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Diodes Incorporated AL5812FF-7
- Part No.:
- AL5812FF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AL5812FF-7.pdf
- Description:
- IC LED DRVR LIN PWM 150MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:76,702
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Product details
Overview
AL5812FF-7 from Diodes Incorporated is a 60V, 150mA adjustable linear LED driver IC 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 chains up to 60V and enabling PWM dimming via the RSET pin. Designed for instrumentation illumination and LED signage, it delivers stable current regulation across –40°C to +125°C.
For engineers reviewing the AL5812FF-7 datasheet, AL5812FF-7 pinout, AL5812FF-7 application, or AL5812FF-7 equivalent, key selection criteria include its 0.5V RSET voltage for low-loss current setting, thermal shutdown at 155°C, 1.47W max power dissipation in U-DFN3030-6, and compatibility with standard resistor-based current programming without external sense resistors in the LED path.
Technical Context
The AL5812FF-7 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 LED output supports 1V–60V swing, enabling direct drive of multi-LED strings without series pass transistors.
It features integrated thermal shutdown (155°C, 20°C hysteresis), under-voltage lockout (~2V), and high PSRR to maintain current accuracy despite VCC ripple. The RSET pin serves dual function: biasing the internal regulator and accepting PWM signals for dimming-eliminating need for external MOSFET switches in basic implementations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Voltage | 60V - Enables driving long LED strings without external boost or buck stages. |
| LED Current Range | 10–150mA - Covers common ½W LEDs; accuracy optimized above 60mA. |
| RSET Reference Voltage | 0.5V - Minimizes power loss in current-setting resistor; decoupled from LED path. |
| Current Accuracy | ±3% at +25°C - Ensures consistent brightness across units without calibration. |
| Thermal Shutdown | 155°C with 20°C hysteresis - Protects against thermal runaway during overloads or poor heatsinking. |
| Supply Current | 320–400µA - Ultra-low quiescent draw preserves efficiency in battery-backed or low-power systems. |
| Operating Temp | –40°C to +125°C - Supports industrial and automotive under-hood lighting applications. |
Pinout & Package
AL5812FF-7 is packaged in a thermally enhanced U-DFN3030-6 (3.0mm × 3.0mm, 0.6mm height) with exposed pad for improved junction-to-board thermal resistance (θJA = 69°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 3.5–60V; requires local 0.1µF ceramic bypass capacitor to GND. |
| RSET | Current-setting & PWM input | 0.5V reference node; connects to GND via resistor to set ILED = 750/RSET; accepts PWM for dimming. |
| GND | Ground reference | Primary return path; exposed pad must be soldered to PCB ground plane for thermal and electrical integrity. |
| LED | Current-sink output | Open-drain NMOS output capable of 1–60V swing; sinks full LED current. |
| NC | No connection | Pins 2 and 5 are unconnected die pads; must be left floating or tied to GND per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Low RSET voltage | 0.5V reference enables <10mW resistor power loss at 100mA, reducing thermal burden vs. 1.25V references. |
| Thermal protection | 155°C shutdown with 20°C hysteresis prevents latch-up and ensures safe recovery after overload. |
| High-side drive capability | Supports LED anode-to-VCC configuration, extending usable chain voltage beyond 60V when VCC is tapped from string. |
| UVLO threshold | ~2V prevents erratic startup or brown-out operation in low-input scenarios like cold-cranking automotive. |
| RoHS/Green compliance | Fully lead-free, halogen-free, and antimony-free per Diodes Inc. definitions (Br+Cl <1500ppm, Sb <1000ppm). |
Applications
| LED Signage | Instrumentation Illumination |
|---|---|
Use Scenario: Outdoor channel letters and dynamic message signs requiring uniform brightness across wide temperature ranges and variable line voltage. IC Role / Device Role / Timing Role: Constant-current sink regulating individual LED segments or parallel strings, operating directly from 12–48V DC rails. Use Value: ±3% current accuracy ensures consistent luminance across modules; 60V output swing supports >15-LED white strings without voltage multiplication. | Use Scenario: Front-panel backlighting and indicator LEDs in medical analyzers, test equipment, and industrial HMIs where color fidelity and long-term stability are critical. IC Role / Device Role / Timing Role: Low-noise, non-switching current source eliminating EMI concerns near sensitive analog circuitry. Use Value: 0.5V RSET minimizes self-heating on compact PCBs; –40°C to +125°C rating ensures reliability in sealed enclosures with no active cooling. |
| Isolated Offline Converters | Linear LED Drivers |
Use Scenario: Secondary-side constant-current regulation in flyback or AC/DC LED drivers where galvanic isolation is required for safety compliance. IC Role / Device Role / Timing Role: Post-regulator sinking current from optocoupler-controlled or auxiliary-winding-powered VCC rail. Use Value: Open-drain LED output tolerates voltage mismatches between primary and secondary sides; UVLO prevents false turn-on during startup transients. | Use Scenario: Cost-sensitive, low-EMI architectural lighting using 24V or 48V distribution with simple resistor-set current control. IC Role / Device Role / Timing Role: Standalone linear driver replacing discrete transistor+resistor solutions with tighter tolerance and thermal robustness. Use Value: Eliminates need for high-wattage sense resistors; 1.47W package rating allows >100mA drive at +85°C ambient with minimal copper area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL5810F-7 | Fixed 120mA output; no RSET pin; lower VCC max (40V); same U-DFN3030-6 package. | Suitable only for fixed-current designs; lacks dimming and adjustable range. | Select when current value is invariant and board space is constrained-no external resistor needed. |
| NSI50010YT1G | 100mA fixed current; 50V max; TO-252 package; higher thermal resistance (θJA ≈ 90°C/W). | Limited to shorter LED strings; less suitable for high-density layouts due to larger footprint. | Choose for legacy designs using DPAK; avoid where 150mA or 60V capability is required. |
Compared with AL5812FF-7, AL5810F-7 trades adjustability for simplicity and reduced BOM count, while NSI50010YT1G offers lower cost but sacrifices voltage headroom, current range, and thermal performance-making AL5812FF-7 optimal for flexible, high-reliability LED current regulation.
Availability
AL5812FF-7 is available at Aetrix Electronics and suitable for LED signage, instrumentation illumination, isolated offline converters, and linear LED drivers requiring stable component supply, RoHS/Green compliance, and extended temperature operation.
Supply support for AL5812FF-7 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, energy-efficient components for power management, signal integrity, and lighting applications.
The AL5812 belongs to Diodes' Linear LED Driver product line, engineered specifically for accurate, thermally robust constant-current regulation in space-constrained, high-reliability lighting systems without switching noise.
FAQ
What is the minimum VCC voltage required for AL5812FF-7 to regulate LED current?
The AL5812FF-7 requires a minimum VCC of 3.5V to operate within specification. Below this, under-voltage lockout engages (~2V threshold), disabling output. For reliable regulation at 150mA with typical LED forward voltage, VCC must exceed the sum of LED string voltage plus overhead (≥1V), ensuring sufficient headroom for the internal pass element.
Can AL5812FF-7 drive LED strings exceeding 60V?
Yes-when configured in high-side mode with VCC tapped from the LED string itself (as shown in Figure 15), the AL5812FF-7 can regulate currents in chains >60V. However, PWM dimming is disabled in this configuration because the RSET pin cannot be referenced to a stable ground when VCC floats with the string voltage.
How does the RSET resistor value affect LED current accuracy and thermal performance?
ILED = 750 / RSET (Ω) yields nominal current; accuracy is ±3% at +25°C and degrades slightly over temperature. Lower RSET values increase current but also raise power dissipation in the IC (P = (VCC − VLED) × ILED). At 150mA and 10V drop, dissipation reaches ~1.5W-requiring proper PCB copper area and thermal vias to stay within the 125°C junction limit.
Is AL5812FF-7 compatible with PWM dimming, and what frequency range is supported?
Yes-the RSET pin accepts PWM signals directly: toggling the RSET-to-GND path modulates LED current linearly. Tested performance shows >95% linearity from 100Hz to 500Hz (Figure 7 & 18). Frequencies above 1kHz may reduce dimming resolution due to internal bandwidth limits; for flicker-free operation, 200–500Hz is recommended with appropriate gate drive rise/fall times.
AL5812FF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UDFN 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:
- U-DFN3030-6
AL5812FF-7 FAQ
1.How can I place an order for AL5812FF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL5812FF-7 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 AL5812FF-7 reliable?
The price and inventory of AL5812FF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5812FF-7 is usually 5 days.
3.What payment methods are accepted for AL5812FF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5812FF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL5812FF-7?
AL5812FF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL5812FF-7 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 AL5812FF-7?
For technical support, including AL5812FF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5812FF-7 requirements.
6.How does Aetrix verify that AL5812FF-7 is sourced from the original manufacturer or authorized distributors?
All AL5812FF-7 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 AL5812FF-7 meets industry standards.
7.What is the process for return or replacement of AL5812FF-7?
All AL5812FF-7 units undergo pre-shipment inspection (PSI). If there is an issue with AL5812FF-7, 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 AL5812FF-7 part is unused and in its original packaging.
Return procedure for AL5812FF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AL5812FF-7 Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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