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STMicroelectronics L99PD08TR
- Part No.:
- L99PD08TR
- Manufacturer:
- STMicroelectronics
- Package:
- 32-LQFP
- Datasheet:
-
L99PD08TR.pdf
- Description:
- IC PWR DRIVER N-CHAN 1:8 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,122
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Product details
Overview
L99PD08TR from STMicroelectronics is an 8-channel SPI-controlled high-side driver interface IC for VIPower™ M0-5/M0-5E automotive HSDs, featuring independent PWM control (256× prescaled base clock), programmable diagnostic thresholds (analog current sense), overtemperature latch-off, and limp-home safety mode. It operates at 3.3 V or 5.0 V supply and targets exterior/interior automotive lighting systems requiring fault-tolerant channel-level diagnostics and phase-shifted inrush management.
For engineers reviewing the L99PD08TR datasheet, L99PD08TR pinout, L99PD08TR application, or L99PD08TR equivalent, this device supports analog/digital VIPower status readback via 8 ST/CS inputs, multiplexed MUX_ST/CS feedback, synchronous diagnostics per channel, and ST-SPI protocol with CSN timeout - critical for automotive lighting ECU design, fail-safe power sequencing, and PWM-driven LED load control.
Technical Context
The L99PD08TR integrates a dual-clock PWM generator (CLK_IN0/CLK_IN1 selectable per channel) with 256× frequency division and programmable phase shift (PHASE_CH0–CH7 registers), enabling precise inrush current shaping across 8 independent open-drain OUT0–OUT7 outputs. Each output drives VIPower HSD inputs with configurable ON/OFF or PWM modes via dedicated SPI registers (PWM_EN, CLK_SEL, DUTY_CHx).
It implements real-time channel diagnostics using 8 ST/CS inputs-supporting both digital (pull-up + series 4.7 kΩ) and analog (100 Ω reverse-battery protection) HSD types-with programmable overcurrent thresholds (OLOVL_TH_1/2), thermal latch-off, and filtered fault reporting via FAULTN and AUX_STATUS registers. The MUX_ST/CS and SYNC pins provide time-multiplexed status/current feedback synchronized to selected channel index.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 3.3 V or 5.0 V (dual-rail: VDDIO accepts 5 V; VCORE3 regulated to 3.3 V) |
| Output channels | 8 independent open-drain outputs (OUT0–OUT7) for VIPower HSD control |
| PWM resolution | 256× prescaling of external CLK_IN0/CLK_IN1 (or internal ~122 Hz fallback) |
| Diagnostic inputs | 8 ST/CS pins (ST0/CS0–ST7/CS7), configurable per channel for analog/digital HSD feedback |
| SPI interface | ST-SPI protocol (SCK, SDI, SDO, CSN), 16-bit frames, CSN timeout, register-based control |
| Fault signaling | Active-low open-drain FAULTN pin with latch-off on overtemperature or HSD failure |
| Safety features | Limp-home mode (LHOMEN pin), synchronous diagnostics, fail-safe reset behavior |
Pinout & Package
L99PD08TR is housed in a 32-pin LQFP package (7 × 7 mm, 0.8 mm pitch) with exposed thermal pad, RoHS-compliant ECOPACK® construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0–OUT7 | HSD control outputs | True open-drain drivers for VIPower M0-5/M0-5E inputs; require external pull-up or LHOMEN connection |
| ST0/CS0–ST7/CS7 | Channel status/current sense inputs | Per-channel analog/digital feedback path; mapped 1:1 to corresponding OUTx; requires external protection resistors |
| MUX_ST/CS | Multiplexed status/current output | Time-shared analog/digital feedback (3 mA sink @ 2.7 V); enabled via MUX_EN/MUX_A–C bits in Control Register (hex00) |
| SYNC | Channel-synchronized output indicator | Reflects logic state of selected OUTx (per MUX_A–C); actively pulled low when multiplexer disabled |
| SCK, SDI, SDO, CSN | ST-SPI interface | 16-bit serial interface with positive-edge capture (SDI), negative-edge output (SDO), and CSN timeout |
| CLK_IN0 / CLK_IN1 | PWM base clock inputs | External clock sources for PWM generation; each channel selects one via CLK_SEL register (hex04) |
| LHOMEN | Limp-home enable | Pull-down control for fail-safe operation; weakly low if VDDIO unpowered; enables hardware-defined safe state |
| FAULTN | Global fault indicator | Open-drain active-low signal asserting on HSD fault, communication error, or thermal shutdown |
| EN | Enable input | High-active enable with internal pull-down; controls entry/exit from low-power mode |
| VDDIO / VCORE3 | Power supplies | VDDIO = 5 V input (internal LDO); VCORE3 = regulated 3.3 V core supply (shorted to VDDIO in 3.3 V mode) |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel independent PWM control | Each channel programmable for duty cycle (DUTY_CH0–CH7) and phase shift (PHASE_CH0–CH7), reducing inrush current peaks in multi-LED arrays |
| Configurable analog/digital diagnostics | DEV_TYPE register (hex02) selects HSD type per channel; OLOVL_TH_1/2 registers set current sense thresholds for analog VIPower |
| Synchronous multiplexed feedback | MUX_ST/CS and SYNC pins deliver time-aligned status/current data for selected channel without MCU polling overhead |
| Fail-safe limp-home mode | LHOMEN pin enables hardware-defined safe-state activation during power loss or fault, eliminating software dependency for critical lighting functions |
| Thermal reliability enhancement | Programmable overtemperature latch-off prevents repeated short-circuit stress on connected VIPower HSDs, extending system lifetime |
Applications
| Front Fog Lamp Control | Rear Combination Lamp |
|---|---|
|
Use Scenario: Driving multiple high-current halogen/LED fog lamps with synchronized PWM dimming and thermal derating. IC Role / Device Role / Timing Role: Centralized HSD interface managing 8 independent lamp channels, providing real-time current monitoring and phase-shifted turn-on to limit battery surge. Use Value: Eliminates need for discrete current-sense amplifiers and PWM timers per channel; reduces MCU GPIO and ADC loading by 8× while enabling ASIL-B–compatible diagnostics. |
Use Scenario: Controlling brake, tail, turn, and reverse LEDs in rear lamp assembly with fault isolation and limp-home fallback. IC Role / Device Role / Timing Role: SPI-configurable driver with per-channel diagnostic flags (OT_FAULT, OL_FAULT, STK_FAULT) and automatic FAULTN assertion on open/short detection. Use Value: Enables single-point fault reporting and channel-specific recovery without MCU intervention; LHOMEN ensures tail lamps remain illuminated at reduced brightness during failure. |
| Interior Ambient Lighting | Daytime Running Light (DRL) Module |
|
Use Scenario: Smooth PWM dimming of RGB ambient strips with color-mixing synchronization and thermal margin tracking. IC Role / Device Role / Timing Role: High-resolution PWM generator (256× prescale) with programmable phase offset across channels to minimize EMI and power rail noise. Use Value: Achieves flicker-free dimming down to 0.1% duty cycle; MUX_ST/CS allows shared ADC input for current calibration across all 8 zones. |
Use Scenario: Managing high-brightness LED strings in DRL with overvoltage/overcurrent protection and CAN-linked status reporting. IC Role / Device Role / Timing Role: Fault-tolerant interface between microcontroller and VIPower HSDs, delivering filtered diagnostic data via SPI for ECU-level health monitoring. Use Value: Supports ISO 16750-2 pulse testing compliance via latch-off behavior on overtemperature; FAULTN signal triggers CAN error frame transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side driver interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE9201SE | 8-channel HSD interface with integrated 0.35 Ω drivers; no external HSD required; lower integration depth for diagnostics | Replaces VIPower HSD + interface IC stack; limited analog current sense resolution vs. L99PD08TR's programmable thresholds | Choose for space-constrained modules where driver integration outweighs diagnostic granularity needs |
| BD18337EFV-M | 6-channel automotive LED driver with built-in boost controller; fixed 12-bit PWM; no ST-SPI or multiplexed feedback | Targets standalone LED modules; lacks channel-by-channel status multiplexing and limp-home hardware support | Choose for cost-sensitive DRL designs needing integrated power conversion but not full VIPower ecosystem compatibility |
Compared with TLE9201SE and BD18337EFV-M, the L99PD08TR uniquely supports external VIPower M0-5/M0-5E drivers with full analog/digital status readback, hardware-enforced limp-home, and time-multiplexed diagnostics - making it optimal for scalable, modular automotive lighting ECUs requiring field-upgradable HSDs and ASIL-B diagnostic coverage.
Availability
L99PD08TR is available at Aetrix Electronics and suitable for front fog lamp control, rear combination lamp management, interior ambient lighting, and daytime running light (DRL) modules requiring stable component supply, automotive-grade lifecycle assurance, and AEC-Q100 qualified sourcing.
Supply support for L99PD08TR 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, industrial, and power management ICs with broad AEC-Q100 qualification coverage and functional safety expertise.
The L99PD08TR belongs to ST's VIPower™ interface product line, designed specifically to offload diagnostics, PWM timing, and safety-critical I/O management from automotive microcontrollers in lighting and body-control applications.
FAQ
What is the function of the MUX_ST/CS pin?
MUX_ST/CS delivers time-multiplexed status or current-sense feedback from the selected HSD channel (0–7), controlled by MUX_EN and MUX_A–C bits in the Control Register (hex00). It sinks up to 3 mA at 2.7 V and requires a 1.6–2.7 kΩ external pull-down resistor for optimal dynamic range, enabling single-ADC monitoring of all 8 channels without additional mux hardware.
How does limp-home mode operate on the L99PD08TR?
Limp-home mode activates when LHOMEN is pulled low-either by internal fault condition (RESET/FAIL SAVE) or external disconnection of VDDIO. In this state, the device configures OUTx outputs to drive connected VIPower HSDs at reduced current via internal pull-down paths, ensuring minimum illumination (e.g., tail lamps remain visible) without MCU involvement or software execution.
Can the L99PD08TR drive both analog and digital VIPower HSDs simultaneously?
Yes-the DEV_TYPE register (hex02) configures each channel individually for analog (current sense) or digital (status flag) HSD feedback. ST/CS pins accept either topology: analog channels require 100 Ω reverse-battery protection; digital channels require 4.7 kΩ series + pull-up resistors. This mixed-mode capability supports legacy and next-gen VIPower deployments in the same ECU.
What happens during a CSN timeout event?
A CSN timeout occurs when chip select remains low beyond the internal timer threshold (typically >100 µs), triggering automatic device reset into FAIL SAVE mode. All outputs go high-impedance, FAULTN asserts low, and the internal state machine halts SPI communication until CSN is deasserted and reasserted. This prevents bus lockup and ensures deterministic fault containment in noisy automotive environments.
L99PD08TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- VIPower™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 8
- Ratio - Input:Output:
- 1:8
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- SPI
- Voltage - Load:
- -
- Voltage - Supply (Vcc/Vdd):
- 3.15V ~ 5.25V
- Current - Output (Max):
- 10mA
- Rds On (Typ):
- -
- Input Type:
- -
- Features:
- Status Flag
- Fault Protection:
- Over Temperature
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LQFP (7x7)
L99PD08TR FAQ
1.How can I place an order for L99PD08TR through Aetrix?
Please submit a Request for Quotation (RFQ) for L99PD08TR 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 L99PD08TR reliable?
The price and inventory of L99PD08TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L99PD08TR is usually 5 days.
3.What payment methods are accepted for L99PD08TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L99PD08TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L99PD08TR?
L99PD08TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L99PD08TR 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 L99PD08TR?
For technical support, including L99PD08TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L99PD08TR requirements.
6.How does Aetrix verify that L99PD08TR is sourced from the original manufacturer or authorized distributors?
All L99PD08TR 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 L99PD08TR meets industry standards.
7.What is the process for return or replacement of L99PD08TR?
All L99PD08TR units undergo pre-shipment inspection (PSI). If there is an issue with L99PD08TR, 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 L99PD08TR part is unused and in its original packaging.
Return procedure for L99PD08TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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