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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Diodes Incorporated AL8863SP-13

Name: AL8863SP-13
Brand: Diodes Incorporated
SKU: AL8863SP-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AL8863SP-13

Manufacturer:: Diodes Incorporated

Category:: LED Drivers

Package:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Datasheet:: AL8863SP-13.pdf

Description:: IC LED DRIVER CTRLR PWM 8SO

Quantity:: RFQ Add To RFQ list

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Inventory:18,096

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Product details

Overview

AL8863SP-13 from Diodes Incorporated is a 4.5V–60V input, hysteretic-mode buck LED controller in SO-8EP package, delivering up to 5A output current via external sense resistor (e.g., 0.02Ω), supporting 50kHz–1MHz switching frequency and 1000:1 PWM dimming at 100Hz for commercial/industrial LED lighting drivers.

For engineers reviewing the AL8863SP-13 datasheet, AL8863SP-13 pinout, AL8863SP-13 application, or AL8863SP-13 equivalent, key selection criteria include its fault-flag reporting (open/short LED, overtemperature), programmable thermal fold-back via NTC pin, high-side current sensing architecture, and single-pin PWM/dim control with soft-start capacitor option.

Technical Context

The AL8863 operates in constant-current hysteretic control mode, using internal comparator thresholds (95–105mV VSENSE) to regulate LED current by toggling the DRV gate driver based on voltage across an external high-side sense resistor. Its fault detection logic monitors CSN–OSP differential voltage (<1V for 23ms), DRV high-time accumulation (416µs), and junction temperature (>165°C) to assert open-drain FAULT.

Thermal management integrates dual protection layers: fixed overtemperature shutdown (165°C, 30°C hysteresis) and user-programmable thermal fold-back via NTC bias current (100µA) that reduces output current from 100% to 35% as NTC pin voltage drops from 1.3V to 1.0V.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 60V - supports wide-range industrial DC supplies and automotive battery systems without pre-regulation.
Switching Frequency	50kHz to 1MHz - enables compact magnetics and EMI optimization; 1MHz operation permits <10µH inductors.
Current Sense Threshold	100mV typical (±5mV) - sets nominal LED current as I_OUT = 1.0V / R_SET; e.g., 0.033Ω yields 3A.
PWM Dimming Resolution	1000:1 at 100Hz - achieves precise brightness control in architectural lighting with minimal flicker.
Fault Reporting	Active-low open-drain FAULT pin - signals open-circuit LED, short-circuit LED, or overtemperature via single wire with external pull-up.
Thermal Fold-Back	Programmable via NTC pin (1.3V start, 1.0V full fold-back) - dynamically scales output current to prevent thermal runaway in enclosed fixtures.
Gate Driver Strength	R_GH = 5.7Ω, R_GL = 2.2Ω - drives standard MOSFETs with fast t_RISE/t_FALL (100ns/60ns) for efficient high-frequency operation.

Pinout & Package

AL8863SP-13 uses a thermally enhanced SO-8EP package (6.2mm × 5.8mm, 1.75mm height) with exposed pad (EP) soldered to PCB ground plane for θ_JA = 56°C/W and θ_JC = 6°C/W performance.

Pin/Terminal	Circuit Role	Design Meaning
1 (OSP)	Output Short Protection input	Senses voltage difference between CSN and OSP pins to detect LED string short-circuit condition.
2 (DIM)	Multi-function control	Accepts PWM signal (0.3V/2.6V logic) for on/off and dimming; capacitor to GND adds soft-start delay (~0.06ms/nF).
3 (NTC)	Thermal fold-back reference	Connects to NTC thermistor; 100µA bias current generates voltage used to scale output current vs. temperature.
4 (GND)	Power and signal ground	Common return for internal circuitry, gate driver, and fault logic; must be low-impedance connection to EP pad.
5 (DRV)	High-side MOSFET gate driver	Push-pull output driving external N-channel MOSFET; clamped to 15V max for robustness.
6 (VIN)	Main power input	4.5–60V supply input; requires ≥10µF X7R ceramic decoupling capacitor placed adjacent to pin.
7 (FAULT)	Fault status indicator	Open-drain output pulled low during open-circuit LED, short-circuit LED, or overtemperature events.
8 (CSN)	Current sense negative input	High-side current sensing node; connects to one end of external sense resistor (other end to VIN).
EP	Exposed thermal pad	Must be soldered to large GND copper area with thermal vias; not for electrical conduction-only thermal path.

Key Features

Feature	Design Value
Hysteretic current regulation	Eliminates need for external compensation network; provides stable LED current control across input voltage and temperature variations.
Dual LED fault protection	Independent detection of open-circuit (416µs DRV-high accumulation) and short-circuit (CSN–OSP <1V for 23ms) conditions with FAULT pin assertion.
Single-pin PWM interface	Combines enable, dimming, and soft-start functions on DIM pin-reduces system BOM count and simplifies microcontroller GPIO usage.
Programmable thermal management	NTC-based fold-back allows custom thermal derating curves for specific fixture geometries without firmware changes.
Robust gate driver	Integrated 5.7Ω high-side and 2.2Ω low-side drivers support fast MOSFET switching up to 1MHz with minimal external components.

Applications

Commercial Lighting

Industrial High-Bay

Use Scenario: Indoor office ceiling panels with 12–24V DC bus and multi-string LED arrays.

IC Role / Device Role / Timing Role: Buck LED controller regulating constant current to parallel LED strings while reporting faults to building management system via FAULT pin.

Use Value: Eliminates ballast resistors and enables uniform brightness across strings; FAULT pin integration reduces wiring complexity for predictive maintenance.

Use Scenario: Warehouse high-bay luminaires powered from 48V telecom-grade DC distribution.

IC Role / Device Role / Timing Role: Primary current regulator driving high-power single-string LEDs (up to 5A) with thermal fold-back to sustain output in hot ambient environments.

Use Value: Maintains >90% lumen output at 65°C ambient by scaling current only when NTC threshold is crossed-no abrupt shutdown.

Architectural Facade

Smart Streetlight

Use Scenario: RGBW color-tunable façade modules requiring synchronized dimming across hundreds of nodes.

IC Role / Device Role / Timing Role: Constant-current driver accepting 100Hz PWM input for smooth color mixing; FAULT pin feeds into local diagnostics controller.

Use Value: 1000:1 dimming resolution ensures imperceptible grayscale steps; open-circuit detection prevents single-LED failure from disabling entire module.

Use Scenario: Solar-powered streetlights with 36–60V battery input and adaptive thermal management.

IC Role / Device Role / Timing Role: LED driver with programmable NTC fold-back and overtemperature shutdown to protect against solar-heated enclosures.

Use Value: Prevents thermal runaway in sealed pole-mounted fixtures by reducing drive current before reaching critical junction temperature.

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck LED controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL8862SP-13	Same pinout and feature set but lacks OSP pin and short-circuit detection capability.	Suitable only where LED short-circuit risk is negligible (e.g., protected downstream circuits).	Select AL8862SP-13 if cost sensitivity outweighs need for comprehensive fault coverage.
LM3409MM/NOPB	Analog current-mode controller with adjustable frequency (200kHz–2MHz), no integrated FAULT reporting or thermal fold-back.	Requires external comparators and logic for fault signaling; thermal management needs discrete circuitry.	Choose LM3409MM/NOPB when design flexibility in loop compensation and higher frequency operation (>1MHz) is prioritized over integrated protection.

Compared with AL8862SP-13, AL8863SP-13 adds dedicated short-circuit detection and fault flag reporting; versus LM3409MM/NOPB, it integrates thermal fold-back, open/short fault logic, and single-pin PWM control-reducing bill-of-materials and layout complexity for production lighting designs.

Availability

AL8863SP-13 is available at Aetrix Electronics and suitable for commercial lighting, industrial high-bay fixtures, and architectural LED drivers requiring stable component supply, long-lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for AL8863SP-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 solutions, with emphasis on power management, signal integrity, and lighting control ICs.

The AL8863 belongs to Diodes' high-voltage LED controller product line, engineered specifically for robust, thermally adaptive constant-current drivers in demanding commercial and industrial lighting applications.

FAQ

What is the minimum recommended external current sense resistor value for AL8863SP-13?

The minimum recommended R_SET is 0.02Ω, enabling up to 5A nominal LED current (I_OUT = 1.0V / 0.02Ω). Lower values increase current-sense noise susceptibility and reduce accuracy due to VSENSE hysteresis (±13mV); 0.033Ω (3A) and 0.1Ω (1A) are preferred for stability in most designs.

How does the AL8863SP-13 handle LED open-circuit conditions?

During open-circuit, the CSN voltage collapses near VIN, causing DRV to remain high continuously. After 416µs of sustained high DRV, the FAULT pin pulls low. The device resumes normal operation automatically once the open circuit is corrected, with no latch or manual reset required.

Can AL8863SP-13 operate without an external NTC thermistor?

Yes-the NTC pin is optional. Without connection, thermal fold-back is disabled, but overtemperature shutdown (165°C) remains active. Leaving NTC unconnected or floating disables fold-back; grounding it forces full current reduction. A 10kΩ NTC at 25°C is typical for 70°C break-point configuration.

What is the maximum allowable PWM dimming frequency for full 1000:1 resolution?

Full 1000:1 resolution is guaranteed at 100Hz. At 500Hz, dimming accuracy remains better than 1% across 1–100% duty cycle. Above 1kHz, resolution degrades due to interaction between PWM period and AL8863's minimum on-time (500ns); for >10kHz, use analog dimming or consider alternative controllers.

AL8863SP-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 Controller

Topology:: Step-Down (Buck)

Internal Switch(s):: No

Number of Outputs:: 1

Voltage - Supply (Min):: 4.5V

Voltage - Supply (Max):: 60V

Voltage - Output:: -

Current - Output / Channel:: -

Frequency:: 50kHz ~ 1MHz

Dimming:: PWM

Applications:: Commercial & Industrial Lighting

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SO-EP

AL8863SP-13 FAQ

1.How can I place an order for AL8863SP-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AL8863SP-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 AL8863SP-13 reliable?

The price and inventory of AL8863SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL8863SP-13 is usually 5 days.

3.What payment methods are accepted for AL8863SP-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL8863SP-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AL8863SP-13?

AL8863SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AL8863SP-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 AL8863SP-13?

For technical support, including AL8863SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL8863SP-13 requirements.

6.How does Aetrix verify that AL8863SP-13 is sourced from the original manufacturer or authorized distributors?

All AL8863SP-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 AL8863SP-13 meets industry standards.

7.What is the process for return or replacement of AL8863SP-13?

All AL8863SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL8863SP-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 AL8863SP-13 part is unused and in its original packaging.

Return procedure for AL8863SP-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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