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Diodes Incorporated AL9902S16-13
- Part No.:
- AL9902S16-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AL9902S16-13.pdf
- Description:
- IC LED DRVR OFFL PWM 400MA 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
AL9902S16-13 from Diodes Incorporated is a high-voltage linear/PWM dimmable LED driver IC with integrated 650V/2A MOSFET, operating from rectified 85–277VAC inputs (20–500VDC), delivering constant current up to 1.6A with ±5% current sense tolerance and 7.5V regulated VDD output - used in offline LED lamps and signage lighting.
For engineers reviewing the AL9902S16-13 datasheet, AL9902S16-13 pinout, AL9902S16-13 application, or AL9902S16-13 equivalent, key selection criteria include internal MOSFET voltage rating (650V), switching frequency programmability (20–300kHz via ROSC), dual dimming support (LD analog + PWM pins), thermal shutdown threshold (141°C), and SO-16 package thermal resistance (100°C/W).
Technical Context
The AL9902S16-13 implements a fixed-frequency buck topology with internal 650V MOSFET and integrated 7.5V LDO regulator, eliminating external start-up resistors. Its current-mode control uses a 250mV CS threshold with ±5% tolerance over –40°C to +125°C ambient.
Dimming is implemented via two independent paths: LD pin accepts 0–250mV analog input to adjust current limit threshold, while PWM pin accepts 0–100% duty cycle signals up to several kHz for digital brightness control - both functions coexist without conflict.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 20–500VDC (supports universal 85–277VAC rectified input) |
| Internal MOSFET Rating | 650V VDSS, 1.6A continuous drain current at TC = 25°C |
| Current Sense Threshold | 250mV ±5% - sets LED current accuracy and ripple sensitivity |
| VDD Output | 7.5V nominal, supplies up to 1mA for external circuitry |
| Switching Frequency | 20–300kHz, set by external ROSC resistor (e.g., 226kΩ → 100kHz) |
| Thermal Shutdown | 141°C junction temperature, with 25°C hysteresis for stable recovery |
| Efficiency | >90% typical in 180mA LED driver configuration across input range |
Pinout & Package
AL9902S16-13 is supplied in SO-16 package (10.3mm × 7.5mm × 2.35mm), thermally enhanced with exposed substrate pad (EP2) tied to GND and drain-connected EP1 under SW pin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 10, 13, 16 | No Connection | Unused pins - must be left floating or grounded per layout guidelines |
| 3 | PWM Input | Low-frequency PWM dimming enable; internal 200kΩ pull-down to GND |
| 5 | LD Input | Analog linear dimming control: 0–250mV adjusts current limit threshold |
| 6 | ROSC | Oscillator frequency setting: resistor to GND determines fOSC (20–300kHz) |
| 7 | VIN | Main high-voltage DC input (20–500V); powers internal LDO and MOSFET |
| 8 | CS | Current sense input: monitors voltage across external RSENSE |
| 9 | GND | Power and signal reference ground; connects to EP2 substrate pad |
| 11 | SO | MOSFET source terminal - returned to GND in buck configuration |
| 12 | SW | MOSFET drain output - connects to inductor in buck/boost topologies |
| 14 | NC | No connection - electrically isolated from die |
| 15 | SO | Second source terminal - paralleled with Pin 11 for lower RDS(on) path |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 650V MOSFET | Enables direct connection to rectified AC line without external HV switch |
| 7.5V regulated VDD | Eliminates high-power start-up resistor; powers gate driver and external bias |
| Dual dimming interface | Simultaneous LD (analog) and PWM (digital) control with independent thresholds |
| Tighter current sense tolerance | ±5% over full temperature range improves LED brightness consistency |
| Thermal shutdown with hysteresis | 141°C trip point + 25°C hysteresis prevents thermal cycling in enclosed fixtures |
Applications
| LED Offline Lamps | Signage and Decorative Lighting |
|---|---|
|
Use Scenario: Direct AC-line-powered LED retrofit lamps for residential/commercial sockets (E26/E27). IC Role / Device Role / Timing Role: Constant-current buck controller with integrated HV MOSFET and dual-dimming interface. Use Value: Eliminates external HV switch and start-up resistor, reducing BOM count and improving reliability in compact lamp housings. |
Use Scenario: Architectural LED strips and channel letters requiring smooth dimming and wide input voltage range. IC Role / Device Role / Timing Role: High-efficiency current regulator supporting both analog (0–10V) and PWM dimming protocols. Use Value: ±5% current tolerance ensures uniform brightness across long LED strings; SO-16 package enables standard SMT assembly. |
| Back Lighting of Flat Panel Displays | High Voltage DC-DC LED Driver |
|
Use Scenario: Edge-lit LCD TV or monitor backlights powered from 48V or 100–375VDC industrial supplies. IC Role / Device Role / Timing Role: Fixed-frequency buck controller regulating string current with low EMI via programmable fOSC. Use Value: 300kHz max switching frequency allows smaller magnetics; 7.5V VDD powers local logic and level-shifters. |
Use Scenario: Industrial LED drivers converting 277VDC (e.g., PoE++ or DC microgrid) to constant current for high-bay fixtures. IC Role / Device Role / Timing Role: High-voltage buck converter with thermal protection and programmable frequency for EMI compliance. Use Value: 650V MOSFET withstands transients on unregulated DC buses; SO-16 thermal resistance supports convection-cooled designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL9902U12-13 | Same die in U-DFN6040-12 package; θJA = 65°C/W vs. SO-16's 100°C/W | Better thermal performance in space-constrained PCBs; requires DFN reflow profile | Select for higher power density or lower junction temperature in sealed enclosures |
| AL9910A | Higher VDSS (700V), no integrated MOSFET - external FET required | Supports >277VAC systems (e.g., 347VAC street lighting); adds design flexibility but increases component count | Select when input transients exceed 650V or when discrete FET optimization is needed |
Compared with AL9902S16-13, AL9902U12-13 offers superior thermal dissipation in compact layouts, while AL9910A trades integration for higher voltage headroom and external FET control - choice depends on thermal budget, board area, and system-level surge requirements.
Availability
AL9902S16-13 is available at Aetrix Electronics and suitable for LED offline lamps, signage lighting, and high-voltage DC-DC LED drivers requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.
Supply support for AL9902S16-13 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 for power management, signal integrity, and connectivity applications.
The AL9902 belongs to Diodes' high-voltage LED driver product line, designed specifically for cost-sensitive, non-isolated AC/DC LED lighting applications requiring integrated MOSFETs and dual dimming capability.
FAQ
What is the maximum allowable input voltage for AL9902S16-13?
The absolute maximum VIN rating is +520V relative to GND. The recommended operating range is 20–500VDC, covering universal rectified AC inputs from 85–277VAC. Exceeding 500VDC risks triggering internal overvoltage stress conditions, even if within absolute max limits.
Can AL9902S16-13 operate in boost topology?
Yes - the AL9902S16-13 supports boost configuration when LED string voltage exceeds input voltage, such as with 48V DC input driving 20+ HB LEDs. However, current regulation accuracy degrades versus buck mode; external op-amp feedback to the LD pin is recommended to restore precision.
How does the ROSC resistor affect switching frequency and efficiency?
A 226kΩ ROSC sets fOSC ≈ 100kHz, balancing EMI suppression and MOSFET switching loss. Lower ROSC values increase frequency (up to 300kHz), reducing inductor size but raising switching losses; higher values reduce losses but require larger magnetics and may impact dimming response.
Is thermal derating required for SO-16 package operation above 25°C ambient?
Yes - SO-16 has θJA = 100°C/W. At 105°C max ambient, junction temperature rise from 1.6A operation (RDS(on) ≈ 4.5Ω) exceeds safe limits without heatsinking. Derate power dissipation by 10mW/°C above 25°C ambient, or use copper pour and thermal vias to reduce effective θJA.
AL9902S16-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-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):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 20V
- Voltage - Supply (Max):
- 500V
- Voltage - Output:
- -
- Current - Output / Channel:
- 400mA
- Frequency:
- 300kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Lighting, Signage
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
AL9902S16-13 FAQ
1.How can I place an order for AL9902S16-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL9902S16-13 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 AL9902S16-13 reliable?
The price and inventory of AL9902S16-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL9902S16-13 is usually 5 days.
3.What payment methods are accepted for AL9902S16-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL9902S16-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL9902S16-13?
AL9902S16-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL9902S16-13 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 AL9902S16-13?
For technical support, including AL9902S16-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL9902S16-13 requirements.
6.How does Aetrix verify that AL9902S16-13 is sourced from the original manufacturer or authorized distributors?
All AL9902S16-13 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 AL9902S16-13 meets industry standards.
7.What is the process for return or replacement of AL9902S16-13?
All AL9902S16-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL9902S16-13, 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 AL9902S16-13 part is unused and in its original packaging.
Return procedure for AL9902S16-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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