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NXP Semiconductors ASL4501SHNY
- Part No.:
- ASL4501SHNY
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ASL4501SHNY.pdf
- Description:
- IC LED DRIVER RGLTR 32HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,563
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Product details
Overview
ASL4501SHNY from NXP Semiconductors is an AEC-Q100 Grade 1 qualified four-phase DC-DC boost converter IC designed for automotive LED lighting systems. It delivers up to 80 V programmable output voltage across two independent outputs, operates from 5.5 V to 40 V input, and integrates SPI-controlled gate drivers for external N-channel MOSFETs with thermal shutdown at +175 °C junction temperature - enabling optimized supply for ASLx41xSHN multichannel LED buck drivers in headlight modules.
For engineers reviewing the ASL4501SHNY datasheet, ASL4501SHNY pinout, ASL4501SHNY application, or ASL4501SHNY equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade operating parameters (−40 °C to +125 °C ambient), real-world LED lighting use cases, and two rigorously cross-referenced alternative parts with documented functional differences.
Technical Context
The ASL4501SHNY implements fixed-frequency peak current mode control with parabolic slope compensation that tracks switching frequency and output voltage. Its dual-loop architecture supports independent configuration of two virtual outputs (Vout1/Vout2), each assignable to 1–4 physical phases via SPI registers (0Bh/0Ch for phase enable, 02h/0Fh/10h for mapping).
Phase timing is derived from a single internal oscillator with integer clock division (registers 09h/0Ah) and configurable phase delay/off-time (0Dh/0Eh). Loop stability is maintained through programmable proportional/integral gains (11h/12h) and slope compensation factors (13h), while coil current limiting uses per-phase sense resistors (14h) and thermal-compensated peak current thresholds (07h/08h).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5 V to 40 V - supports direct battery connection across cold-crank (6 V) to load-dump (60 V transient) conditions in 12 V automotive systems. |
| Max Output Voltage | 80 V - programmable via SPI register 03h/04h; enables driving high-Vf LED strings or powering ASLx41xSHN buck controllers requiring >60 V input. |
| Output Accuracy | ±3 % - guaranteed over temperature and line/load conditions; ensures stable LED current regulation in safety-critical lighting. |
| Operating Temperature | −40 °C to +125 °C ambient - meets AEC-Q100 Grade 1 requirements for under-hood automotive placement. |
| Junction Shutdown | +175 °C - thermal protection halts gate switching before silicon damage; recovery occurs automatically after cooldown. |
| Quiescent Current | <5 µA at 25 °C with EN = 0 - minimizes battery drain during vehicle sleep mode. |
| Package | HVQFN32 (5 mm × 5 mm × 0.85 mm) - thermally enhanced for high-power density in compact headlight ECU layouts. |
Pinout & Package
Housed in a 32-pin HVQFN package with exposed thermal pad (soldered to PCB ground), the ASL4501SHNY features four dedicated gate drivers (G1–G4), eight current-sense inputs (SNH1/SNL1 through SNH4/SNL4), dual feedback inputs (FB1/FB2), SPI interface (SDI/SCLK/CSB/SDO), enable (EN), battery supply (VBAT), gate driver supplies (VGG1/VGG2), and multiple GND pins for noise isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SNL1–SNL4 | Phase low-side current sense | Differential input for peak current detection per phase; enables cycle-by-cycle current limiting and soft-start control. |
| SNH1–SNH4 | Phase high-side current sense | Paired with SNLx to measure MOSFET source current; supports accurate per-phase power balancing. |
| G1–G4 | Gate driver outputs | Drives external N-channel MOSFET gates; supports logic-level (2.5 V) and standard-level (10 V) FETs via adjustable VGG1/VGG2. |
| FB1 / FB2 | Output voltage feedback | Resistive divider inputs for closed-loop regulation of Vout1/Vout2; referenced to internal 1.25 V bandgap. |
| SDI / SCLK / CSB / SDO | SPI serial interface | Full-duplex 4-wire interface for configuration, diagnostics (temperature, VBAT, VGG status), and real-time monitoring. |
| EN | Enable control | Active-high digital input; initiates power-on sequence and transitions device from Off → Configuration → Operation mode. |
| VBAT | Battery supply input | Primary power rail; monitored for undervoltage (5.5 V) and overvoltage (60 V transient) protection events. |
| VCC | External 5 V supply | Provides regulated power for internal logic and SPI interface; decoupling required per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent outputs | Configurable as one 4-phase output or two separate outputs (e.g., Vout1 for low-beam, Vout2 for high-beam), each with independent voltage, current limit, and loop compensation. |
| Programmable slope compensation | Five selectable resistor values (28–112 kΩ) per output via register 13h - maintains stability across wide frequency and duty-cycle ranges without external components. |
| Per-phase current limiting | Individual peak current thresholds set via registers 07h/08h - prevents magnetic saturation and enables soft-start by ramping phase activation. |
| Thermal and fault diagnostics | Junction temperature readback via SPI, VGG_OK status flag, and fail-silent mode on overtemperature/UV/OV faults - enables ASIL-B compliant system monitoring. |
| EMC-optimized switching | Configurable phase delay (1–32 clock cycles) and spread-spectrum-capable clock division - reduces peak EMI emissions for CISPR 25 Class 5 compliance. |
Applications
| Low Beam Lighting | High Beam Lighting |
|---|---|
Use Scenario: Constant-current supply for multi-string white LED arrays in adaptive front-lighting systems (AFS) with dynamic beam shaping. IC Role / Device Role / Timing Role: Four-phase boost controller generating stable 65 V output to feed ASL4110SHN buck drivers; synchronizes phase interleaving to minimize input ripple. Use Value: Enables precise dimming control and fast response to PWM commands while maintaining <±3 % output regulation across battery voltage swings. |
Use Scenario: High-lumen output for highway illumination using high-forward-voltage LED stacks requiring >70 V supply. IC Role / Device Role / Timing Role: Second independent output (Vout2) configured as 4-phase boost delivering 78 V at 3 A; phase delay tuned to 32 cycles for optimal EMI suppression. Use Value: Delivers 234 W output power with <15 mVpp input ripple, eliminating need for oversized bulk capacitors in space-constrained headlamp modules. |
| Daytime Running Lights (DRL) | Cornering Lights |
Use Scenario: Always-on, low-power LED array powered directly from vehicle battery with minimal heat generation. IC Role / Device Role / Timing Role: Single-phase operation on Vout1 (20 V output) with reduced switching frequency (200 kHz) and disabled unused phases to cut quiescent loss. Use Value: Achieves <5 µA shutdown current and 92 % efficiency at 100 mA load - extends battery life during parking mode. |
Use Scenario: Dynamic lateral illumination activated during steering maneuvers, requiring rapid voltage ramp-up and precise current matching. IC Role / Device Role / Timing Role: Dual-output mode with Vout1 (45 V) for main DRL and Vout2 (55 V) for cornering LEDs; independent loop compensation ensures identical transient response. Use Value: Sub-100 µs output voltage settling time enables seamless beam transition without visible flicker during steering angle changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar four-phase automotive boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4332-AEC1 | Single-output 4-phase boost (max 60 V); no dual-loop architecture or independent Vout2 programming. | Lacks separate high-beam/DRL output capability; requires external multiplexer for multi-voltage LED systems. | Select when only one regulated output is needed and cost sensitivity outweighs flexibility requirements. |
| LM5122MQ-Q1 | Two-output synchronous boost (max 65 V per channel); analog-based control with no SPI configurability or per-phase current limiting. | No digital diagnostics, no thermal readback, and fixed slope compensation - limits ASIL-B compliance path. | Select for simpler designs where SPI interface and advanced diagnostics are not required. |
Compared with MPQ4332-AEC1 and LM5122MQ-Q1, the ASL4501SHNY uniquely supports dual independent programmable outputs with full SPI configurability, per-phase current limiting, and integrated junction temperature monitoring - making it the only option qualified for AEC-Q100 Grade 1 dual-output LED headlight architectures requiring functional safety diagnostics.
Availability
ASL4501SHNY is available at Aetrix Electronics and suitable for automotive LED lighting, adaptive front-lighting systems (AFS), and electronic control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ASL4501SHNY 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 automotive-grade power management ICs.
The ASL4501SHNY belongs to NXP's ASL family of automotive LED driver support ICs, engineered specifically to provide flexible, high-efficiency boost conversion for next-generation adaptive headlight systems meeting ISO 26262 functional safety requirements.
FAQ
What is the maximum output voltage supported by the ASL4501SHNY?
The ASL4501SHNY supports a maximum programmable output voltage of 80 V via SPI registers 03h (Vout1) and 04h (Vout2). This is achieved using a thermal-compensated calculation: 0.3555 × register value × (1 + 333 ppm/°C × (Tj − 38°C)). The absolute hardware limit is 90 V, but 80 V is the recommended maximum for reliable operation with ASLx41xSHN buck drivers.
Does the ASL4501SHNY support dual independent outputs?
Yes, the ASL4501SHNY supports two fully independent outputs (Vout1 and Vout2), each configurable for 1–4 phases via SPI registers 0Bh/0Ch (phase enable) and 02h/0Fh/10h (phase mapping). Both outputs have separate feedback pins (FB1/FB2), independent voltage targets, current limits, loop compensation, and overvoltage protection thresholds.
How does the ASL4501SHNY handle thermal protection?
The ASL4501SHNY includes junction temperature monitoring accessible via SPI and triggers thermal shutdown at +175 °C. When exceeded, all gate drivers halt switching while SPI communication remains active in fail-silent mode. The device automatically resumes regulation once junction temperature falls below the hysteresis threshold, ensuring robust operation in high-ambient environments like headlamp housings.
Can the ASL4501SHNY drive both logic-level and standard-level MOSFETs?
Yes, the ASL4501SHNY integrates an adjustable gate driver supply (VGG1/VGG2) that can be configured via SPI to deliver 5 V to 10 V, supporting both logic-level (2.5 V–4.5 V VGS(th)) and standard-level (10 V VGS) N-channel MOSFETs. This eliminates external level-shifters and simplifies design for diverse LED driver topologies.
What package type is used for the ASL4501SHNY?
The ASL4501SHNY is housed in an HVQFN32 package (SOT617-12) measuring 5 mm × 5 mm × 0.85 mm with an exposed thermal pad. Per datasheet requirement, the pad must be soldered to PCB ground for optimal thermal performance and electrical noise immunity in automotive LED lighting applications.
ASL4501SHNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 5.5V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- 10V ~ 80V
- Current - Output / Channel:
- -
- Frequency:
- 130MHz ~ 250MHz
- Dimming:
- -
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-HVQFN (5x5)
ASL4501SHNY FAQ
1.How can I place an order for ASL4501SHNY through Aetrix?
Please submit a Request for Quotation (RFQ) for ASL4501SHNY 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 ASL4501SHNY reliable?
The price and inventory of ASL4501SHNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASL4501SHNY is usually 5 days.
3.What payment methods are accepted for ASL4501SHNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASL4501SHNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASL4501SHNY?
ASL4501SHNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASL4501SHNY 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 ASL4501SHNY?
For technical support, including ASL4501SHNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASL4501SHNY requirements.
6.How does Aetrix verify that ASL4501SHNY is sourced from the original manufacturer or authorized distributors?
All ASL4501SHNY 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 ASL4501SHNY meets industry standards.
7.What is the process for return or replacement of ASL4501SHNY?
All ASL4501SHNY units undergo pre-shipment inspection (PSI). If there is an issue with ASL4501SHNY, 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 ASL4501SHNY part is unused and in its original packaging.
Return procedure for ASL4501SHNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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