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Diodes Incorporated AL9910AS-13
- Part No.:
- AL9910AS-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AL9910AS-13.pdf
- Description:
- IC LED DRIVER OFFL PWM 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,460
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Product details
Overview
AL9910AS-13 from Diodes Incorporated is a universal high-voltage PWM LED driver-controller designed for offline LED lamp applications operating directly from rectified AC mains (85–277VAC). It drives external MOSFETs up to 300kHz, regulates LED current via a single external sense resistor (typical 250mV threshold), supports both linear (LD pin) and PWM (PWM_D pin) dimming, and withstands input transients up to 500V. Used in non-isolated buck topologies for constant-current LED string control.
For engineers reviewing the AL9910AS-13 datasheet, AL9910AS-13 pinout, AL9910AS-13 application, or AL9910AS-13 equivalent, key selection criteria include its 10V gate drive capability (AL9910A variant), SO-8EP thermal performance (θJA = 66°C/W), ±5% current-sense tolerance (AL9910A-5 grade), integrated thermal shutdown at +150°C, and dual-dimming interface compatibility with legacy lighting control systems.
Technical Context
The AL9910AS-13 implements a peak-current-mode buck controller with internal 10V LDO regulation (AL9910A variant), enabling direct gate drive of external N-channel MOSFETs without bootstrap circuitry. Its oscillator frequency (20–300kHz) is set by an external ROSC-to-GND resistor, and it supports constant-off-time (PFM) mode when ROSC is connected to the MOSFET gate.
Current regulation relies on real-time sensing of the external MOSFET's source current via the CS pin, with blanking (160–440ns) to suppress switching noise. The LD pin provides analog current-threshold scaling (45–250mV), while PWM_D enables full-cycle enable/disable control with 200kΩ internal pulldown - supporting TTL-compatible dimming signals up to several kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 20V to 500V DC - supports universal rectified AC inputs (85–277VAC RMS) and transient resilience in mains-connected lighting. |
| Gate Drive Voltage | 10V nominal - sufficient to fully enhance standard logic-level and standard-threshold N-channel MOSFETs in high-efficiency buck stages. |
| Current-Sense Threshold | 255mV typical (AL9910A-5 grade, ±5%) - sets LED string current accuracy and enables precise external RSENSE selection (e.g., 0.255Ω for 1A). |
| Switching Frequency Range | 20kHz to 300kHz - adjustable via ROSC resistor; higher frequencies reduce inductor size but increase switching losses. |
| Thermal Protection | Fixed +150°C junction shutdown with +50°C hysteresis - prevents thermal runaway during overload or poor heatsinking in enclosed luminaires. |
| Dimming Interfaces | LD pin (45–250mV analog) + PWM_D pin (0–100% duty, TTL-compatible) - enables hybrid dimming schemes without external DACs or microcontrollers. |
| Package Thermal Resistance | θJA = 66°C/W (SO-8EP) - enables 2.2W power dissipation at +85°C ambient, critical for high-power LED drivers in compact fixtures. |
Pinout & Package
AL9910AS-13 is housed in a thermally enhanced SO-8EP package with exposed pad (EP) electrically and thermally connected to GND. The EP must be soldered to a dedicated PCB ground plane with thermal vias for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | High-voltage input supply | Accepts up to 500V DC; powers internal LDO and UVLO circuitry - requires X/Y-rated input capacitor and surge protection. |
| CS (Pin 2) | Current-sense input | Monitors voltage across external RSENSE; 255mV threshold triggers MOSFET turn-off - blanked for 160–440ns after each switch event. |
| GND (Pin 3) | Power and signal reference | Common return for CS, PWM_D, LD, ROSC, and EP pad - must be low-impedance and star-connected near RSENSE. |
| GATE (Pin 4) | MOSFET gate driver output | 10V push-pull driver capable of ±10mA; rise/fall times ≤50ns into 500pF - minimizes switching losses in fast MOSFETs. |
| PWM_D (Pin 5) | Enable/dimming control | TTL-compatible input with 200kΩ internal pulldown; <1V disables IC, >2.4V enables - supports direct connection to microcontroller GPIO. |
| VDD (Pin 6) | Internally regulated supply | 10V LDO output (AL9910A); supplies internal logic and gate driver - can source ≤1mA for auxiliary circuitry (e.g., bias resistors). |
| LD (Pin 7) | Linear dimming input | Analog voltage input (0–250mV) that scales current-sense threshold - enables smooth 0–100% dimming without PWM flicker. |
| ROSC (Pin 8) | Oscillator timing control | Resistor-to-GND sets frequency (20–300kHz); connecting to MOSFET gate enables constant-off-time (PFM) operation for light-load efficiency. |
| EP Pad | Exposed thermal pad | Must be soldered to solid GND copper area with ≥4 thermal vias - reduces θJA from 110°C/W (SO-8) to 66°C/W (SO-8EP). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 10V LDO regulator | Eliminates startup resistor and auxiliary winding - reduces BOM count and improves reliability in AC/DC LED drivers. |
| ±5% current-sense tolerance (AL9910A-5) | Enables ±5% LED current accuracy without trimming - critical for consistent lumen output across production batches. |
| SO-8EP thermal enhancement | 66°C/W junction-to-ambient resistance - allows 2.2W continuous dissipation at +85°C ambient, supporting >30W LED loads. |
| Dual dimming architecture | Independent LD (analog) and PWM_D (digital) inputs - permits hybrid dimming (e.g., daylight harvesting + occupancy-based PWM) in smart lighting. |
| 500V absolute max input rating | Withstands 1.2/50μs surges up to 4kV (IEC 61000-4-5 Level 3) without external clamping - simplifies surge protection design. |
Applications
| Street Lighting | Commercial Downlights |
|---|---|
|
Use Scenario: Outdoor LED street lamps powered directly from 277VAC distribution lines with surge-prone utility infrastructure. IC Role / Device Role / Timing Role: Constant-current buck controller regulating 700mA–1.5A LED strings; handles line transients up to 500V and maintains stable output across -40°C to +85°C ambient. Use Value: Eliminates need for isolated flyback converters - reduces system cost by 30% and improves efficiency to >90% at full load. |
Use Scenario: Recessed troffer and panel downlights in office buildings using 120/277VAC infrastructure with DALI or 0–10V dimming interfaces. IC Role / Device Role / Timing Role: Primary LED current controller interfacing with external 0–10V dimmer via LD pin; supports seamless 1–100% dimming without color shift. Use Value: Enables Class A power factor (>0.9 at 277VAC) and THD <20% without active PFC - meets ENERGY STAR V2.1 requirements. |
| Architectural Signage | Industrial High-Bay Fixtures |
|
Use Scenario: RGBW LED channel letters and façade lighting requiring precise current matching across multiple parallel strings. IC Role / Device Role / Timing Role: Multi-string current controller using one AL9910AS-13 per string; ROSC-synchronized switching minimizes EMI coupling between adjacent drivers. Use Value: ±5% current matching ensures uniform brightness and color point across large installations - eliminates visible banding in white-light arrays. |
Use Scenario: Warehouse high-bay luminaires operating 24/7 under high ambient temperatures (up to +65°C) with minimal airflow. IC Role / Device Role / Timing Role: Thermally robust LED driver using SO-8EP package and internal OTP; maintains full output current until junction reaches +150°C. Use Value: Extends luminaire lifetime by preventing thermal derating - delivers rated lumen output for >50,000 hours at +65°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage LED driver-controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL9910A-13 | Same SO-8EP package and 10V gate drive, but ±6% current-sense tolerance (vs. ±5% for AL9910AS-13) and no "-S" suffix indicating tape-and-reel packaging optimization. | Targeted at cost-sensitive general lighting where ±6% LED current variation is acceptable; lacks optimized reel packaging for high-speed SMT placement. | Select AL9910A-13 only if BOM cost reduction outweighs need for tighter current matching and automated assembly compatibility. |
| AL9910-13 | 7.5V gate drive (not 10V), ±5% tolerance, SO-8 (non-EP) package - higher θJA (110°C/W) limits power handling to ~630mW. | Suitable for low-power (<10W) LED modules where thermal headroom is available and lower gate drive suffices for small MOSFETs. | Choose AL9910-13 only for space-constrained designs below 10W output where SO-8 footprint is mandatory and thermal margin exists. |
Compared with AL9910A-13 and AL9910-13, AL9910AS-13 uniquely combines ±5% current accuracy, 10V gate drive, SO-8EP thermal performance, and tape-and-reel packaging - making it the optimal choice for high-reliability, high-power, automated-production LED drivers requiring tight current regulation and thermal headroom.
Availability
AL9910AS-13 is available at Aetrix Electronics and suitable for street lighting, commercial downlights, and industrial high-bay fixtures requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for AL9910AS-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and lighting applications.
The AL9910AS-13 belongs to Diodes' high-voltage LED driver-controller product line, engineered specifically for cost-effective, efficient, and thermally robust offline LED lighting systems operating directly from AC mains.
FAQ
What is the maximum recommended input voltage for continuous operation?
The AL9910AS-13 supports continuous DC input voltages from 20V to 500V, with absolute maximum rating of +520V on VIN. For reliable long-term operation in 277VAC systems, design input capacitors and surge protection to limit peak rectified voltage to ≤400V - ensuring margin against line swells and transients per IEC 61000-4-5.
Can AL9910AS-13 drive MOSFETs without an external gate resistor?
Yes - the AL9910AS-13's GATE pin delivers ±10mA with ≤50ns rise/fall times into 500pF, enabling direct drive of small-to-medium MOSFETs (Qg < 20nC). However, a 5–10Ω series gate resistor is recommended to dampen ringing, reduce EMI, and prevent shoot-through in high-side configurations with parasitic inductance.
How does the LD pin interact with PWM dimming?
The LD pin sets the current-sense threshold (45–250mV), defining the maximum achievable LED current. PWM dimming via PWM_D modulates this maximum - e.g., 50% PWM duty at 250mV LD yields 50% average current. If LD is set to 125mV, 100% PWM duty produces only 50% full-scale current, limiting dimming range but improving low-end linearity.
Is the SO-8EP package pin-compatible with standard SO-8 footprints?
No - the SO-8EP has identical pinout numbering but includes an exposed thermal pad (EP) beneath the package body requiring a dedicated GND copper area and thermal vias. Standard SO-8 footprints lack this pad and thermal relief, resulting in >40°C higher junction temperature and potential thermal shutdown under load.
AL9910AS-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 20V
- Voltage - Supply (Max):
- 500V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 25kHz ~ 300kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Lighting, Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
AL9910AS-13 FAQ
1.How can I place an order for AL9910AS-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL9910AS-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 AL9910AS-13 reliable?
The price and inventory of AL9910AS-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL9910AS-13 is usually 5 days.
3.What payment methods are accepted for AL9910AS-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL9910AS-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL9910AS-13?
AL9910AS-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL9910AS-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 AL9910AS-13?
For technical support, including AL9910AS-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL9910AS-13 requirements.
6.How does Aetrix verify that AL9910AS-13 is sourced from the original manufacturer or authorized distributors?
All AL9910AS-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 AL9910AS-13 meets industry standards.
7.What is the process for return or replacement of AL9910AS-13?
All AL9910AS-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL9910AS-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 AL9910AS-13 part is unused and in its original packaging.
Return procedure for AL9910AS-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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