L99LD20

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High power LED driver for automotive applications

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  • 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

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Related Applications

Body and Convenience

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS11366
      High power LED driver for automotive applications
      3.0
      1.13 MB
      PDF
      DS11366

      High power LED driver for automotive applications

    • Description Version Size Action
      AN5420
      L99LD20 and L99LD21 Application Design Guidelines
      1.0
      482.24 KB
      PDF
      AN5420

      L99LD20 and L99LD21 Application Design Guidelines

Publications and Collaterals

    • Description Version Size Action
      Smart power solutions for car body applications 4.0
      3.38 MB
      PDF

      Smart power solutions for car body applications

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L99LD20Q6
Active
VFQFPN 6X6 Automotive Ecopack2
L99LD20Q6TR
Active
VFQFPN 6X6 Automotive Ecopack2

L99LD20Q6

Package:

VFQFPN 6X6

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 6X6

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L99LD20Q6TR

Package:

VFQFPN 6X6

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 6X6

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
Package
Packing Type
Temperature (°C) ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
min
max
L99LD20Q6TR Available at 3 distributors

Distributor availability ofL99LD20Q6TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
MOUSER WORLDWIDE 985 1 Order Now
Farnell Element14 EUROPE 200 1 Order Now

Distributor reported inventory date: 2020-07-10

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

985

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

200

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-10

Buy now
Active
VFQFPN 6X6 Tape And Reel - - EAR99 THAILAND 1.753 / 1k
L99LD20Q6 No availability of distributors reported, please contact our sales office
Active
VFQFPN 6X6 Tray - - EAR99 THAILAND 1.753 / 1k

L99LD20Q6TR

Marketing Status

Active

Unit Price (US$)

1.753

Budgetary Price (US$)*/Qty

1.753 / 1k

Distributor availability ofL99LD20Q6TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
MOUSER WORLDWIDE 985 1 Order Now
Farnell Element14 EUROPE 200 1 Order Now

Distributor reported inventory date: 2020-07-10

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

985

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

200

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-10

Package

VFQFPN 6X6

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-

(max)

-

ECCN (US)

EAR99

Country of Origin

THAILAND

L99LD20Q6

Marketing Status

Active

Unit Price (US$)

1.753

Budgetary Price (US$)*/Qty

1.753 / 1k

Package

VFQFPN 6X6

Packing Type

Tray

Operating Temperature (°C)

(min)

-

(max)

-

ECCN (US)

EAR99

Country of Origin

THAILAND

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors