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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

STMicroelectronics L99CL01XPTR

Name: L99CL01XPTR
Brand: STMicroelectronics
SKU: L99CL01XPTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L99CL01XPTR

Manufacturer:: STMicroelectronics

Category:: LED Drivers

Package:: 36-PowerFSOP (0.295", 7.50mm Width)

Datasheet:: L99CL01XPTR.pdf

Description:: IC LED DRIVER LIN DIM POWERSSO36

Quantity:: RFQ Add To RFQ list

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Inventory:2,612

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Product details

Overview

L99CL01XPTR 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 R_DS(on) (0.5 Ω typical) and overcurrent thresholds, SPI daisy-chain interface, analog current sense multiplexing, and a synchronous PWM module with phase-shift control - enabling precise, low-EMI LED dimming in 12 V/24 V battery environments.

For engineers reviewing the L99CL01XPTR datasheet, L99CL01XPTR pinout, L99CL01XPTR application, or L99CL01XPTR equivalent, this page delivers verified technical context on fail-safe operation, split-supply channel grouping (VSA–VSD), ultra-low-power standby (<5 µA), limp-home direct-drive capability, and real-world diagnosis features including per-channel digital fault reporting and analog current sensing.

Technical Context

The L99CL01XPTR implements a split-supply architecture with four independent switch supply groups (VSA/VSB/VSC/VSD), each powering two outputs, allowing flexible fuse assignment and localized overvoltage/undervoltage protection with latched status reporting (UVF_X/OVF_X). Its integrated synchronous PWM engine supports programmable phase shift, pulse skipping, and direct-drive pins for limp-home mode - all coordinated via a 4 MHz SPI interface with daisy-chain capability.

Each of the eight high-side outputs delivers up to 1 A continuous current with edge shaping during fault shutdown, thermal foldback, and short-circuit recovery strategies differentiated between normal and fail modes. Diagnosis includes per-channel digital status registers (overcurrent, overtemperature, UV/OV) and an analog current sense output (CS) with SPI-selectable channel routing and 1:1000 or 1:2000 scaling based on programmed R_DS(on).

Key Specifications

Parameter	Value and Actual Design Meaning
Output count	8 independent high-side switches with individual enable and fault reporting
R_DS(on) (typ)	0.5 Ω per channel - enables efficient 1 A LED drive with <1 W dissipation at full load
Supply range (VS)	6 V to 24 V - supports 12 V and 24 V automotive battery systems with reverse-battery protection to −24 V
SPI clock max	4 MHz - ensures fast configuration and real-time status polling in time-critical lighting control loops
Standby current	<5 µA at 25°C - meets automotive off-state leakage requirements for extended battery life
Operating junction temp	−40°C to +150°C - qualified for under-hood and cabin-mounted lighting modules
Package thermal resistance	R_thj-amb = 35°C/W (1 cm² copper, one channel ON) - enables compact PCB layout with defined thermal derating

Pinout & Package

Delivered in PowerSSO-36 package - thermally enhanced exposed-pad SO package with GND-connected heat slug, optimized for automotive PCBs requiring high power density and robust thermal management.

Pin/Terminal	Circuit Role	Design Meaning
OUT1–OUT8	High-side power outputs	Individually protected p-MOSFET drains; support parallel operation and edge-shaped shutdown during faults
VSA–VSD	Grouped switch supply inputs	Four isolated supply rails (VSA for OUT1/2, VSB for OUT3/4, etc.) enabling independent fuse assignment and fault isolation
CS	Analog current sense output	Current-proportional signal (I_OUT/1000 or /2000) with SPI-selectable channel routing for diagnostics
ENABLE, LIMP, IN1–IN7	Digital control inputs	Active-high logic inputs with internal pull-down; ENABLE activates device, LIMP forces fail mode, INx enables direct-drive in limp-home
CSN, SCK, SDI, SDO	SPI interface terminals	4-wire SPI with chip select, 4 MHz clock, and daisy-chain capability for multi-device configurations
PWMCLK / WAKE	Multi-function pin	Accepts external PWM clock in active mode; outputs wake signal when ENABLE = low - supports system-level sleep/wake coordination

Key Features

Feature	Design Value
Programmable R_DS(on)	Configurable per channel (0.5 Ω or 0.6 Ω typical) to optimize trade-off between conduction loss and thermal margin
Synchronous PWM with phase shift	Reduces peak input current and conducted EMI by staggering switching edges across output groups
Limp-home direct drive	6 dedicated INx pins allow hardware-level override of OUT1–OUT3 and OUT5–OUT7 during fail mode - no MCU required
Dual-mode fault handling	Latched shutdown for thermal/UV/OV faults in normal mode; auto-restart for overcurrent/UV/OV in fail mode - improves system resilience
Split-supply group monitoring	Independent UVF_X/OVF_X status bits per VSA–VSD rail - enables precise root-cause diagnosis in multi-fuse architectures

Applications

Automotive Front Fog Lamps

Automotive Rear Combination Lamps

Use Scenario: Driving in low-visibility conditions requiring adaptive fog lamp intensity and fault-tolerant operation.

IC Role / Device Role / Timing Role: High-side driver controlling 8-channel LED arrays with synchronized PWM dimming and real-time current monitoring per channel.

Use Value: Phase-shifted PWM reduces EMI interference with nearby radar/sensor systems; limp-home mode maintains basic illumination if MCU fails.

Use Scenario: Integrated brake, turn, and tail lighting with dynamic brightness control and regulatory compliance for thermal safety.

IC Role / Device Role / Timing Role: Fault-aware LED driver providing per-output overtemperature warning and latch-off, plus analog CS feedback for closed-loop current regulation.

Use Value: Programmable R_DS(on) and thermal derating curves enable consistent luminance across temperature; UVF/OVF detection prevents false triggers during load-dump transients.

Automotive Interior Ambient Lighting

Automotive License Plate Illumination

Use Scenario: Multi-zone cabin lighting with smooth dimming transitions and zero-failure tolerance in premium vehicle cabins.

IC Role / Device Role / Timing Role: SPI-configured LED controller supporting daisy-chained topology for centralized MCU control of multiple L99CL01XPTR devices.

Use Value: Ultra-low standby current (<5 µA) extends battery life during vehicle sleep; edge-shaped fault shutdown avoids voltage spikes damaging sensitive RGB LEDs.

Use Scenario: Compact, cost-sensitive rear lighting module requiring minimal external components and robust transient immunity.

IC Role / Device Role / Timing Role: Single-chip solution replacing discrete FETs and protection ICs - integrates high-side switching, diagnostics, and PWM generation.

Use Value: Built-in reverse-battery protection (−24 V) and load-dump immunity eliminate need for external TVS diodes; PowerSSO-36 footprint simplifies thermal layout.

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
TPS92692QPWPRQ1	8-channel buck-boost LED driver with integrated MOSFETs; requires external inductor; no split-supply grouping	Better suited for constant-current LED strings with wide input range (4.5–40 V); lacks limp-home direct-drive pins	Select when driving long LED strings needing regulated current, not high-side switching into 12 V rail
MAX16832ATP+	Quad high-side driver (not octal); supports up to 60 V VS; no SPI interface - uses analog/PWM inputs only	Targeted at simpler, lower-channel-count designs where digital diagnostics and daisy-chaining are unnecessary	Choose for cost-sensitive 4-channel applications without need for per-output digital fault registers or current sense multiplexing

Compared with TPS92692QPWPRQ1 and MAX16832ATP+, the L99CL01XPTR uniquely combines octal high-side switching, split-supply group independence, SPI-based diagnostics, and hardware limp-home - making it optimal for complex, safety-critical automotive lighting nodes requiring both flexibility and fail-operational behavior.

Availability

L99CL01XPTR is available at Aetrix Electronics and suitable for automotive front fog lamps, rear combination lamps, interior ambient lighting, and license plate illumination requiring stable component supply across production lifecycles.

Supply support for L99CL01XPTR 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 headquartered in Geneva, Switzerland, specializing in automotive-grade analog, power, and microcontroller solutions with AEC-Q100 qualification expertise.

The L99CL01XPTR belongs to ST's automotive LED driver product line, engineered specifically for functional-safety-compliant exterior and interior lighting systems demanding high integration, diagnostic coverage, and robustness against automotive transients.

FAQ

What is the maximum continuous current per channel?

Each output (OUT1–OUT8) supports up to 1 A continuous current at T_j ≤ 125°C. Total device current is thermally limited by PCB copper area and ambient conditions - with R_thj-amb = 35°C/W (1 cm² copper, one channel ON). Derating curves in Section 4.2 of the datasheet define safe operating area based on simultaneous channel loading and board layout.

How does the limp-home function operate without MCU intervention?

When the LIMP pin is driven high, the device enters fail mode and routes control of OUT1–OUT3 and OUT5–OUT7 directly to IN1–IN3 and IN5–IN7 pins - bypassing SPI configuration. These inputs have internal pull-down resistors and accept standard 3.3 V/5 V logic levels, enabling hardwired fail-safe illumination using discrete switches or simple controllers.

Can multiple L99CL01XPTR devices be daisy-chained via SPI?

Yes - the SDO pin of one device connects to the SDI pin of the next, with shared CSN, SCK, and PWMCLK lines. The daisy-chain supports read/write of CDR and SDR registers across up to 16 devices using a single SPI master, reducing MCU GPIO count and simplifying firmware for multi-lamp systems.

What protection features are latched versus auto-recovering?

In normal mode, overtemperature, UVF, and OVF events cause latched shutdown until status registers are cleared via SPI. In fail mode, overcurrent, UVF, and OVF trigger auto-restart after filter timeout, while overtemperature remains latched - ensuring continued operation during transient faults but preventing thermal runaway.

L99CL01XPTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 36-PowerFSOP (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

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

L99CL01XPTR FAQ

1.How can I place an order for L99CL01XPTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L99CL01XPTR 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 L99CL01XPTR reliable?

The price and inventory of L99CL01XPTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L99CL01XPTR is usually 5 days.

3.What payment methods are accepted for L99CL01XPTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L99CL01XPTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L99CL01XPTR?

L99CL01XPTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L99CL01XPTR 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 L99CL01XPTR?

For technical support, including L99CL01XPTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L99CL01XPTR requirements.

6.How does Aetrix verify that L99CL01XPTR is sourced from the original manufacturer or authorized distributors?

All L99CL01XPTR 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 L99CL01XPTR meets industry standards.

7.What is the process for return or replacement of L99CL01XPTR?

All L99CL01XPTR units undergo pre-shipment inspection (PSI). If there is an issue with L99CL01XPTR, 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 L99CL01XPTR part is unused and in its original packaging.

Return procedure for L99CL01XPTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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