My Inquiry
My Account
NXP Semiconductors ASL3417SHNY
- Part No.:
- ASL3417SHNY
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ASL3417SHNY.pdf
- Description:
- IC LED DRVR LIN PWM 1.5A 32HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,191
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ASL3417SHNY from NXP Semiconductors is an AEC-Q100 Grade 1 qualified three-channel automotive LED buck driver IC with programmable limp-home mode, hysteretic control architecture, 10 V to 80 V input range, up to 1.5 A per channel output current, and SPI-based diagnostics and configuration - deployed in exterior lighting systems including daytime running lights and adaptive front lighting.
For engineers reviewing the ASL3417SHNY datasheet, ASL3417SHNY pinout, ASL3417SHNY application, or ASL3417SHNY equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade operating parameters (−40 °C to +125 °C), and real-world diagnostic capabilities including VIN monitoring, junction temperature readback, and open/short-circuit detection per channel.
Technical Context
The ASL3417SHNY implements a hysteretic buck topology with independent current regulation per channel using external high-side N-channel MOSFETs, where each channel's gate driver (G1–G3) is powered by an internally regulated, SPI-programmable VGG supply (5.58 V to 10.20 V). It supports dynamic hysteresis adjustment via SPI to maintain switching frequency between 100 kHz and 2 MHz while minimizing LED current ripple.
Each channel features dedicated PWM inputs (PWM1–PWM3), dual-sense resistor terminals (RHx/RLx), bootstrap supply pins (BSx), and inductor connections (LXx), enabling independent dimming, fault detection, and flexible layout. Diagnostics include per-channel LED voltage measurement (V_LEDx_on/off), current-reached status, thermal shutdown at +175 °C, and fail-silent mode recovery via Clr_error bit in the function control register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 10 V to 80 V - enables direct battery-supplied operation across 12 V and 24 V automotive platforms without pre-regulation. |
| Output Current Accuracy | ±5 % over −40 °C to +125 °C - ensures stable LED brightness under full automotive ambient conditions without recalibration. |
| Max Output Voltage per Channel | 70 V - supports up to 20 LEDs in series per string (e.g., white LEDs at ~3.5 V each). |
| Operating Temperature Range | −40 °C to +125 °C ambient - meets AEC-Q100 Grade 1 requirements for under-hood and exterior lighting placement. |
| Switching Frequency Range | 100 kHz to 2 MHz - adjustable via SPI-programmed hysteresis to balance EMI, efficiency, and component size. |
| Quiescent Current | < 5 µA at 25 °C with EN = 0 - minimizes battery drain during vehicle sleep mode. |
| Diagnostic Interface | SPI (CSB/SCLK/SDI/SDO) with 24-bit register map - enables real-time readback of VIN, VGG, junction temperature, LED voltages, and error flags. |
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 environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1, 32) | Chip ground reference | Primary return path for analog/digital circuits; exposed pad must be connected to PCB ground plane for thermal and EMI integrity. |
| VIN (31) | Main power input | Accepts 10–80 V unregulated automotive supply; feeds internal regulators and gate drivers. |
| EN (4) | Enable control input | Active-high logic signal that powers up/down all channels and digital blocks; must be asserted before SPI configuration. |
| CSB/SCLK/SDI/SDO (5–7, 2) | SPI interface signals | Full-duplex serial interface for programming current, hysteresis, VGG, and reading diagnostics - requires pull-up on CSB for robust noise immunity. |
| PWM1–PWM3 (8–10) | Independent channel dimming inputs | Logic-level inputs controlling on/off state per channel; support phase-shifted PWM for reduced input current ripple. |
| RH1–RH3 / RL1–RL3 (12–13, 17–18, 23–24) | Current sense resistor terminals | High-side and low-side connections for external sense resistors - enable accurate current regulation and overcurrent protection per channel. |
| G1–G3 (15, 20, 26) | High-side gate drivers | Drive external N-channel MOSFETs; output voltage set by SPI-controlled VGG regulator (5.58–10.20 V). |
| LX1–LX3 (16, 21, 25) | Switch node connections | Connect to inductor and cathode of LED string; switching waveform directly impacts EMI and efficiency. |
| BS1–BS3 (14, 19, 27) | Bootstrap supply inputs | Provide floating supply for high-side gate drive; require external ceramic capacitors (typically 100 nF) between BSx and LXx. |
| VGG (29) | Gate driver supply monitor | Output of internal linear regulator; voltage level programmable via register 0x01h and monitored for undervoltage faults (BS_UV). |
Key Features
| Feature | Design Value |
|---|---|
| Customer-programmable limp-home mode | Configurable fallback behavior (e.g., fixed current, reduced brightness, or channel disable) when SPI communication fails - critical for functional safety compliance in lighting systems. |
| Per-channel PWM dimming with phase shift | Three independent PWM inputs allow synchronized or staggered switching to minimize input capacitor RMS current and reduce conducted EMI. |
| Integrated bootstrap diode | Eliminates need for external bootstrap diodes - reduces BOM count and improves reliability in high-vibration automotive environments. |
| LED open/short circuit detection | Real-time monitoring of V_LEDx_on/off registers via SPI enables automatic fault classification without additional external circuitry. |
| Thermal shutdown with SPI-readback junction temperature | Junction temperature reported in register 0x26h (−40 °C to +175 °C); Tj_err flag triggers fail-silent mode at +175 °C - supports ISO 26262 ASIL-B system monitoring. |
Applications
| Daytime Running Lights (DRL) | Adaptive Front Lighting System (AFS) |
|---|---|
|
Use Scenario: Continuous low-power illumination during daylight hours, requiring precise brightness control and fail-safe operation. IC Role / Device Role / Timing Role: Three-channel constant-current driver regulating independent LED strings for left/right DRL modules with limp-home fallback on communication loss. Use Value: ±5 % current accuracy ensures consistent luminance across temperature; SPI diagnostics enable OEM-level fault logging and predictive maintenance. |
Use Scenario: Dynamic beam shaping using multiple LED zones controlled in real time based on vehicle speed, steering angle, and ambient light. IC Role / Device Role / Timing Role: High-speed, independently dimmable channel controller enabling zone-specific PWM modulation and rapid current reconfiguration via SPI. Use Value: 100 kHz–2 MHz adjustable switching frequency allows optimization for both EMI compliance and optical response time; per-channel voltage monitoring detects LED degradation before visible failure. |
| Cornering Light Module | Front Position / Parking Light |
|
Use Scenario: Activated during low-speed turns to illuminate curb-side area, requiring fast on/off response and thermal resilience. IC Role / Device Role / Timing Role: Dual-channel driver powering asymmetric LED arrays (e.g., 2 strings on turn side, 1 on opposite), with PWM1/PWM2 enabling directional activation. Use Value: Independent hysteresis programming per channel balances efficiency and ripple for mixed-string configurations; thermal shutdown prevents overheating during extended activation. |
Use Scenario: Always-on or ignition-dependent low-intensity lighting meeting ECE R87 photometric requirements. IC Role / Device Role / Timing Role: Single-channel or multi-string constant-current source with limp-home mode ensuring minimum visibility (e.g., 10 % brightness) after microcontroller reset or CAN bus interruption. Use Value: AEC-Q100 Grade 1 qualification guarantees operation at −40 °C cold start; <5 µA quiescent current avoids battery drain during prolonged parking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-channel automotive LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20052ATP/V+ (Analog Devices) | Fixed-frequency current-mode buck controller; no integrated gate driver; requires external high-side driver; no limp-home mode. | Targeted at cost-sensitive non-safety-critical lighting; lacks SPI-based diagnostics and programmable fallback behavior. | Select when gate driver integration is unnecessary and limp-home is not required by system safety architecture. |
| TLD5098EL (Infineon) | Hysteretic buck with integrated gate driver; single-channel only; supports up to 2 A; no multi-channel synchronization or per-channel PWM inputs. | Used in simpler lighting modules (e.g., single-beam headlights); requires multiple ICs for three-string control, increasing PCB area and BOM cost. | Select when only one LED string is needed or when board space permits discrete channel replication. |
Compared with MAX20052ATP/V+ and TLD5098EL, the ASL3417SHNY uniquely integrates three independent hysteretic buck controllers with SPI-configurable limp-home, per-channel diagnostics, and phase-shifted PWM - delivering higher functional integration, lower system-level complexity, and direct compliance with ASIL-B lighting safety goals.
Availability
ASL3417SHNY is available at Aetrix Electronics and suitable for automotive exterior lighting, adaptive front lighting systems, and interior ambient lighting requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for ASL3417SHNY 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 leadership in automotive MCUs, radar, and power management ICs.
The ASL3417SHNY belongs to NXP's automotive LED driver product line, designed specifically to replace discrete buck solutions in safety-critical exterior lighting systems while supporting ISO 26262 functional safety development and AEC-Q100 Grade 1 reliability requirements.
FAQ
What is the maximum number of LEDs the ASL3417SHNY can drive per channel?
The ASL3417SHNY supports up to 20 LEDs per channel, enabled by its 70 V maximum output voltage capability and wide input range (10 V to 80 V). This allows series connection of typical white or amber automotive LEDs (3.0–3.8 V forward voltage) while maintaining sufficient headroom for regulation across temperature and aging. The actual count depends on LED VF tolerance and system thermal design.
Does the ASL3417SHNY support independent current programming for each of its three channels?
Yes, the ASL3417SHNY supports fully independent current programming per channel via SPI registers: LED current channel 1 (0x02h), channel 2 (0x03h), and channel 3 (0x04h), each with two selectable current ranges (via I_CH1–I_CH3 bits in register 0x05h). This enables asymmetric configurations - for example, 300 mA for DRL, 700 mA for low beam, and 1.2 A for high beam - all on a single IC.
How does the limp-home mode function in the ASL3417SHNY, and how is it configured?
The ASL3417SHNY's limp-home mode is customer-programmable via SPI and activates automatically upon SPI communication failure or microcontroller timeout. Configuration uses dedicated MTP registers to define fallback behavior per channel - such as fixed current level, reduced brightness, or forced-off state. This feature is essential for meeting UNECE R149 and ISO 26262 ASIL-B requirements in automotive lighting.
What thermal protection mechanisms does the ASL3417SHNY implement?
The ASL3417SHNY incorporates junction temperature monitoring (register 0x26h), thermal shutdown at +175 °C (Tj_err flag in diagnostic register 0x37h), and fail-silent mode entry on overtemperature. When shutdown occurs, all outputs disable while SPI remains active for fault readback. Recovery requires clearing the Clr_error bit (bit 6 in register 0x00h) - enabling safe restart without full power cycle.
Can the ASL3417SHNY drive standard-level MOSFETs, or is it limited to logic-level devices?
The ASL3417SHNY supports both logic-level and standard-level N-channel MOSFETs via its programmable VGG gate driver supply (5.58 V to 10.20 V, set in register 0x01h). This flexibility allows use of cost-effective standard FETs (e.g., IPB180N15N3 G) without external level-shifting, while maintaining fast switching and low conduction losses across automotive voltage transients.
ASL3417SHNY 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:
- 3
- 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)
ASL3417SHNY FAQ
1.How can I place an order for ASL3417SHNY through Aetrix?
Please submit a Request for Quotation (RFQ) for ASL3417SHNY 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 ASL3417SHNY reliable?
The price and inventory of ASL3417SHNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASL3417SHNY is usually 5 days.
3.What payment methods are accepted for ASL3417SHNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASL3417SHNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASL3417SHNY?
ASL3417SHNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASL3417SHNY 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 ASL3417SHNY?
For technical support, including ASL3417SHNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASL3417SHNY requirements.
6.How does Aetrix verify that ASL3417SHNY is sourced from the original manufacturer or authorized distributors?
All ASL3417SHNY 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 ASL3417SHNY meets industry standards.
7.What is the process for return or replacement of ASL3417SHNY?
All ASL3417SHNY units undergo pre-shipment inspection (PSI). If there is an issue with ASL3417SHNY, 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 ASL3417SHNY part is unused and in its original packaging.
Return procedure for ASL3417SHNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ASL3417SHNY Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
