Design Win Education

32 channels LED driver with Automotive CAN FD Light interface

Download datasheet Order Direct

Product overview


The L99LDLH32 is a monolithic 32-channel linear current regulator specifically designed for automotive exterior O/LED rear lighting applications. Thanks to the high side configuration of the output channels, the L99LDLH32 is suitable to drive OLED panel with common cathode. It guarantees up to 35 V output driving capability - to cover the OLED forward voltage wide spread - and features 32 regulated current sources able to provide from 1 mA up to 15 mA individually programmable current to drive each pixel of the OLED panel independently. As the other device in the family (L99LDLL16), the L99LDLH32 integrates a robust purely automotive CAN FD Light compatible communication interface which allows a high rate data transmission (up to 1 Mbit/s) and uses CAN FD structure for long frames. Besides the CAN FD Light compatible physical layer, the device also integrates the protocol handler, so no additional external devices are needed to facilitate communication with Commander ECU. The L99LDLH32 can operate in bus mode using CAN FD Light compatible interface or in stand-alone/fail-safe mode using internal Few Time Programmable (FTP) memory registers.

  • All features

    • AEC-Q100 qualified
    • General
      • CAN FD Light compatible Serial Interface, Protocol Handler, Draft Specification Proposal (DSP) available from CAN in Automation (CiA)
      • High precision oscillator integrated, no external quartz required
      • QFN48L 7x7 with exposed pad
      • Timeout watchdog with Limp Home
      • Low standby current
      • Stand Alone/Fail Safe and Bus mode operation
      • Direct drive (1 Direct Input), for 1 function group supporting ASIL requirements
      • Widest configurability by embedded non-volatile and volatile memories
      • Operating supply voltage range5.5 V – 40 V
    • Linear Regulators section
      • Operating temperature range- 40°C – 150°C
      • 32 constant current output channels, high side configuration
      • Output current from 1 mA to 15 mA, parallelable outputs
      • Output voltage up to 35 V
      • Feedback voltage to external pre-regulator, to optimize the regulation voltage minimizing overall power dissipation
      • Current setting per channel by 8-bit DAC
      • Analogue dimming, 8-bit PWM channel individual exponential brightness control and 8-bit global PWM dimming
      • Programmable PWM frequency
      • Slow turn on/off time, gradual outputs delay and dithered clock, for better EMC performances
    • Protection and diagnostic
      • Integrated 8-bit ADC, for full and flexible diagnostic
      • 1 dedicated line for fault bus
      • Temperature warning (1 threshold)
      • Over-temperature shutdown
      • Short circuit and open load detection and protection
      • Automatic LED current derating, through external NTC measurement and device junction temperature (TJ)

You might also like...

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L99LDLH32

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.

Please select one model supplier :





3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
VFQFPN 48 7x7x1.0 mm Automotive Ecopack2



VFQFPN 48 7x7x1.0 mm

Material Declaration**:


Marketing Status



VFQFPN 48 7x7x1.0 mm



RoHS Compliance Grade


(**) 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

Swipe or click the button to explore more details Don't show this again
Part Number
Marketing Status
Budgetary Price (US$)*/Qty
Order from ST
Order from distributors
Packing Type
Country of Origin
Operating temperature (°C)
Available at distributors

Distributor availability of L99LDLH32TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

L99LDLH32TR Active

Budgetary Price (US$)*/Qty:
Packing Type:
Country of Origin:

Part Number:


Operating Temperature (°C)



Distributor Name

Distributor reported inventory date:

Swipe or click the button to explore more details Don't show this again

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