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Diodes Incorporated AL5811MP-13
- Part No.:
- AL5811MP-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
AL5811MP-13.pdf
- Description:
- IC LED DRVR LIN PWM 75MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:572
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Product details
Overview
AL5811MP-13 from Diodes Incorporated is a linear adjustable-current LED driver IC with open-drain output, 60V LED voltage capability, ±6% typical current accuracy at 75mA, and 0.5V RSET reference voltage. It operates as a constant-current sink in low-side LED string configurations and supports non-isolated and isolated offline LED converters requiring stable thermal performance across –40°C to +125°C.
For engineers reviewing the AL5811MP-13 datasheet, AL5811MP-13 pinout, AL5811MP-13 application, or AL5811MP-13 equivalent, key selection factors include its 0.5V RSET bias point outside the LED current path, 60V output swing, MSOP-8EP thermal performance (θJA = 85°C/W), and compatibility with PWM dimming via RSET control.
Technical Context
The AL5811MP-13 implements a precision current-regulated sink architecture where LED current is set by an external resistor (ILED = 750 / RSET Ω) referenced to a stable 0.5V internal bandgap. Its open-drain output stage supports 1.0V–60V LED string voltages independent of VCC, enabling flexible supply and LED rail partitioning.
Thermal shutdown activates at TJ = +155°C with +20°C hysteresis, and supply current remains ≤350µA over –40°C to +125°C. Line regulation is 0.25% over VCC = 3.5V–60V, and RSET voltage drift is <0.01V across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Current Range | 10–75 mA; full-range operation requires VCC ≥ 3.5V; limited to 50 mA below 3.5V. |
| RSET Reference Voltage | 0.5 V; enables low-loss current setting with minimal overhead voltage drop. |
| Output Voltage Range (LED pin) | 1.0–60 V; allows direct drive of multi-LED strings without external boost or isolation. |
| Current Accuracy | ±6% typical at +25°C; maintains ±8% tolerance over –40°C to +125°C with proper PCB thermal design. |
| Supply Voltage Range | 2.0–60 V; supports wide-input offline and industrial DC supplies. |
| Thermal Shutdown Threshold | +155°C junction temperature; protects device during overload or poor heatsinking. |
| Package Thermal Resistance (θJA) | 85°C/W (MSOP-8EP); requires minimum 51mm × 51mm 2oz copper pad with thermal vias for rated 1.2W dissipation. |
Pinout & Package
AL5811MP-13 is housed in an exposed-pad MSOP-8EP package (3.0mm × 4.9mm × 1.1mm), where the EP must be soldered directly to GND for optimal thermal performance (θJC = 37°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | Accepts 2.0–60V; decoupling capacitor (0.1µF ceramic) required between VCC and GND near pin. |
| RSET | Current-setting reference | Sinks 0.5V-referenced bias current; defines ILED = 750 / RSET; also accepts PWM signal for dimming. |
| GND | Ground reference | Common return for VCC, RSET, and EP; all thermal vias must connect here. |
| LED | Current sink output | Open-drain NMOS drain; connects to cathode of LED string; supports up to 60V swing relative to GND. |
| NC (Pins 2,3,6,7) | No-connect | Unbonded die pads; must be left floating or tied to GND-no functional role. |
| EP (Exposed Pad) | Thermal & electrical ground | Primary heat path; must be soldered to solid GND copper area with ≥4 thermal vias. |
Key Features
| Feature | Design Value |
|---|---|
| Low RSET reference voltage | 0.5 V reduces power loss in current-setting resistor and improves efficiency at low VLED. |
| Wide LED voltage compliance | 1.0–60 V output swing enables single-driver control of 10–18 white LEDs (3.3V each) or red/IR strings. |
| Integrated thermal protection | +155°C shutdown with +20°C hysteresis prevents latch-up and ensures safe recovery after overload. |
| PWM dimming support | RSET pin accepts logic-level PWM (100Hz–10kHz); preserves linearity down to 0.1% duty cycle. |
| High PSRR | Rejects supply ripple >60 dB, critical for clean current regulation in noisy industrial or AC-DC environments. |
Applications
| Architectural LED Signage | Industrial Panel Indicators |
|---|---|
|
Use Scenario: Outdoor LED channel letters powered from 24–48V DC rails with ambient temperatures ranging from –30°C to +70°C. IC Role / Device Role / Timing Role: Constant-current sink regulating 60mA per segment, with VCC tapped from LED string to extend voltage range beyond 60V. Use Value: Eliminates need for switching converter per segment; 0.5V RSET minimizes heat rise in confined aluminum housings. |
Use Scenario: Backlighting for HMI pushbuttons and status LEDs on factory-floor PLC panels operating at 12V or 24V. IC Role / Device Role / Timing Role: Low-side current regulator driving single or dual LEDs with integrated thermal foldback at high ambient. Use Value: ±6% current accuracy ensures consistent brightness across units; MSOP-8EP fits dense PCB layouts. |
| Isolated Offline LED Drivers | Instrumentation Display Illumination |
|
Use Scenario: Secondary-side LED load in flyback-based AC/DC LED drivers where primary-side feedback is unavailable. IC Role / Device Role / Timing Role: Post-regulator maintaining precise current despite transformer leakage and rectifier variation. Use Value: 0.25% line regulation rejects input ripple; 60V rating accommodates reflected transients up to 66V. |
Use Scenario: Analog meter backlighting and digital display segments in handheld test equipment with battery or USB power. IC Role / Device Role / Timing Role: Adjustable-current sink enabling uniform luminance across multiple LED types (red/green/blue) via RSET selection. Use Value: RSET-based scaling allows one BOM item to support multiple brightness grades; –40°C to +125°C rating covers cold-storage and lab environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear LED current regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL5810MP-13 | Fixed 60mA output; no RSET pin; lacks PWM dimming capability. | Suitable only for fixed-current designs without brightness control. | Select when cost sensitivity outweighs dimming flexibility and current adjustability. |
| NSI45020AT1G | 20mA fixed current; 45V max LED voltage; no thermal shutdown; SOD-123 package. | Limited to low-power indicator LEDs; unsuitable for >45V chains or thermal-critical environments. | Choose only for space-constrained, low-current, non-thermal applications where footprint is priority. |
Compared with AL5811MP-13, AL5810MP-13 sacrifices adjustability and dimming for lower BOM count, while NSI45020AT1G trades voltage headroom, protection, and current range for ultra-small size-neither matches the AL5811MP-13's combination of 60V compliance, 75mA adjustability, and integrated thermal safety.
Availability
AL5811MP-13 is available at Aetrix Electronics and suitable for architectural LED signage, industrial panel indicators, isolated offline LED converters, and instrumentation display illumination requiring stable component supply across extended temperature and voltage ranges.
Supply support for AL5811MP-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 lighting solutions for industrial, automotive, and consumer markets.
The AL5811 belongs to Diodes' linear LED driver product line, engineered for thermally robust, low-component-count LED current regulation in space-constrained and high-ambient-temperature applications.
FAQ
What is the minimum VCC required to achieve 75mA LED current?
The AL5811MP-13 delivers full 75mA only when VCC ≥ 3.5V. Below that threshold-down to the absolute minimum of 2.0V-the maximum LED current is limited to 50mA due to internal bias constraints, as confirmed in the Recommended Operating Conditions table (Note 9). This limitation ensures stable regulation under low-voltage startup or brownout conditions.
Can AL5811MP-13 drive LED strings exceeding 60V?
Yes-by tapping VCC from the LED string itself (high-side configuration), the AL5811MP-13 can regulate currents in strings >60V, provided PWM dimming is not used. In this topology, the IC's VCC pin floats at the string voltage, while the LED pin sinks current from the cathode end. The datasheet explicitly validates this in Figure 3 and Application Note "High Voltage Operation".
How does the RSET pin enable PWM dimming?
The RSET pin accepts a series MOSFET switch between the RSET resistor and GND. When the MOSFET turns off, RSET current ceases, forcing ILED to zero; turning it on restores regulation. This method preserves linearity across 0.1–100% duty cycles at frequencies up to 10kHz, as verified in Figure 5 and Figure 6 of the datasheet.
Why is the exposed pad (EP) mandatory to connect to GND?
The EP is the primary thermal conduction path (θJC = 37°C/W) and electrically tied to internal GND. Leaving it unconnected raises junction temperature by >40°C under 1.2W dissipation, risking premature thermal shutdown or reliability degradation. The datasheet mandates direct GND soldering with thermal vias-confirmed in Package Thermal Data (Note 5) and Suggested Pad Layout.
AL5811MP-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:
- 75mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
AL5811MP-13 FAQ
1.How can I place an order for AL5811MP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL5811MP-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 AL5811MP-13 reliable?
The price and inventory of AL5811MP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5811MP-13 is usually 5 days.
3.What payment methods are accepted for AL5811MP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5811MP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL5811MP-13?
AL5811MP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL5811MP-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 AL5811MP-13?
For technical support, including AL5811MP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5811MP-13 requirements.
6.How does Aetrix verify that AL5811MP-13 is sourced from the original manufacturer or authorized distributors?
All AL5811MP-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 AL5811MP-13 meets industry standards.
7.What is the process for return or replacement of AL5811MP-13?
All AL5811MP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL5811MP-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 AL5811MP-13 part is unused and in its original packaging.
Return procedure for AL5811MP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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