    • Input current limitation
    • Soft start
    • Overvoltage protection (OVP)
    • Short feedback failure protection
    • Constant voltage control
  • 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
In stock
Quantity $ per unit Savings
1-9$4.960%
10-24$4.4510%
25-99$4.2015%
100-249$3.6526%
250-499$3.4630%
500$3.1137%
Contact sales
$4.96
$4.96
Operating RangeAutomotive
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
RoHs compliantEcopack2
GradeAutomotive
Package NameVFQFPN 6X6

The L99LD21 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 boost controller and a dual buck converter.The boost controller integrates a...
Read More

Key features
  • AEC-Q100 qualified
  • General
    • ST SPI communication v4.1
    • 5.5 to 24V Operating battery voltage range
    • Load dump protected
    • QFN40L (wettable flanks) with exposed pad
    • Timeout watchdog and limp home function
    • Low standby current
  • Boost Section
    • Fixed frequency architecture, programmable by SPI
    • Peak current mode control
    • Dual phase operation supported
    • Input current limitation
    • Soft start
    • Overvoltage protection (OVP)
    • Short feedback failure protection
    • Constant voltage control
  • 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
Associated products