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  • L99LD01 is a precise constant current DC–DC converter LED driver for automotive applications, dedicated to the control of high-brightness LED headlights an housed in a LQFP32™ package.

    The device is designed to be used in Boost, Buck-Boost and Fly back converter topologies. An internal random dither oscillator works in low frequency modulation, allowing the RF spectrum of the switching frequency to spread so to reduce EMC emissions. The slope compensation ensures good converter loop stability whatever is the duty cycle needed by the application.
    The converter is able to work either in full power mode or in low frequency dimming mode.
    The device includes an internal low drop voltage regulator, that can be used to supply a microcontroller, and a reset pin, that is useful for resetting the microcontroller at the start up and every time that the regulated output voltage falls down below an established voltage threshold.

    Key Features

    • Automotive qualified
    • Constant current operation
    • Current LED settable by external sensing resistor and adjustable via SPI
    • Converter switching frequency adjustable by external resistor (RSF)
    • EMC reduction by internal spread spectrum dither oscillator
    • Low frequency PWM dimming operation.
    • Maximum input current limiter
    • Maximum switching duty cycle limiter
    • Slope compensation adjustable by external resistor (R9)
    • Battery overvoltage shut down protection (ext. R3, R4 resistors required)
    • Led chain OV detection (ext. R5, R6)
    • Multiplexed output for monitoring and control of LED temperature (external NTC resistor required), voltage of LED chain, and low frequency PWM
    • SPI communication serial interface transceiver (SDI, SDO, SCK, CSN)
    • Regulated output for micro supply 5 V ± 2 %-20 mA
    • Parameter programming and settings of internal memory registers by the dedicated SPI interface:
      • LED current reference adjusting (± 66.7 %)
      • Maximum input current limiter reference adjusting (± 55.5 %)
      • Random dither frequency sweeping, modulation frequency and deviation percentage
    • Power on reset pin output
    • ESD protection

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STMicroelectronics - L99LD01

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L99LD01
NRND
LQFP 32 7x7x1.4 Automotive Ecopack2
L99LD01TR-E
Active
LQFP 32 7x7x1.4 Automotive Ecopack2

L99LD01

Package:

LQFP 32 7x7x1.4

Material Declaration**:

PDF

Marketing Status

NRND

Package

LQFP 32 7x7x1.4

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L99LD01TR-E

Package:

LQFP 32 7x7x1.4

Material Declaration**:

PDF

Marketing Status

Active

Package

LQFP 32 7x7x1.4

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
L99LD01TR-E No availability of distributors reported, please contact our sales office Buy Direct
Active
EAR99 NEC Tape And Reel LQFP 32 7x7x1.4 - - MALAYSIA 1.6804 / 1k
L99LD01 No availability of distributors reported, please contact our sales office
NRND
EAR99 NEC Tray LQFP 32 7x7x1.4 - - MALAYSIA 1.6804 / 1k

L99LD01TR-E

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.6804 / 1k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

LQFP 32 7x7x1.4

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.6804 / 1k

Country of Origin

MALAYSIA

L99LD01

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.6804 / 1k

ECCN (EU)

NEC

Packing Type

Tray

Package

LQFP 32 7x7x1.4

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.6804 / 1k

Country of Origin

MALAYSIA

(*) 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