L99LD21Q6 STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
STMicroelectronics L99LD21Q6 is an automotive-grade high-power LED driver IC in a QFN-40 package. It supports serial data input for 8-channel LED control with AEC-Q100 qualification. Available from authorized distributors with worldwide shipping for automotive lighting designs.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 41
- Lifecycle
- OBSOLETE
- Datasheet
- L99LD21Q6 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-channel serial-input LED driver qualified to AEC-Q100 for automotive lighting reliability
- QFN-40 (S-XQCC-N40) compact package enables space-efficient PCB layouts in automotive modules
- True output polarity with serial interface reduces microcontroller GPIO usage in multi-LED systems
Applications
The L99LD21Q6 is designed for automotive exterior and interior lighting applications including daytime running lights (DRL), rear combination lamps, and ambient lighting modules. Its serial interface allows a single microcontroller to control 8 LED channels simultaneously, making it suitable for ADAS indicator arrays and dashboard lighting in vehicles operating over the -40°C to +125°C automotive temperature range.
Specifications
| YTEOL | 0 |
| Data Input Mode | SERIAL |
| Input Characteristics | STANDARD |
| Interface IC Type | LED DISPLAY DRIVER |
| JESD-30 Code | S-XQCC-N40 |
| JESD-609 Code | e3 |
| Multiplexed Display Capability | NO |
| Number of Functions | 1 |
| Number of Segments | 8 |
| Output Polarity | TRUE |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | LCC40,.24SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG |
| Peak Reflow Temperature (Cel) | 260 |
| Screening Level | AEC-Q100 |
| Supply Current-Max | 30mA |
| Supply Voltage-Max | 24V |
| Supply Voltage-Min | 5.5V |
| Supply Voltage-Nom | 13V |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| fmax-Min | 0.4096MHz |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for L99LD21Q6:
Frequently Asked Questions
How many LED channels does the L99LD21Q6 control and what interface does it use?
The L99LD21Q6 controls 8 LED channels via a serial data input interface, allowing one device to drive multiple LEDs with only a few microcontroller pins across a -40°C to +125°C operating temperature range.
Which automotive lighting systems are best matched to the L99LD21Q6's 8-segment capability?
The L99LD21Q6 is well-matched to automotive daytime running lights (DRL), rear combination lamp clusters, and matrix lighting systems where 8 independently controlled LED segments cover turn signal, brake, and position light functions in a single AEC-Q100 qualified IC.
What package does L99LD21Q6 use and how does it affect thermal management on automotive PCBs?
L99LD21Q6 uses the QFN-40 package (JESD-30 code S-XQCC-N40) with an exposed thermal pad, which provides a thermal resistance θJA of approximately 30°C/W, enabling efficient heat dissipation in high-power automotive LED driver applications.
Is L99LD21Q6 compliant with automotive quality and environmental standards?
Yes, L99LD21Q6 carries a JESD-609 code of e3, confirming RoHS-compliant lead-free solder finish, and is designed to meet AEC-Q100 Grade 1 automotive reliability requirements for operation down to -40°C.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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