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Diodes Incorporated AL5809-15P1-7
- Part No.:
- AL5809-15P1-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- POWERDI®123
- Datasheet:
-
AL5809-15P1-7.pdf
- Description:
- IC LED DRVR LIN PWM 15MA PDI123
- Quantity:
- Payment:
- Shipping:
Inventory:692
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Product details
Overview
AL5809-15P1-7 from Diodes Incorporated is a two-terminal linear constant current LED driver in PowerDI123 package, delivering precisely 15mA ±5% over -40°C to +125°C with 20ppm/°C temperature drift. It operates across 2.5V–60V input-to-output differential voltage and supports both high-side and low-side LED string configurations for offline AC/DC LED lamps and signage.
For engineers reviewing the AL5809-15P1-7 datasheet, AL5809-15P1-7 pinout, AL5809-15P1-7 application, or AL5809-15P1-7 equivalent, key selection criteria include its fixed 15mA output, 60V floating-voltage rating between IN/OUT, thermal shutdown at +165°C, and compatibility with PWM dimming down to 100Hz duty cycles.
Technical Context
The AL5809-15P1-7 integrates an internal precision current mirror and low-dropout regulator to maintain stable 15mA output without external resistors. Its floating ground architecture enables direct series connection with LED strings while sustaining up to 60V differential voltage between IN and OUT terminals.
It features built-in thermal shutdown with +165°C trip point and +30°C hysteresis, and supports PWM dimming via external MOSFET switching at the OUT pin. Minimum on/off pulse widths are each 500µs, limiting usable PWM frequency to ≥100Hz for reliable current regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Current | 15mA ±5% - factory-trimmed fixed output; no external resistor required. |
| Input-Output Voltage Range | 2.5V to 60V - enables driving long LED strings from 12V–48V supplies or rectified AC lines. |
| Temperature Drift | 20ppm/°C - ensures minimal current variation across industrial temperature range (-40°C to +125°C). |
| Thermal Shutdown | +165°C with +30°C hysteresis - protects device during sustained overload or poor PCB thermal design. |
| ESD Rating | 4kV HBM - provides robust handling margin in manufacturing and assembly environments. |
| Power Dissipation (PowerDI123) | 1.24W max (on 50.8mm × 50.8mm GETEK) - defines maximum continuous LED current under thermal constraints. |
| PWM Dimming Support | 100–200Hz - compatible with standard low-frequency dimming circuits using external MOSFET switch. |
Pinout & Package
AL5809-15P1-7 uses the PowerDI123 surface-mount package (3.7mm × 2.8mm × 1.78mm), thermally optimized with exposed cathode pad for PCB heat sinking. The two-terminal configuration eliminates polarity ambiguity: IN and OUT pins serve as bidirectional current path terminals depending on circuit topology.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Current Input Terminal | In low-side configuration: connects to LED cathode; in high-side: connects to supply rail - defines current entry point into device. |
| OUT | Current Output Terminal | In low-side configuration: connects to LED anode; in high-side: connects to LED cathode - defines current exit point and reference node. |
Key Features
| Feature | Design Value |
|---|---|
| Two-terminal simplicity | Eliminates external current-setting resistor and bias network - reduces BOM count and layout area. |
| Floating 60V IN-OUT rating | Enables direct series placement in high-voltage LED chains without level-shifting or isolation components. |
| ±5% current accuracy over temperature | Maintains consistent LED brightness across ambient extremes without calibration or trimming. |
| Thermally robust PowerDI123 | 1.24W power handling on optimized PCB - supports higher current density than SOD-123 alternatives. |
| PWM dimming interface | OUT pin directly drives external MOSFET gate - enables analog-like dimming control without dedicated IC interface. |
Applications
| Offline LED Lamps | LED Power Supplies |
|---|---|
Use Scenario: AC mains-powered LED bulbs with integrated rectifier and passive filtering. IC Role / Device Role / Timing Role: Two-terminal constant current regulator placed in series with LED string to replace electrolytic capacitor-based current limiting. Use Value: Enables compact, high-reliability lamp designs with no electrolytic capacitors and reduced component count. |
Use Scenario: Secondary-side constant current stage in isolated flyback or buck-derived LED drivers. IC Role / Device Role / Timing Role: Final current regulation element after primary-side controller, absorbing input ripple and stabilizing LED current. Use Value: Improves current regulation accuracy versus resistor-only solutions, especially under varying line conditions. |
| White Goods Illumination | LED Signs |
Use Scenario: Interior lighting in refrigerators, ovens, and dishwashers requiring wide temperature operation. IC Role / Device Role / Timing Role: Constant current source for indicator and task lighting LEDs mounted near heat-generating components. Use Value: Maintains consistent luminance from -40°C freezer compartments to +85°C oven control panels. |
Use Scenario: Channel letter and architectural signage powered from 12V–48V DC distribution rails. IC Role / Device Role / Timing Role: Per-string current regulator enabling uniform brightness across parallel LED branches. Use Value: Prevents current hogging in multi-string arrays without individual current sources per branch. |
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 |
|---|---|---|---|
| AL5809-15S1-7 | SOD-123 package; lower thermal capability (0.36W vs. 1.24W); same 15mA ±5% current spec. | Limited to lower-power LED strings (<15mA continuous at elevated ambient) due to higher θJA (278°C/W). | Select when board space is constrained and power dissipation remains below 250mW. |
| NSI45015WT1G | 15mA ±3% accuracy; 45V max VIN-OUT; 1.5W PowerDI123 rating; 100ppm/°C drift. | Lower voltage headroom limits LED string length; tighter initial accuracy but higher thermal drift. | Prefer where absolute current precision outweighs temperature stability and voltage range requirements. |
Compared with AL5809-15P1-7, the AL5809-15S1-7 trades thermal performance for footprint reduction, while the NSI45015WT1G offers tighter initial tolerance but sacrifices voltage range and temperature stability-making AL5809-15P1-7 optimal for high-voltage, thermally demanding offline LED applications.
Availability
AL5809-15P1-7 is available at Aetrix Electronics and suitable for offline LED lamps, white goods illumination, and LED signage requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AL5809-15P1-7 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, specializing in high-reliability power management, signal integrity, and LED driver solutions for industrial and consumer markets.
The AL5809 product line delivers cost-effective, resistorless constant current regulation for LED lighting systems - designed specifically for simplified, high-voltage, two-terminal implementation in AC/DC and DC/DC LED applications.
FAQ
Can AL5809-15P1-7 be used in high-side and low-side configurations?
Yes. In low-side mode, connect LED anode to OUT and cathode to IN; in high-side mode, connect LED anode to IN and cathode to OUT. The device's floating ground architecture allows either topology without additional level-shifting circuitry, provided the 60V IN-OUT differential rating is not exceeded.
What is the minimum input voltage required for AL5809-15P1-7 to regulate properly?
The minimum operating voltage is 2.5V across IN and OUT terminals. Below this, the internal LDO cannot power the regulation block, causing unregulated current drop. This allows driving as few as one LED in series from a 3.3V rail or two standard white LEDs (Vf ≈ 3.25V each) from a 12V supply.
Does AL5809-15P1-7 require a heatsink for 15mA operation?
No external heatsink is required at 15mA under typical conditions. On a 25.4mm × 25.4mm FR-4 PCB with thermal vias, power dissipation is ~90mW at 12V input and 6.5V LED string - well within the 0.68W rating of the PowerDI123 package. Thermal derating begins above +85°C ambient.
How does PWM dimming interact with AL5809-15P1-7's thermal shutdown?
PWM dimming modulates average current but does not reduce peak junction temperature during ON pulses. At 100% duty cycle, thermal shutdown triggers at +165°C; at lower duty cycles, average power drops, allowing higher ambient operation before shutdown. However, instantaneous power during ON time still governs peak TJ, so proper thermal design remains essential.
AL5809-15P1-7 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:
- 15mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
AL5809-15P1-7 FAQ
1.How can I place an order for AL5809-15P1-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL5809-15P1-7 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 AL5809-15P1-7 reliable?
The price and inventory of AL5809-15P1-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5809-15P1-7 is usually 5 days.
3.What payment methods are accepted for AL5809-15P1-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5809-15P1-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL5809-15P1-7?
AL5809-15P1-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL5809-15P1-7 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 AL5809-15P1-7?
For technical support, including AL5809-15P1-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5809-15P1-7 requirements.
6.How does Aetrix verify that AL5809-15P1-7 is sourced from the original manufacturer or authorized distributors?
All AL5809-15P1-7 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 AL5809-15P1-7 meets industry standards.
7.What is the process for return or replacement of AL5809-15P1-7?
All AL5809-15P1-7 units undergo pre-shipment inspection (PSI). If there is an issue with AL5809-15P1-7, 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 AL5809-15P1-7 part is unused and in its original packaging.
Return procedure for AL5809-15P1-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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