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Diodes Incorporated AL3065S16-13
- Part No.:
- AL3065S16-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AL3065S16-13.pdf
- Description:
- IC LED DRVR CTRLR PWM 250MA 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,554
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Product details
Overview
AL3065S16-13 from Diodes Incorporated is a four-channel boost LED driver IC for WLED backlight systems, operating from 4.5V to 33V input, delivering up to 400mA per channel with ±1.5% typical current matching, adjustable switching frequency (0.1–1MHz), and support for direct PWM, PWM-to-analog, and DC-to-analog dimming modes in LCD monitor and TV applications.
For engineers reviewing the AL3065S16-13 datasheet, AL3065S16-13 pinout, AL3065S16-13 application, or AL3065S16-13 equivalent, key selection criteria include channel current precision, OVP/OTP/LED open-short protection coverage, SO-16 thermal performance (θJA = 79°C/W), and compatibility with high-voltage LED strings up to 60V on CHx pins.
Technical Context
The AL3065 implements a current-mode boost controller architecture with integrated gate driver (5V OUT pin) for external N-MOSFET, four independent current-sink channels (CH1–CH4), and dual-dimming control via ADIM/DIM pins enabling three distinct dimming schemes. Its OVP circuit monitors output voltage via resistor divider feedback at the OVP pin (2.0V threshold).
Protection logic includes cycle-by-cycle current limiting (540mV CS threshold), latched LED short detection (7.3V CHx threshold), UVLO (4.0V turn-on), and thermal shutdown at +160°C with +30°C hysteresis. The RT pin sets oscillator frequency using an external resistor, while ISET configures full-scale current via RISET-to-GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 33V - supports wide-input industrial and automotive supply rails without pre-regulation. |
| Max Output Current per Channel | 400mA - enables driving high-brightness WLED strings with single-channel thermal margin. |
| Current Matching (Typ.) | ±1.5% - ensures uniform luminance across multi-string LCD backlights without per-string calibration. |
| Switching Frequency Range | 0.1MHz to 1MHz - allows trade-off between small magnetics (high-freq) and low switching loss (low-freq). |
| PWM Dimming Minimum Duty | 1/10,000 at 100Hz - delivers >4-decade brightness control range for high-contrast display applications. |
| OVP Threshold | 2.0V (±0.1V) - provides precise overvoltage cutoff before LED string or Schottky failure occurs. |
| Junction Temp Limit | +160°C with +30°C hysteresis - enables reliable operation under sustained high-power backlight loads. |
Pinout & Package
AL3065S16-13 is housed in a standard SO-16 (Small Outline, 16-pin) package with exposed pad for thermal dissipation (θJA = 79°C/W on 2"×2" FR-4, 2oz Cu). Pin 15 is GND; pins 1,13,14,16 are LED current sinks; pin 7 drives external MOSFET gate; pin 8 supplies internal 5V VCC regulator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH1–CH4 (Pins 1,13,14,16) | LED current sink outputs | Each sinks up to 400mA; open-circuit tolerant; voltage-rated to 60V for high-string-count WLED arrays. |
| ISET (Pin 2) | Reference current programming node | Connects to GND via RISET to set full-scale channel current (e.g., 12kΩ → 100mA per channel). |
| OVP (Pin 3) | Overvoltage sense input | Monitors output via resistor divider; triggers shutdown at 2.0V to protect LEDs and diode from overvoltage stress. |
| RT (Pin 4) | Oscillator frequency control | External resistor to GND sets switching frequency from 100kHz to 1MHz for optimal EMI/component sizing. |
| EN (Pin 5) | Enable/disable logic input | Active-high (≥2.4V); reduces quiescent current to <1µA in shutdown mode for system power gating. |
| CS (Pin 6) | Current sense amplifier input | Connects to MOSFET source resistor; triggers cycle-by-cycle OCP at 540mV threshold for robust fault handling. |
| OUT (Pin 7) | Gate driver output | 5V CMOS-level output drives external N-MOSFET gate; supports fast switching with 30ns rise/fall times. |
| VCC (Pin 8) | Internal LDO output | 5V regulated supply for internal circuitry; requires ≥2.2µF ceramic bypass capacitor to GND for stability. |
| VIN (Pin 9) | Main power input | Accepts 4.5–33V; requires local 10µF ceramic decoupling to suppress input ripple and transients. |
| ADIM (Pin 10) | Analog dimming control interface | Accepts 0–1.5V DC for analog dimming or filters PWM from DIM pin when capacitor is added to GND. |
| COMP (Pin 11) | Loop compensation node | Connects external RC network to stabilize current regulation loop; supports soft-start via capacitor ramp. |
| DIM (Pin 12) | PWM dimming signal input | Accepts 0.3–2.5V logic; enables direct PWM dimming when ADIM = VCC, or PWM-to-analog when ADIM has RC filter. |
| GND (Pin 15) | Power and signal reference | Common return for VIN, ISET, RT, CS, ADIM, DIM, COMP; must be low-impedance plane for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Four independent current sinks | Enables simultaneous drive of up to four WLED strings with individual open/short protection per channel. |
| Three dimming modes | Direct PWM (1/10,000 min duty), PWM-to-analog (RC-filtered), and DC-to-analog (0–1.5V ADIM) - eliminates color shift and simplifies MCU interface. |
| High-voltage CHx pins | Rated to 60V - supports >10-series white LED strings (≈35V typical) with margin for transient overshoot. |
| Comprehensive fault protection | Includes latched LED short (7.3V), open detection, Schottky/inductor short (800mV CS), VOUT short, OTP (+160°C), and UVLO (4.0V). |
| SO-16 thermal design | θJA = 79°C/W on standard PCB - enables 2.5W continuous power dissipation with ≤50°C ambient rise at full load. |
Applications
| LCD Monitor Backlight | LCD TV Backlight |
|---|---|
|
Use Scenario: Driving 4 parallel WLED strings in 24-inch desktop monitors with dynamic local dimming zones. IC Role / Device Role / Timing Role: Four-channel current source boost controller regulating string current and synchronizing PWM dimming across all zones. Use Value: ±1.5% current matching ensures uniform screen luminance; 1/10,000 PWM duty enables 10-bit+ grayscale resolution without color distortion. |
Use Scenario: Powering edge-lit LED arrays in 43–55 inch LCD TVs requiring high-current, high-reliability backlight drivers. IC Role / Device Role / Timing Role: Primary boost LED driver managing up to 400mA per string with OVP, OTP, and LED open/short protection for field reliability. Use Value: 60V CHx rating supports 12–15 LED series per string; SO-16 package enables compact layout with traceable thermal path to heatsink. |
| LCD Display Module | Industrial HMI Panel |
|
Use Scenario: Embedded display modules in medical or test equipment requiring stable, flicker-free backlighting under variable input voltage. IC Role / Device Role / Timing Role: Constant-current LED driver with UVLO and soft-start ensuring clean startup across 4.5–33V input range. Use Value: 4.5V minimum VIN allows operation from 5V USB or 12V industrial rails; ±3% current precision maintains consistent brightness over temperature. |
Use Scenario: Human-machine interface panels in factory automation where ESD robustness and long-term reliability are critical. IC Role / Device Role / Timing Role: LED backlight controller with 4kV HBM ESD rating and AEC-Q200-aligned packaging (lead-free, halogen-free). Use Value: 4kV HBM ESD tolerance prevents latch-up during panel assembly or field maintenance; RoHS 3 and "Green" compliance meet industrial environmental mandates. |
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 |
|---|---|---|---|
| AL3069 | Successor part with identical pinout, improved current matching (±1.0%), lower quiescent current (2.5µA vs 3µA), and extended OVP hysteresis (300mV vs 200mV). | Designed for new designs requiring longer product lifecycle; supports same SO-16 footprint and BOM reuse. | Select AL3069 for new designs-Diodes explicitly states AL3065 is obsolete and recommends AL3069 as drop-in replacement. |
| LM3409QMYX/NOPB | Single-channel automotive-grade boost LED controller (AEC-Q100 Grade 1), no integrated multi-string current sinks; requires external current mirrors for multi-channel use. | Suitable only for designs where channel count is re-architected; lacks native 4-channel matching and ADIM/DIM dual-dimming interface. | Consider only if AEC-Q100 qualification is mandatory and multi-channel integration can be implemented externally with added complexity. |
Compared with AL3065S16-13, AL3069 offers enhanced precision and longevity as its designated successor, while LM3409QMYX requires significant redesign to replicate four-channel functionality-making AL3069 the only viable direct alternative for continuity and performance uplift.
Availability
AL3065S16-13 is available at Aetrix Electronics and suitable for LCD monitor backlighting, LCD TV backlighting, and industrial HMI panel applications requiring stable component supply despite its obsolete status-inventory is managed for legacy system support and end-of-life transition assistance.
Supply support for AL3065S16-13 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 with ISO 9001 and IATF 16949 certified facilities.
The AL3065 belongs to Diodes' LED backlight driver product line, engineered specifically for high-efficiency, multi-string WLED boost conversion in consumer and industrial displays with integrated protection and flexible dimming.
FAQ
Is AL3065S16-13 still in active production?
No-AL3065S16-13 is officially obsolete and discontinued by Diodes Incorporated as of February 2025. It is available only from authorized distributors' remaining inventory and Aetrix Electronics' legacy stock. Diodes recommends migrating to AL3069 for new designs.
Can AL3065S16-13 drive more than 400mA per channel?
No-its absolute maximum rated channel current is 400mA. However, two channels (e.g., CH1 + CH2) can be paralleled externally with matched resistors to deliver up to 800mA to a single LED string, maintaining current balance within ±1.5% matching tolerance.
What is the minimum recommended capacitor for VCC bypass?
A minimum 2.2µF X7R ceramic capacitor is required between VCC (Pin 8) and GND, placed as close as possible to the pin. This ensures stable 5V internal LDO operation and prevents oscillation during fast load transients in boost regulation.
How does LED open-circuit protection behave across multiple strings?
When one string opens, AL3065 disables that channel (CHx pin voltage drops below 100mV) and continues regulating remaining strings. If all four strings open, OVP triggers at 2.0V and the IC latches off-requiring EN toggle or VIN cycle to reset.
AL3065S16-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 60V
- Current - Output / Channel:
- 250mA
- Frequency:
- 100kHz ~ 1MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
AL3065S16-13 FAQ
1.How can I place an order for AL3065S16-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL3065S16-13 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 AL3065S16-13 reliable?
The price and inventory of AL3065S16-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL3065S16-13 is usually 5 days.
3.What payment methods are accepted for AL3065S16-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL3065S16-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL3065S16-13?
AL3065S16-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL3065S16-13 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 AL3065S16-13?
For technical support, including AL3065S16-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL3065S16-13 requirements.
6.How does Aetrix verify that AL3065S16-13 is sourced from the original manufacturer or authorized distributors?
All AL3065S16-13 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 AL3065S16-13 meets industry standards.
7.What is the process for return or replacement of AL3065S16-13?
All AL3065S16-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL3065S16-13, 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 AL3065S16-13 part is unused and in its original packaging.
Return procedure for AL3065S16-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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