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Diodes Incorporated AL3066S16-13
- Part No.:
- AL3066S16-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AL3066S16-13.pdf
- Description:
- IC LED DRVR CTRLR PWM 250MA 16SO
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AL3066S16-13 from Diodes Incorporated is a four-channel boost LED driver IC designed for WLED backlight systems in LCD displays. It operates from 4.5V to 33V input, delivers up to 400mA per channel with ±1.5% typical current matching, supports 0.1–1MHz adjustable switching frequency, and integrates dual dimming modes (direct PWM and PWM-to-analog) with 1/10,000 minimum duty cycle at 100Hz.
For engineers reviewing the AL3066S16-13 datasheet, AL3066S16-13 pinout, AL3066S16-13 application, or AL3066S16-13 equivalent, this device is selected for high-precision multi-string LED biasing where tight current matching, robust fault protection (OVP, OTP, LED open/short, Schottky/inductor short), and flexible dimming control are required in space-constrained SO-16 designs.
Technical Context
The AL3066 employs a current-mode boost controller architecture with integrated 10V HVCC and 5V VCC linear regulators to drive external N-MOSFETs. Its four independent current-sink channels (CH1–CH4) each regulate LED string current via feedback from the ISET pin reference and internal 540mV current-sense threshold on the CS pin.
It implements dual dimming paths: DIM pin enables direct PWM control of gate drive timing, while DIM_ISET accepts PWM to modulate the ISET reference voltage through an internal low-pass filter-enabling analog-like dimming without external RC networks. Protection logic prioritizes OVP and LED open detection over short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 33V - supports wide-range industrial and automotive DC supplies without pre-regulation. |
| Max Output Current / Channel | 400mA - enables driving high-brightness WLED strings or paralleling channels for >400mA loads. |
| Current Matching (typ.) | ±1.5% - ensures uniform brightness across 4 display zones without per-string calibration. |
| Switching Frequency Range | 0.1MHz to 1MHz - allows trade-off between small magnetics (high-freq) and low conduction loss (low-freq). |
| PWM Dimming Min Duty Cycle | 1/10,000 at 100Hz - delivers >4-decade dimming range for HDR backlight control. |
| OVP Threshold | 2.0V (±0.1V) - sets precise output overvoltage cutoff via external resistor divider on OVP pin. |
| Thermal Shutdown | +160°C (±5°C) - latches off during sustained overload; resumes after cooling to +130°C. |
Pinout & Package
AL3066S16-13 is housed in a standard SO-16 (Small Outline, 16-pin) package with 1.27mm pitch, 10.0mm × 6.1mm body size, and exposed thermal pad (not electrically connected). The package supports reflow soldering per JEDEC J-STD-020 and has θJA = 79°C/W on 2″×2″ 2oz FR-4 PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CH4) | LED current sink 4 | Drives fourth WLED string; left open if unused - triggers open-LED protection automatically. |
| 2 (ISET) | Current reference set input | Connects to GND via RISET resistor to program all 4 channels' max current (e.g., 12kΩ → 100mA). |
| 3 (OVP) | Overvoltage sense input | Monitors output via resistor divider; trips shutdown when voltage ≥2.0V (hysteresis = 200mV). |
| 4 (RT) | Frequency programming input | Connects to GND via RT resistor to set switching frequency (e.g., 100kΩ → 500kHz). |
| 5 (CS) | Current sense input | Inputs MOSFET source voltage; compares to 540mV threshold for cycle-by-cycle OCP. |
| 6 (OUT) | Gate drive output | Delivers 10V logic-level signal to drive external N-MOSFET switch (not internal FET). |
| 7 (VCC) | 5V LDO output | Supplies internal circuitry; requires ≥10µF ceramic bypass to GND for stability. |
| 8 (HVCC) | 10V LDO output | Provides gate drive voltage; bypassed with ≥2.2µF ceramic capacitor to GND. |
| 9 (VIN) | Main power input | Accepts 4.5–33V; requires local 10µF ceramic input capacitor for ripple suppression. |
| 10 (DIM_ISET) | PWM-to-analog dimming enable | Accepts PWM input (10–100kHz) to modulate ISET reference voltage via internal LPF. |
| 11 (COMP) | Loop compensation node | Connects external RC network to stabilize current regulation loop bandwidth and phase margin. |
| 12 (DIM) | Direct PWM dimming input | Accepts external PWM (0.1–25kHz); controls ON/OFF state of all enabled channels synchronously. |
| 13 (CH1) | LED current sink 1 | Primary WLED string output; supports up to 400mA continuous or 400mA pulse current. |
| 14 (CH2) | LED current sink 2 | Second independent current sink; matches CH1 current within ±1.5% (typical). |
| 15 (GND) | Analog/digital ground | Common return for VIN, CS, ISET, OVP, RT, COMP, DIM, DIM_ISET; must be low-impedance. |
| 16 (CH3) | LED current sink 3 | Third WLED string output; can be disabled by floating or pulling above 5.4V (LED short threshold). |
Key Features
| Feature | Design Value |
|---|---|
| Four independent current sinks | Enables simultaneous driving of 4 discrete WLED strings with individual open/short protection per channel. |
| Dual dimming architecture | Supports both direct PWM (preserves color fidelity) and PWM-to-analog (reduces EMI/noise) without external DACs. |
| Programmable OVP with 200mV hysteresis | Prevents damage from feedback divider failure or open-loop conditions while avoiding nuisance tripping. |
| Schottky diode/inductor short protection | Detects CS voltage >800mV for >16 clock cycles - protects against catastrophic failures in boost path components. |
| ±1.5% typical current matching | Eliminates need for per-string current trimming in LCD backlight modules targeting uniform luminance. |
| 4kV HBM ESD rating | Ensures robustness during board assembly and field operation in unshielded display enclosures. |
Applications
| LCD Monitor Backlight | LCD Display Module |
|---|---|
|
Use Scenario: Driving 4-zone edge-lit WLED arrays in 24-inch desktop monitors requiring flicker-free dimming and uniform brightness. IC Role / Device Role / Timing Role: Four-channel current source controlling LED string current with synchronized PWM dimming across all zones. Use Value: ±1.5% current matching ensures <1% luminance variation between zones; 1/10,000 dimming duty enables smooth 10-bit+ grayscale rendering. |
Use Scenario: Compact embedded display module for industrial HMIs with limited PCB area and no dedicated backlight controller MCU. IC Role / Device Role / Timing Role: Standalone boost LED driver providing regulated current and dual-dimming interface (DIM + DIM_ISET) for host microcontroller. Use Value: Integrated HVCC/VCC regulators eliminate need for external LDOs; SO-16 footprint fits tight layout constraints. |
| LCD TV Backlight | Automotive Infotainment Display |
|
Use Scenario: Full-array local dimming (FALD) backlight unit using 4 parallel LED strings per zone in 43-inch TVs. IC Role / Device Role / Timing Role: High-current boost controller delivering up to 400mA per string with programmable OVP for safety-critical output regulation. Use Value: 33V max input accommodates 24V system rails; OVP latch-off at 3.2V provides secondary overvoltage fail-safe beyond primary 2.0V threshold. |
Use Scenario: Dashboard cluster display operating from 9–16V automotive battery with transient immunity and thermal resilience. IC Role / Device Role / Timing Role: LED driver with UVLO (4.0V turn-on), OTP (+160°C shutdown), and robust ESD (4kV HBM) for harsh vehicle environments. Use Value: Wide 4.5–33V input range covers cold-crank (6.5V) to load-dump (33V) transients; SO-16 package meets AEC-Q200 thermal cycling requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar four-channel boost LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3065S16-13 | 3-channel version; identical SO-16 package, pin-compatible except CH4 pin repurposed as EN. | Used where only three LED strings are needed; lacks CH4 sink but adds dedicated enable control. | Select when design uses ≤3 strings and requires hardware enable/disable independent of DIM signals. |
| MPQ3367GR-A | Monolithic 4-channel boost driver with internal MOSFETs; 4.5–36V input; ±2% current match; no HVCC/VCC LDOs. | Reduces BOM count (no external MOSFET/diode) but increases thermal load; requires different layout and compensation. | Choose for simplified bill-of-materials and lower component count where thermal management permits monolithic integration. |
Compared with AL3066S16-13, AL3065S16-13 reduces channel count but adds dedicated EN functionality, while MPQ3367GR-A eliminates external power switches at the cost of higher junction temperature and less flexible output voltage headroom.
Availability
AL3066S16-13 is available at Aetrix Electronics and suitable for LCD monitor backlighting, industrial display modules, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AL3066S16-13 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 manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and lighting solutions for industrial, consumer, and automotive markets.
The AL3066 belongs to Diodes' high-efficiency LED driver product line, engineered specifically for multi-string WLED backlight applications demanding precision current matching, dual-dimming flexibility, and comprehensive fault protection in compact SO-16 packages.
FAQ
What is the maximum total output current capability of the AL3066S16-13?
The AL3066S16-13 supports up to 400mA per channel across four independent current sinks. When channels are paralleled (e.g., CH1+CH2), it can deliver up to 800mA per combined string. Total device current is limited by thermal design - with θJA = 79°C/W, continuous 4×400mA operation requires active cooling or derating above +60°C ambient.
Can the AL3066S16-13 drive LEDs directly without an external MOSFET?
No. The AL3066S16-13 is a controller-only IC: its OUT pin drives the gate of an external N-channel MOSFET, and current regulation occurs via the CS pin sensing the MOSFET's source voltage. It does not integrate power switches. External components - MOSFET, Schottky diode, inductor, and output capacitors - are mandatory for boost topology operation.
How does the AL3066S16-13 handle mixed LED string configurations (e.g., 3 strings used, 1 unused)?
The AL3066S16-13 supports flexible channel disable: unused channels (e.g., CH4) can be left floating to activate automatic open-LED protection, or CH3 can be pulled high to >5.4V (e.g., to HVCC) to trigger LED short protection and disable that channel. Both methods preserve operation of remaining strings without external logic.
What is the purpose of the two separate dimming inputs (DIM and DIM_ISET)?
DIM enables direct PWM dimming - the LED current is switched fully ON/OFF at the input PWM frequency. DIM_ISET enables PWM-to-analog dimming - the PWM signal modulates the ISET reference voltage via an internal low-pass filter, producing a proportional analog current level. This allows noise-sensitive applications to avoid PWM-induced EMI while retaining digital control.
AL3066S16-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 33V
- Voltage - Output:
- 100V
- Current - Output / Channel:
- 250mA
- Frequency:
- 1MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
AL3066S16-13 FAQ
1.How can I place an order for AL3066S16-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL3066S16-13 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 AL3066S16-13 reliable?
The price and inventory of AL3066S16-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL3066S16-13 is usually 5 days.
3.What payment methods are accepted for AL3066S16-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL3066S16-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL3066S16-13?
AL3066S16-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL3066S16-13 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 AL3066S16-13?
For technical support, including AL3066S16-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL3066S16-13 requirements.
6.How does Aetrix verify that AL3066S16-13 is sourced from the original manufacturer or authorized distributors?
All AL3066S16-13 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 AL3066S16-13 meets industry standards.
7.What is the process for return or replacement of AL3066S16-13?
All AL3066S16-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL3066S16-13, 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 AL3066S16-13 part is unused and in its original packaging.
Return procedure for AL3066S16-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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