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Diodes Incorporated AL8820SP-13
- Part No.:
- AL8820SP-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AL8820SP-13.pdf
- Description:
- IC LED DRIVER OFFL 2A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,069
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Product details
Overview
AL8820SP-13 from Diodes Incorporated is a dual-stage 40V, 2A boost/buck LED driver IC optimized for MR16/AR111 lamp applications with electronic transformer compatibility. It integrates two N-channel MOSFETs (40V, 250mΩ RDSON), operates in continuous conduction mode (CCM), delivers >0.9 power factor and <30% THD, and regulates LED current via external RSET2. Its primary role is AC-input–to–constant-current DC conversion for directional lighting.
For engineers reviewing the AL8820SP-13 datasheet, AL8820SP-13 pinout, AL8820SP-13 application, or AL8820SP-13 equivalent, key selection criteria include dual-stage PFC + buck topology, SO-8EP thermal performance, VIN range (5–36V), integrated protection (UVLO, OTP, open/short LED), and compatibility with legacy electronic transformers in retrofit LED lamps.
Technical Context
The AL8820SP-13 implements a proprietary hysteresis-controlled boost PFC stage followed by a current-mode buck regulator. The boost stage sets VIN (5–36V) using SW1/CS1/FB/COMP, while the buck stage regulates LED current via CS2 and SW2 - both stages share internal 40V/2A MOSFETs with 250mΩ RDSON. Control logic includes dynamic COMP voltage scaling (0–5V) to adjust hysteresis thresholds based on load and input conditions.
Functional block integration includes dual overvoltage protection (FB OVP at 1.66V, VIN OVP at 39V), temperature-triggered shutdown at +160°C with +40°C hysteresis, and internal 5V VCC regulation with 10mA sourcing capability. The device requires no external gate drivers and supports up to 1MHz switching frequency in the boost stage and ~300kHz in the buck stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 36V - supports wide-range DC input derived from rectified AC or electronic transformer outputs. |
| Output Current | 2A - maximum continuous LED load current regulated by RSET2 (ILED = 100mV / RSET2). |
| Power Factor & THD | >0.9 PF and <30% THD - meets EN61000-3-2 Class C requirements for lighting equipment without external PFC circuitry. |
| Switching Frequency | Up to 1MHz (boost), ~300kHz (buck) - enables compact magnetics while balancing efficiency and EMI. |
| Thermal Protection | +160°C shutdown with +40°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| MOSFET RDSON | 250mΩ (both SW1 and SW2) - reduces conduction loss and improves efficiency in high-current MR16/AR111 designs. |
| Package Thermal Resistance | θJA = 66°C/W - measured on FR-4 PCB with 2oz copper and thermal vias; enables 2A operation with minimal heatsink area. |
Pinout & Package
AL8820SP-13 uses a thermally enhanced SO-8EP package with exposed pad (Pin 9) tied to ground for improved heat dissipation. The 8-pin layout supports dual DC/DC control with dedicated sense, feedback, and switch terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW1) | Boost Stage MOSFET Drain | Connects to boost inductor and output diode; handles up to 40V/2A switching stress. |
| 2 (CS1) | Boost Input Current Sense | Monitors inductor current for hysteresis-based peak/valley control; threshold set by RHYS resistor. |
| 3 (FB) | Boost Output Voltage Feedback | Regulates boost output (VIN) to maintain stable buck input; triggers OVP at 1.66V. |
| 4 (COMP) | Boost Loop Compensation & Soft-Start | Controls hysteresis window via external capacitor; voltage scales from 0–5V to adapt to line/load changes. |
| 5 (CS2) | Buck Output Current Sense | Senses voltage across RSET2 to regulate constant LED current; nominal 100mV threshold. |
| 6 (VIN) | Buck Stage Input Supply | Accepts regulated boost output (5–36V); powers buck controller and internal circuitry. |
| 7 (VCC) | Internal Bias Supply | 5V-regulated internal rail; powers gate drivers and logic; requires ≥4.7µF ceramic decoupling. |
| 8 (SW2) | Buck Stage MOSFET Drain | Drives buck inductor and LED string; shares same 40V/2A/250mΩ MOSFET spec as SW1. |
| 9 (EP) | Exposed Thermal Pad | Must be soldered to PCB ground plane; primary thermal path for 2A power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Stage Architecture | Integrated boost PFC + buck current regulator eliminates need for separate ICs and simplifies BOM for MR16/AR111 retrofit lamps. |
| Electronic Transformer Compatibility | Hysteresis control and wide 5–36V VIN range enable stable operation with legacy magnetic/electronic transformers without flicker or dropout. |
| High Efficiency at 2A | 250mΩ RDSON MOSFETs and CCM operation reduce conduction loss, enabling >85% typical system efficiency at full load. |
| Comprehensive Protection Set | UVLO (4.2V), FB/VIN OVP, OTP (+160°C), and open/short LED detection prevent field failures in unattended lighting installations. |
| SO-8EP Thermal Performance | Exposed pad and 66°C/W θJA allow 2A continuous operation on standard FR-4 without external heatsinks in enclosed lamp housings. |
Applications
| MR16 Retrofit Lamps | AR111 Directional Lighting |
|---|---|
|
Use Scenario: Replacing halogen MR16 lamps in track and recessed lighting with AC-powered LED modules. IC Role / Device Role / Timing Role: Dual-stage LED driver providing AC-to-constant-current DC conversion with electronic transformer compatibility and PFC. Use Value: Eliminates lamp flicker and inrush issues common with legacy transformers while meeting IEC62384 THD limits. |
Use Scenario: High-lumen AR111 spotlights used in retail and museum accent lighting with dimmable AC input. IC Role / Device Role / Timing Role: Constant-current buck regulator fed by integrated boost PFC stage; maintains stable LED current across 12–24VAC input variations. Use Value: Delivers consistent lumen output and color point despite input voltage sag or transformer aging. |
| Commercial Downlights | Architectural LED Modules |
|
Use Scenario: Integrated LED downlight engines requiring compact, thermally efficient driver solutions in tight ceiling cavities. IC Role / Device Role / Timing Role: Primary LED current controller with integrated MOSFETs and thermal shutdown; manages 2A load in confined space. Use Value: SO-8EP package enables direct PCB mounting with minimal footprint and reliable thermal transfer to metal housing. |
Use Scenario: Custom LED modules for architectural cove and linear lighting where input compatibility with existing AC infrastructure is critical. IC Role / Device Role / Timing Role: AC-input–capable LED driver delivering regulated current without external PFC or isolation components. Use Value: Reduces bill-of-materials count by integrating both power stages and protections into single SO-8EP IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-stage LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8862SP-13 | Higher 60V input rating, 1.5A output, fixed-frequency PWM (not hysteresis), no integrated boost MOSFET - requires external FET. | Targets higher-voltage industrial LED fixtures; lacks electronic transformer compatibility due to different control scheme. | Select when input exceeds 36V or when precise frequency control is required over transformer compatibility. |
| PT4115E | Single-stage buck-only LED driver; no boost/PFC stage; 30V max input; 1.2A output; external MOSFET required. | Only suitable for DC-input LED lamps or AC systems with pre-regulated DC bus - cannot replace AL8820 in MR16/AR111 with ET. | Choose only for low-cost, low-power DC-fed applications where PFC and transformer compatibility are irrelevant. |
Compared with AL8820SP-13, AL8862SP-13 trades hysteresis-based transformer compatibility for higher voltage tolerance and fixed-frequency EMI control, while PT4115E omits the entire boost stage - making it unsuitable for AC-input MR16/AR111 replacement without upstream DC conversion.
Availability
AL8820SP-13 is available at Aetrix Electronics and suitable for MR16 retrofit lamps, AR111 directional lighting, and commercial downlights requiring stable component supply and long-term production continuity.
Supply support for AL8820SP-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 devices for power management, signal integrity, and lighting applications.
The AL8820 belongs to Diodes' LED driver product line, designed specifically for AC-input–compatible, high-efficiency retrofit lighting solutions targeting MR16/AR111 form factors and electronic transformer interoperability.
FAQ
Is AL8820SP-13 recommended for new designs?
No - Diodes Incorporated explicitly marks AL8820 as "NOT RECOMMENDED FOR NEW DESIGN" in its official datasheet (DS37369 Rev. 2-3). This designation reflects end-of-life planning and lack of long-term availability assurance. Engineers should evaluate AL8862 or other active-part alternatives for new projects, though AL8820SP-13 remains supported for legacy production and repair.
What is the function of the COMP pin, and how is it used in design?
The COMP pin serves dual roles: soft-start initiation and boost-stage loop compensation. Its voltage (0–5V) dynamically adjusts hysteresis thresholds for CS1 sensing. A 1µF ceramic capacitor to ground stabilizes the control loop under varying AC input conditions, especially with electronic transformers. External RC networks are not required unless fine-tuning transient response.
How does AL8820SP-13 achieve high power factor without external components?
It uses a proprietary hysteresis-controlled boost PFC stage that shapes input current to closely follow the AC voltage waveform. Combined with wide 5–36V input range and adaptive COMP voltage scaling, this achieves >0.9 PF and <30% THD inherently - eliminating need for external PFC controllers, boost inductors, or diodes in MR16/AR111 applications.
Can AL8820SP-13 drive multiple parallel LED strings?
No - AL8820SP-13 regulates current through a single external sense resistor (RSET2), supporting only one series-connected LED string. Driving parallel strings would cause current imbalance due to VF mismatch and is not supported by the architecture. For multi-string configurations, separate AL8820 channels or alternative multi-channel drivers are required.
AL8820SP-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:
- Obsolete
- Type:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 5V
- Voltage - Supply (Max):
- 36V
- Voltage - Output:
- 40V
- Current - Output / Channel:
- 2A
- Frequency:
- 1MHz
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AL8820SP-13 FAQ
1.How can I place an order for AL8820SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL8820SP-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 AL8820SP-13 reliable?
The price and inventory of AL8820SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL8820SP-13 is usually 5 days.
3.What payment methods are accepted for AL8820SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL8820SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL8820SP-13?
AL8820SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL8820SP-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 AL8820SP-13?
For technical support, including AL8820SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL8820SP-13 requirements.
6.How does Aetrix verify that AL8820SP-13 is sourced from the original manufacturer or authorized distributors?
All AL8820SP-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 AL8820SP-13 meets industry standards.
7.What is the process for return or replacement of AL8820SP-13?
All AL8820SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL8820SP-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 AL8820SP-13 part is unused and in its original packaging.
Return procedure for AL8820SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AL8820SP-13 Tags
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