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Diodes Incorporated AL5812MP-13
- Part No.:
- AL5812MP-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
AL5812MP-13.pdf
- Description:
- IC LED DRVR LIN PWM 150MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,378
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Product details
Overview
AL5812MP-13 from Diodes Incorporated is a 60V, 150mA adjustable linear LED driver with open-drain output, ±3% LED current tolerance, and 0.5V RSET reference voltage. It operates as a high-side or low-side current sink for LED strings in non-isolated and isolated offline converters, supporting thermal shutdown at 155°C and PWM dimming via the RSET pin. It drives common ½W LEDs (100–150mA) with minimal overhead voltage.
For engineers reviewing the AL5812MP-13 datasheet, AL5812MP-13 pinout, AL5812MP-13 application, or AL5812MP-13 equivalent, this page delivers verified specifications, package-specific thermal data, real-world LED chain voltage handling (up to 60V), RSET-based current calculation (ILED = 750/RSET), and design-critical thermal derating curves for MSOP-8EP layout.
Technical Context
The AL5812MP-13 implements a precision current-sink architecture where LED current is set by an external resistor on the RSET pin (ILED = 750/RSET Ω), decoupling regulation from LED forward voltage variation. Its open-drain LED pin supports 1V–60V output swing, enabling direct drive of multi-LED strings without external MOSFETs.
It features integrated thermal shutdown (155°C trip, 20°C hysteresis), UVLO (2V), and high PSRR to maintain stable current under supply ripple. The 0.5V RSET voltage minimizes power loss in the setting resistor and avoids loading the LED current path-critical for efficiency in thermally constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Voltage | 60V - supports up to 16–18 white LEDs (3.3V each) in series without external boost stage. |
| LED Current Range | 10–150mA - covers standard ½W LEDs; accuracy ±3% at 25°C, 95–105% over –40°C to +125°C. |
| RSET Reference Voltage | 0.5V - enables use of standard 1% resistors (e.g., 7.5kΩ → 100mA) with <1mW dissipation in RSET. |
| Supply Voltage Range | 3.5–60V - allows direct connection to 12V/24V/48V rails or tapping from LED string for >60V operation. |
| Thermal Shutdown | 155°C with 20°C hysteresis - protects device during overload or poor PCB heatsinking; self-recovers after cooldown. |
| Package Thermal Resistance | θJA = 90°C/W (MSOP-8EP) - requires ≥51mm×51mm 2oz copper pad + thermal vias to sustain 1.1W at TA=25°C. |
| Supply Current | 320–400µA - ultra-low quiescent draw enables use in always-on signage and instrumentation backlighting. |
Pinout & Package
AL5812MP-13 is packaged in MSOP-8EP (exposed pad), optimized for thermal performance in space-constrained LED driver layouts. The exposed pad must be soldered directly to GND plane for effective heat transfer.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power Supply Input | Accepts 3.5–60V; connect 0.1µF ceramic capacitor to GND near pin for stability. |
| RSET | Current Setting Input | Sinks bias current; ILED = 750/RSET (RSET in Ω); also accepts PWM signal for dimming. |
| GND | Ground Reference | System return node; connects to PCB ground plane and exposed pad for thermal conduction. |
| LED | Open-Drain Current Sink Output | Drives LED cathode; swings 1–60V relative to GND; handles up to 165mA peak. |
| NC | No Connection | Pins 2, 3, 6, 7 are internally unconnected - leave floating or tie to GND per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Low RSET voltage (0.5V) | Reduces RSET power loss by >80% vs. 1.25V references, enabling smaller, cheaper resistors and tighter thermal margins. |
| ±3% current accuracy | Ensures consistent brightness across LED batches without per-unit calibration - critical for signage uniformity. |
| 60V output capability | Eliminates need for external high-voltage MOSFET in medium-voltage LED strings (e.g., 36V industrial lighting). |
| Integrated thermal shutdown | Prevents catastrophic failure during ambient temperature rise or reduced airflow - no external sensor required. |
| PWM dimming via RSET | Enables analog-dimming-grade linearity (Figure 7) using low-cost MCU GPIO instead of dedicated dimming ICs. |
Applications
| LED Signage | Instrumentation Backlighting |
|---|---|
Use Scenario: Outdoor channel letters and dynamic message signs requiring consistent brightness across wide temperature ranges (–40°C to +85°C). IC Role / Device Role / Timing Role: Constant-current sink regulating individual LED segments; operates in high-side configuration with VCC tapped from LED string. Use Value: Maintains ±3% current accuracy over temperature, preventing visible luminance drift between modules in large-format displays. |
Use Scenario: Analog panel meters and medical diagnostic equipment requiring flicker-free, stable backlight intensity. IC Role / Device Role / Timing Role: Low-noise linear current source driving parallel LED arrays; powered from isolated 5V rail while sinking current from 12V LED string. Use Value: 0.5V RSET reference minimizes EMI-sensitive noise injection into analog signal paths near metering circuitry. |
| Isolated Offline Converters | Architectural Accent Lighting |
Use Scenario: Secondary-side constant-current regulation in flyback-based LED drivers for Class II AC/DC supplies. IC Role / Device Role / Timing Role: Post-regulator current sink referenced to secondary ground; accepts variable input from rectified flyback output. Use Value: High PSRR rejects switching ripple from primary-side controller, delivering clean DC current to LEDs without additional LC filtering. |
Use Scenario: Linear LED strips embedded in ceiling coves or wall sconces with limited heatsinking area. IC Role / Device Role / Timing Role: Compact current regulator in MSOP-8EP package mounted directly on FR-4 strip PCB with thermal vias to inner ground layer. Use Value: 90°C/W θJA enables 100mA operation at 60°C ambient using only 2oz copper - eliminates need for aluminum extrusions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable linear LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL5810MP-13 | Fixed 120mA output; no RSET pin; 40V max output voltage. | Limited to shorter LED strings (<12 LEDs); no dimming or current adjustment. | Select when fixed current and lower BOM count outweigh flexibility needs. |
| AP3606B-13 | Higher 200mA rating; 0.25V reference; requires external sense resistor in LED path. | Higher power dissipation due to sense resistor; less efficient at low currents. | Choose for >150mA loads where RSET-less topology simplifies layout but demands higher thermal margin. |
Compared with AL5812MP-13, AL5810MP-13 trades adjustability for simplicity and lower cost in fixed-output systems, while AP3606B-13 offers higher current but sacrifices the low-overhead RSET architecture - making AL5812MP-13 optimal for thermally sensitive, adjustable 100–150mA LED applications.
Availability
AL5812MP-13 is available at Aetrix Electronics and suitable for LED signage, instrumentation backlighting, isolated offline converters, and architectural accent lighting requiring stable component supply, full RoHS compliance, and long-lifecycle support.
Supply support for AL5812MP-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 high-reliability power management, signal integrity, and LED solutions for industrial, automotive, and consumer markets.
The AL5812 belongs to Diodes' linear LED driver product line, engineered specifically for thermally efficient, low-component-count constant-current regulation in space- and cost-constrained lighting applications - prioritizing accuracy, wide voltage range, and robust thermal protection.
FAQ
What is the minimum RSET resistor value for stable 150mA operation?
The datasheet specifies RSET = 4.99kΩ for 150mA (ILED = 750 / 4990 ≈ 150.3mA). At TA = +25°C, this yields 142.5–157.5mA tolerance. Below 4.99kΩ, current exceeds absolute maximum 165mA sink rating and risks thermal shutdown or reliability degradation - do not use resistors <4.7kΩ.
Can AL5812MP-13 drive LED strings exceeding 60V?
Yes - by connecting VCC to a tap point on the LED string (Figure 15), the device can regulate current for strings >60V. However, PWM dimming is disabled in this configuration because the RSET pin cannot be referenced to system ground. Ensure the VCC tap provides sufficient voltage (>3.5V) and current (>500µA) for internal circuitry.
How does thermal derating affect maximum LED current at 85°C ambient?
In MSOP-8EP, θJA = 90°C/W and max TJ = 125°C. At TA = 85°C, allowable ΔT = 40°C → max power = 40 / 90 ≈ 0.444W. With VDROP = VCC − VLED, e.g., 24V − 9V = 15V, max ILED = 0.444W / 15V ≈ 29.6mA. For 100mA operation at 85°C, reduce VDROP via lower VCC or higher VLED, or improve PCB heatsinking.
Is the exposed pad electrically connected to GND internally?
No - the exposed pad (EP) is thermally connected only and must be externally soldered to the PCB's GND plane for heat conduction. It is not bonded to the die's GND net; relying solely on EP for electrical grounding violates the pin description (GND pin #5 is the sole electrical ground reference). Always connect pin 5 to GND separately.
AL5812MP-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 3.5V
- Voltage - Supply (Max):
- 60V
- Voltage - Output:
- 1V ~ 60V
- Current - Output / Channel:
- 150mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
AL5812MP-13 FAQ
1.How can I place an order for AL5812MP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL5812MP-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 AL5812MP-13 reliable?
The price and inventory of AL5812MP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5812MP-13 is usually 5 days.
3.What payment methods are accepted for AL5812MP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5812MP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL5812MP-13?
AL5812MP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL5812MP-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 AL5812MP-13?
For technical support, including AL5812MP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5812MP-13 requirements.
6.How does Aetrix verify that AL5812MP-13 is sourced from the original manufacturer or authorized distributors?
All AL5812MP-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 AL5812MP-13 meets industry standards.
7.What is the process for return or replacement of AL5812MP-13?
All AL5812MP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL5812MP-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 AL5812MP-13 part is unused and in its original packaging.
Return procedure for AL5812MP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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