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Diodes Incorporated AL1676-20AS7-13
- Part No.:
- AL1676-20AS7-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Datasheet:
-
AL1676-20AS7-13.pdf
- Description:
- IC LED DRIVER OFFL 2A 7SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,916
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Product details
Overview
AL1676-20AS7-13 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 300 V/2.0 A high-voltage MOSFET, ±3% output current tolerance, and thermal foldback protection. It delivers constant-current regulation for retrofit LED lamps and tubes using a single-winding inductor and minimal external components.
For engineers reviewing the AL1676-20AS7-13 datasheet, AL1676-20AS7-13 pinout, AL1676-20AS7-13 application, or AL1676-20AS7-13 equivalent, this device supports design of compact, low-BOM-cost, EMI-friendly LED drivers requiring stable CC output, wide input range, and comprehensive fault protection including UVLO, OCP, OVP/OSP, OTP, and thermal foldback.
Technical Context
The AL1676-20AS7-13 implements constant-on-time (COT) control to achieve high power factor (>0.9) without auxiliary windings, while its source-driver architecture reduces operating current to 170 µA at 5 kHz switching. Its tOFF detection eliminates need for an auxiliary winding, simplifying transformer design.
It operates in boundary conduction mode (BCM) with programmable tON (550 ns–29 µs) and tOFF (6–180 µs) windows, enabling precise peak-current sensing via the CS pin and accurate output current regulation via internal 0.400 V reference and ROVP pin (0.5 V reference). The integrated 300 V/2.0 A MOSFET supports up to 10 W output in SO-7 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–277 VAC universal AC input - enables single-design compatibility across global mains voltages. |
| Output Current Accuracy | ±3% tolerance - ensures consistent LED brightness and lifetime across line/load variations. |
| Integrated MOSFET | 300 V / 2.0 A drain-source rating - supports ≤10 W LED loads with no external HV switch required. |
| Startup & Operating Current | 100 µA startup / 170 µA operating (5 kHz) - minimizes no-load losses and improves efficiency at light load. |
| Thermal Protection | +150 °C thermal foldback onset / +170 °C latched shutdown - prevents thermal runaway and enables safe derating. |
| Power Factor | >0.9 at full load - meets IEC 61000-3-2 Class C harmonic limits for lighting equipment. |
| Efficiency | >90% typical - reduces heat generation and enables compact thermal design in enclosed lamp housings. |
Pinout & Package
AL1676-20AS7-13 is housed in a thermally enhanced SO-7 package (7-pin, gull-wing, 2.54 mm pitch), optimized for high-voltage isolation and PCB-level heat dissipation with θJC = 19 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | IC power supply input | Accepts 8.5–14.5 V DC; clamped internally at 15.5 V; powers internal circuitry after startup. |
| 2 ROVP | Output overvoltage setpoint | Connects to voltage divider from LED string; sets open-circuit protection threshold via 0.5 V internal reference. |
| 3 COMP | Error amplifier compensation node | External RC network stabilizes current regulation loop; critical for transient response and stability. |
| 4 GND | Signal and power ground reference | Common return path for CS, ROVP, COMP, and internal bias; must be low-impedance for noise immunity. |
| 5 CS | Current sense input | Senses voltage across R5 to detect peak inductor current; triggers cycle-by-cycle OCP when ≥0.8 V. |
| 6 NC | No connection | Unbonded pin; must remain unconnected per datasheet to avoid malfunction or latch-up. |
| 7 D | Drain of internal HV MOSFET | High-side switch node connected directly to inductor and rectified AC input; rated 300 V / 2.0 A. |
Key Features
| Feature | Design Value |
|---|---|
| Single-winding inductor support | Eliminates auxiliary winding requirement, reducing transformer complexity, cost, and EMI emissions. |
| Boundary conduction mode (BCM) | Enables natural zero-current switching, easing EMI filter design and meeting EN 55015/CISPR 15 standards. |
| Tight current tolerance (±3%) | Ensures consistent LED luminous flux across production units and temperature ranges without trimming. |
| Thermal foldback with linear derating | Reduces output current proportionally above +150 °C junction, maintaining safe operation without abrupt shutdown. |
| Comprehensive fault protection suite | Includes UVLO, LEB, cycle-by-cycle OCP, OVP/OSP, OTP, and thermal foldback - enables robust field reliability. |
Applications
| Retrofit LED Lamps | LED Tube Lighting |
|---|---|
|
Use Scenario: Replacement of T8/T5 fluorescent tubes with integrated LED drivers in commercial office fixtures. IC Role / Device Role / Timing Role: Constant-current Buck controller managing 42 V / 150 mA output with universal AC input and thermal foldback. Use Value: Enables direct AC-line replacement without ballast removal; SO-7 footprint fits tight lamp-end cavities. |
Use Scenario: High-efficiency LED tube modules for industrial warehouse lighting operating on 230 VAC mains. IC Role / Device Role / Timing Role: BCM-based current regulator delivering 60 V / 100 mA with >90% efficiency and <10% THD. Use Value: Meets IEC 61000-3-2 Class C harmonics; thermal foldback sustains output at 60 °C ambient. |
| High-Voltage DC-DC LED Driver | General-Purpose Constant Current Source |
|
Use Scenario: Off-line LED driver stage in smart streetlight controllers accepting 120–305 VDC input from PV or battery systems. IC Role / Device Role / Timing Role: Universal-input Buck controller with 300 V MOSFET and programmable OVP for variable-string configurations. Use Value: Supports wide DC input range without re-design; ROVP pin allows flexible open-circuit voltage setting. |
Use Scenario: Precision current source for analog sensor biasing or laser diode control in industrial instrumentation. IC Role / Device Role / Timing Role: Closed-loop CC regulator using external sense resistor and internal 0.400 V reference for ±3% accuracy. Use Value: Delivers stable current independent of supply ripple; GND-referenced CS pin simplifies layout vs. high-side sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Buck LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL1676-30AS7-13 | Same SO-7 package but integrates 300 V/3.0 A MOSFET (vs. 2.0 A); RDS(ON) = 3 Ω (vs. 6.5 Ω). | Supports up to 13 W output (vs. 10 W); requires larger heatsinking due to higher conduction loss at same current. | Select when higher output power is needed without changing board layout; verify thermal margin at max ambient. |
| AL1676-20BS7-13 | Same 2.0 A current rating but 500 V MOSFET (vs. 300 V); RDS(ON) = 6 Ω (vs. 6.5 Ω); identical pinout and control logic. | Enables use in 277 VAC or surge-prone environments where 300 V rating is marginal; adds ~0.5 V gate drive overhead. | Choose for enhanced surge immunity in North American 277 VAC installations; no changes to compensation or sense network. |
Compared with AL1676-20AS7-13, the -30AS7-13 offers +50% output current headroom at identical voltage rating, while the -20BS7-13 trades higher voltage capability for unchanged current delivery-both retain identical control architecture, protection features, and SO-7 footprint.
Availability
AL1676-20AS7-13 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 AL1676-20AS7-13 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 ICs, specializing in power management, signal integrity, and lighting solutions with ISO/TS 16949-certified operations.
The AL1676 belongs to Diodes' universal AC-input LED driver product line, designed specifically for cost-sensitive, high-reliability solid-state lighting applications requiring integrated high-voltage switches and comprehensive protection.
FAQ
What is the maximum continuous output power supported by AL1676-20AS7-13?
The AL1676-20AS7-13 supports up to 10 W output power, limited by its integrated 300 V/2.0 A MOSFET and SO-7 package thermal resistance (θJA = 123 °C/W). At 230 VAC input and 60 °C ambient, sustained operation requires output current ≤200 mA and minimum LED string voltage ≥20 V to maintain BCM operation and avoid thermal foldback.
How does the thermal foldback function protect the system?
Thermal foldback activates at +150 °C junction temperature, linearly reducing the internal 0.400 V reference voltage to lower output current and dissipate less power. This prevents thermal runaway while maintaining regulated operation-unlike latched OTP shutdown (+170 °C), foldback allows graceful derating without system reset.
Can AL1676-20AS7-13 operate with a 12 VDC input?
No. AL1676-20AS7-13 is designed exclusively for universal AC input (85–277 VAC) and lacks DC-start capability. Its UVLO startup threshold is 14.5 V, and internal VCC clamp is 15.5 V-operation below 85 VAC causes failure to start or sustain switching. For DC-input LED drivers, Diodes offers the AP3765 or AL9910 families.
What is the purpose of the NC pin (Pin 6) and how should it be handled?
Pin 6 is a no-connect terminal with no internal bond wire; it must remain unconnected on the PCB. Routing traces or applying solder paste to Pin 6 risks shorting adjacent pins (GND and D) or inducing parasitic coupling into the high-dV/dt drain node, potentially causing erratic switching or false OCP triggering.
AL1676-20AS7-13 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:
- 300V
- Current - Output / Channel:
- 2A
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 7-SO
AL1676-20AS7-13 FAQ
1.How can I place an order for AL1676-20AS7-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL1676-20AS7-13 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 AL1676-20AS7-13 reliable?
The price and inventory of AL1676-20AS7-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL1676-20AS7-13 is usually 5 days.
3.What payment methods are accepted for AL1676-20AS7-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL1676-20AS7-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL1676-20AS7-13?
AL1676-20AS7-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL1676-20AS7-13 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 AL1676-20AS7-13?
For technical support, including AL1676-20AS7-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL1676-20AS7-13 requirements.
6.How does Aetrix verify that AL1676-20AS7-13 is sourced from the original manufacturer or authorized distributors?
All AL1676-20AS7-13 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 AL1676-20AS7-13 meets industry standards.
7.What is the process for return or replacement of AL1676-20AS7-13?
All AL1676-20AS7-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL1676-20AS7-13, 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 AL1676-20AS7-13 part is unused and in its original packaging.
Return procedure for AL1676-20AS7-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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