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NXP Semiconductors ASL2417SHNY
- Part No.:
- ASL2417SHNY
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ASL2417SHNY.pdf
- Description:
- IC LED DRVR LIN PWM 1.5A 32HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,081
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Product details
Overview
ASL2417SHNY from NXP Semiconductors is an AEC-Q100 Grade 1 qualified two-channel buck-mode LED driver IC for automotive exterior and interior lighting. It delivers constant average DC current up to 1.5 A per channel across input voltages from 10 V to 80 V, supports up to 20 LEDs per string, and integrates SPI-controlled limp-home mode for fail-operational safety in headlight systems.
For engineers reviewing the ASL2417SHNY datasheet, ASL2417SHNY pinout, ASL2417SHNY application, or ASL2417SHNY equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade diagnostics (VIN_stat, Tj_err, I-CH1/2), and real-world design meaning for LED current accuracy (±5 %), hysteresis programming, and dual-channel PWM dimming control.
Technical Context
The ASL2417SHNY implements a hysteretic buck topology with independently programmable current regulation per channel via SPI, supporting dynamic hysteresis adjustment (4 settings) to balance switching frequency (100 kHz–2 MHz) and LED current ripple. Each channel drives an external high-side N-channel MOSFET using an internally regulated, adjustable gate supply (VGG, programmable 5.58 V–10.20 V).
It features dual independent PWM inputs (PWM1/PWM2), integrated bootstrap diodes, output voltage monitoring (V_LEDx_on/off), and diagnostic registers reporting VIN_stat, Tj_err, SPI_err, and per-channel current-reach status (I-CH1/I-CH2). Limp-home mode is customer-programmable and activates on SPI communication failure without MCU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Hysteretic buck converter - enables stable current regulation without external compensation components |
| Input Voltage Range | 10 V to 80 V - supports wide automotive battery transients including cold-crank and load-dump conditions |
| Output Current Accuracy | ±5 % over −40 °C to +125 °C - ensures consistent LED brightness across full automotive ambient range |
| Max Output Voltage | 70 V - enables driving up to 20 white LEDs (3.5 V each) in series per channel |
| Switching Frequency Range | 100 kHz to 2 MHz - configurable via hysteresis setting to optimize EMI and efficiency trade-offs |
| Diagnostic Coverage | VIN_stat, Tj_err, VGG_err, I-CH1/I-CH2, SPI_err - enables real-time fault detection and safe state transition in ASIL-B systems |
| Limp-Home Mode | Customer-programmable via SPI - maintains defined LED output behavior during MCU communication loss, critical for DRL and position light compliance |
Pinout & Package
Housed in HVQFN32 (SOT617-12), 5 mm × 5 mm × 0.85 mm, with exposed thermal pad soldered to PCB ground for enhanced thermal performance in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1, 32) | Chip ground reference | Primary return path for power and signal; exposed pad must be connected to PCB ground for thermal and EMI integrity |
| VIN (31) | Main input supply | Accepts 10–80 V automotive input; feeds internal regulators and gate drivers | VCC (3) | External 5 V supply | Provides regulated 5 V for SPI interface and logic; decoupling required near pin |
| EN (4) | Enable control | Active-high digital enable; device enters Off mode when low, disabling all outputs and SPI |
| CSB/SCLK/SDI/SDO (5–7, 2) | SPI interface | Full-duplex 4-wire SPI (3.3 V tolerant); supports configuration, readback, and diagnostics at up to 10 MHz |
| PWM1/PWM2 (9–10) | Channel dimming control | Direct TTL/CMOS-compatible PWM inputs; high = channel active, low = forced off; phase-shiftable for input current balancing |
| RH1/RL1/RH2/RL2 (24, 23, 18, 17) | Current sense terminals | High- and low-side sense resistor connections per channel; sets LED current via ILED = VSENSE / Rsense |
| G1/G2 (26, 20) | Gate drivers | High-side N-MOSFET gate drive outputs; driven by internal VGG-regulated supply |
| LX1/LX2 (25, 21) | Switch node | Connection to external inductor; carries high di/dt switching current; requires tight layout and ground stitching |
| BS1/BS2 (27, 19) | Bootstrap supplies | Charge pump nodes for high-side gate drive; require ceramic capacitors (≥100 nF) between BSx and LXx |
| VGG (29) | Gate driver supply | Internally regulated output (5.58–10.20 V); programmable via register 0x01h; monitored for overload (VGG_err) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C ambient operation - meets automotive reliability and lifetime requirements for exterior lighting |
| Dual independent PWM dimming | Enables asymmetric brightness control and phase-shifted switching - reduces input current ripple and EMI peaks |
| Programmable hysteresis (4 levels) | Adjusts switching frequency and current ripple trade-off - allows optimization for thermal, efficiency, and EMI targets per application |
| Integrated bootstrap diodes | Eliminates need for external bootstrap diodes - reduces BOM count and improves layout compactness in space-constrained modules |
| Per-channel current reach status (I-CH1/I-CH2) | Real-time feedback that target current was achieved - enables closed-loop brightness calibration and fault detection in open/short scenarios |
| Low quiescent current (< 5 µA) | Minimizes battery drain in standby - critical for always-on lighting functions like DRLs and parking lights |
Applications
| Daytime Running Lights (DRL) | Low Beam Headlights |
|---|---|
Use Scenario: Continuous 100 % duty-cycle illumination during vehicle operation, requiring stable luminous flux and thermal management. IC Role / Device Role / Timing Role: Dual-channel constant-current source delivering precise, temperature-compensated current to parallel LED strings. Use Value: ±5 % current accuracy ensures consistent photometric output across temperature; limp-home mode maintains minimum legal DRL intensity if MCU fails. | Use Scenario: Primary forward illumination with adaptive beam shaping, requiring robust fault handling and thermal derating. IC Role / Device Role / Timing Role: High-voltage buck controller driving up to 20-LED strings per channel with real-time junction temperature monitoring. Use Value: 70 V max output supports long LED strings; Tj_err bit triggers thermal foldback before 175 °C shutdown, preserving light output during transient overheating. |
| Turn Indicator Lighting | Cornering Lights |
Use Scenario: High-frequency flashing (1–2 Hz) with rapid on/off transitions and strict EMI limits in proximity to RF receivers. IC Role / Device Role / Timing Role: Fast-response current driver with PWM-controlled dimming and low-EME hysteresis tuning. Use Value: Programmable hysteresis minimizes switching noise; dedicated PWM1/PWM2 pins allow synchronized flash timing without MCU timing jitter. | Use Scenario: Dynamic lateral illumination activated during steering, requiring seamless fade-in/fade-out and independent channel control. IC Role / Device Role / Timing Role: Dual-channel current regulator with real-time hysteresis and current register updates during operation. Use Value: Hysteresis and LED current registers can be updated mid-operation - enables smooth analog-like dimming down to 30 mA without flicker or step artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar two-channel automotive LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NCV78763 | Two-channel linear+boost architecture; no buck topology; lower max input voltage (28 V); no limp-home mode | Better suited for low-voltage interior lighting; not rated for 80 V transients or high-power DRLs | Select when input voltage stays below 28 V and system-level limp-home is handled externally |
| Infineon TLD5541-1 | Single-channel buck driver; supports up to 60 V input; includes integrated MOSFET; no SPI interface or limp-home | Targeted at cost-sensitive single-string applications; lacks dual-channel coordination and diagnostics | Select for simpler, lower-BOM-cost designs where dual-channel control and ASIL-B diagnostics are not required |
Compared with NCV78763 and TLD5541-1, the ASL2417SHNY uniquely combines 80 V input tolerance, dual-channel SPI-programmable buck regulation, and customer-configurable limp-home - making it the only option qualified for high-power, fail-operational automotive exterior lighting with stringent EMI and thermal constraints.
Availability
ASL2417SHNY is available at Aetrix Electronics and suitable for daytime running lights, low-beam headlights, and turn indicator systems requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for ASL2417SHNY 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
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in functional safety and automotive-grade analog power management.
The ASL2417SHNY belongs to NXP's ASL family of automotive LED drivers, designed specifically for ASIL-B compliant exterior lighting systems requiring high-voltage resilience, diagnostic richness, and fail-operational behavior in harsh environments.
FAQ
What is the maximum LED string voltage supported by the ASL2417SHNY?
The ASL2417SHNY supports an output voltage of up to 70 V per channel, enabling configurations with up to 20 white LEDs (3.5 V typical forward voltage) in series. This rating is validated across the full −40 °C to +125 °C ambient range and accounts for worst-case LED Vf drift and input transients. The actual usable string voltage depends on VIN, selected hysteresis, and inductor value - but 70 V represents the absolute maximum regulated output capability of the ASL2417SHNY.
How does the limp-home mode function in the ASL2417SHNY?
The ASL2417SHNY limp-home mode is a customer-programmable safety feature that activates automatically when SPI communication with the host microcontroller fails. Once triggered, the ASL2417SHNY executes preconfigured current, dimming, and channel-enable settings stored in its MTP memory - maintaining defined LED output without MCU intervention. This behavior is critical for meeting regulatory requirements in DRL and position light applications where continuous illumination must be guaranteed even during system faults.
Can the ASL2417SHNY drive both channels simultaneously at full 1.5 A output?
Yes, the ASL2417SHNY is specified to deliver up to 1.5 A per channel continuously, and both channels can operate simultaneously at full rated current. Thermal performance depends on PCB layout, heatsinking, and ambient conditions - the device includes junction temperature monitoring (Tj_err bit) and thermal shutdown at +175 °C. For sustained dual-channel 1.5 A operation, the exposed thermal pad must be soldered to a minimum 200 mm² copper pour connected to GND, and input voltage should remain within 12–48 V to limit power dissipation in the gate drivers and sense resistors.
What is the purpose of the RH1/RL1 and RH2/RL2 pins on the ASL2417SHNY?
The RH1/RL1 and RH2/RL2 pins on the ASL2417SHNY provide high-side and low-side current sense connections for each channel, enabling flexible placement of the external sense resistor. RHx connects to the high side (between VIN and FET source), RLx to the low side (between FET source and GND). This dual-point sensing allows accurate current measurement regardless of FET configuration and supports Kelvin sensing for improved accuracy. The ASL2417SHNY calculates LED current as ILED = VSENSE / Rsense, where VSENSE is the differential voltage across RHx–RLx, programmable via SPI registers 0x02h/0x03h.
Does the ASL2417SHNY support diagnostic readback of LED open/short conditions?
Yes, the ASL2417SHNY provides direct diagnostic readback for LED open and short conditions through its output voltage measurement registers (V_LED1_on, V_LED1_off, V_LED2_on, V_LED2_off at addresses 0x20h–0x23h). By comparing measured on-state and off-state voltages against expected thresholds - e.g., near-zero V_LEDx_off indicates a short, while V_LEDx_on exceeding 70 V or dropping below 2.5 V suggests an open - the host MCU can detect faults without additional circuitry. These values are updated automatically on each PWM transition and are accessible via SPI, forming the basis for ASIL-B-compliant LED health monitoring in the ASL2417SHNY.
ASL2417SHNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Buck
- Internal Switch(s):
- Yes
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 10V
- Voltage - Supply (Max):
- 80V
- Voltage - Output:
- 2.5V ~ 70V
- Current - Output / Channel:
- 1.5A
- Frequency:
- 100kHz ~ 2MHz
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-HVQFN (5x5)
ASL2417SHNY FAQ
1.How can I place an order for ASL2417SHNY through Aetrix?
Please submit a Request for Quotation (RFQ) for ASL2417SHNY 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 ASL2417SHNY reliable?
The price and inventory of ASL2417SHNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASL2417SHNY is usually 5 days.
3.What payment methods are accepted for ASL2417SHNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASL2417SHNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASL2417SHNY?
ASL2417SHNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASL2417SHNY 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 ASL2417SHNY?
For technical support, including ASL2417SHNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASL2417SHNY requirements.
6.How does Aetrix verify that ASL2417SHNY is sourced from the original manufacturer or authorized distributors?
All ASL2417SHNY 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 ASL2417SHNY meets industry standards.
7.What is the process for return or replacement of ASL2417SHNY?
All ASL2417SHNY units undergo pre-shipment inspection (PSI). If there is an issue with ASL2417SHNY, 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 ASL2417SHNY part is unused and in its original packaging.
Return procedure for ASL2417SHNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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