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Diodes Incorporated AL1677-05BS-13
- Part No.:
- AL1677-05BS-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AL1677-05BS-13.pdf
- Description:
- IC LED DRIVER OFFL NO 500MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,842
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Product details
Overview
AL1677-05BS-13 from Diodes Incorporated is a universal AC-input (85–277 VAC) buck LED driver IC with integrated 0.5 A/500 V MOSFET, delivering ±3% current accuracy, 90% efficiency, and boundary conduction mode (BCM) operation for EMI reduction in retrofit GU10/bulb LED lamps.
For engineers reviewing the AL1677-05BS-13 datasheet, AL1677-05BS-13 pinout, AL1677-05BS-13 application, or AL1677-05BS-13 equivalent, key selection criteria include integrated MOSFET rating, BCM control architecture, thermal fold-back threshold, UVLO/OTP/LED open/short protection coverage, and SO-8 package compatibility with high-voltage LED driver layouts.
Technical Context
The AL1677-05BS-13 implements a self-oscillating boundary conduction mode (BCM) controller with valley-switching detection, eliminating need for auxiliary winding feedback. It integrates a 0.5 A/500 V power MOSFET and operates without external gate driver or high-voltage sense resistors.
Protection circuitry includes under-voltage lockout (UVLO) at 12.5 V turn-on / 8.5 V turn-off, over-temperature protection (OTP), and real-time LED short/open fault detection via CS pin voltage monitoring with cycle-by-cycle current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–277 VAC universal line input enables single-BOM global deployment across North America, EU, and APAC markets. |
| Output Current Accuracy | ±3% over line, load, and temperature ensures consistent lumen output across lamp lifetime and ambient conditions. |
| Integrated MOSFET | 0.5 A/500 V rated device supports ≤5 W LED loads without external switch, reducing BOM count and PCB footprint. |
| Efficiency | 90% typical at full load minimizes thermal stress in enclosed retrofit lamp housings. |
| Operating Temperature | −40 °C to +105 °C junction range allows use in thermally constrained GU10 and A19 bulb designs. |
| Topology | Buck converter with BCM control reduces EMI filter component count and simplifies EMC certification. |
Pinout & Package
AL1677-05BS-13 is housed in an SO-8 package with exposed thermal pad (EP) for enhanced heat dissipation in high-density LED driver layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Power and signal reference ground | Common return path for internal MOSFET source, CS comparator, and UVLO circuitry. |
| VCC | Internal LDO input and bias supply | Accepts 12–20 V DC; powers internal logic and gate driver; requires local 10 µF decoupling. |
| CS | Current sense input | Monitors LED current via external sense resistor; triggers cycle-by-cycle limiting and fault detection. |
| OUT | Integrated MOSFET drain connection | High-side switching node tied directly to inductor; rated for 500 V repetitive peak voltage. |
| NC | No-connect terminal | Internally unconnected; must remain floating per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.5 A/500 V MOSFET | Eliminates external high-voltage switch and gate driver, reducing component count by ≥3 and enabling <5 W compact drivers. |
| Boundary Conduction Mode (BCM) | Enables zero-current switching at valley point, lowering switching losses and easing EMI filter design for Class B compliance. |
| Thermal Fold-back | Reduces output current linearly above 125 °C junction temperature to prevent thermal runaway in sealed lamp enclosures. |
| Comprehensive Protection Suite | Includes UVLO, OTP, LED open/short detection, and cycle-by-cycle current limit - no external fault logic required. |
Applications
| Retrofit LED Bulbs (GU10/A19) | High-Voltage DC-DC LED Drivers |
|---|---|
Use Scenario: Replacing incandescent bulbs in residential downlights and ceiling fixtures with AC mains-connected LED modules. IC Role / Device Role / Timing Role: Primary constant-current buck controller with integrated power switch and protection. Use Value: Enables single-stage AC-to-CC conversion with <5 W output, eliminating transformer and secondary-side feedback components. | Use Scenario: Powering LED arrays in industrial signage and architectural lighting powered from 277 VAC building circuits. IC Role / Device Role / Timing Role: High-voltage buck regulator maintaining stable current despite wide input variation (85–277 VAC). Use Value: Delivers ±3% current regulation across full input range, ensuring uniform brightness without manual calibration. |
| General-Purpose Constant Current Sources | Low-BOM LED Modules for Smart Lighting |
Use Scenario: Driving multiple parallel LED strings in commercial troffer and panel lights using minimal external components. IC Role / Device Role / Timing Role: Standalone CC source with built-in fault handling and thermal derating. Use Value: Supports up to 80 V output with 100 mA output, allowing flexible string configuration without current-sharing resistors. | Use Scenario: Enabling compact, low-cost LED modules for IoT-connected luminaires requiring long-life, maintenance-free operation. IC Role / Device Role / Timing Role: Integrated driver IC providing regulated current, thermal management, and fault reporting via CS pin voltage signature. Use Value: Reduces bill-of-materials to only inductor, sense resistor, diode, and bulk capacitor - ideal for space-constrained smart fixture PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL1677-08BS-13 | Integrates 0.8 A/500 V MOSFET; supports up to 120 mA output current. | Suitable for 6–8 W retrofit lamps; requires higher-current inductor and sense resistor. | Select when higher output power is needed without changing topology or layout footprint. |
| AP1685 | SO-7 package; integrates 0.5 A/500 V MOSFET but lacks thermal fold-back and has fixed UVLO thresholds. | Targeted for sub-10 W non-thermally demanding applications; no active thermal derating. | Choose only if thermal margin exceeds 25 °C and simplified protection suffices. |
Compared with AL1677-08BS-13 and AP1685, the AL1677-05BS-13 offers optimal balance of thermal fold-back responsiveness, SO-8 thermal pad capability, and precise ±3% current regulation for thermally constrained ≤5 W LED lamps - making it uniquely suited for GU10 and enclosed A19 form factors.
Availability
AL1677-05BS-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 AL1677-05BS-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 delivers highly integrated, cost-optimized AC-DC LED drivers targeting retrofit lamp manufacturers needing compact, certified, and reliable constant-current solutions for universal input voltage ranges.
FAQ
What protection features does AL1677-05BS-13 provide?
The AL1677-05BS-13 integrates under-voltage lockout (UVLO), over-temperature protection (OTP), LED open-circuit detection, LED short-circuit detection, and cycle-by-cycle current limiting. All protections trigger automatic shutdown or fold-back without external components, and thermal fold-back actively reduces output current above 125 °C junction temperature to sustain operation in enclosed fixtures.
Can AL1677-05BS-13 drive multiple LED strings in parallel?
Yes - the AL1677-05BS-13 regulates total output current, so parallel LED strings can be driven if forward voltage matching is maintained within ±5%. However, due to lack of individual string current sensing, mismatched VF may cause uneven brightness; external balancing resistors or matched-bin LEDs are recommended for critical uniformity.
What is the minimum number of external components required for basic operation?
A functional AL1677-05BS-13 circuit requires only five components: input bridge rectifier (DB1), bulk capacitor (C1), inductor (L1), output rectifier diode (D1), and current sense resistor (RCS). No auxiliary winding, optocoupler, or external MOSFET is needed - enabling one of the lowest BOM counts among integrated LED drivers.
Is AL1677-05BS-13 compatible with leading-edge TRIAC dimmers?
No - the AL1677-05BS-13 is not designed for phase-cut dimming. It lacks dimming interface circuitry, adjustable reference, or PWM input. Its datasheet explicitly states "Triac Dimmable: N" in the ordering table; for dimmable applications, Diodes recommends the AP1684A or AL1678 series with dedicated dimming control inputs.
AL1677-05BS-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:
- 500mA
- Frequency:
- -
- Dimming:
- No
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
AL1677-05BS-13 FAQ
1.How can I place an order for AL1677-05BS-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL1677-05BS-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 AL1677-05BS-13 reliable?
The price and inventory of AL1677-05BS-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL1677-05BS-13 is usually 5 days.
3.What payment methods are accepted for AL1677-05BS-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL1677-05BS-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL1677-05BS-13?
AL1677-05BS-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL1677-05BS-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 AL1677-05BS-13?
For technical support, including AL1677-05BS-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL1677-05BS-13 requirements.
6.How does Aetrix verify that AL1677-05BS-13 is sourced from the original manufacturer or authorized distributors?
All AL1677-05BS-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 AL1677-05BS-13 meets industry standards.
7.What is the process for return or replacement of AL1677-05BS-13?
All AL1677-05BS-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL1677-05BS-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 AL1677-05BS-13 part is unused and in its original packaging.
Return procedure for AL1677-05BS-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AL1677-05BS-13 Tags
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