My Inquiry
My Account
Diodes Incorporated AL1676-40DS7-13
- Part No.:
- AL1676-40DS7-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Datasheet:
-
AL1676-40DS7-13.pdf
- Description:
- IC LED DRIVER OFFL 4A 7SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,768
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AL1676-40DS7-13 from Diodes Incorporated is a universal AC-input (85–277 VAC), high-power-factor (PF >0.9), boundary-conduction-mode (BCM) Buck LED driver IC with integrated 650 V / 4.0 A high-voltage MOSFET, ±3% output current tolerance, and thermal foldback protection. It delivers up to 18 W in retrofit LED lamps using a single-winding inductor and SO-7 package.
For engineers reviewing the AL1676-40DS7-13 datasheet, AL1676-40DS7-13 pinout, AL1676-40DS7-13 application, or AL1676-40DS7-13 equivalent, this device supports constant-current LED driving with line/load regulation, EMI-friendly BCM operation, and comprehensive fault protection including UVLO, OCP, OVP/OSP, OTP, and thermal foldback.
Technical Context
The AL1676-40DS7-13 implements constant-on-time (COT) control to achieve high power factor (>0.9) without auxiliary windings, using source-driver topology for low operating current (170 µA at 5 kHz). Its tOFF detection eliminates need for auxiliary winding, reducing BOM count.
It operates in boundary conduction mode (BCM) with programmable tON (550 ns–29 µs) and tOFF (6–180 µs) windows, enabling stable CC regulation across wide input voltage (85–277 VAC) and load ranges while easing EMI compliance. Internal 0.400 V reference and 0.5 V ROVP threshold enable precise current and open-voltage setting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–277 VAC universal; enables single-design compatibility across global mains voltages. |
| Integrated MOSFET | 650 V / 4.0 A drain-source rating; supports up to 18 W output with reduced external component count. |
| Output Current Accuracy | ±3% tolerance; ensures consistent LED brightness and lifetime across production units. |
| Power Factor | >0.9 at full load; meets EN61000-3-2 Class C harmonic limits for lighting equipment. |
| Thermal Foldback Threshold | +150 °C typical junction temperature; linearly reduces output current to prevent thermal runaway. |
| Startup Current | 100 µA; minimizes energy loss during initial charge of VCC capacitor from high-voltage rail. |
| Operating Current | 170 µA at 5 kHz switching; enables efficient operation with low standby losses. |
| VCC Clamp Voltage | 15.5 V typical; internal active Zener protects bias supply from overvoltage transients. |
Pinout & Package
AL1676-40DS7-13 is housed in a thermally enhanced SO-7 package (6.90 × 3.90 mm, 1.27 mm pitch), optimized for high-voltage LED driver PCB layouts with exposed pad thermal path (θJC = 19 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Bias supply input | Accepts startup current from HV resistors; clamped at 15.5 V to protect internal circuitry. |
| 2 ROVP | Open-voltage sense reference | Connects to resistor divider setting output overvoltage threshold (0.5 V internal reference). |
| 3 COMP | Error amplifier compensation node | External RC network stabilizes current control loop for robust line/load regulation. |
| 4 GND | Power and signal ground | Common return for CS sensing, gate drive, and internal logic; requires low-impedance layout. |
| 5 CS | Current sense input | Samples MOSFET source current via R5; triggers cycle-by-cycle OCP when ≥0.8 V. |
| 6 NC | No connection | Unbonded pin; must remain floating-no routing or soldering permitted. |
| 7 D | Drain of internal HV MOSFET | High-side switch node connected directly to inductor; rated 650 V / 4.0 A continuous. |
Key Features
| Feature | Design Value |
|---|---|
| Single-winding inductor support | Eliminates auxiliary winding requirement, reducing transformer cost and board space by ~30%. |
| Boundary conduction mode (BCM) | Enables natural zero-current switching, lowering EMI emissions and simplifying filter design. |
| Thermal foldback + OTP latch | Gradually reduces output current above +150 °C; shuts down permanently at +170 °C for safety. |
| Integrated protections | UVLO, LEB, cycle-by-cycle OCP, OVP/OSP, and OTP-all implemented on-die with no external components. |
| Low quiescent current | 100 µA startup / 170 µA operating current enables efficient operation even at light loads. |
Applications
| Retrofit LED Lamps | LED Tube Lighting |
|---|---|
|
Use Scenario: Replacement of T8/T5 fluorescent tubes with integrated LED drivers in commercial office lighting. IC Role / Device Role / Timing Role: Constant-current Buck controller managing 42 V / 150 mA output with universal AC input and thermal derating. Use Value: Enables compact, fanless 18 W LED tube design meeting IEC 62384 and EN61000-3-2 Class C requirements. |
Use Scenario: High-efficiency LED tube modules for industrial warehouse lighting with 277 VAC line voltage. IC Role / Device Role / Timing Role: Primary LED current regulator operating in BCM with automatic tOFF detection and no auxiliary winding. Use Value: Reduces BOM count by eliminating auxiliary winding and discrete HV MOSFET, cutting total solution cost by ~12%. |
| High-Voltage DC-DC LED Driver | General-Purpose Constant Current Source |
|
Use Scenario: Off-line LED driver stage in smart streetlight systems requiring 650 V MOSFET ruggedness and thermal foldback. IC Role / Device Role / Timing Role: High-side switch controller with integrated 650 V / 4.0 A MOSFET and programmable OVP threshold. Use Value: Supports direct connection to 277 VAC mains without external HV buffer, improving system reliability and MTBF. |
Use Scenario: Industrial indicator lighting and signage where precise, stable current is required across varying ambient temperatures. IC Role / Device Role / Timing Role: Closed-loop CC regulator with ±3% accuracy and thermal foldback maintaining current stability from −40 °C to +105 °C. Use Value: Delivers consistent LED luminance without external trimming or calibration, reducing manufacturing test time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-power-factor Buck LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL1676-20CS7-13 | 600 V / 2.0 A MOSFET; lower voltage/current rating; identical SO-7 package and pinout. | Rated for ≤10 W output; suitable for lower-power LED tubes or lamps where 650 V margin is unnecessary. | Select when system peak voltage stays below 600 V and thermal budget allows smaller MOSFET die size. |
| AL1676-20BS7-13 | 500 V / 2.0 A MOSFET; reduced voltage rating; same control architecture and protection set. | Targeted for 85–265 VAC only; not rated for 277 VAC sustained operation or surge conditions. | Choose for cost-sensitive 230 VAC-only designs where 500 V rating provides sufficient margin. |
Compared with AL1676-20BS7-13 and AL1676-20CS7-13, the AL1676-40DS7-13 offers higher power capability (18 W vs. ≤10 W), greater voltage margin (650 V vs. 500/600 V), and extended thermal foldback range-making it optimal for 277 VAC industrial LED drivers requiring robustness and scalability.
Availability
AL1676-40DS7-13 is available at Aetrix Electronics and suitable for retrofit LED lamps, LED tube lighting, and high-voltage DC-DC LED drivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AL1676-40DS7-13 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 power management, signal integrity, and LED lighting solutions with ISO/TS 16949-certified operations.
The AL1676 product line targets cost-sensitive, high-reliability AC-DC LED drivers for retrofit and tube applications, emphasizing integration, thermal resilience, and regulatory compliance without external HV switches.
FAQ
What is the maximum continuous output power supported by AL1676-40DS7-13?
The AL1676-40DS7-13 supports up to 18 W output power, validated under 85–277 VAC input with appropriate heatsinking and SO-7 PCB layout per Diodes' recommended pad dimensions (6.90 × 3.90 mm, 2 oz copper). This rating assumes 4.0 A MOSFET current limit, 650 V blocking capability, and thermal foldback activation at +150 °C junction temperature.
How does the AL1676-40DS7-13 achieve high power factor without an auxiliary winding?
It uses source-driver topology and novel tOFF detection that samples voltage across the internal MOSFET's drain-to-source path-eliminating need for auxiliary winding. Combined with constant-on-time (COT) control, this enables >0.9 PF across 85–277 VAC while maintaining BCM operation and tight current regulation.
Can AL1676-40DS7-13 be used in 277 VAC industrial lighting without derating?
Yes-the integrated 650 V MOSFET provides 135 V margin above 277 VAC peak (392 V), satisfying IEC 61347-2-13 surge requirements. Diodes' datasheet confirms operation up to 277 VAC RMS with thermal foldback active above +150 °C, making it suitable for enclosed high-ambient fixtures without external derating.
What failure modes does the AL1676-40DS7-13 protect against, and how are they triggered?
It provides under-voltage lockout (UVLO <8.5 V), cycle-by-cycle overcurrent (OCP at 0.8 V on CS pin), output open/short protection (OVP/OSP via ROVP and tOFF monitoring), thermal foldback (+150 °C), and latched overtemperature shutdown (+170 °C). All protections are fully integrated with no external components required.
AL1676-40DS7-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 18V
- Voltage - Output:
- 650V
- Current - Output / Channel:
- 4A
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 7-SO
AL1676-40DS7-13 FAQ
1.How can I place an order for AL1676-40DS7-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL1676-40DS7-13 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 AL1676-40DS7-13 reliable?
The price and inventory of AL1676-40DS7-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL1676-40DS7-13 is usually 5 days.
3.What payment methods are accepted for AL1676-40DS7-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL1676-40DS7-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL1676-40DS7-13?
AL1676-40DS7-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL1676-40DS7-13 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 AL1676-40DS7-13?
For technical support, including AL1676-40DS7-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL1676-40DS7-13 requirements.
6.How does Aetrix verify that AL1676-40DS7-13 is sourced from the original manufacturer or authorized distributors?
All AL1676-40DS7-13 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 AL1676-40DS7-13 meets industry standards.
7.What is the process for return or replacement of AL1676-40DS7-13?
All AL1676-40DS7-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL1676-40DS7-13, 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 AL1676-40DS7-13 part is unused and in its original packaging.
Return procedure for AL1676-40DS7-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AL1676-40DS7-13 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
