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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Diodes Incorporated AL1783QT16E-13

Name: AL1783QT16E-13
Brand: Diodes Incorporated
SKU: AL1783QT16E-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AL1783QT16E-13

Manufacturer:: Diodes Incorporated

Category:: LED Drivers

Package:: 16-TSSOP (0.173", 4.40mm Width) Exposed Pad

Datasheet:: AL1783QT16E-13.pdf

Description:: LED LINEAR DRIVER TSSOP-16EP T&R

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Product details

Overview

AL1783QT16E-13 from Diodes Incorporated is an AEC-Q100 Grade 1 qualified three-channel PWM linear LED driver for automotive lighting, supporting independent 125mA per channel (±4% tolerance), 6.5V–55V input voltage, and 40kHz PWM dimming with 10μs minimum on-time. It drives LED cathodes directly via LED1/LED2/LED3 pins and integrates UVLO, OTP, LED open/short protection with FAULTB reporting.

For engineers reviewing the AL1783QT16E-13 datasheet, AL1783QT16E-13 pinout, AL1783QT16E-13 application, or AL1783QT16E-13 equivalent, key selection criteria include channel current matching accuracy, thermal foldback behavior, fault reporting timing (e.g., 128ms hiccup recovery), standby current (<180µA), and TSSOP-16EP thermal resistance (θJA = 45°C/W).

Technical Context

The AL1783QT16E-13 implements a three-channel linear current sink architecture with independent reference voltage (1.5V ±1.5%) inputs (REF1–REF3) and PWM-controlled enable logic per channel. Each channel features internal 200kΩ pulldown on PWM1–PWM3 and supports deep dimming down to 1% duty cycle at 1kHz.

Its protection system includes hysteresis-based UVLO (6.0V turn-on, 300mV hysteresis), LED short detection at 15V threshold with 7-cycle PWM deglitching, and thermal shutdown at +160°C with automatic +140°C recovery. Fault status is reported via open-drain FAULTB with <180mV low-level output at 1mA.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	6.5V to 55V - supports 12V/24V/48V automotive battery systems with headroom for load dump transients.
LED Channel Current	30mA to 250mA per channel - set externally via RREF (e.g., 48kΩ → 125mA, 24kΩ → 250mA) with ±4% tolerance at 125mA.
PWM Frequency Support	0.5kHz to 40kHz - enables flicker-free dimming and avoids audible noise while maintaining 10μs minimum on-time.
Standby Current	80–180µA - entered automatically when all PWM inputs held low >4ms; reduces system power during熄灭 states.
Thermal Protection	+160°C shutdown / +140°C recovery - uses thermal foldback before shutdown to sustain partial operation under overload.
Fault Reporting	Open-drain FAULTB with <180mV VOL @ 1mA - supports wired-OR of multiple devices using single pullup resistor.
Ambient Temp Range	−40°C to +125°C - validated for under-hood and exterior lighting environments per AEC-Q100 Grade 1.

Pinout & Package

TSSOP-16EP package with exposed thermal pad (must be connected to GND for θJA = 45°C/W); 5mm × 4.4mm footprint, 1mm height, 0.65mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 1)	Power supply input	Accepts 6.5–55V; powers internal regulator and supplies current sinks; includes 6.0V UVLO with 300mV hysteresis.
PWM1–PWM3 (Pins 3,4,5)	Digital enable/dimming inputs	Active-high; internally pulled down (200kΩ); >1.4V enables channel; <0.4V disables; >4ms low triggers standby mode.
GND (Pins 6,7,8)	Ground reference	Three dedicated ground pins minimize IR drop and improve current matching between channels.
LED1–LED3 (Pins 9,10,11)	Current sink outputs	Drive LED string cathodes; support up to 250mA each; V_LED regulation down to 0.7V at 125mA.
FAULTB (Pin 13)	Fault status output	Open-drain active-low; asserts for UVLO, OTP, LED open/short; requires external pullup resistor.
REF1–REF3 (Pins 14,15,16)	Current setting references	1.5V nominal reference; sets channel current as I_LED = 4000 × V_REF/R_REF; tolerance ±1.5% over temperature.
EP (Exposed Pad)	Thermal interface	Must be soldered to PCB GND plane with ≥4 thermal vias; not for electrical conduction; reduces θJC to 10°C/W.

Key Features

Feature	Design Value
Independent per-channel PWM control	Enables RGB color mixing or asymmetric brightness tuning without cross-channel interference or shared timing constraints.
Automated standby entry/exit	Eliminates need for MCU firmware coordination: standby activates after 4ms of low PWM and exits instantly on first high edge.
LED open/short hiccup protection	Shuts down affected channel for 128ms then auto-recovers - prevents latch-up while enabling fault diagnostics in production test.
Robust thermal management	Combines thermal foldback (gradual current reduction), shutdown (+160°C), and automatic recovery (+140°C) to maximize uptime.
Bus-mode fault reporting	Multiple AL1783QT16E-13 devices can share one FAULTB line with single pullup - simplifies fault monitoring in multi-lamp modules.

Applications

Daytime Running Lights (DRL)

Rear Combination Lamps

Use Scenario: High-brightness, always-on front lighting meeting ECE R87 photometric requirements.

IC Role / Device Role / Timing Role: Three-channel current sink driving white LED strings with synchronized PWM dimming for adaptive intensity control.

Use Value: ±4% current matching ensures uniform luminance across DRL segments; 55V rating handles cold-crank transients without derating.

Use Scenario: Integrated stop/tail/position/turn signal module requiring independent brightness and fault isolation per function.

IC Role / Device Role / Timing Role: Dedicated channel per LED string (e.g., LED1=stop, LED2=tail, LED3=turn), each with separate PWM and REF.

Use Value: FAULTB reporting enables lamp-out detection per function; hiccup-mode protection prevents total lamp failure during LED open events.

Fog Lights

Interior Ambient Lighting

Use Scenario: High-current, thermally demanding forward-facing lamps operating in humid, high-vibration environments.

IC Role / Device Role / Timing Role: Linear current sink with thermal foldback and shutdown, driving parallel LED strings via LED1+LED2 tie.

Use Value: θJA = 45°C/W and exposed pad grounding enable stable 250mA/channel operation without external heatsink.

Use Scenario: Soft-color-tunable cabin lighting with smooth dimming and low-noise operation.

IC Role / Device Role / Timing Role: RGB channel driver accepting MCU-generated 40kHz PWM signals for flicker-free 1%–100% dimming.

Use Value: 10μs minimum PWM on-time and 40kHz max frequency eliminate visible stepping and audible coil whine.

Equivalent & Alternatives

The following parts are listed as comparable options for similar three-channel automotive LED driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL8863QT16E-13	Switching buck-boost LED driver; higher efficiency (>90%), but larger solution size and EMI filtering required.	Better suited for high-power (>5W/channel) or thermally constrained modules where heat dissipation is critical.	Select when input voltage varies widely (4.5–60V) and efficiency >85% is mandatory; avoid if board space or EMI sensitivity is limiting.
ASL3416SHN	High-side switch-based linear driver; supports up to 350mA/channel; integrated diagnostics but no REF pin flexibility.	Targeted at rear lamp clusters with built-in CAN FD communication and ASAM-compliant diagnostics.	Choose for OEM programs requiring ISO 14229 UDS diagnostics or functional safety (ASIL-B capable); not drop-in compatible.

Compared with AL8863QT16E-13, the AL1783QT16E-13 offers smaller footprint and simpler layout at the cost of lower efficiency; versus ASL3416SHN, it provides finer analog current tuning via REF resistors but lacks embedded diagnostics and safety certification.

Availability

AL1783QT16E-13 is available at Aetrix Electronics and suitable for automotive daytime running lights, rear combination lamps, fog lights, and interior ambient lighting requiring stable component supply across extended temperature ranges and AEC-Q100 compliance.

Supply support for AL1783QT16E-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 manufacturer specializing in discrete, analog, and mixed-signal ICs for automotive, industrial, and consumer markets, with IATF 16949-certified manufacturing facilities.

The AL1783QT16E-13 belongs to Diodes' automotive-grade linear LED driver product line, designed specifically for cost-sensitive, space-constrained exterior and interior lighting modules requiring precise current matching and robust fault handling.

FAQ

What is the maximum continuous current per channel, and how is it set?

The AL1783QT16E-13 supports up to 250mA per channel, set by external resistors on REF1–REF3 pins using the formula I_LED = 4000 × V_REF/R_REF, where V_REF = 1.5V nominal. A 24kΩ resistor yields 250mA; 48kΩ yields 125mA. Current tolerance is ±4% at 125mA and full temperature range.

How does the FAULTB pin behave during different fault conditions?

FAULTB asserts low for UVLO (VIN <5.7V), OTP (>160°C), LED open (7 consecutive PWM cycles with no current), and LED short (V_LED >15V for 3ms). It remains low until fault clears and device recovers; hiccup mode applies 128ms off-time for open/short faults before retry.

Can multiple AL1783QT16E-13 devices be synchronized for higher current or redundancy?

Yes - PWM1–PWM3 pins can be tied together across devices for synchronized dimming, and FAULTB outputs can be wired-OR'd with one pullup resistor. LED1–LED3 pins from two devices may also be paralleled per channel to double current (e.g., 500mA), provided thermal design accommodates increased power dissipation.

What is the soft-start behavior, and why is it important?

Soft-start activates on VIN ramp-up with any PWM high, limiting LED current slew rate over 200μs to prevent overshoot and stress on LED junctions. This protects against inrush-induced degradation in high-reliability automotive lighting, especially during cold-crank or hot-plug scenarios.

AL1783QT16E-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:: -

Internal Switch(s):: Yes

Number of Outputs:: 3

Voltage - Supply (Min):: 6.5V

Voltage - Supply (Max):: 55V

Voltage - Output:: -

Current - Output / Channel:: 300mA

Frequency:: -

Dimming:: PWM

Applications:: LED Lighting

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 16-TSSOP-EP

AL1783QT16E-13 FAQ

1.How can I place an order for AL1783QT16E-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AL1783QT16E-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 AL1783QT16E-13 reliable?

The price and inventory of AL1783QT16E-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL1783QT16E-13 is usually 5 days.

3.What payment methods are accepted for AL1783QT16E-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL1783QT16E-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AL1783QT16E-13?

AL1783QT16E-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AL1783QT16E-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 AL1783QT16E-13?

For technical support, including AL1783QT16E-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL1783QT16E-13 requirements.

6.How does Aetrix verify that AL1783QT16E-13 is sourced from the original manufacturer or authorized distributors?

All AL1783QT16E-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 AL1783QT16E-13 meets industry standards.

7.What is the process for return or replacement of AL1783QT16E-13?

All AL1783QT16E-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL1783QT16E-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 AL1783QT16E-13 part is unused and in its original packaging.

Return procedure for AL1783QT16E-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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