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Diodes Incorporated AL5816QW5-7
- Part No.:
- AL5816QW5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AL5816QW5-7.pdf
- Description:
- IC LED DRVR LIN PWM 15MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:14,390
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Product details
Overview
AL5816QW5-7 from Diodes Incorporated is an automotive-grade 5-pin linear LED controller IC that regulates constant current for medium-to-high-power LED strings via external bipolar or MOSFET pass devices. It operates from 4.5V to 60V input, features a precise 200mV feedback reference (±5% tolerance), delivers up to 15mA output drive, supports PWM dimming >200Hz, and is qualified to AEC-Q100 Grade 1 for rear lamp and instrumentation illumination.
For engineers reviewing the AL5816QW5-7 datasheet, AL5816QW5-7 pinout, AL5816QW5-7 application, or AL5816QW5-7 equivalent, key selection criteria include its 0.2V FB threshold for low-loss current sensing, SOT25 automotive package, internal thermal shutdown at +160°C, UVLO at 4.2V, and ability to drive multi-channel LED strings with matched sense resistors.
Technical Context
The AL5816QW5-7 implements a precision voltage-controlled current regulator using an internal error amplifier with 50kHz bandwidth and 5A/V transconductance. Its feedback loop maintains 200mV across the external sense resistor (RS), enabling LED current calculation as ILED = 0.2V / RS. The OUT pin sources up to –15mA to bias external NPN or NMOS transistors.
It integrates under-voltage lockout (4.2V rising threshold), over-temperature shutdown (+160°C trip with +30°C hysteresis), and PWM-compatible digital dimming control. The device requires no external compensation components due to internal loop stabilization and supports parallel LED string operation when matched transistors and sense resistors are used.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - Enables direct connection to automotive battery rails including cold-crank (6V) and load-dump (60V) conditions. |
| Feedback Reference Voltage | 0.2V ±5% - Minimizes power loss in sense resistor; enables use of standard 1/4W resistors for ≤250mA LED currents. |
| OUT Pin Drive Capability | –15mA max source current at VOUT = 1V - Sufficient to fully saturate small-signal NPN transistors or drive gate capacitance of logic-level NMOS FETs. |
| PWM Dimming Frequency | >200Hz - Supports flicker-free dimming without visible artifacts in automotive interior and position lamps. |
| Thermal Shutdown Threshold | +160°C with +30°C hysteresis - Protects IC and external transistor during sustained high-power operation or poor PCB thermal design. |
| UVLO Threshold | 4.2V (rising), 3.85V (falling) - Prevents erratic startup during battery brownout while allowing operation down to nominal 12V system voltage. |
| Junction Temperature Range | –40°C to +150°C - Matches automotive under-hood and cabin ambient requirements per AEC-Q100 Grade 1. |
Pinout & Package
AL5816QW5-7 is housed in a RoHS-compliant, halogen-free SOT25 (SC-74A) surface-mount package with exposed pad for enhanced thermal performance. Thermal resistance is θJA = 160°C/W on 1″×1″ FR-4 board with 2oz copper and no thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PWM | Digital dimming control input | Accepts 2.7–60V logic-high signal; internal 15µA pull-up enables open-drain PWM driver interface; 2µs turn-on/off delay ensures clean edge response. |
| 2 - GND | Analog and power ground reference | Common return path for FB sense voltage, OUT current sink, and internal regulator - must be low-impedance and separated from high-current LED return paths. |
| 3 - FB | Current sense feedback input | Regulates external sense resistor voltage to 0.2V; input bias current ≤–125nA minimizes error contribution from RS tolerance and layout parasitics. |
| 4 - OUT | External transistor drive output | Sources up to –15mA to base/gate of external BJT/MOSFET; clamped to ≤3V for safe transistor biasing; supports multi-string configurations with shared FB node. |
| 5 - VCC | Main supply input | Accepts 4.5–60V; draws 10.25mA typical supply current at 12V/10mA load; includes internal UVLO and thermal protection circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications operating from –40°C to +125°C ambient, with PPAP documentation support. |
| Low 200mV FB reference | Reduces sense resistor power dissipation by >80% vs. conventional 1V references - critical for thermally constrained lamp housings. |
| Integrated thermal shutdown | Auto-recovery at +130°C after +160°C trip - prevents permanent damage during transient overload or inadequate heatsinking. |
| PWM dimming compatibility | Supports duty-cycle-based brightness control without analog current modulation - eliminates color shift in white LEDs. |
| No external compensation required | Internally compensated error amplifier eliminates need for external capacitors or resistors - reduces BOM count and layout sensitivity. |
Applications
| Automotive Rear Lamps | Automotive Interior Lamps |
|---|---|
|
Use Scenario: Constant-current driving of red LED arrays in stop/tail lamp modules subject to wide battery voltage swings and thermal cycling. IC Role / Device Role / Timing Role: Linear LED controller regulating current through external MOSFETs; provides stable light output independent of input voltage or LED forward voltage drift. Use Value: Maintains consistent luminous intensity across –40°C to +85°C ambient and 6–16V supply range, meeting ECE R87 photometric stability requirements. |
Use Scenario: Dimmable ambient lighting in door panels, footwells, and center consoles using warm-white LED strings. IC Role / Device Role / Timing Role: PWM-controlled current regulator interfacing with vehicle body control module (BCM) dimming signals. Use Value: Delivers flicker-free dimming down to 1% duty cycle at 500Hz, satisfying OEM interior lighting comfort specifications. |
| Automotive Instrumentation Illumination | Automotive License Plate Illumination |
|
Use Scenario: Backlighting of TFT-LCD instrument clusters requiring precise, stable current for uniform brightness and color consistency. IC Role / Device Role / Timing Role: High-accuracy current source controlling parallel LED strings behind diffuser films; referenced to 0.2V FB for minimal thermal drift. Use Value: Achieves <±3% current matching across channels at +105°C junction temperature, ensuring display uniformity over lifetime. |
Use Scenario: Compact, thermally efficient illumination of license plate area in rear bumper assemblies with limited PCB space. IC Role / Device Role / Timing Role: Low-dropout linear controller driving single high-brightness LED via external BJT in SOT25 footprint. Use Value: Enables full 250mA LED drive in <25mm² PCB area with only 0.05W sense resistor dissipation - avoids need for active cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL5816QW5-13 | Same die, different tape-and-reel quantity (10,000 pcs vs. 3,000 pcs); identical electrical specs and qualification. | No functional difference - selected for volume production vs. prototyping or low-MOQ procurement. | Choose W5-13 for high-volume automotive Tier-1 programs requiring extended reel continuity and reduced handling cost per unit. |
| AL5816QW5-7T | Same SOT25 package and AEC-Q100 Grade 1 qualification; differs only in marking code and traceability format (no functional variation). | Used in applications requiring full lot traceability per IATF 16949; same thermal and electrical behavior as W5-7. | Select W5-7T when full material traceability, PPAP submission support, and serial-number-level quality records are mandatory. |
Compared with AL5816QW5-13 and AL5816QW5-7T, the AL5816QW5-7 offers identical performance and qualification but is optimized for mid-volume sampling, engineering validation, and pilot builds where 3,000-unit reels align with evaluation board assembly and initial qualification testing cycles.
Availability
AL5816QW5-7 is available at Aetrix Electronics and suitable for automotive rear lamps, instrumentation backlighting, and license plate illumination requiring stable component supply, AEC-Q100 compliance, and SOT25 footprint compatibility.
Supply support for AL5816QW5-7 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 integrated circuits, specializing in high-reliability power management, signal integrity, and automotive-qualified solutions.
The AL5816Q belongs to Diodes' automotive LED driver product line, designed specifically for constant-current control of exterior and interior lighting systems under harsh automotive environmental and regulatory conditions.
FAQ
What is the maximum LED string voltage supported by AL5816QW5-7?
The AL5816QW5-7 does not directly drive LEDs - it controls external transistors. The maximum LED string voltage equals VCC minus the transistor's saturation voltage and the 0.2V sense drop. With VCC = 60V and a well-biased MOSFET (VDS,on ≈ 0.1V), up to 59.7V LED string voltage is feasible, provided thermal limits are observed.
Can AL5816QW5-7 drive multiple LED strings without current mismatch?
Yes - when configured with matched external transistors and identical sense resistors tied to a common FB node, the AL5816QW5-7 achieves ≤5% current matching across strings. This relies on the 0.2V reference accuracy and low FB input bias current (≤–125nA), minimizing resistor tolerance and layout-induced errors.
Is external compensation required for stable operation?
No. The AL5816QW5-7 integrates full internal compensation for its error amplifier. No external capacitors or resistors are needed in the feedback path, simplifying layout and eliminating tuning dependencies on PCB parasitics or temperature drift.
What thermal derating applies above 125°C ambient?
The device is rated for +125°C ambient (TA) and +150°C junction (TJ). At TA = +125°C, maximum allowable power dissipation drops to ~0.31W (using θJA = 160°C/W). Derating is linear: every 1°C rise in TA reduces usable power by ~1.94mW until TJ reaches +150°C.
AL5816QW5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 60V
- Voltage - Output:
- 3V
- Current - Output / Channel:
- 15mA
- Frequency:
- 50kHz
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AL5816QW5-7 FAQ
1.How can I place an order for AL5816QW5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL5816QW5-7 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 AL5816QW5-7 reliable?
The price and inventory of AL5816QW5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5816QW5-7 is usually 5 days.
3.What payment methods are accepted for AL5816QW5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5816QW5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL5816QW5-7?
AL5816QW5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL5816QW5-7 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 AL5816QW5-7?
For technical support, including AL5816QW5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5816QW5-7 requirements.
6.How does Aetrix verify that AL5816QW5-7 is sourced from the original manufacturer or authorized distributors?
All AL5816QW5-7 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 AL5816QW5-7 meets industry standards.
7.What is the process for return or replacement of AL5816QW5-7?
All AL5816QW5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AL5816QW5-7, 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 AL5816QW5-7 part is unused and in its original packaging.
Return procedure for AL5816QW5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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