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STMicroelectronics L99CL01XP
- Part No.:
- L99CL01XP
- Manufacturer:
- STMicroelectronics
- Category:
- LED Drivers
- Package:
- 36-PowerFSOP (0.295", 7.50mm Width)
- Datasheet:
-
L99CL01XP.pdf
- Description:
- IC LED DRIVER LIN DIM POWERSSO36
- Quantity:
- Payment:
- Shipping:
Inventory:2,008
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Product details
Overview
L99CL01XP from STMicroelectronics is an octal high-side LED driver IC designed for automotive interior and exterior lighting systems. It integrates eight fully protected p-channel MOSFET switches with individually programmable RDS(ON) (down to 600 mΩ) and overcurrent thresholds, SPI daisy-chain interface (up to 4 MHz), and integrated synchronous PWM module with phase-shift control. It operates across 6–24 V supply range and supports limp-home operation via six dedicated direct-drive pins.
For engineers reviewing the L99CL01XP datasheet, L99CL01XP pinout, L99CL01XP application, or L99CL01XP equivalent, this page delivers verified technical context, exact pin functions per PowerSSO-36 package, real-world automotive lighting use cases, and validated alternative drivers with documented functional trade-offs.
Technical Context
The L99CL01XP implements a split-supply architecture with four independent switch supply groups (VSA–VSD), enabling flexible fuse assignment and fault isolation across LED strings. Each of the eight outputs features edge-shaped switching, thermal shutdown with warning flag, and latch-off behavior on overtemperature or undervoltage events at its assigned supply rail.
Its dual-mode control architecture supports both SPI-programmed normal operation (with programmable PWM phase shift, pulse skipping, and multiplexed analog current sense) and hardware-triggered fail mode activated by the LIMP pin - where six outputs (OUT1–OUT3, OUT5–OUT7) are directly driven by INx pins while OUT4/OUT8 remain off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output count | 8-channel high-side switch with individual protection and diagnosis |
| RDS(ON) programmability | Configurable per channel: 600 mΩ or 1 Ω (affects current sense ratio and power loss) |
| Supply voltage range | VS = 6–24 V; VDD = 4.5–5.5 V - enables direct battery connection without external regulators |
| SPI interface speed | Up to 4 MHz - supports fast configuration and status polling in real-time lighting control |
| Quiescent current | < 5 µA in ultra-low-power mode - meets automotive static current requirements |
| Output current capability | Up to 1 A per channel (derated by PCB thermal design and total power dissipation) |
| Fail mode activation | LIMP pin with 10 ms digital filter - ensures robust noise immunity during vehicle ECU reset sequences |
Pinout & Package
Package: PowerSSO-36 (exposed thermal pad, RoHS-compliant ECOPACK®). Pin layout optimized for thermal performance and automotive EMC compliance, with grouped supply rails (VSA–VSD) and segregated logic/analog domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,18 | GND | Common ground for logic, analog, and power return - internally connected to exposed thermal slug |
| 2 | REXT | External resistor sets internal current-sense precision - required for accurate IOUT/1000 or IOUT/2000 scaling |
| 3 | VDD | 5 V logic supply - powers SPI interface and digital core; monitored for UV lockout |
| 4 | CS | Analog current sense output - SPI-multiplexed to monitor any single channel's output current |
| 5 | ENABLE | Active-high enable - controls entry into active/standby modes; internal pull-down ensures safe default state |
| 6 | LIMP | Fail-mode trigger - activates hardware-controlled limp-home with direct drive on six outputs |
| 7–12 | IN1–IN3, IN5–IN7 | Direct-drive inputs - override SPI control during fail mode; internal pull-down prevents spurious activation |
| 13 | CSN | SPI chip select (active low) - internal pull-up enables bus sharing in daisy-chain configurations |
| 14 | SDO | SPI data output - synchronized to SCK rising edge; high-impedance when CSN = high |
| 15 | SDI | SPI data input - sampled on SCK falling edge; internal pull-down ensures defined idle state |
| 16 | SCK | SPI clock input - supports up to 4 MHz; internal pull-down avoids unintended clocking |
| 17 | PWMCLK/WAKE | Dual-function pin - PWM clock input when ENABLE = high; WAKE output (open-drain) when ENABLE = low |
| 19,22,23,26,29,32,33,36 | OUT1–OUT8 | High-side power outputs - p-channel MOSFETs with programmable RDS(ON), overcurrent, and thermal protection |
| 20,21 | VSD | Supply for OUT7/OUT8 - must be tied together on PCB; monitored for UV/OV faults |
| 24,25 | VSC | Supply for OUT5/OUT6 - grouped for fuse-level fault containment |
| 27,28 | VS | Main battery supply - reverse-battery protected down to –24 V; primary overvoltage/undervoltage reporting source |
| 30,31 | VSB | Supply for OUT3/OUT4 - isolated from other groups to limit fault propagation |
| 34,35 | VSA | Supply for OUT1/OUT2 - enables independent current limiting and diagnostics per string |
Key Features
| Feature | Design Value |
|---|---|
| Programmable per-channel RDS(ON) | 600 mΩ or 1 Ω selection - balances conduction loss vs. current-sense accuracy for each LED string |
| SPI daisy-chain capability | Supports multi-device cascading with single MCU interface - reduces wiring and MCU pin count in multi-zone lighting |
| Integrated PWM phase-shift control | Reduces peak input current and conducted EMI by staggering channel switching - critical for CISPR 25 Class 5 compliance |
| Individual analog current sense multiplexing | Single CS pin monitors any one of eight outputs - eliminates need for eight separate sense resistors and ADC channels |
| Limp-home direct-drive pins | Six dedicated INx pins activate fail-safe lighting without MCU intervention - meets ISO 26262 ASIL-B diagnostic coverage requirements |
| Ultra-low standby current (<5 µA) | Enables always-on vehicle architectures without battery drain - compliant with ISO 19453-3 quiescent current limits |
Applications
| Automotive Front Headlamp Module | Automotive Rear Combination Lamp |
|---|---|
|
Use Scenario: Dynamic adaptive front-lighting system (AFS) with matrix LED arrays requiring independent channel dimming and fault containment. IC Role / Device Role / Timing Role: High-side driver controlling eight LED segments; provides per-string overcurrent shutdown, thermal warning, and SPI-configurable PWM dimming with phase shift. Use Value: Enables ASIL-B compliant lamp operation with no single-point failure affecting all beams - VSA–VSD grouping isolates faults to individual optical zones. |
Use Scenario: Integrated rear lamp with brake, turn, tail, and reverse functions using shared LED arrays and strict thermal management. IC Role / Device Role / Timing Role: Centralized LED driver managing eight output channels; uses analog CS multiplexing to verify current in each function during startup and diagnostics. Use Value: Reduces BOM cost by eliminating discrete current-sense amplifiers while maintaining <±5% current accuracy per channel via REXT calibration. |
| Automotive Interior Ambient Lighting | Automotive License Plate Illumination |
|
Use Scenario: Multi-color ambient lighting with RGBW LED strips requiring smooth dimming, color mixing, and low-noise operation. IC Role / Device Role / Timing Role: High-side controller delivering synchronized PWM across channels with programmable phase shift to minimize audible coil whine and input ripple. Use Value: Achieves flicker-free dimming down to 0.1% duty cycle using fast-settling current sense and edge-shaped switching transitions. |
Use Scenario: Compact license plate lamp meeting ECE R87 photometric requirements with minimal PCB area and thermal mass. IC Role / Device Role / Timing Role: Dual-output driver (OUT1/OUT2 on VSA) powering parallel LEDs; leverages paralleled outputs to halve RDS(ON) loss and reduce junction temperature. Use Value: Enables 100% brightness operation at 85°C ambient without derating - validated via PowerSSO-36 thermal data (Rthj-amb = 28°C/W @ 400 mm² copper). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal high-side LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16832ATL+T | 8-channel, but only 300 mA per channel; no split supply; analog-only interface (no SPI) | Lacks daisy-chain, diagnostics, and limp-home - suitable only for non-safety-critical interior lighting | Select when cost sensitivity outweighs diagnostic depth and ASIL compliance needs |
| TLD2010-16ES | Single-channel high-side driver; requires 8× devices for same channel count; integrated LIN transceiver | Designed for distributed architecture with LIN bus control - increases PCB area and component count | Select when system demands node-level LIN communication over centralized SPI control |
Compared with MAX16832ATL+T and TLD2010-16ES, the L99CL01XP uniquely combines eight-channel integration, split-supply fault containment, SPI daisy-chaining, and hardware limp-home - making it the only option qualified for ASIL-B exterior lighting modules requiring single-package functional safety support.
Availability
L99CL01XP is available at Aetrix Electronics and suitable for automotive interior lighting, automotive exterior lighting, and ASIL-B compliant lamp control systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.
Supply support for L99CL01XP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader specializing in automotive, industrial, and power management ICs, with vertical manufacturing and AEC-Q100 qualified product lines.
The L99CL01XP belongs to ST's automotive LED driver portfolio, engineered specifically for cost-effective, high-reliability exterior and interior lighting systems demanding functional safety, EMC robustness, and thermal resilience.
FAQ
What is the maximum continuous output current per channel?
The L99CL01XP supports up to 1 A per channel under defined thermal conditions (e.g., 400 mm² PCB copper, 25°C ambient). Actual current is limited by total power dissipation - with 600 mΩ RDS(ON), max continuous current drops to ~750 mA at 85°C ambient due to thermal derating per PowerSSO-36 Rthj-amb = 28°C/W.
How does the device handle overtemperature events?
Each output includes independent thermal monitoring. On overtemperature detection, the affected channel latches off with edge-shaped turn-off to minimize power dissipation during short-circuit conditions. A thermal warning flag is set before shutdown, allowing MCU-initiated derating. In fail mode, auto-restart occurs after cooldown; in normal mode, manual status register clear is required.
Can OUT1 and OUT2 be paralleled for higher current?
Yes - OUT1 and OUT2 share VSA and can be paralleled to double current capacity and halve conduction loss. The datasheet confirms this configuration is supported, provided PCB layout maintains matched trace lengths and thermal coupling. No additional external components are needed beyond common output routing.
Is the L99CL01XP qualified for automotive use?
Yes - the L99CL01XP is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), features reverse-battery protection down to –24 V, and meets ISO 7637-2 pulse 5a/b for load dump immunity. Its fail-mode architecture and diagnostic registers support ISO 26262 ASIL-B development workflows.
L99CL01XP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 36-PowerFSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 24V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- SPI
- Applications:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerSSO-36
L99CL01XP FAQ
1.How can I place an order for L99CL01XP through Aetrix?
Please submit a Request for Quotation (RFQ) for L99CL01XP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for L99CL01XP reliable?
The price and inventory of L99CL01XP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L99CL01XP is usually 5 days.
3.What payment methods are accepted for L99CL01XP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L99CL01XP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L99CL01XP?
L99CL01XP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L99CL01XP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for L99CL01XP?
For technical support, including L99CL01XP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L99CL01XP requirements.
6.How does Aetrix verify that L99CL01XP is sourced from the original manufacturer or authorized distributors?
All L99CL01XP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L99CL01XP meets industry standards.
7.What is the process for return or replacement of L99CL01XP?
All L99CL01XP units undergo pre-shipment inspection (PSI). If there is an issue with L99CL01XP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The L99CL01XP part is unused and in its original packaging.
Return procedure for L99CL01XP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
L99CL01XP Tags
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BCR430UXTSA2
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BCR420UE6433HTMA1
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CL2N8-G
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