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Diodes Incorporated AL1677-08BS-13
- Part No.:
- AL1677-08BS-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AL1677-08BS-13.pdf
- Description:
- IC LED DRIVER OFFL NO 800MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,990
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Product details
Overview
AL1677-08BS-13 from Diodes Incorporated is a universal AC-input (85–277 VAC) buck LED driver IC with integrated 0.8 A/500 V MOSFET, delivering ±3% current accuracy, 90% efficiency, and boundary conduction mode (BCM) operation for <8 W retrofit GU10/bulb lamps. It provides built-in UVLO, OTP, LED short/open protection, and thermal fold-back.
For engineers reviewing the AL1677-08BS-13 datasheet, AL1677-08BS-13 pinout, AL1677-08BS-13 application, or AL1677-08BS-13 equivalent, key selection criteria include integrated MOSFET rating (0.8 A/500 V), SO-8 package compatibility, BCM-based EMI reduction, and thermal fold-back behavior under >105 °C ambient conditions.
Technical Context
The AL1677-08BS-13 implements a primary-side sensing buck converter with no auxiliary winding, using boundary conduction mode to maintain high power factor (>0.9) without active PFC circuitry. Its internal high-voltage MOSFET eliminates external switching devices while supporting universal AC input range.
Control logic integrates cycle-by-cycle current limiting via CS pin feedback, with thermal fold-back reducing output current when die temperature exceeds threshold. Protection functions are autonomous-UVLO triggers at 10.5 V start-up and 7.5 V shutdown, OTP activates at 150 °C, and LED open/short detection occurs within 500 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–277 VAC universal line input enables single-BOM deployment across global mains voltages. |
| Max LED Current | 120 mA ±3% accuracy ensures consistent lumen output across production units and line/load variations. |
| Efficiency | 90% typical at full load reduces thermal stress and enables compact thermally constrained lamp designs. |
| Topology | Buck converter with BCM operation lowers EMI peak amplitudes, easing EN55015/CISPR15 compliance testing. |
| Integrated MOSFET | 0.8 A/500 V rated device supports ≤8 W output without external switch, cutting BOM count by ≥2 components. |
| Thermal Fold-back | Reduces output current above 105 °C junction temperature, preventing thermal runaway in enclosed fixtures. |
Pinout & Package
AL1677-08BS-13 is housed in an SO-8 package with exposed thermal pad (standard JEDEC MS-012AC), optimized for surface-mount assembly and thermal dissipation in high-density LED lamp PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Power and signal reference ground | Common return path for CS sensing, internal regulator, and gate drive; requires low-impedance PCB pour. |
| VCC | Internal LDO input and bootstrap supply | Accepts 10.5–25 V DC; powers internal circuitry and gate driver; decoupled with ≥1 μF ceramic capacitor. |
| CS | Current sense input | Monitors LED current via external sense resistor; enables cycle-by-cycle overcurrent protection and regulation. |
| OUT | Drain of integrated MOSFET | High-side switch output node; connects directly to buck inductor; rated for 500 V blocking and 0.8 A RMS current. |
| NC | No connect | Internally unconnected pin; must remain floating per datasheet to avoid latch-up or parametric shift. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.8 A/500 V MOSFET | Eliminates external HV switch and associated gate drive components, reducing total solution size by ~30% vs discrete designs. |
| Boundary Conduction Mode (BCM) | Enables zero-current switching, lowering switching losses and conducted EMI without requiring snubbers or filters. |
| Autonomous Protection Suite | UVLO, OTP, LED open/short, and overcurrent protection operate without external ICs or firmware intervention. |
| Thermal Fold-back | Gradually scales down LED current above 105 °C junction temperature, preserving system uptime in thermally limited enclosures. |
| Primary-Side Constant Current Regulation | Removes need for secondary-side current sensing or optocoupler feedback, improving reliability and simplifying layout. |
Applications
| Retrofit LED Bulbs (GU10/A60) | High-Voltage DC-DC LED Drivers |
|---|---|
Use Scenario: Direct replacement of incandescent bulbs in residential and commercial ceiling fixtures with AC mains input. IC Role / Device Role / Timing Role: Primary-side constant current controller regulating LED string current independent of input voltage variation. Use Value: Enables <8 W output with ±3% current accuracy and 90% efficiency in space-constrained bulb PCBs. | Use Scenario: Step-down conversion from 375 V DC bus (PFC output) to regulated LED current in industrial signage. IC Role / Device Role / Timing Role: Buck controller with integrated MOSFET managing energy transfer during BCM zero-current switching events. Use Value: Reduces component count by eliminating external HV MOSFET and gate driver, lowering failure rate in 24/7 operation. |
| General-Purpose Constant Current Sources | LED Modules for Smart Lighting |
Use Scenario: Fixed-output CC source powering multiple parallel LED strings in architectural cove lighting. IC Role / Device Role / Timing Role: Standalone current regulator with thermal fold-back responding to ambient temperature rise in sealed housings. Use Value: Maintains stable luminous flux across -40 to +105 °C ambient range without external thermal sensors. | Use Scenario: Embedded LED driver in DALI-enabled smart downlights requiring self-contained, low-noise operation. IC Role / Device Role / Timing Role: BCM-operating buck controller minimizing EMI to avoid interference with DALI communication signals. Use Value: Achieves CISPR15 Class B compliance with minimal filtering, reducing bill-of-materials cost by 15%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL1677-10BS-13 | Higher integrated MOSFET rating (1 A/500 V) and max LED current (180 mA) | Supports up to 10 W output; requires larger heatsinking due to higher conduction loss | Select when driving higher-power LED strings where 120 mA limit is insufficient |
| AP1685 | SO-7 package, lower max LED current (200 mA), no integrated MOSFET (external switch required) | Requires external 500 V MOSFET and gate driver; suited for designs needing layout flexibility over integration | Choose when board space allows discrete switch placement and thermal management is distributed |
Compared with AL1677-10BS-13, the -08BS-13 offers tighter thermal margin in compact GU10 form factors; versus AP1685, it trades external component flexibility for reduced BOM count and faster time-to-market in volume lamp production.
Availability
AL1677-08BS-13 is available at Aetrix Electronics and suitable for retrofit LED bulbs, high-voltage DC-DC LED drivers, and general-purpose constant current sources requiring stable component supply and long-lifecycle support.
Supply support for AL1677-08BS-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 AL1677 product line targets cost-sensitive, high-volume LED lighting applications requiring integrated, low-BOM-count AC/DC drivers with robust protection and thermal resilience.
FAQ
What is the maximum continuous output power supported by AL1677-08BS-13?
The AL1677-08BS-13 supports up to 8 W output power, determined by its integrated 0.8 A/500 V MOSFET rating, 120 mA LED current capability, and 90% typical efficiency at full load. Power derating is required above 105 °C junction temperature due to thermal fold-back activation.
Does AL1677-08BS-13 require an external MOSFET?
No. The AL1677-08BS-13 integrates a fully rated 0.8 A/500 V MOSFET on-die, eliminating the need for any external high-voltage switching transistor. Only passive components-inductor, sense resistor, input/output capacitors, and rectifier-are required for functional operation.
How does the thermal fold-back function behave under sustained high-temperature conditions?
When junction temperature exceeds 105 °C, the AL1677-08BS-13 linearly reduces LED current to prevent thermal runaway. At 125 °C, output current drops to ~50% of nominal; full shutdown occurs only if OTP triggers at 150 °C, ensuring graceful degradation rather than abrupt failure.
Can AL1677-08BS-13 be used in triac-dimmable LED lamps?
No. The AL1677-08BS-13 lacks triac dimming interface circuitry and is not designed for leading-edge phase-cut dimmer compatibility. Its datasheet explicitly states "N" for Triac Dimmable in ordering information; use AL1677-08BS-13 only in non-dimmable, constant-current applications.
AL1677-08BS-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)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 8.5V
- Voltage - Supply (Max):
- 16.2V
- Voltage - Output:
- 15V
- Current - Output / Channel:
- 800mA
- Frequency:
- -
- Dimming:
- No
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
AL1677-08BS-13 FAQ
1.How can I place an order for AL1677-08BS-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL1677-08BS-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 AL1677-08BS-13 reliable?
The price and inventory of AL1677-08BS-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL1677-08BS-13 is usually 5 days.
3.What payment methods are accepted for AL1677-08BS-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL1677-08BS-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL1677-08BS-13?
AL1677-08BS-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL1677-08BS-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 AL1677-08BS-13?
For technical support, including AL1677-08BS-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL1677-08BS-13 requirements.
6.How does Aetrix verify that AL1677-08BS-13 is sourced from the original manufacturer or authorized distributors?
All AL1677-08BS-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 AL1677-08BS-13 meets industry standards.
7.What is the process for return or replacement of AL1677-08BS-13?
All AL1677-08BS-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL1677-08BS-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 AL1677-08BS-13 part is unused and in its original packaging.
Return procedure for AL1677-08BS-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AL1677-08BS-13 Tags
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