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Diodes Incorporated AL5809-20QP1-7
- Part No.:
- AL5809-20QP1-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- POWERDI®123
- Datasheet:
-
AL5809-20QP1-7.pdf
- Description:
- IC LED DRVR LIN PWM 20MA PDI123
- Quantity:
- Payment:
- Shipping:
Inventory:34,586
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Product details
Overview
AL5809-20QP1-7 from Diodes Incorporated is a two-terminal, AEC-Q100 Grade 1 qualified constant current linear LED driver delivering 20 mA ±5% over -40°C to +150°C junction temperature, with 2.5 V to 60 V operating voltage range and 20 ppm/°C temperature stability. It supports both high-side and low-side LED string configurations in automotive interior lamps and instrumentation illumination.
For engineers reviewing the AL5809-20QP1-7 datasheet, AL5809-20QP1-7 pinout, AL5809-20QP1-7 application, or AL5809-20QP1-7 equivalent, key selection criteria include its fixed 20 mA output accuracy, PowerDI123 (Type B) thermal performance (1.5 W max dissipation), 60 V transient tolerance, and PWM dimming compatibility via external MOSFET switching.
Technical Context
The AL5809-20QP1-7 implements a precision current mirror architecture with an internal fixed reference resistor, enabling stable 20 mA regulation without external components. Its low-dropout internal LDO powers the control block, and startup occurs at ~1.5 V across terminals.
Thermal shutdown activates at +165°C with +30°C hysteresis, ensuring robust operation under automotive transients. The device operates with ≤1% line regulation over 2.5–60 V input, and supports PWM dimming down to 500 µs minimum on/off pulse width at 100–200 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 20 mA ±5% at +25°C; 17–23 mA over -40°C to +150°C - ensures consistent LED brightness across automotive ambient extremes |
| Operating Voltage Range | 2.5 V to 60 V - supports direct connection to 12 V/24 V automotive systems and withstands load-dump transients |
| Temperature Stability | 20 ppm/°C - minimizes current drift in engine bay or dashboard environments |
| Thermal Shutdown | +165°C activation with +30°C hysteresis - prevents thermal runaway during sustained high-power operation |
| Package Thermal Resistance | θJA = 81.4°C/W on 50.8 mm × 50.8 mm GETEK PCB - enables 1.53 W max power dissipation with proper layout |
| PWM Dimming Support | Min. 500 µs on/off pulses at 100–200 Hz - allows smooth brightness control without visible flicker |
Pinout & Package
Supplied in the thermally robust PowerDI123 (Type B) package (3.70 mm × 2.80 mm × 1.78 mm), featuring exposed cathode pad for enhanced heat transfer and optimized for surface-mount assembly on FR-4 or GETEK PCBs with thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | LED current input terminal | Current flows into this pin; connects to LED cathode in low-side configuration or LED anode in high-side configuration |
| OUT (Pin 2) | LED current output terminal | Current flows out of this pin; connects to LED anode in low-side configuration or LED cathode in high-side configuration |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 20 mA output | Eliminates external current-setting resistor, reducing BOM count and PCB area in space-constrained automotive modules |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C ambient operation - meets stringent reliability requirements for instrument clusters and interior lighting |
| Two-terminal topology | Enables drop-in replacement of discrete current-limiting resistors while adding active regulation and thermal protection |
| 60 V absolute maximum rating | Withstands ISO 7637-2 Pulse 1 (−150 V) and Pulse 5a (75 V) transients when used with appropriate clamping circuitry |
| Lead-free & halogen-free | Complies with RoHS 2 and automotive green standards (<900 ppm Br/Cl, <1000 ppm Sb) - supports global vehicle recycling mandates |
Applications
| Automotive Interior Lamps | Instrumentation Illumination |
|---|---|
Use Scenario: LED backlighting for door handle illumination, footwell lighting, and map reading lamps in passenger cabins. IC Role / Device Role / Timing Role: Constant current regulator maintaining uniform luminance across varying battery voltage (9–16 V) and cabin temperature (−40°C to +85°C). Use Value: Delivers stable 20 mA drive without external components, reducing system cost and improving long-term lumen maintenance versus passive resistors. | Use Scenario: Segment or icon backlighting in digital instrument clusters and center-stack displays. IC Role / Device Role / Timing Role: High-side or low-side current source enabling flexible PCB layout and minimizing EMI from shared ground paths. Use Value: ±5% current accuracy ensures consistent color point and contrast ratio across display zones, critical for OEM visual quality standards. |
| Automotive Parking Lights | LED Status Indicators |
Use Scenario: Low-power amber or white LED arrays in rear parking lamp modules subject to vibration and thermal cycling. IC Role / Device Role / Timing Role: Two-terminal CCR providing fault-tolerant current regulation independent of LED forward voltage variation. Use Value: 60 V rating accommodates reverse-polarity protection circuits and load-dump suppression, extending module lifetime in harsh under-hood environments. | Use Scenario: Diagnostic LEDs on ECUs, junction boxes, and ADAS control units requiring reliable status indication over full vehicle lifecycle. IC Role / Device Role / Timing Role: Standalone current source with thermal shutdown, eliminating need for microcontroller GPIO current limiting or external FET drivers. Use Value: Self-protecting operation prevents LED burnout during extended diagnostic mode or ambient temperature excursions beyond spec 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 |
|---|---|---|---|
| AL5809-20QP2-7 | Same 20 mA output, identical specs, but packaged in PowerDI123 (Type A) with different thermal pad geometry and θJA = 148.6°C/W | Lower power handling (0.84 W vs. 1.53 W) - suitable only for lower ambient or reduced VINOUT conditions | Select when board layout constraints require Type A footprint or when thermal budget permits higher junction rise |
| NSI45020AT1G | 20 mA ±5%, 50 V rating, SOD-123FL package, −40°C to +125°C ambient, no thermal shutdown | Lacks thermal protection and automotive qualification - limited to non-safety-critical, lower-temperature applications | Choose for cost-sensitive consumer lighting where AEC-Q100 compliance and thermal safety are not required |
Compared with AL5809-20QP2-7, the AL5809-20QP1-7 offers superior thermal performance (1.53 W vs. 0.84 W) due to PowerDI123 (Type B) construction; versus NSI45020AT1G, it adds AEC-Q100 Grade 1 qualification, thermal shutdown, and 60 V robustness - essential for production automotive use.
Availability
AL5809-20QP1-7 is available at Aetrix Electronics and suitable for automotive interior lamps, instrumentation illumination, and parking light modules requiring stable component supply, PPAP documentation, and long-term automotive lifecycle support.
Supply support for AL5809-20QP1-7 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 ICs, specializing in high-reliability power management, signal integrity, and lighting solutions for automotive, industrial, and consumer markets.
The AL5809Q product line delivers AEC-Q100 qualified two-terminal constant current regulators targeting cost-sensitive, space-constrained automotive LED lighting where simplicity, thermal resilience, and transient robustness are critical.
FAQ
What is the minimum input voltage required for AL5809-20QP1-7 to begin regulating?
The AL5809-20QP1-7 turns on after a short delay once the voltage across its IN and OUT terminals reaches approximately 1.5 V, with a guaranteed minimum startup voltage of 1.0 V and maximum of 2.0 V over temperature. This threshold enables reliable operation even during cold-cranking events where battery voltage dips to 6–9 V.
Can AL5809-20QP1-7 be used in parallel to increase total LED current?
Yes - multiple AL5809-20QP1-7 devices can be connected in parallel to scale total LED current, as confirmed in the datasheet's Figure 3. Each unit maintains its own 20 mA regulation, and parallel operation requires matched PCB thermal layout to ensure balanced current sharing and avoid thermal runaway.
Does AL5809-20QP1-7 require external components for basic operation?
No - the AL5809-20QP1-7 is a true two-terminal device requiring no external resistors, capacitors, or biasing components for constant current regulation. Only the LED string and supply are needed; optional external MOSFETs may be added solely for PWM dimming functionality.
How does thermal shutdown behave during continuous overtemperature conditions?
When junction temperature reaches +165°C, AL5809-20QP1-7 disables current flow until temperature drops by +30°C hysteresis (to +135°C), then automatically resumes regulation. This cycle prevents permanent damage and provides fail-safe behavior during sustained overload or inadequate heatsinking.
AL5809-20QP1-7 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:
- 20mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
AL5809-20QP1-7 FAQ
1.How can I place an order for AL5809-20QP1-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL5809-20QP1-7 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 AL5809-20QP1-7 reliable?
The price and inventory of AL5809-20QP1-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5809-20QP1-7 is usually 5 days.
3.What payment methods are accepted for AL5809-20QP1-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5809-20QP1-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL5809-20QP1-7?
AL5809-20QP1-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL5809-20QP1-7 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 AL5809-20QP1-7?
For technical support, including AL5809-20QP1-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5809-20QP1-7 requirements.
6.How does Aetrix verify that AL5809-20QP1-7 is sourced from the original manufacturer or authorized distributors?
All AL5809-20QP1-7 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 AL5809-20QP1-7 meets industry standards.
7.What is the process for return or replacement of AL5809-20QP1-7?
All AL5809-20QP1-7 units undergo pre-shipment inspection (PSI). If there is an issue with AL5809-20QP1-7, 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 AL5809-20QP1-7 part is unused and in its original packaging.
Return procedure for AL5809-20QP1-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AL5809-20QP1-7 Tags
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