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Diodes Incorporated AL8862QSP-13
- Part No.:
- AL8862QSP-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AL8862QSP-13.pdf
- Description:
- IC LED DRIVER RGLTR PWM 1A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:149,561
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Product details
Overview
AL8862QSP-13 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive LED step-down DC/DC converter with integrated 55V N-channel MOSFET, 5–55V input range, up to 1A constant output current, and 1MHz switching frequency. It delivers precise LED current regulation via external RSET, supports analog/PWM dimming on a single CTRL pin, and provides fault reporting via open-drain FAULT pin for automotive interior and exterior lighting systems.
For engineers reviewing the AL8862QSP-13 datasheet, AL8862QSP-13 pinout, AL8862QSP-13 application, or AL8862QSP-13 equivalent, this page details its constant-current LED driver architecture, thermal shutdown (150°C), ±13% current-sense hysteresis, 4% typical output current accuracy, and dual SO-8EP/V-DFN3030-8/SWP package options - all critical for automotive PPAP-compliant designs.
Technical Context
The AL8862QSP-13 implements hysteresis-based current-mode control with internal 100mV nominal SET-pin threshold voltage and ±13% hysteresis, enabling stable constant-current regulation without external compensation. Its integrated 55V/0.4Ω NDMOS switch and high-side current sensing eliminate external sense resistor placement issues and reduce layout sensitivity.
Dimming is implemented through a multifunction CTRL pin supporting both analog voltage (0.4–2.5V) for 10–100% linear current scaling and PWM (0–0.3V low / >2.6V high) with <1µs transition time requirement. Fault detection includes open-circuit LED, current-sense resistor short, and overtemperature (150°C trip, 30°C hysteresis), reported via open-drain FAULT pin requiring external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 55V - supports full automotive battery range including cold-crank (5V) and load-dump (55V) transients. |
| Max Output Current | 1A - enables driving high-brightness LED strings (e.g., 3× white LEDs at 350mA each in parallel configuration). |
| Switching Frequency | Up to 1MHz - allows use of compact 47μH inductors and reduces EMI filter size in space-constrained headlamp modules. |
| Current Accuracy | ±4% typical - ensures uniform brightness across LED arrays without binning or calibration in production. |
| CTRL Pin Dimming | 0.4–2.5V analog or PWM (0.3V/2.6V thresholds) - enables direct interface with MCU GPIO or dedicated dimming controllers without level-shifting. |
| Fault Reporting | Open-drain FAULT pin - asserts low for LED open, RSET short, or TJ ≥150°C, simplifying system-level diagnostics with single pull-up resistor. |
| Thermal Resistance θJA | 58°C/W (SO-8EP) - defines minimum PCB copper area (2″×2″, 2oz) required to maintain TJ ≤150°C at 1A continuous load. |
Pinout & Package
AL8862QSP-13 is supplied in SO-8EP (exposed pad) package. The exposed pad (EP) must be soldered to a thermal land connected to GND for optimal thermal performance and EMI reduction.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SET) | Current sense reference input | Connects to external RSET between VIN and SET; sets nominal LED current via 100mV threshold (IOUT ≈ 0.1/RSET). |
| 2,7 (GND) | Power and signal ground | Common return path for IC bias, current sense, and FAULT output; must be low-impedance connection to thermal pad. |
| 3 (FAULT) | Open-drain fault indicator | Drives low during LED open, RSET short, or overtemperature; requires external pull-up to system rail (e.g., 10kΩ to 5V). |
| 4 (VIN) | Main power input | Accepts 5–55V; requires ≥10μF X7R ceramic decoupling capacitor placed within 3mm of pin to suppress high-frequency ripple. |
| 5,6 (SW) | Integrated NDMOS switch drain | Connects to inductor and freewheel diode anode; high dv/dt node requiring minimized trace length and guard ring to reduce EMI. |
| 8 (CTRL) | Multi-function control | Enables ON/OFF, analog dimming (0.4–2.5V), or PWM dimming (0–0.3V / >2.6V); soft-start time adjustable via CCTRL-to-GND. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C ambient), PPAP-capable, manufactured in IATF 16949 facilities - meets OEM requirements for front-end lighting. |
| Integrated power switch | 55V/0.4Ω NDMOS - eliminates external FET, reduces BOM count, and improves efficiency over discrete solutions at 1A load. |
| Single-pin dimming | CTRL pin supports analog voltage, PWM, and soft-start capacitor - reduces MCU GPIO usage and simplifies firmware control logic. |
| Inherent fault protection | Detects LED open, RSET short, and overtemperature without external circuitry - enables fail-safe operation in safety-critical lighting. |
| High efficiency | Up to 97% at 16V input - minimizes thermal stress in sealed headlamp housings and extends LED lifetime under continuous operation. |
Applications
| Automotive Interior Lighting | Automotive Exterior Lighting |
|---|---|
|
Use Scenario: LED map lights, dome lights, and ambient footwell lighting in passenger cabins. IC Role / Device Role / Timing Role: Constant-current LED driver regulating brightness across varying battery voltage (9–16V) and temperature (−40°C to +85°C). Use Value: Maintains consistent luminance without flicker or color shift, meeting OEM interior lighting homogeneity specifications (e.g., UNECE R147). |
Use Scenario: Daytime running lights (DRL), position lamps, and side marker lights on vehicle front/rear fascias. IC Role / Device Role / Timing Role: High-reliability LED current controller operating across extended input range (5–55V) during cold-crank and load-dump events. Use Value: Survives 65V transient spikes per ISO 7637-2 Pulse 5a, eliminating need for external TVS clamping in cost-sensitive DRL modules. |
| LED Headlamp Modules | Commercial Vehicle Lighting |
|
Use Scenario: Low-beam and high-beam LED arrays in adaptive driving beam (ADB) systems. IC Role / Device Role / Timing Role: Precision current source with fast PWM dimming (<1µs edge) enabling dynamic pixel-level intensity control. Use Value: Achieves >1000:1 dimming ratio at 100Hz PWM while maintaining ±4% current accuracy - critical for glare-free ADB compliance. |
Use Scenario: Tail lamps, brake lights, and turn signals in trucks and buses with 24V nominal systems. IC Role / Device Role / Timing Role: Robust LED driver qualified for extended temperature range (−40°C to +125°C ambient) and high-vibration environments. Use Value: Eliminates thermal derating above 85°C due to 150°C junction shutdown and 30°C hysteresis - ensures full 1A output in engine bay mounting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED constant-current driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8863QSP-13 | Same pinout and features but supports up to 1.5A output current and higher 60V input rating. | Better suited for high-power LED arrays (e.g., fog lamps) requiring >1A drive capability. | Select when peak LED current exceeds 1A or system must withstand >55V transients. |
| MPQ4425AGU-AEC1-P | 40V max input, 2A output, synchronous rectification, but no integrated FAULT pin or analog dimming on CTRL. | Lacks single-pin dimming and open-circuit LED detection - requires external monitoring circuitry for functional safety. | Choose only if higher current and synchronous efficiency outweigh loss of integrated diagnostics and simplified control. |
Compared with AL8862QSP-13, AL8863QSP-13 offers higher current headroom and transient tolerance at identical footprint, while MPQ4425AGU-AEC1-P trades diagnostic integration for higher efficiency and current capacity - making AL8862QSP-13 optimal for cost-sensitive, safety-aware automotive lighting where 1A suffices.
Availability
AL8862QSP-13 is available at Aetrix Electronics and suitable for automotive interior lighting, exterior lighting, and commercial vehicle lamp modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for AL8862QSP-13 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs for automotive, industrial, and consumer markets, with manufacturing certified to IATF 16949 and AEC-Q100 standards.
The AL8862QSP-13 belongs to Diodes' automotive-grade LED driver product line, designed specifically for AEC-Q100-compliant constant-current lighting applications in harsh vehicular environments.
FAQ
What is the maximum allowable voltage on the CTRL pin?
The CTRL pin must not exceed 5V under normal operation; voltages above 5V force the device into test mode and may compromise dimming accuracy or cause undefined behavior. For PWM dimming, the high-level threshold is 2.6V minimum, and low-level must remain below 0.3V to ensure reliable off-state control.
How does the AL8862QSP-13 handle LED open-circuit faults?
When an open-circuit condition occurs across the LED string, the SW pin voltage rises to VIN, causing the current-sense amplifier to detect zero current flow. This triggers the FAULT pin to assert low within 100ns propagation delay, signaling the host controller to disable the channel or log the fault.
Can the AL8862QSP-13 drive multiple parallel LED strings?
No - the AL8862QSP-13 is designed for series-connected LEDs only. Driving parallel strings would cause current imbalance due to Vf mismatch, violating the ±4% current accuracy specification. For parallel configurations, separate AL8862QSP-13 channels or a multi-channel driver like AL8865Q are required.
What is the minimum recommended input capacitance?
A minimum of 10μF X7R ceramic capacitor is required at the VIN pin, placed within 3mm of the package, to stabilize input voltage during high di/dt switching events. Lower values risk increased input ripple, reduced efficiency, and potential UVLO triggering during transient load steps.
AL8862QSP-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 5V
- Voltage - Supply (Max):
- 55V
- Voltage - Output:
- -
- Current - Output / Channel:
- 1A
- Frequency:
- 1MHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AL8862QSP-13 FAQ
1.How can I place an order for AL8862QSP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL8862QSP-13 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 AL8862QSP-13 reliable?
The price and inventory of AL8862QSP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL8862QSP-13 is usually 5 days.
3.What payment methods are accepted for AL8862QSP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL8862QSP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL8862QSP-13?
AL8862QSP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL8862QSP-13 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 AL8862QSP-13?
For technical support, including AL8862QSP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL8862QSP-13 requirements.
6.How does Aetrix verify that AL8862QSP-13 is sourced from the original manufacturer or authorized distributors?
All AL8862QSP-13 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 AL8862QSP-13 meets industry standards.
7.What is the process for return or replacement of AL8862QSP-13?
All AL8862QSP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL8862QSP-13, 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 AL8862QSP-13 part is unused and in its original packaging.
Return procedure for AL8862QSP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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