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

Diodes Incorporated AL5809-25P1-7

Name: AL5809-25P1-7
Brand: Diodes Incorporated
SKU: AL5809-25P1-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AL5809-25P1-7

Manufacturer:: Diodes Incorporated

Category:: LED Drivers

Package:: POWERDI®123

Datasheet:: AL5809-25P1-7.pdf

Description:: IC LED DRVR LIN PWM 25MA PDI123

Quantity:: RFQ Add To RFQ list

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Inventory:14,923

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Product details

Overview

AL5809-25P1-7 from Diodes Incorporated is a two-terminal linear constant current LED driver in PowerDI123 package, delivering precisely 25mA ±5% over −40°C to +125°C with 20ppm/°C temperature drift. It operates across 2.5V–60V input-to-output voltage range and supports both high-side and low-side LED string configurations for offline AC/DC LED lamps and signage.

For engineers reviewing the AL5809-25P1-7 datasheet, AL5809-25P1-7 pinout, AL5809-25P1-7 application, or AL5809-25P1-7 equivalent, key selection criteria include its fixed 25mA output, 60V floating-voltage rating between IN/OUT, thermal shutdown at +165°C, PowerDI123 thermal performance (θJA = 148.6°C/W on FR-4), and compatibility with PWM dimming down to 100Hz.

Technical Context

The AL5809-25P1-7 integrates an internal LDO and precision current mirror to regulate 25mA without external resistors. Its floating two-terminal architecture enables direct series connection with LED strings, eliminating ground-referenced control complexity.

It features built-in thermal shutdown (TSHDN = +165°C, hysteresis = +30°C) and robust ESD protection (4kV HBM). The device maintains regulation down to 2.5V V_IN-OUT, enabling operation with short LED chains in 12V systems while tolerating up to 80V transient peaks.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	25mA ±5% over −40°C to +125°C - ensures stable LED brightness without calibration or trimming.
V_IN-OUT Range	2.5V to 60V - supports long LED strings in offline AC/DC applications and withstands 80V transients.
Temperature Drift	20ppm/°C - minimizes current variation across industrial temperature range, critical for consistent luminance.
Thermal Shutdown	+165°C with +30°C hysteresis - protects against sustained overloads while enabling automatic recovery.
ESD Rating	4kV HBM - provides robust handling during PCB assembly and system integration.
Package Thermal Resistance	θ_JA = 148.6°C/W (FR-4, 25.4mm × 25.4mm) - defines maximum ambient temperature for 1.2W dissipation in standard layout.
PWM Dimming Support	t_{ON_MIN}/t_{OFF_MIN} = 500µs - enables reliable 100–200Hz dimming with ≥5% duty cycle minimum.

Pinout & Package

AL5809-25P1-7 uses the PowerDI123 surface-mount package (3.7mm × 2.8mm × 1.78mm), optimized for thermal dissipation with exposed cathode pad. Its two-terminal design eliminates ground reference constraints and simplifies PCB routing.

Pin/Terminal	Circuit Role	Design Meaning
In	LED current input terminal	Connected to LED cathode in low-side configuration or LED anode in high-side configuration - defines current entry path.
Out	LED current output terminal	Connected to LED anode in low-side or LED cathode in high-side - completes current loop and serves as floating reference node.

Key Features

Feature	Design Value
Two-terminal constant current regulation	Eliminates external current-setting resistor and simplifies BOM for cost-sensitive LED lighting designs.
Floating 60V IN–OUT rating	Enables direct integration into high-voltage LED strings without level-shifting circuitry or isolation components.
±5% current accuracy over full temperature range	Guarantees consistent LED flux across automotive (-40°C) and industrial (+125°C) operating environments.
Thermally robust PowerDI123 package	Supports 1.24W power dissipation on optimized GETEK PCB - extends lifetime in enclosed lamp housings.
PWM-compatible switching behavior	500µs min on/off pulse width enables smooth analog-like dimming using low-cost microcontroller GPIOs.

Applications

Offline LED Lamps

LED Signs

Use Scenario: Retrofit A19 and GU10 LED bulbs powered directly from rectified AC mains (100–277VAC).

IC Role / Device Role / Timing Role: Two-terminal constant current regulator placed in series with LED string to replace electrolytic capacitors and simplify EMI filtering.

Use Value: Enables compact, long-life lamp designs with no external current sense resistor or feedback optocoupler.

Use Scenario: Channel letter and architectural signage requiring uniform brightness across multi-segment LED arrays.

IC Role / Device Role / Timing Role: High-side current source driving parallel LED branches from a common DC bus.

Use Value: Ensures consistent luminance across segments despite forward voltage variations between LED batches.

White Goods Illumination

Instrumentation Panels

Use Scenario: Interior lighting in refrigerators, dishwashers, and ovens where ambient temperature swings from −20°C to +85°C.

IC Role / Device Role / Timing Role: Low-side constant current driver powering white LEDs behind diffuser panels.

Use Value: Maintains ±5% current stability across wide temperature range, preventing visible dimming or color shift.

Use Scenario: Backlighting for LCD displays and status indicators in medical and test equipment enclosures.

IC Role / Device Role / Timing Role: Fixed-current source enabling precise PWM dimming via external MOSFET switch.

Use Value: Delivers flicker-free dimming down to 5% duty cycle at 100Hz, meeting IEC 61000-3-2 harmonic limits.

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
AL5809-25S1-7	SOD-123 package (θ_JA = 278°C/W), lower max power (0.36W), same 25mA ±5% spec	Limited to low-power indicator LEDs (<20mA continuous) due to thermal constraints	Select when board space is constrained and power dissipation ≤150mW; avoid for >100mA LED strings.
NSI45020AZT1G	20mA fixed output, SOD-123, ±3% tolerance, 45V max V_IN-OUT, no thermal shutdown	Not suitable for 60V offline applications or thermally demanding environments	Choose only for low-voltage DC-powered indicators where tighter current tolerance outweighs missing protection features.

Compared with AL5809-25S1-7, the -25P1-7 delivers 3.5× higher power capability and superior thermal management; versus NSI45020AZT1G, it adds 15V headroom, thermal shutdown, and 20ppm/°C drift control - essential for robust offline LED systems.

Availability

AL5809-25P1-7 is available at Aetrix Electronics and suitable for offline LED lamps, LED signage, and white goods illumination requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for AL5809-25P1-7 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The AL5809 product line delivers two-terminal constant current drivers for cost-sensitive, thermally constrained LED lighting systems - designed to replace electrolytic capacitors and simplify AC/DC LED driver topologies.

FAQ

What is the minimum input-to-output voltage required for AL5809-25P1-7 to regulate?

The AL5809-25P1-7 requires a minimum V_IN-OUT of 2.5V to initiate regulation, verified across −40°C to +125°C. Below this threshold, the device enters dropout and current drops nonlinearly. This enables driving as few as two 3.25V LEDs from a 12V rail while maintaining regulation margin.

Can AL5809-25P1-7 be used in high-side configuration with common-anode LED strings?

Yes - the AL5809-25P1-7 supports high-side operation: connect the LED anode to the OUT pin and cathode to the load return. Its floating 60V IN–OUT rating allows placement between the LED string and positive rail without ground reference, enabling true high-side constant current control.

How does thermal shutdown behave under sustained overload conditions?

When junction temperature reaches +165°C, AL5809-25P1-7 disables current flow. Recovery occurs after temperature falls by +30°C (to +135°C), confirmed in Figure 18 of the datasheet. This hysteresis prevents oscillation during marginal thermal conditions and ensures safe cooldown before re-enabling.

Is AL5809-25P1-7 compatible with PWM dimming using a microcontroller GPIO?

Yes - the device supports PWM dimming via external MOSFET switching at the OUT pin. With t_{ON_MIN}/t_{OFF_MIN} = 500µs, it reliably handles 100–200Hz signals from standard MCU GPIOs. Minimum duty cycle is 5% at 100Hz, enabling smooth brightness control without visible flicker.

AL5809-25P1-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: POWERDI®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:: 25mA

Frequency:: -

Dimming:: -

Applications:: Signage

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerDI™ 123

AL5809-25P1-7 FAQ

1.How can I place an order for AL5809-25P1-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AL5809-25P1-7 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 AL5809-25P1-7 reliable?

The price and inventory of AL5809-25P1-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5809-25P1-7 is usually 5 days.

3.What payment methods are accepted for AL5809-25P1-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5809-25P1-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AL5809-25P1-7?

AL5809-25P1-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AL5809-25P1-7 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 AL5809-25P1-7?

For technical support, including AL5809-25P1-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5809-25P1-7 requirements.

6.How does Aetrix verify that AL5809-25P1-7 is sourced from the original manufacturer or authorized distributors?

All AL5809-25P1-7 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 AL5809-25P1-7 meets industry standards.

7.What is the process for return or replacement of AL5809-25P1-7?

All AL5809-25P1-7 units undergo pre-shipment inspection (PSI). If there is an issue with AL5809-25P1-7, 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 AL5809-25P1-7 part is unused and in its original packaging.

Return procedure for AL5809-25P1-7:

1.Submit a request within 90 days.

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

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