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Diodes Incorporated AL8807AW5-7
- Part No.:
- AL8807AW5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AL8807AW5-7.pdf
- Description:
- IC LED DRIVER RGLTR DIM 1A SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,957
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Product details
Overview
AL8807AW5-7 from Diodes Incorporated is a high-efficiency, low-EMI buck LED driver IC designed for constant-current LED string control in 6V–36V input systems. It delivers up to 1.3A output current (MSOP-8EP), supports >10:1 analog dimming via CTRL pin (0.25V–2.5V), operates up to 1MHz switching frequency, and integrates open-circuit/short-circuit LED protection and over-temperature shutdown. It drives up to 9 white LEDs in series and is used in 12V-powered architectural and industrial LED lamps.
For engineers reviewing the AL8807AW5-7 datasheet, AL8807AW5-7 pinout, AL8807AW5-7 application, or AL8807AW5-7 equivalent, key selection criteria include analog dimming linearity below 10% IOUT, thermal performance with θJA = 69°C/W (MSOP-8EP), SW pin EMI layout constraints, SET resistor accuracy impact on ±5% current regulation, and compatibility with 33µH–220µH inductors across input voltage range.
Technical Context
The AL8807AW5-7 employs a hysteretic (constant-on-time) control architecture that self-adjusts off-time to maintain continuous conduction mode during analog dimming. Its internal 2.5V reference feeds a 50kΩ-resistor-biased CTRL input, enabling direct voltage-controlled current scaling without PWM circuitry.
Switching is implemented via an integrated N-channel MOSFET with RDS(on) = 0.18Ω (typ) in MSOP-8EP, supporting peak switch currents up to 2.5A at <10% duty cycle. The device lacks soft-start circuitry but allows external soft-start implementation via CTRL-to-GND capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 1.3A (MSOP-8EP package); set externally via SET pin resistor; ±5% accuracy over temperature and line. |
| Input Voltage Range | 6V to 36V DC; includes 5.9V startup threshold and 100mV hysteresis for reliable UVLO behavior. |
| Analog Dimming Range | >10:1 (0.25V–2.5V CTRL input); linear current scaling down to ~10% IOUT; reduced accuracy below 0.25V. |
| Switching Frequency | Up to 1MHz (at 100% dimming); increases as VCTRL decreases due to shorter on/off times. |
| Efficiency | Up to 96% at nominal load; dependent on input voltage, LED string VF, and external component selection. |
| Thermal Resistance | θJA = 69°C/W (MSOP-8EP on 51mm×51mm 2oz copper); θJC = 4.3°C/W via exposed pad. |
| Protections | Open-circuit LED detection, LED chain short-circuit response, and thermal shutdown at 150°C with 25°C hysteresis. |
Pinout & Package
AL8807AW5-7 is packaged in MSOP-8EP (exposed pad), RoHS-compliant, halogen-free "Green" molding compound. The exposed pad must be soldered to a GND-connected thermal plane for thermal management and is not intended as primary current return path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 5,6) | Power Switch Node | Connects to inductor and freewheeling diode; requires minimal trace length and tight loop area to suppress EMI. |
| GND (Pins 2,3) | Ground Reference | Dual ground pins reduce impedance; dominant thermal path via Pin 2 per ΨJL = 50°C/W. |
| CTRL (Pin 4) | Analog Dimming Input | Internally biased to 2.5V via 50kΩ; 0.25V–2.5V range sets 10–100% LED current; capacitor here enables soft-start. |
| SET (Pin 1) | Current Sense Reference | Voltage threshold = 100mV (±5%); sets IOUT = 0.1V / RSET; input current ≤22µA ensures minimal error. |
| VIN (Pin 8) | Power Input | Accepts 6–36V; requires ≥2.2µF X7R ceramic decoupling capacitor placed adjacent to pin. |
| EP | Exposed Thermal Pad | Must be soldered to GND plane with ≥4 thermal vias; contributes 90% of thermal dissipation path in MSOP-8EP. |
| N/C (Pin 7) | No Connection | Not internally bonded; may be tied to GND for mechanical stability but carries no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic Control Architecture | Maintains CCM across full dimming range; eliminates need for compensation network and improves transient response vs. current-mode controllers. |
| Controlled Rise/Fall Times | tR = 12ns, tF = 20ns (CL = 15pF); reduces high-frequency EMI harmonics and eases EMC compliance. |
| Integrated Protection Suite | Auto-recovery OVP/OCP via open/short LED detection + non-latching thermal shutdown at 150°C with 25°C hysteresis. |
| Wide Analog Dimming Interface | Direct 0.25V–2.5V CTRL input eliminates external DAC or op-amp; compatible with microcontroller GPIO or potentiometer. |
| High Efficiency at Full Load | 96% peak efficiency achieved with low RDS(on) (0.18Ω typ) and optimized gate drive minimizing switching losses. |
Applications
| Architectural LED Strips | Industrial Panel Lighting |
|---|---|
|
Use Scenario: Constant-current driving of multi-segment RGBW LED strips in commercial ceiling coves and wall washers. IC Role / Device Role / Timing Role: Buck LED driver providing stable 1.3A output with analog dimming synchronized to DALI-2 or 0–10V lighting control signals. Use Value: >10:1 dimming range enables smooth fade-to-black transitions without flicker; 96% efficiency minimizes heat buildup in enclosed aluminum extrusions. |
Use Scenario: High-reliability illumination for control panels in factory automation cabinets operating from 24VDC rails. IC Role / Device Role / Timing Role: LED current regulator with open-circuit fault detection to prevent system-level failure when individual LEDs fail open. Use Value: Integrated OCP/OVP eliminates need for external monitoring circuitry; -40°C to +125°C junction rating ensures operation in uncooled enclosures. |
| 12V Automotive Interior Lamps | Emergency Exit Sign Modules |
|
Use Scenario: Dimmable map lights and footwell illumination powered directly from vehicle battery (9–16V). IC Role / Device Role / Timing Role: Wide-input buck driver accepting raw battery voltage while maintaining regulated LED current despite cold-crank dips. Use Value: 6V startup capability ensures operation during cranking; 1MHz switching allows compact 33µH inductor and small ceramic caps. |
Use Scenario: Self-contained LED exit sign with battery backup, requiring long-life, low-maintenance illumination. IC Role / Device Role / Timing Role: Primary LED driver during AC operation; interfaces with backup battery via OR-ing diode and maintains dimming state during switchover. Use Value: Over-temperature protection prevents thermal runaway during extended battery discharge; RoHS/Green compliance meets UL924 certification requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8860W5-7 | Higher max output current (1.5A), improved dimming linearity below 10%, integrated soft-start, same pinout. | Preferred for new designs requiring tighter dimming accuracy at low light levels or simplified power-up sequencing. | Select AL8860W5-7 if soft-start is required or if dimming below 10% IOUT must maintain ±8% accuracy. |
| AL8861W5-7 | Includes PWM dimming capability alongside analog control; identical thermal and electrical specs otherwise. | Suitable where hybrid dimming (PWM + analog) is needed for flicker-sensitive environments or color mixing. | Choose AL8861W5-7 only if PWM interface is mandatory; adds complexity without benefit in pure analog systems. |
Compared with AL8807AW5-7, AL8860W5-7 improves low-current dimming fidelity and removes external soft-start dependency, while AL8861W5-7 adds PWM support at no efficiency or thermal penalty-making both unsuitable as drop-in replacements unless those features are explicitly required.
Availability
AL8807AW5-7 is available at Aetrix Electronics and suitable for architectural LED strips, industrial panel lighting, and 12V automotive interior lamps requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AL8807AW5-7 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-reliability power management, signal integrity, and lighting solutions for industrial and automotive markets.
The AL8807A belongs to Diodes' high-efficiency LED driver product line, engineered specifically for wide-input, analog-dimmable constant-current applications in space-constrained and thermally demanding lighting systems.
FAQ
What is the maximum LED string voltage supported by AL8807AW5-7?
The AL8807AW5-7 does not specify a fixed maximum LED string voltage; instead, it supports any string whose forward voltage remains below VIN minus dropout (typically ~2V). With 36V max input and typical LED VF ≈ 3.2V, up to nine 3.2V LEDs (28.8V total) can be driven reliably at full load and ambient temperature.
Can AL8807AW5-7 be used with PWM dimming?
No-AL8807AW5-7 supports analog dimming only via the CTRL pin. It lacks dedicated PWM input functionality, internal PWM comparator, or blanking circuitry. Applying PWM to the CTRL pin causes unstable current regulation and potential oscillation; use AL8861W5-7 for true PWM capability.
How does thermal performance differ between SOT25 and MSOP-8EP packages?
MSOP-8EP offers significantly better thermal performance: θJA = 69°C/W versus 250°C/W for SOT25 under standard test conditions. This allows AL8807AW5-7 in MSOP-8EP to sustain 1.3A continuously at +85°C ambient, whereas SOT25 is limited to 1A with aggressive PCB copper and thermal vias.
Is an external Schottky diode required for AL8807AW5-7 operation?
Yes-an external Schottky diode (e.g., D1 in Figure 31) is mandatory for flyback path completion during SW off-time. The AL8807AW5-7 integrates only the high-side switch; omitting the diode causes catastrophic failure due to inductive kickback at the SW pin.
AL8807AW5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 36V
- Voltage - Output:
- 40V
- Current - Output / Channel:
- 1A (Switch)
- Frequency:
- 700kHz
- Dimming:
- Analog
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AL8807AW5-7 FAQ
1.How can I place an order for AL8807AW5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL8807AW5-7 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 AL8807AW5-7 reliable?
The price and inventory of AL8807AW5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL8807AW5-7 is usually 5 days.
3.What payment methods are accepted for AL8807AW5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL8807AW5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL8807AW5-7?
AL8807AW5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL8807AW5-7 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 AL8807AW5-7?
For technical support, including AL8807AW5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL8807AW5-7 requirements.
6.How does Aetrix verify that AL8807AW5-7 is sourced from the original manufacturer or authorized distributors?
All AL8807AW5-7 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 AL8807AW5-7 meets industry standards.
7.What is the process for return or replacement of AL8807AW5-7?
All AL8807AW5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AL8807AW5-7, 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 AL8807AW5-7 part is unused and in its original packaging.
Return procedure for AL8807AW5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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