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Diodes Incorporated AL5809-50QP1-7
- Part No.:
- AL5809-50QP1-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- POWERDI®123
- Datasheet:
-
AL5809-50QP1-7.pdf
- Description:
- IC LED DRVR LIN PWM 50MA PDI123
- Quantity:
- Payment:
- Shipping:
Inventory:3,473
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Product details
Overview
AL5809-50QP1-7 from Diodes Incorporated is a two-terminal, AEC-Q100 Grade 1 qualified constant current linear LED driver delivering 50 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 AL5809-50QP1-7 datasheet, AL5809-50QP1-7 pinout, AL5809-50QP1-7 application, or AL5809-50QP1-7 equivalent, key selection considerations include its fixed 50 mA output, PowerDI123 (Type B) thermal performance (1.5 W max dissipation), 1.5 V turn-on threshold, and automotive-grade transient tolerance up to 80 V peak.
Technical Context
The AL5809-50QP1-7 integrates an internal precision current mirror and low-dropout regulator to maintain stable 50 mA output without external resistors. Its two-terminal architecture eliminates control pins, relying on voltage differential between IN and OUT to enable regulation once VINOUT exceeds ~1.5 V.
Thermal shutdown activates at +165°C with +30°C hysteresis, and it sustains operation across 2.5–60 V input while maintaining ±5% current accuracy over full temperature and voltage range - critical for unregulated automotive battery rails (9–16 V) driving LED strings with variable forward voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 50 mA ±5% at TA = +25°C; 44–56 mA over -40°C to +150°C - ensures consistent LED brightness across automotive ambient extremes. |
| Operating Voltage Range | 2.5 V to 60 V across terminals - supports direct connection to 12 V systems and withstands load-dump transients up to 80 V (absolute max). |
| Temperature Stability | 20 ppm/°C - limits current drift to <±0.3% over full junction range, enabling stable luminance without active compensation. |
| Turn-On Threshold | ~1.5 V (min 1 V, max 2 V) - enables reliable startup even under cold-cranking battery conditions (~9 V system). |
| Thermal Shutdown | +165°C activation with +30°C hysteresis - protects against thermal runaway during sustained high-power dissipation on minimal PCB copper. |
| Package Thermal Resistance | θJA = 81.4°C/W on 50.8 mm × 50.8 mm GETEK PCB - defines maximum ambient temperature for 1.5 W operation at TJ ≤ +150°C. |
| ESD Protection | HBM: 4 kV, MM: 400 V, CDM: 1 kV - meets automotive handling robustness requirements without additional protection circuitry. |
Pinout & Package
AL5809-50QP1-7 uses the PowerDI123 (Type B) surface-mount package: 3.7 mm × 2.8 mm × 1.78 mm body, single-row 2-pin configuration with exposed cathode pad for thermal conduction. Mounting requires minimum 10 mm × 10 mm 1 oz copper pad with thermal vias to ground plane for rated 1.5 W dissipation.
| 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 config or LED anode in high-side config - defines current direction and topology flexibility. |
| OUT (Pin 2) | LED current output terminal | Current flows out of this pin; connects to LED anode in low-side config or LED cathode in high-side config - completes current path with polarity-agnostic operation. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 50 mA output | Eliminates external current-setting resistor, reducing BOM count and layout area while guaranteeing ±5% accuracy without calibration. |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C ambient operation with PPAP support - satisfies Tier-1 automotive design and production traceability requirements. |
| High-side / low-side topology support | Enables placement either above or below LED string, simplifying routing in constrained instrument cluster or headlamp PCB layouts. |
| 1.5 V turn-on voltage | Ensures reliable LED activation during engine cranking when battery dips to ~9 V, avoiding flicker or dropout in safety-critical lighting. |
| 60 V operating / 80 V absolute max rating | Withstands ISO 7637-2 Pulse 1 (−150 V) and Pulse 5a (110 V) transients when used with appropriate clamping - reduces need for external TVS diodes. |
Applications
| Automotive Interior Lamps | Instrumentation Illumination |
|---|---|
Use Scenario: LED backlighting for HVAC control panels and door handle illumination in passenger cabins. IC Role / Device Role / Timing Role: Constant-current regulator providing stable 50 mA drive independent of 9–16 V battery variation and cabin temperature swings. Use Value: Maintains uniform LED brightness across -40°C winter start-up and +85°C summer cabin conditions without feedback loop or microcontroller intervention. |
Use Scenario: Analog gauge pointer illumination and digital display backlighting in vehicle instrument clusters. IC Role / Device Role / Timing Role: Two-terminal current source placed directly in series with LED strings, eliminating routing complexity near sensitive analog sensors. Use Value: Reduces EMI-sensitive analog section contamination by removing switching regulators or current-sense resistors near gauges. |
| Automotive Parking Lights | LED Marker Light Modules |
Use Scenario: Low-power front/rear parking lamp arrays requiring fail-safe dimming and thermal resilience. IC Role / Device Role / Timing Role: Linear current regulator enabling PWM dimming via external MOSFET switch on OUT pin, supporting 100–200 Hz duty-cycle control. Use Value: Achieves >95% dimming range with <500 µs minimum pulse width, meeting ECE R87 visibility requirements without audible coil whine. |
Use Scenario: Compact side-marker and corner-lamp modules where space and thermal mass are severely limited. IC Role / Device Role / Timing Role: High-thermal-efficiency current source using PowerDI123 (Type B) exposed pad for direct heatsinking to metal housing. Use Value: Delivers 50 mA continuously at +85°C ambient with only 10 mm² copper area - avoids costly ceramic substrates or active cooling. |
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 |
|---|---|---|---|
| AL5809-40QP1-7 | 40 mA ±5% output; same package, thermal specs, and AEC-Q100 Grade 1 qualification. | Lower drive current suits smaller LED arrays or lower-brightness indicators where 50 mA causes oversaturation or thermal margin loss. | Select when total LED string power must stay below 0.6 W at 13.5 V supply to avoid derating on standard FR-4. |
| AL5809-60QP1-7 | 60 mA ±5% output; identical pinout, thermal resistance, and 60 V operating range. | Higher current supports longer LED strings or higher-luminance emitters but increases power dissipation by 20% at same VINOUT. | Choose when driving 3–4 white LEDs in series at 12 V, requiring ≥55 mA to meet photometric output targets. |
Compared with AL5809-40QP1-7 and AL5809-60QP1-7, the AL5809-50QP1-7 provides optimal balance of luminous flux, thermal headroom, and efficiency for mid-range automotive indicator applications - avoiding unnecessary power waste while ensuring sufficient margin for aging and voltage drop.
Availability
AL5809-50QP1-7 is available at Aetrix Electronics and suitable for automotive interior lamps, instrumentation illumination, parking lights, and LED marker light modules requiring stable component supply with AEC-Q100 compliance and PPAP documentation support.
Supply support for AL5809-50QP1-7 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 drivers for automotive LED lighting, designed to replace resistor-based biasing with precision, thermal resilience, and topology flexibility in space-constrained modules.
FAQ
Can AL5809-50QP1-7 be used in high-side and low-side configurations?
Yes - the device operates identically in both topologies. For high-side use, connect the LED anode to OUT and cathode to the supply rail; for low-side, connect LED cathode to IN and anode to ground. The current direction is defined solely by terminal voltage polarity, not internal architecture.
What is the minimum PCB copper requirement to sustain 1.5 W dissipation?
To achieve the rated 1.5 W power dissipation at TJ ≤ +150°C, the device must be mounted on a 50.8 mm × 50.8 mm GETEK PCB with 25.4 mm × 25.4 mm copper pads and thermal vias. On standard FR-4 with 10 mm × 10 mm pad, max continuous power drops to 0.84 W per datasheet thermal data.
Does AL5809-50QP1-7 support PWM dimming without external components?
No - PWM dimming requires an external MOSFET switch controlled by the PWM signal. The device itself has no digital interface or enable pin; dimming is achieved by rapidly interrupting current flow through the OUT pin using an external FET, as shown in Figure 6a of the datasheet.
How does thermal shutdown behave during transient overloads?
Thermal shutdown activates at +165°C junction temperature with +30°C hysteresis, meaning recovery occurs at +135°C. During short overloads (e.g., 100 ms load dump), the device may cycle briefly but resumes regulation once temperature falls below recovery threshold - no latch-up or manual reset required.
AL5809-50QP1-7 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:
- 50mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
AL5809-50QP1-7 FAQ
1.How can I place an order for AL5809-50QP1-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL5809-50QP1-7 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 AL5809-50QP1-7 reliable?
The price and inventory of AL5809-50QP1-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5809-50QP1-7 is usually 5 days.
3.What payment methods are accepted for AL5809-50QP1-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5809-50QP1-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL5809-50QP1-7?
AL5809-50QP1-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL5809-50QP1-7 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 AL5809-50QP1-7?
For technical support, including AL5809-50QP1-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5809-50QP1-7 requirements.
6.How does Aetrix verify that AL5809-50QP1-7 is sourced from the original manufacturer or authorized distributors?
All AL5809-50QP1-7 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 AL5809-50QP1-7 meets industry standards.
7.What is the process for return or replacement of AL5809-50QP1-7?
All AL5809-50QP1-7 units undergo pre-shipment inspection (PSI). If there is an issue with AL5809-50QP1-7, 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 AL5809-50QP1-7 part is unused and in its original packaging.
Return procedure for AL5809-50QP1-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AL5809-50QP1-7 Tags
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