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Diodes Incorporated AL5871T16E-13
- Part No.:
- AL5871T16E-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
AL5871T16E-13.pdf
- Description:
- LED LINEAR DRIVER TSSOP-16EP T&R
- Quantity:
- Payment:
- Shipping:
Inventory:1,991
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Product details
Overview
AL5871T16E-13 from Diodes Incorporated is a single-channel linear LED driver IC designed for constant-current LED string control in automotive and industrial lighting. It delivers up to 750mA output current with ±4% regulation accuracy, supports PWM and analog dimming (0.3–1.5V ADIM), and integrates UVLO, LED open/short detection, and overtemperature protection (OTP) with thermal foldback. Used in dome lights, rear lamps, and charging inlet indicators.
For engineers reviewing the AL5871T16E-13 datasheet, AL5871T16E-13 pinout, AL5871T16E-13 application, or AL5871T16E-13 equivalent, key selection criteria include input voltage range (5–55V), fault reporting via FAULTB, DEN-configurable thermal foldback, and TSSOP-16EP package thermal performance (θJC = 3.4°C/W).
Technical Context
The AL5871T16E-13 employs a precision bandgap-based current reference (VREF = 1.47–1.53V) and low-dropout current sink architecture to regulate LED current independent of forward voltage variation. Its PWM control path features internal pulldown and 0.2–1kHz recommended frequency range for flicker-free dimming.
Thermal management combines two distinct mechanisms: programmable thermal foldback (enabled via DEN >0.3V) that linearly reduces ILED above +135°C, and hard OTP shutdown at +160°C with automatic recovery at +130°C. Fault conditions-including UVLO, LED open, LED short, and OTP-are consolidated on the open-drain FAULTB pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 55V - supports wide-range automotive battery and industrial DC supplies without external pre-regulation. |
| Max Output Current | 750mA - sufficient for high-brightness single-string LED applications such as CHMSL or door handle illumination. |
| Current Accuracy | ±4% - ensures consistent luminance across units and temperature (-40°C to +105°C ambient). |
| PWM Dimming Frequency | 0.2–1 kHz - optimized for human-eye perception with minimal audible noise and no visible flicker. |
| Analog Dimming Range | 0.3V–1.5V on ADIM pin - enables smooth 0–100% linear brightness control without PWM switching artifacts. |
| Fault Reporting | Open-drain FAULTB pin - asserts low for UVLO, OTP, LED open, or LED short; simplifies system-level diagnostics. |
| Thermal Resistance | θJC = 3.4°C/W - enables efficient heat transfer from die to exposed pad, critical for sustained 750mA operation. |
Pinout & Package
TSSOP-16EP (Type DX) package with exposed thermal pad internally connected to GND; requires external connection to PCB ground plane and thermal vias for optimal thermal performance (θJA = 42.7°C/W on 2"×2" FR-4, 2oz Cu).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power supply input | Accepts 5–55V DC; includes UVLO (4.75–5.25V threshold) and hysteresis (300mV) for stable startup. |
| PWM (Pin 3) | Digital dimming control | Active-high logic input (VIH ≥1.4V); automatically enters/exits standby mode when held low >25ms. |
| GND (Pin 6) | Reference ground | Common return for power, analog, and fault circuits; connects to exposed pad for thermal conduction. |
| LED (Pin 11) | Current sink output | Drives LED cathode; supports low dropout (VLED_REG = 0.2V @ 125mA) for high-efficiency operation. |
| DEN (Pin 13) | Diagnostic enable | Configures LED open detection (≥1.2V) and thermal foldback (≥0.3V); disables both when <0.2V. |
| REF (Pin 14) | Current setting reference | Connects external resistor (e.g., 24kΩ → 750mA); sets ILED via ILEDX = 12000 × VREF / RREF (VREF = 1.5V typ). |
| ADIM (Pin 15) | Analog dimming input | DC voltage-controlled brightness (0.3–1.5V = 0–100% ILED); shuts off LED below 0.15V. |
| FAULTB (Pin 16) | Fault status output | Open-drain active-low signal reporting UVLO, OTP, LED open, or LED short; pulled high externally. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Standby Mode | Enters ultra-low-quiescent state (300µA) when PWM remains low >25ms-no enable pin required. |
| Thermal Foldback | Reduces ILED linearly above +135°C (down to 50% at +160°C), preventing thermal runaway without full shutdown. |
| Multi-Fault Protection | Detects and reports UVLO, LED open, LED short, and OTP on single FAULTB pin-reduces system BOM count. |
| Low-Dropout Operation | Maintains regulation with only 0.2V headroom at 125mA-enables use with low-Vf LEDs or high-string-count designs. |
| Dimming Flexibility | Supports simultaneous PWM (digital) and ADIM (analog) control-allows hybrid dimming schemes for EMI-sensitive zones. |
Applications
| Interior Dome Lighting | Rear Lamp Assembly |
|---|---|
|
Use Scenario: Constant-current drive for white LED strings in vehicle cabin dome lights with soft-start and fade-out. IC Role / Device Role / Timing Role: Single-channel linear current sink regulating 350–750mA; handles analog dimming via vehicle CAN bus DAC output. Use Value: Eliminates need for external current-sense resistors and provides fault visibility (FAULTB) for OEM diagnostic compliance. |
Use Scenario: CHMSL (center high-mounted stop lamp) requiring AEC-Q100-compliant current stability under battery transients. IC Role / Device Role / Timing Role: LED driver with UVLO hysteresis (300mV) and thermal foldback to maintain brightness during brake-light thermal soak. Use Value: Ensures consistent luminance across -40°C to +105°C ambient while meeting SAE J575 EMI limits via analog dimming. |
| Charging Inlet Indicator | Door Handle Illumination |
|
Use Scenario: Low-power status indicator (single red/blue LED) activated during EV charging sequence. IC Role / Device Role / Timing Role: Standby-mode-capable driver entering <300µA sleep when vehicle is off; wakes on PWM pulse from body controller. Use Value: Meets ISO 16750-2 quiescent current requirements for always-on vehicle interfaces without auxiliary LDO. |
Use Scenario: Ambient lighting strip along vehicle door handle with localized brightness control per segment. IC Role / Device Role / Timing Role: High-accuracy (±4%) current regulator enabling uniform color point across multiple AL5871 units in parallel layout. Use Value: Avoids binning compensation by matching ILED tolerance, reducing calibration overhead in mass production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL5873T16E-13 | Dual-channel version with identical pinout and protection suite; shares same REF/ADIM/PWM interface but adds second LED channel. | Used where space-constrained dual-zone lighting (e.g., front/rear map light) replaces separate single-channel drivers. | Select when needing two independently dimmable strings without doubling PCB area or thermal footprint. |
| AL8861Q-7 | Automotive-grade (AEC-Q100 Grade 1) buck LED driver with 1.5A capability; requires external inductor and offers higher efficiency at >12V input. | Suitable for high-power rear combination lamps where thermal dissipation exceeds linear driver limits. | Choose for >1A loads or systems prioritizing >90% efficiency over simplicity and EMI profile. |
Compared with AL5873T16E-13, AL5871T16E-13 saves board space and cost in single-string applications; versus AL8861Q-7, it eliminates inductor BOM, reduces EMI filtering needs, and simplifies layout-but trades off efficiency above 24V input.
Availability
AL5871T16E-13 is available at Aetrix Electronics and suitable for interior lighting, exterior signaling, and EV charging interface applications requiring stable component supply, automotive-grade reliability, and RoHS-compliant packaging.
Supply support for AL5871T16E-13 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 company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets.
The AL5871 belongs to Diodes' automotive-qualified linear LED driver product line, engineered specifically for robustness in vehicle lighting systems with integrated diagnostics and thermal resilience.
FAQ
What is the minimum input voltage required for AL5871T16E-13 to operate?
The AL5871T16E-13 requires a minimum input voltage of 5.0V to exit undervoltage lockout (UVLO), with a hysteresis of 300mV ensuring stable turn-on above 5.25V and turn-off below 4.75V. Operation below 4.75V disables all functions and asserts FAULTB low.
How does the DEN pin affect LED open-circuit detection?
The DEN pin enables or disables LED open detection: when VDEN ≥1.2V, open detection is active and triggers FAULTB after 7 consecutive PWM cycles or 5ms; when VDEN ≤1.1V, detection is disabled to prevent false faults during low-dropout operation where LED voltage approaches regulation limit.
Can AL5871T16E-13 be used without PWM control?
Yes-AL5871T16E-13 supports standalone analog dimming via the ADIM pin (0.3–1.5V), delivering fully linear 0–100% LED current control without any PWM signal. The device remains active as long as VIN is within operating range and PWM is held high or floating (internally pulled down).
What thermal design practices are recommended for 750mA operation?
For continuous 750mA operation, mount the TSSOP-16EP exposed pad directly to a 2oz copper ground plane with ≥6 thermal vias (0.3mm diameter, 0.8mm pitch) connecting to inner/outer layers. Maintain θJA ≤42.7°C/W per datasheet test board; derate ILED by 1.25mA/°C above +105°C ambient.
AL5871T16E-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Constant Current
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 5V
- Voltage - Supply (Max):
- 55V
- Voltage - Output:
- -
- Current - Output / Channel:
- 750mA
- Frequency:
- 200Hz ~ 1kHz
- Dimming:
- Analog, PWM
- Applications:
- General Purpose
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP (Type DX)
AL5871T16E-13 FAQ
1.How can I place an order for AL5871T16E-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL5871T16E-13 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 AL5871T16E-13 reliable?
The price and inventory of AL5871T16E-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5871T16E-13 is usually 5 days.
3.What payment methods are accepted for AL5871T16E-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5871T16E-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL5871T16E-13?
AL5871T16E-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL5871T16E-13 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 AL5871T16E-13?
For technical support, including AL5871T16E-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5871T16E-13 requirements.
6.How does Aetrix verify that AL5871T16E-13 is sourced from the original manufacturer or authorized distributors?
All AL5871T16E-13 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 AL5871T16E-13 meets industry standards.
7.What is the process for return or replacement of AL5871T16E-13?
All AL5871T16E-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL5871T16E-13, 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 AL5871T16E-13 part is unused and in its original packaging.
Return procedure for AL5871T16E-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AL5871T16E-13 Tags
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