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Diodes Incorporated AL8861MP-13
- Part No.:
- AL8861MP-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
AL8861MP-13.pdf
- Description:
- IC LED DRVR RGLTR PWM 1.5A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:70,433
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Product details
Overview
AL8861MP-13 from Diodes Incorporated is a hysteresis-mode DC-DC buck LED driver IC with integrated 40V NDMOS switch, designed to drive series-connected LEDs from 4.5V–40V input. It delivers up to 1.5A output current in MSOP-8EP package, achieves up to 97% efficiency, and supports analog/PWM dimming via single VSET pin for retrofit lighting and industrial LED systems.
For engineers reviewing the AL8861MP-13 datasheet, AL8861MP-13 pinout, AL8861MP-13 application, or AL8861MP-13 equivalent, this page provides verified pin functions, real-world dimming behavior (5–100% analog range, 1–100% PWM), thermal protection thresholds (+150°C OTP), and package-specific current ratings (TSOT25: 1A; SOT89-5/MSOP-8EP: 1.5A).
Technical Context
The AL8861MP-13 operates in fixed-frequency hysteresis mode, using internal current sensing across an external RS resistor to regulate average LED current. Its comparator monitors ISENSE voltage (typical 100mV threshold) against upper/lower hysteresis bands to control LX switching.
Dimming is implemented through the VSET pin: DC voltage (0.3–2.5V) enables linear analog control; PWM signal (<500Hz recommended) enables digital brightness adjustment. Soft-start is externally adjustable via capacitor from VSET to GND (1.5ms/nF), with default time of 0.1ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 40V - supports wide-range DC inputs including 12VAC rectified, 24V industrial rails, and automotive battery variations. |
| Max Output Current | 1.5A - achievable in MSOP-8EP and SOT89-5 packages; limited to 1A in TSOT25 due to thermal resistance (θJA = 147°C/W). |
| Current Sense Accuracy | ±5% typical - determined by internal 100mV ±4mV ISENSE threshold and external RS tolerance; enables stable LED current without calibration. |
| Switching Frequency | Up to 1MHz - allows compact inductor selection (e.g., 33μH–100μH); frequency varies with VIN, VO, and L to maintain hysteresis stability. |
| Dimming Interface | VSET pin accepts 0.3–2.5V DC or open-drain PWM - eliminates need for separate enable/dim pins; supports direct MCU GPIO control. |
| Protection Features | LED open-circuit, RS short, LX overcurrent (2A peak), and +150°C OTP with +30°C hysteresis - ensures robust operation under fault conditions without external circuitry. |
| Efficiency | Up to 97% - achieved via low RDS(on) internal NDMOS (typ. 0.2Ω) and optimized hysteresis control, reducing thermal load in enclosed fixtures. |
Pinout & Package
AL8861MP-13 is supplied in Pb-free, RoHS-compliant MSOP-8EP package with exposed pad for enhanced thermal dissipation (θJC = 15°C/W). Pin numbering follows standard top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ISENSE) | Current sense input | Connects to RS resistor between VIN and ISENSE; sets nominal LED current as IOUTNOM = 0.1V / RS (e.g., RS = 0.067Ω → 1.5A). |
| 2,3 (GND) | Power and signal ground | Dual GND pins reduce ground impedance and improve current-sense accuracy; must be tied to common low-impedance PCB ground plane. |
| 4 (LX) | Switch node | Drain of internal NDMOS; connects to inductor and freewheeling diode cathode; requires tight layout to minimize EMI and switching losses. |
| 5 (VIN) | Power input | 4.5V–40V supply input; requires ≥10μF X7R ceramic decoupling capacitor placed within 2mm of pin for stable high-frequency operation. |
| 6 (N/C) | No connection | Internally unconnected; must remain floating - no routing or soldering required. |
| 7 (VSET) | Multi-function control | Enables on/off (≤0.2V), analog dimming (0.3–2.5V), PWM dimming, and soft-start (capacitor to GND); internal 1.4µA pull-up when floating. |
| 8 (EP) | Exposed thermal pad | Internally connected to GND; must be soldered to ≥200mm² copper pour with ≥4 thermal vias for reliable 1.5A operation at +85°C ambient. |
Key Features
| Feature | Design Value |
|---|---|
| Single-pin dimming & enable | VSET pin integrates on/off, analog dimming (5–100%), and PWM control - reduces BOM count and simplifies MCU interface. |
| Hysteresis-mode regulation | Eliminates need for external compensation network; maintains stable LED current across input/output voltage variations without loop tuning. |
| Inherent open-circuit LED protection | Auto-shutdown when LED string opens - prevents LX overvoltage and protects downstream components without external sensing circuitry. |
| Adjustable soft-start | Capacitor from VSET to GND adds ~1.5ms/nF delay - prevents inrush current in multi-channel LED arrays and improves PWM dimming fidelity. |
| Thermal shutdown with hysteresis | +150°C trip with +30°C hysteresis - allows safe recovery after transient overload without oscillation or latch-up. |
Applications
| LED Retrofit for Low Voltage Halogen | Low Voltage Industrial Lighting |
|---|---|
Use Scenario: Replacing 12V AC halogen lamps with efficient LED modules in existing track or pendant fixtures. IC Role / Device Role / Timing Role: Buck LED driver regulating constant current to 3–9 series white LEDs; handles rectified 12VAC input with ripple tolerance. Use Value: Enables direct drop-in replacement without rewiring; 97% efficiency minimizes heat buildup in enclosed housings. |
Use Scenario: Powering LED strips or spotlights in factory control panels, machine vision lighting, or hazardous-area enclosures. IC Role / Device Role / Timing Role: Primary current regulator in 24VDC industrial power distribution; withstands voltage transients up to 42V. Use Value: Built-in RS short and LED open protection eliminate field failures; MSOP-8EP package supports convection-cooled designs. |
| LED Backlighting | Illuminated Signs |
Use Scenario: Driving edge-lit LCD backlights in kiosks, medical displays, or transportation infotainment panels. IC Role / Device Role / Timing Role: Constant-current source for uniform brightness across parallel LED strings; supports PWM dimming at 100–500Hz. Use Value: VSET-based PWM dimming achieves >1% resolution without flicker; 1MHz max switching enables ultra-thin inductor placement. |
Use Scenario: Powering channel letters, architectural signage, or advertising displays operating 24/7 in outdoor environments. IC Role / Device Role / Timing Role: High-reliability LED driver with -40°C to +85°C ambient rating and overtemperature recovery hysteresis. Use Value: 1.5A capability drives high-brightness LEDs per channel; inherent open-circuit protection prevents cascading failure in long LED strings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8863Q-13 | Automotive-qualified (AEC-Q100 Grade 1), same pinout and electrical specs; includes enhanced ESD (±3kV HBM) and wider temp range (-40°C to +125°C junction). | Required for automotive exterior lighting (headlamps, DRLs); not suitable for cost-sensitive commercial lighting where qualification overhead is unnecessary. | Select AL8863Q-13 only when AEC-Q100 compliance and extended temperature operation are mandatory. |
| LM3409MM/NOPB | Current-mode buck controller (external MOSFET), 4.5V–36V input, 1.25A max; requires external gate driver and current sense amplifier. | Offers higher design flexibility (MOSFET selection, thermal partitioning) but increases BOM count and layout complexity vs. AL8861MP-13's integrated switch. | Choose LM3409MM/NOPB when >1.5A output, discrete thermal management, or programmable frequency is required. |
Compared with AL8861MP-13, AL8863Q-13 adds automotive qualification at no performance trade-off, while LM3409MM/NOPB trades integration for scalability-making AL8861MP-13 optimal for compact, cost-sensitive, non-automotive LED systems needing ≤1.5A.
Availability
AL8861MP-13 is available at Aetrix Electronics and suitable for LED retrofit lighting, low-voltage industrial lighting, and illuminated signage requiring stable component supply, RoHS compliance, and thermal reliability across -40°C to +85°C ambient.
Supply support for AL8861MP-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 focus on power management, signal integrity, and LED lighting control.
The AL8861 product line delivers highly integrated, thermally robust LED drivers for commercial and industrial lighting applications where simplicity, reliability, and high efficiency are critical.
FAQ
What is the maximum continuous output current for AL8861MP-13?
The AL8861MP-13 supports up to 1.5A continuous output current when mounted in the MSOP-8EP package with proper thermal design (≥200mm² copper pour, ≥4 thermal vias). This rating assumes TA ≤ +85°C and VIN = 16V. At higher ambient temperatures or lower input voltages, derating applies per the θJA = 56°C/W specification.
Can AL8861MP-13 operate from rectified 12VAC input?
Yes - the AL8861MP-13 accepts 4.5V–40V DC input, making it compatible with full-wave rectified 12VAC (≈17V peak). Input capacitance ≥10μF X7R must be used to maintain minimum 4.5V during AC zero-crossings; typical application circuits confirm stable operation with 12VAC-derived input.
How does analog dimming accuracy vary across the 5–100% range?
Analog dimming via VSET achieves ±5% LED current accuracy from 5% to 100% of nominal output, based on internal 100mV ±4mV sense threshold and linear VSET-to-current transfer function. Below 5%, accuracy degrades due to comparator offset; the datasheet specifies 5% as the recommended lower limit for stable regulation.
Is the MSOP-8EP exposed pad electrically connected?
Yes - the exposed pad (EP, Pin 8) is internally connected to GND. It must be soldered to a dedicated GND copper area with ≥4 thermal vias to achieve specified θJC = 15°C/W and sustain 1.5A operation at +85°C ambient. Leaving it unconnected violates thermal specifications and risks premature OTP shutdown.
AL8861MP-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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):
- 4.5V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 1.5A
- Frequency:
- 1MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Lighting, Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
AL8861MP-13 FAQ
1.How can I place an order for AL8861MP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL8861MP-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 AL8861MP-13 reliable?
The price and inventory of AL8861MP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL8861MP-13 is usually 5 days.
3.What payment methods are accepted for AL8861MP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL8861MP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL8861MP-13?
AL8861MP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL8861MP-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 AL8861MP-13?
For technical support, including AL8861MP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL8861MP-13 requirements.
6.How does Aetrix verify that AL8861MP-13 is sourced from the original manufacturer or authorized distributors?
All AL8861MP-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 AL8861MP-13 meets industry standards.
7.What is the process for return or replacement of AL8861MP-13?
All AL8861MP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL8861MP-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 AL8861MP-13 part is unused and in its original packaging.
Return procedure for AL8861MP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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