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Diodes Incorporated AL3022MTR-G1
- Part No.:
- AL3022MTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AL3022MTR-G1.pdf
- Description:
- IC LED DRIVER CTRLR PWM 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,414
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Product details
Overview
AL3022MTR-G1 from Diodes Incorporated is a fixed-frequency (140 kHz), voltage-mode PWM boost controller with 0.2 V feedback reference, external compensation, and integrated protection including UVLO (3.8 V turn-on), OVP (1.55 V threshold), OCP (0.33 V CS threshold), OTP (+160 °C shutdown), and VOUT short-to-GND detection. It supports both PWM and analog dimming via the EN pin and targets low-cost LED backlight supplies for displays.
For engineers reviewing the AL3022MTR-G1 datasheet, AL3022MTR-G1 pinout, AL3022MTR-G1 application, or AL3022MTR-G1 equivalent, key selection considerations include its 0.2 V FB reference for precise output regulation, SO-8 package compatibility with space-constrained LED driver PCBs, dual dimming interface (EN pin PWM >100 Hz / analog 0.8–2.4 V), and full protection suite enabling robust operation in TV and monitor backlight systems.
Technical Context
The AL3022 employs a voltage-mode control architecture with an internal 1.25 V bandgap reference and error amplifier (Gm = 400 µA/V) feeding into a fixed-frequency oscillator. Its COMP pin provides direct access to the error amplifier output for external loop compensation, enabling stable regulation across varying input (4–18 V) and load conditions.
Protection logic is fully integrated and autonomous: UVLO latches off below 3.6 V with 200 mV hysteresis; OVP triggers at 1.55 V on the OVP pin and latches until reset by VIN < 3.6 V or EN < 0.3 V; OCP responds to ≥0.33 V on CS within one switching cycle; OTP shuts down non-latching at +160 °C with +20 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 140 kHz fixed - enables predictable EMI filtering and compact magnetics design |
| Feedback Reference Voltage | 0.200 V ±3% - allows high-accuracy output voltage setting with minimal resistor divider error |
| UVLO Turn-On Threshold | 3.8 V - ensures reliable startup only after input rail stabilizes above minimum operating voltage |
| OCP Threshold | 0.33 V on CS pin - sets current limit directly via sense resistor without external comparator |
| Shutdown Current | 0.1 µA max - minimizes standby power loss in always-on display systems |
| Max Duty Cycle | 95% - supports wide input-to-output voltage ratios required in LED boost applications |
| EN Dimming Range | PWM: >100 Hz, 1–90% duty; Analog: 0.8–2.4 V DC - provides flexible brightness control without external dimming IC |
Pinout & Package
AL3022MTR-G1 is housed in a standard SO-8 (Small Outline-8) package with exposed pad not electrically connected, footprint compliant with JEDEC MS-012, and optimized for thermal dissipation in LED driver applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Power supply input | Accepts 4–18 V DC; requires local 22 µF/25 V bulk capacitor to stabilize input during switching transients |
| 2 OUT | Gate driver output | Drives external N-channel MOSFET gate; capable of sourcing/sinking 10 mA with 65.5 ns rise time (1 nF load) |
| 3 GND | Power and signal ground reference | Common return path for VIN, CS, FB, OVP, and COMP; must be low-impedance plane for stability |
| 4 CS | Current sense input | Monitors MOSFET source current via external shunt; trips OCP at 0.33 V to prevent overcurrent damage |
| 5 FB | Feedback input | Compares divided output voltage against 0.2 V reference; sets regulated VOUT = 0.2 × (R1+R2)/R2 |
| 6 COMP | Error amplifier output | Provides access to internal transconductance amplifier output for external Type II/III compensation network |
| 7 OVP | Overvoltage/LED open monitor | Detects open-circuit LED string (VOVP > 1.55 V) or shorted output (VOVP < 0.1 V); initiates latch-off or auto-recovery |
| 8 EN | Enable and dimming control | Logic-level enable (0.3 V off / 2.6 V on); accepts PWM (>100 Hz) or analog (0.8–2.4 V) dimming signals directly |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM control | Enables stable loop compensation using external RC network on COMP pin for consistent line/load regulation |
| 0.2 V precision feedback reference | Reduces resistor divider power loss and improves output accuracy vs. typical 1.25 V references |
| Integrated multi-protection suite | Eliminates need for discrete UVLO, OVP, OCP, OTP, and short-circuit monitoring circuits |
| Dual dimming interface on EN pin | Supports both industry-standard PWM dimming and smooth analog dimming without additional control ICs |
| SO-8 package with thermal pad option | Enables high-power-density LED driver layout while maintaining manufacturability and thermal performance |
Applications
| LED TV Backlight | LED Monitor Power Supply |
|---|---|
Use Scenario: Driving parallel strings of white LEDs in 32–65 inch LCD TVs requiring adjustable brightness and high reliability. IC Role / Device Role / Timing Role: Primary boost controller regulating constant-current LED string voltage; manages dimming via EN pin and protects against open/short faults. Use Value: Enables single-chip solution for 100–200 W backlight supplies with <±2% output current regulation and automatic fault recovery. | Use Scenario: Powering edge-lit LED arrays in commercial-grade monitors where EMI compliance and thermal margin are critical. IC Role / Device Role / Timing Role: Voltage-mode boost controller generating 40–80 V output from 12 V input; synchronizes dimming with system video timing via EN PWM input. Use Value: Delivers low-noise, low-ripple LED current with built-in 140 kHz switching frequency for simplified EMI filter design. |
| LED Display Module Driver | Industrial Panel Backlight |
Use Scenario: Compact LED signage modules requiring wide dimming range and long operational life in ambient temperatures up to +85 °C. IC Role / Device Role / Timing Role: Constant-frequency boost controller with analog dimming (0.8–2.4 V EN input) for flicker-free brightness control. Use Value: Achieves >10,000:1 dimming ratio using analog method while maintaining color consistency and eliminating PWM-induced EMI. | Use Scenario: Ruggedized HMI panels in factory automation equipment needing continuous operation under variable input voltage (4–18 V). IC Role / Device Role / Timing Role: Fault-tolerant LED driver with UVLO hysteresis, OTP, and VOUT short-to-GND protection for unattended 24/7 use. Use Value: Ensures system uptime by auto-recovering from transient overloads and latching off only on catastrophic failures (e.g., LED open). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1542DK-LF-Z | Current-mode control; 1.215 V FB reference; no integrated OVP/OCP on dedicated pins | Requires external OVP/OCP circuitry; better suited for general-purpose boost, not LED-specific dimming | Select when needing current-mode stability or higher efficiency at light loads, but accept added BOM cost for protection |
| LM3410XMF/NOPB | Fixed 1.6 MHz frequency; 0.235 V FB reference; integrated MOSFET; no analog dimming support | Monolithic solution with lower quiescent current; limited to <1 A output, no EN-based analog dimming | Select for ultra-compact, low-power LED drivers (<5 W) where board space is more critical than dimming flexibility |
Compared with MP1542DK-LF-Z and LM3410XMF/NOPB, AL3022MTR-G1 uniquely combines LED-optimized features-0.2 V FB reference, dual EN dimming, and five integrated protections-in an SO-8 package, making it purpose-built for cost-sensitive, medium-power display backlight designs requiring high reliability and design simplicity.
Availability
AL3022MTR-G1 is available at Aetrix Electronics and suitable for LED TV backlight, LED monitor power supply, and industrial panel backlight applications requiring stable component supply, RoHS-compliant green packaging, and long-term production continuity.
Supply support for AL3022MTR-G1 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 high-performance, high-reliability components for power management, signal integrity, and protection applications.
The AL3022 belongs to Diodes' LED backlight controller product line, designed specifically for cost-effective, feature-rich boost solutions in consumer and industrial display systems with stringent thermal and protection requirements.
FAQ
What is the recommended external compensation network for AL3022MTR-G1?
The AL3022MTR-G1 requires a Type II compensation network on the COMP pin. A typical configuration uses a series RC (e.g., 10 kΩ + 100 nF) from COMP to FB, plus a parallel capacitor (e.g., 1 nF) from COMP to GND. Component values must be selected based on output capacitance, inductor value, and desired phase margin per the datasheet's loop compensation guidelines.
Can AL3022MTR-G1 drive multiple LED strings in parallel?
Yes, AL3022MTR-G1 regulates output voltage-not current-so parallel LED strings require individual current-setting resistors or external constant-current regulators. The controller supports up to 200 W output depending on MOSFET and inductor selection, and its OVP and OCP functions protect against string-open or short-circuit faults across all strings.
How does the EN pin handle simultaneous PWM and analog dimming signals?
The EN pin cannot process both simultaneously: applying a DC voltage (0.8–2.4 V) enables analog dimming; applying a >100 Hz PWM signal enables digital dimming. Mixing signals causes undefined behavior. Designers must select one method and ensure clean signal routing-e.g., RC filtering for analog, logic-level buffering for PWM-to avoid noise-induced mis-triggering.
What is the thermal performance limitation of AL3022MTR-G1 in SO-8 package?
With θJA = 105 °C/W, AL3022MTR-G1 dissipates up to ~0.5 W continuously before reaching +150 °C junction temperature at +85 °C ambient. For sustained >0.3 W power dissipation, a 2-layer PCB with ≥2 cm² copper pour under the exposed pad (if used) and thermal vias is recommended to maintain safe operation within its +160 °C OTP threshold.
AL3022MTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-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:
- 1
- Voltage - Supply (Min):
- 4V
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- 20V
- Current - Output / Channel:
- -
- Frequency:
- 140kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
AL3022MTR-G1 FAQ
1.How can I place an order for AL3022MTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL3022MTR-G1 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 AL3022MTR-G1 reliable?
The price and inventory of AL3022MTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL3022MTR-G1 is usually 5 days.
3.What payment methods are accepted for AL3022MTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL3022MTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL3022MTR-G1?
AL3022MTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL3022MTR-G1 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 AL3022MTR-G1?
For technical support, including AL3022MTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL3022MTR-G1 requirements.
6.How does Aetrix verify that AL3022MTR-G1 is sourced from the original manufacturer or authorized distributors?
All AL3022MTR-G1 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 AL3022MTR-G1 meets industry standards.
7.What is the process for return or replacement of AL3022MTR-G1?
All AL3022MTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AL3022MTR-G1, 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 AL3022MTR-G1 part is unused and in its original packaging.
Return procedure for AL3022MTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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