L99LD21

Active

High power LED driver for automotive applications

Download datasheet Order Direct
Overview
Online design
Sample & Buy
Solutions
Documentation
CAD Resources
Tools & Software
Quality & Reliability
Get Started
Partner products
Sales Briefcase

Product overview

Description

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 high current gate driver for an external n-channel mosfet. It delivers a constant output voltage, up to 60 V, which supplies the inputs of the two integrated or external buck converters.
The boost controller of two devices can be stacked, in order to operate in dual phase for high power applications, with an interleaving pattern for an improved input current ripple.
The buck converters integrate n-channel mosfet which is driven by a bootstrap circuit.
  • All 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

You might also like...

Recommended for you

Related Applications

Automotive

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      AEK-LED-21DISM1

      Active

      Digitally controlled LED driver board for automotive lighting applications

      Automotive IC Eval Boards ST
      AEK-LED-21DISM1

      Description:

      Digitally controlled LED driver board for automotive lighting applications

      AEKD-AFL001

      Active

      AutoDevKit adaptive front lighting kit

      Automotive IC Eval Boards ST
      AEKD-AFL001

      Description:

      AutoDevKit adaptive front lighting kit
    • Part number
      Status
      Description
      Type
      Supplier

      AEKD-BLINDSPOTB1

      Active

      Set of assembled boards for blind-spot detection simulation

      Transportation Solution Eval Boards ST
      AEKD-BLINDSPOTB1

      Description:

      Set of assembled boards for blind-spot detection simulation

      L99LD21-ADIS

      Active

      Led Driver DISCOVERY

      Transportation Solution Eval Boards --
      L99LD21-ADIS

      Description:

      Led Driver DISCOVERY

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L99LD21

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Symbols

Symbols

Footprints

Footprints

3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L99LD21Q6
NRND
VFQFPN 6X6 Automotive Ecopack2
L99LD21Q6TR
Active
VFQFPN 6X6 Automotive Ecopack2

L99LD21Q6

Package:

VFQFPN 6X6

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

VFQFPN 6X6

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L99LD21Q6TR

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
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L99LD21Q6TR Available at 2 distributors

Distributor availability ofL99LD21Q6TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2960 1 Order Now
Farnell Element14 EUROPE 180 1 Order Now

Distributor reported inventory date: 2021-05-12

Distributor Name

MOUSER

Stock

2960

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

180

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-12

Buy Direct
Active
EAR99 NEC Tape And Reel VFQFPN 6X6 - - THAILAND 1.836 / 1k
L99LD21Q6 No availability of distributors reported, please contact our sales office
NRND
EAR99 NEC Tray VFQFPN 6X6 - - THAILAND 1.836 / 1k

L99LD21Q6TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.836 / 1k

Distributor availability ofL99LD21Q6TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2960 1 Order Now
Farnell Element14 EUROPE 180 1 Order Now

Distributor reported inventory date: 2021-05-12

Distributor Name

MOUSER

Stock

2960

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

180

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-12

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 6X6

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.836 / 1k

Country of Origin

THAILAND

L99LD21Q6

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.836 / 1k

ECCN (EU)

NEC

Packing Type

Tray

Package

VFQFPN 6X6

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.836 / 1k

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