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Diodes Incorporated AL9910S-13
- Part No.:
- AL9910S-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AL9910S-13.pdf
- Description:
- IC LED DRIVER OFFL PWM 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,192
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Product details
Overview
AL9910S-13 from Diodes Incorporated is a universal high-voltage PWM LED driver-controller designed for offline AC-powered LED lamps. It drives external MOSFETs up to 300kHz, regulates constant LED current via a single sense resistor (typical VCS(HI) = 250 mV), withstands 500VIN, and supports both linear (LD pin) and PWM (PWM_D pin) dimming. It targets 85–277VAC rectified input applications such as commercial LED retrofit lamps.
For engineers reviewing the AL9910S-13 datasheet, AL9910S-13 pinout, AL9910S-13 application, or AL9910S-13 equivalent, this device requires attention to gate drive voltage (7.5V nominal), current-sense threshold tolerance (±6% for AL9910S variant), thermal derating in SO-8EP package, and ROSC-resistor-based frequency programming - all critical for stable high-voltage buck LED driver design.
Technical Context
The AL9910S-13 implements a peak-current-mode-controlled buck topology with internal 7.5V LDO regulation (AL9910 series), enabling direct high-side gate drive without external bias supplies. Its UVLO (6.7V typ, 500mV hysteresis) ensures reliable startup across wide-input rectified AC rails.
It features dual dimming control: LD pin accepts 45–250mV analog signals to scale current-sense threshold linearly, while PWM_D pin enables full-cycle enable/disable with 0–100% duty cycle support up to several kHz. The device enters constant-off-time (PFM) mode when ROSC is connected to GATE instead of GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 15 V to 500 V DC - supports universal rectified AC inputs (85–277VAC) without auxiliary winding. |
| Current-Sense Threshold | 249–281 mV - ±6% tolerance (AL9910S-6 grade); sets LED string current via RSENSE = 0.25V / ILED. |
| Gate Drive Voltage | 7.5 V nominal - sufficient to fully enhance standard logic-level N-channel MOSFETs in high-side buck configuration. |
| Switching Frequency Range | 20–300 kHz - set by ROSC resistor (e.g., 226 kΩ → 100 kHz); adjustable for EMI optimization or efficiency tuning. |
| Thermal Protection | Junction shutdown at +150°C with +50°C hysteresis - prevents latch-up during overtemperature transients in enclosed luminaires. |
| Dimming Interface | LD pin: 45–250 mV analog control; PWM_D pin: TTL-compatible enable with internal 200 kΩ pulldown - supports hybrid dimming schemes. |
| Package Thermal Resistance | θJA = 66°C/W (SO-8EP) - enables 2.2 W continuous power dissipation at +85°C ambient, critical for compact LED drivers. |
Pinout & Package
AL9910S-13 is housed in a thermally enhanced SO-8EP (Exposed Pad) package. The exposed pad must be soldered directly to PCB ground plane for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | High-voltage input rail | Accepts up to 500 V DC; powers internal LDO and provides energy storage during AC zero-crossings. |
| CS (Pin 2) | Current-sense comparator input | Monitors voltage across external RSENSE; triggers MOSFET turn-off when threshold (249–281 mV) is exceeded. |
| GND (Pin 3) | Power and signal reference | Common return for CS, PWM_D, LD, ROSC, and exposed pad; must be low-impedance for stable current regulation. |
| GATE (Pin 4) | External MOSFET gate driver output | 7.5 V push-pull output with 30 ns rise/fall time; drives gate capacitance up to 500 pF directly. |
| PWM_D (Pin 5) | Enable/dimming control input | Active-high TTL input; internal 200 kΩ pulldown ensures safe default OFF state during power-up or open-circuit faults. |
| VDD (Pin 6) | Internally regulated supply | 7.5 V LDO output; powers internal circuitry and can source ≤1 mA for auxiliary bias (e.g., optocoupler). |
| LD (Pin 7) | Linear dimming control | Analog input scaling current-sense threshold from 45 mV to 250 mV; enables soft-start via RC ramp. |
| ROSC (Pin 8) | Oscillator timing control | Resistor-to-GND sets switching frequency; reconfigurable to GATE for constant-off-time (PFM) operation. |
| EP (Pad) | Thermal and electrical ground | Must be connected to solid GND copper pour with ≥6 thermal vias; reduces θJA by 44°C/W vs. standard SO-8. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 7.5 V LDO | Eliminates startup resistor and auxiliary winding; draws only 0.5 mA quiescent current from high-voltage rail. |
| Programmable switching frequency | 20–300 kHz via single ROSC resistor - enables EMI spread-spectrum tuning and efficiency optimization per LED string count. |
| Two-dimension dimming | Simultaneous LD (analog) and PWM_D (digital) control allows fine-grained brightness adjustment without flicker or color shift. |
| Robust fault protection | UVLO (6.7 V), OTP (+150°C), and inherent open-circuit detection via zero-switching behavior - no external protection IC needed. |
| SO-8EP thermal enhancement | 66°C/W θJA enables 2.2 W power handling at +85°C ambient - suitable for sealed outdoor LED fixtures without heatsinks. |
Applications
| Commercial LED Retrofit Lamps | Industrial High-Bay Lighting |
|---|---|
|
Use Scenario: Replacing 70W metal halide lamps in warehouse high-bay fixtures with 40W LED arrays powered directly from 277VAC line. IC Role / Device Role / Timing Role: Constant-current buck controller regulating 700mA through 36-series LEDs; ROSC set to 150kΩ for 120kHz switching to minimize audible noise. Use Value: Enables >90% efficiency and eliminates bulky transformer-based drivers - reducing fixture size and BOM cost by 35%. |
Use Scenario: Outdoor streetlight using 24V–48V DC input from solar-charged battery bank, driving 12–24 LED strings in parallel. IC Role / Device Role / Timing Role: Universal HV DC-DC LED driver operating in discontinuous conduction mode; LD pin used for daylight harvesting feedback. Use Value: Single-part solution handles 15–500V input range - avoids separate DC-DC converters and simplifies field replacement logistics. |
| Architectural Signage Lighting | Backlight for Industrial Displays |
|
Use Scenario: Edge-lit channel letters with RGB LED strips requiring smooth 0–100% dimming and consistent color point across temperature. IC Role / Device Role / Timing Role: Linear dimming via LD pin (0–250mV) combined with 200Hz PWM_D modulation to suppress low-frequency ripple. Use Value: Tight 6% current-sense tolerance maintains <±2% LED current variation - preserving uniform luminance across 50+ sign modules. |
Use Scenario: Ruggedized medical display backlight requiring ESD-hardened, thermally stable current regulation in confined space. IC Role / Device Role / Timing Role: Constant-current source for 10-series white LEDs; SO-8EP package mounted on 2oz copper with thermal vias to chassis ground. Use Value: 150°C junction shutdown and 66°C/W thermal resistance prevent thermal runaway in sealed enclosures - meeting IEC 60601-1 safety margins. |
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 | 10V gate drive (vs. 7.5V), tighter 5% current-sense tolerance, higher VIN(MIN) (20V vs. 15V) | Better suited for high-current MOSFETs requiring stronger gate drive; preferred in 277VAC-only systems with minimal low-line operation. | Select AL9910A-13 when driving >1A LED loads or when higher gate drive margin is required for reliability at elevated temperatures. |
| AL9910-13 | Same 7.5V gate drive and 6% tolerance as AL9910S-13, but offered in standard SO-8 (not SO-8EP) | Limited to 630 mW power dissipation (vs. 2200 mW in SO-8EP); requires larger heatsink or lower ambient for same output power. | Choose AL9910-13 only for cost-sensitive, low-power (<15W) indoor applications where thermal constraints allow standard SO-8 mounting. |
Compared with AL9910A-13, AL9910S-13 trades gate drive strength and tolerance for broader low-line compatibility and lower thermal impedance packaging - making it optimal for universal-input, thermally constrained LED lamp designs.
Availability
AL9910S-13 is available at Aetrix Electronics and suitable for commercial LED retrofit lamps, industrial high-bay lighting, and architectural signage requiring stable component supply across global manufacturing sites.
Supply support for AL9910S-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and lighting solutions for industrial and consumer markets.
The AL9910/A family is part of Diodes' LED Driver portfolio, engineered specifically for cost-effective, high-efficiency offline LED lighting - emphasizing universal AC input support, integrated protection, and thermal resilience in compact packages.
FAQ
What is the maximum recommended input voltage for AL9910S-13?
The absolute maximum VIN rating is +520 V, but the recommended operating range is 15 V to 500 V DC. Operation above 500 V risks permanent damage due to oxide breakdown in the internal LDO and gate driver. For 277VAC systems, peak rectified voltage reaches ~392 V, well within safe margin. Transient clamping (e.g., MOV) is advised for surge-prone installations.
Can AL9910S-13 operate in constant-off-time (PFM) mode?
Yes - connecting the ROSC pin to the GATE node (instead of GND) forces constant-off-time operation. In this mode, the oscillator period defines tOFF, not fOSC. This improves light-output stability at low duty cycles and reduces sub-harmonic oscillation in buck topologies where VIN > 2×VLED. The ROSC value is recalculated using tOFF = 1/fOSC × (1 − VLED/VIN).
How does linear dimming via the LD pin interact with current-sense threshold?
The LD pin directly scales the internal current-sense comparator reference from 45 mV to 250 mV. At 250 mV, full nominal current flows; at 45 mV, LED current drops to ~18% of nominal. This is not a simple voltage divider - it modifies the comparator's trip point, maintaining regulation accuracy across dimming range. Applying >250 mV has no effect; applying <45 mV disables dimming but does not shut down the driver.
Is AL9910S-13 RoHS-compliant and halogen-free?
Yes - AL9910S-13 is fully RoHS 3 compliant (2015/863/EU) with no intentionally added lead, and certified "Green" per Diodes' definition: Br < 900 ppm, Cl < 900 ppm (Br+Cl < 1500 ppm), Sb < 1000 ppm. The SO-8EP package uses matte tin lead finish and halogen-free molding compound, verified per JEDEC J-STD-70B and IPC-4101D.
AL9910S-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):
- 15V
- 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
AL9910S-13 FAQ
1.How can I place an order for AL9910S-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL9910S-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 AL9910S-13 reliable?
The price and inventory of AL9910S-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL9910S-13 is usually 5 days.
3.What payment methods are accepted for AL9910S-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL9910S-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL9910S-13?
AL9910S-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL9910S-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 AL9910S-13?
For technical support, including AL9910S-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL9910S-13 requirements.
6.How does Aetrix verify that AL9910S-13 is sourced from the original manufacturer or authorized distributors?
All AL9910S-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 AL9910S-13 meets industry standards.
7.What is the process for return or replacement of AL9910S-13?
All AL9910S-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL9910S-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 AL9910S-13 part is unused and in its original packaging.
Return procedure for AL9910S-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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