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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Diodes Incorporated AL5809-30S1-7

Name: AL5809-30S1-7
Brand: Diodes Incorporated
SKU: AL5809-30S1-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AL5809-30S1-7

Manufacturer:: Diodes Incorporated

Category:: LED Drivers

Package:: SOD-123

Datasheet:: AL5809-30S1-7.pdf

Description:: IC LED DRVR LIN PWM 30MA SOD123

Quantity:: RFQ Add To RFQ list

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Inventory:25,913

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Product details

Overview

AL5809-30S1-7 from Diodes Incorporated is a two-terminal constant-current linear LED driver in SOD-123 package, delivering precisely 30 mA ±5% over -40°C to +125°C, with 2.5–60 V input-to-output voltage range and 20 ppm/°C temperature drift. It supports both high-side and low-side LED string configurations for offline AC-powered lamps and signage.

For engineers reviewing the AL5809-30S1-7 datasheet, AL5809-30S1-7 pinout, AL5809-30S1-7 application, or AL5809-30S1-7 equivalent, key selection criteria include its fixed 30 mA output, SOD-123 thermal limits (0.36 W max at TA = 25°C), dual-side topology flexibility, and PWM dimming compatibility down to 100 Hz with 0.5 ms minimum on/off pulse width.

Technical Context

The AL5809-30S1-7 integrates an internal LDO and precision current mirror to regulate LED current without external resistors. Its floating ground architecture enables 60 V voltage rating between IN and OUT pins, making it suitable for direct connection across LED strings in mains-referenced circuits.

It operates as a two-terminal series regulator: current flows unidirectionally from IN to OUT, with startup triggered at ≥2.5 V and thermal shutdown active above +165°C junction temperature with +30°C hysteresis. No enable pin or control interface is present - functionality is fully autonomous.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	30 mA ±5% over -40°C to +125°C - ensures stable illumination intensity across industrial ambient conditions
Input Voltage Range	2.5 V to 60 V across IN–OUT terminals - supports up to ~18 white LEDs (3.3 V each) in series from 60 V supply
Temperature Drift	20 ppm/°C - maintains current accuracy within ±0.3 mA over full operating range
Thermal Shutdown	+165°C TJ with +30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking
ESD Rating	4 kV HBM - sufficient for standard handling in non-classified assembly environments
Power Dissipation	0.36 W max at TA = 25°C (SOD-123) - requires ≥50.8 mm × 50.8 mm 2 oz copper pad with thermal vias for full-rated operation
Min Pulse Width	500 µs on/off - sets practical lower limit for PWM dimming frequency (≥100 Hz at 5% duty cycle)

Pinout & Package

SOD-123 surface-mount package: compact 2.65 mm × 1.55 mm footprint, 0.3 mm profile, cathode-band-marked polarity, optimized for reflow soldering and manual inspection.

Pin/Terminal	Circuit Role	Design Meaning
In	LED current input terminal	Connects to LED cathode in low-side configuration or power rail in high-side configuration - carries full regulated current
Out	LED current output terminal	Connects to LED anode in low-side configuration or LED cathode in high-side configuration - referenced ground for internal regulation

Key Features

Feature	Design Value
Fixed 30 mA output	Eliminates external current-setting resistor, reducing BOM count and layout area in cost-sensitive LED modules
High-side & low-side support	Enables placement flexibility - driver can be inserted either before or after LED string without circuit redesign
PWM dimming ready	Compatible with external MOSFET switching at OUT pin using 100–200 Hz square wave - no additional IC or timing components required
Lead-free & halogen-free	Fully RoHS 2 compliant with <900 ppm Br/Cl and <1000 ppm Sb - meets global environmental compliance for consumer and white-goods applications
60 V IN–OUT rating	Withstands peak line voltages in offline LED drivers without external clamping - simplifies surge protection design

Applications

Offline LED Lamps

LED Signs

Use Scenario: Mains-powered A19 retrofit bulbs with 12–18 white LEDs in series.

IC Role / Device Role / Timing Role: Two-terminal constant-current regulator placed in series with LED string, acting as smart ballast.

Use Value: Delivers stable 30 mA despite 10–15% AC line variation and ambient shifts from 0°C to 60°C - eliminates visible flicker and color shift.

Use Scenario: Outdoor channel letters with segmented red/green/blue LED arrays powered from 24–48 V DC supplies.

IC Role / Device Role / Timing Role: High-side current source per color segment, enabling common-cathode wiring and simplified controller interface.

Use Value: 60 V rating tolerates voltage spikes from long cable runs and inductive loads - improves field reliability without added TVS diodes.

White Goods

Instrumentation Illumination

Use Scenario: Interior lighting in refrigerators and dishwashers where space, thermal budget, and EMI are constrained.

IC Role / Device Role / Timing Role: Low-power constant-current source driving 3–5 indicator LEDs behind acrylic panels.

Use Value: SOD-123 package fits tight cutouts; ±5% current tolerance ensures consistent brightness across production batches and temperature cycling.

Use Scenario: Backlighting for analog panel meters and digital displays in test equipment and medical devices.

IC Role / Device Role / Timing Role: Precision current source for green/yellow LEDs requiring stable luminance under varying ambient temperatures.

Use Value: 20 ppm/°C drift ensures <±0.5% luminance change from -20°C to +70°C - critical for calibrated visual indicators.

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
AL5809-30P1-7	Same 30 mA output but in PowerDI123 package (1.24 W max dissipation vs. 0.36 W)	Supports higher power LED strings and wider ambient ranges due to superior thermal performance	Select when >150 mW power dissipation is expected or board space allows larger footprint
NSI45030AZT1G	30 mA ±3% accuracy, 45 V max V_IN–OUT, SOD-123, but no thermal shutdown	Lacks overtemperature protection - requires external thermal management in enclosed fixtures	Choose only in thermally benign environments with verified junction temperature <125°C

Compared with AL5809-30P1-7, the SOD-123 variant trades thermal headroom for board-space savings; versus NSI45030AZT1G, it adds robust thermal protection at the cost of slightly lower voltage rating and wider current tolerance.

Availability

AL5809-30S1-7 is available at Aetrix Electronics and suitable for offline LED lamps, LED signs, and white goods requiring stable component supply, consistent luminance control, and RoHS-compliant packaging.

Supply support for AL5809-30S1-7 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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.

The AL5809 belongs to Diodes' LED driver product line, engineered specifically for cost-sensitive, high-volume linear LED lighting applications where simplicity, reliability, and regulatory compliance are prioritized over programmability or digital control.

FAQ

What is the maximum LED string voltage that AL5809-30S1-7 can support?

The AL5809-30S1-7 supports up to 60 V across its IN–OUT terminals. For a 30 mA LED string with typical forward voltage of 3.2 V per LED, this allows up to 18 LEDs in series (18 × 3.2 V = 57.6 V). The actual limit depends on minimum required headroom (2.5 V) and worst-case V_F variation across the string.

Can AL5809-30S1-7 be used in high-side configuration with AC input?

Yes - the AL5809-30S1-7's floating ground and 60 V IN–OUT rating allow safe high-side placement in rectified AC circuits. However, full-wave rectification and bulk capacitance must be used to ensure continuous conduction; zero-crossing dropout may cause visible flicker if not properly filtered.

Does AL5809-30S1-7 require a heatsink on standard FR-4 PCB?

No dedicated heatsink is required, but thermal performance depends on PCB layout. For full 30 mA operation at 60 V drop (1.8 W dissipation), the SOD-123 package demands a 50.8 mm × 50.8 mm 2 oz copper pad with ≥6 thermal vias to inner/ground layers. At lower V_IN–OUT, minimal copper suffices.

Is AL5809-30S1-7 compatible with PWM dimming below 100 Hz?

No - the datasheet specifies guaranteed operation only between 100 Hz and 200 Hz. Below 100 Hz, the 500 µs minimum on/off time may cause incomplete current settling, leading to inconsistent brightness or audible coil whine in magnetic components. Use 100 Hz minimum for reliable dimming.

AL5809-30S1-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Linear

Topology:: -

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 2.5V

Voltage - Supply (Max):: 60V

Voltage - Output:: 60V

Current - Output / Channel:: 30mA

Frequency:: -

Dimming:: -

Applications:: Signage

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123

AL5809-30S1-7 FAQ

1.How can I place an order for AL5809-30S1-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AL5809-30S1-7 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 AL5809-30S1-7 reliable?

The price and inventory of AL5809-30S1-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5809-30S1-7 is usually 5 days.

3.What payment methods are accepted for AL5809-30S1-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5809-30S1-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AL5809-30S1-7?

AL5809-30S1-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AL5809-30S1-7 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 AL5809-30S1-7?

For technical support, including AL5809-30S1-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5809-30S1-7 requirements.

6.How does Aetrix verify that AL5809-30S1-7 is sourced from the original manufacturer or authorized distributors?

All AL5809-30S1-7 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 AL5809-30S1-7 meets industry standards.

7.What is the process for return or replacement of AL5809-30S1-7?

All AL5809-30S1-7 units undergo pre-shipment inspection (PSI). If there is an issue with AL5809-30S1-7, 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 AL5809-30S1-7 part is unused and in its original packaging.

Return procedure for AL5809-30S1-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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