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Diodes Incorporated AL17051V5W5-7
- Part No.:
- AL17051V5W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- AC DC Converters, Offline Switches
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AL17051V5W5-7.pdf
- Description:
- LED HV INT SWITCH SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,344
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Product details
Overview
AL17051V5W5-7 from Diodes Incorporated is a universal AC-input, high-voltage buck converter IC with integrated 700V MOSFET, delivering regulated 5V output at up to 50mA, ultra-low 10mW no-load standby power, and 60% system efficiency at full load across 85–300VAC input - designed for always-on IoT power supplies requiring WPAN connectivity.
For engineers reviewing the AL17051V5W5-7 datasheet, AL17051V5W5-7 pinout, AL17051V5W5-7 application, or AL17051V5W5-7 equivalent, this device serves as a self-contained, optocoupler-free offline regulator optimized for low-BOM-count, space-constrained, low-standby-power applications in home appliances and industrial controls.
Technical Context
The AL17051V5W5-7 implements constant-voltage (CV) control in Discontinuous Conduction Mode (DCM), using internal VCC voltage sampling to derive output feedback - eliminating need for external optocoupler or secondary-side sensing. Its adaptive switching frequency (33kHz typical, decreasing under light load) and programmable minimum off-time (18.5µs) jointly enable high light-load efficiency (50% at 10mA).
It integrates protection logic including auto-restart over-current (SCP) and over-load (OLP) fault handling, thermal shutdown at +150°C with 50°C hysteresis, and UVLO with 150mV hysteresis between 2.68V (ON) and 2.83V (OFF) thresholds - all coordinated via internal control logic driving the embedded 700V/40Ω MOSFET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–300VAC universal mains input - supports global deployment without hardware reconfiguration. |
| Output Voltage | Fixed 5V ±3% - factory-trimmed reference enables stable regulation without external resistor divider. |
| Max Output Current | 50mA - sufficient for low-power microcontrollers, BLE/Wi-Fi modules, and sensor nodes. |
| No-Load Standby Power | <10mW - meets Energy Star Level VI and EU CoC Tier 2 requirements for always-on IoT devices. |
| Peak Efficiency | 60% at 50mA / 230VAC - achieved via DCM operation and integrated MOSFET minimizing conduction and switching losses. |
| Integrated MOSFET | 700V VDSS, 40Ω RDS(ON) - eliminates external HV switch, reduces BOM count and PCB footprint. |
| Thermal Protection | +150°C shutdown with +50°C hysteresis - prevents thermal runaway during overload or poor heatsinking. |
Pinout & Package
AL17051V5W5-7 is housed in a thermally enhanced SOT25 package (5-pin, surface-mount) with exposed drain pad for improved heat dissipation and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Control supply rail | Internal bias voltage source; charged by HV regulator; triggers startup at 2.83V and shuts down at 2.7V. |
| 2,3,4 - SOURCE | MOSFET source node / GND reference | Common ground return for internal power stage and control circuitry; electrically tied to PCB ground plane. |
| 5 - DRAIN | High-voltage MOSFET drain | Primary HV input node; connects directly to rectified mains via input filter; carries full switching current. |
Key Features
| Feature | Design Value |
|---|---|
| Optocoupler-free regulation | VCC-sampled feedback eliminates isolation barrier components, reducing cost and improving long-term reliability. |
| Adaptive frequency control | Switching frequency drops under light load to maintain 50% efficiency at 10mA - critical for sleep-mode energy budgeting. |
| Auto-restart protection | SCP and OLP faults trigger controlled recovery cycles (512 HV-regulator on/off cycles) instead of latching shutdown. |
| Leading-edge blanking | 300ns internal blanking window prevents false current-limit triggering during MOSFET turn-on spikes. |
| Soft-start with dynamic tMINOFF | Minimum off-time extends during startup to ensure safe demagnetization before regulation stabilizes. |
Applications
| Smart Home Sensors | Industrial Remote I/O Modules |
|---|---|
|
Use Scenario: Battery-less occupancy/motion sensors powered directly from AC mains in lighting circuits. IC Role / Device Role / Timing Role: Primary offline regulator providing clean 5V rail to ultra-low-power MCU and PIR sensor ASIC. Use Value: 10mW standby enables >10-year lifetime without battery replacement while maintaining instant wake-up responsiveness. |
Use Scenario: DIN-rail mounted remote analog input modules monitoring temperature/pressure in factory environments. IC Role / Device Role / Timing Role: Isolation-free local power supply converting 230VAC to 5V for signal conditioning and RS-485 transceivers. Use Value: Integrated 700V MOSFET and DCM operation eliminate need for external HV FET and reduce component count by ≥4 vs discrete solutions. |
| Wireless Thermostats | White Goods Control Boards |
|
Use Scenario: Wi-Fi-enabled HVAC thermostats drawing power from 24VAC transformer or direct 120VAC tap. IC Role / Device Role / Timing Role: Mains-connected buck converter powering ESP32-based wireless stack and display driver. Use Value: 60% full-load efficiency and 50% light-load efficiency minimize heat buildup inside sealed plastic enclosures. |
Use Scenario: Main control board in refrigerators or washing machines requiring always-on real-time clock and network connectivity. IC Role / Device Role / Timing Role: Standby power manager delivering regulated 5V to microcontroller and communication ICs during appliance idle state. Use Value: Thermal shutdown with 50°C hysteresis ensures safe operation despite ambient temperatures up to +105°C near compressor/motor zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP174GJ-Z (Monolithic Power) | Requires external HV MOSFET; 650V rating; no integrated VCC sampling - needs optocoupler feedback loop. | Suitable only where design allows optocoupler-based isolation and higher BOM count is acceptable. | Select when secondary-side regulation precision >±1% is required, or when existing layout accommodates external FET placement. |
| LNK3206D (Power Integrations) | Off-line flyback controller with integrated 725V MOSFET; requires transformer; no DCM buck topology support. | Used where galvanic isolation is mandatory (e.g., user-accessible interfaces); not drop-in compatible. | Choose only if safety certification (UL/EN62368) demands reinforced isolation - incompatible with AL17051's direct-buck architecture. |
Compared with MP174GJ-Z and LNK3206D, the AL17051V5W5-7 uniquely delivers optocoupler-free, transformerless 5V regulation in a 5-pin SOT25 package - reducing bill-of-materials by ≥3 components and enabling sub-1cm² PCB area for always-on IoT edge nodes.
Availability
AL17051V5W5-7 is available at Aetrix Electronics and suitable for smart home sensors, industrial remote I/O modules, and white goods control boards requiring stable component supply with guaranteed long-term manufacturability.
Supply support for AL17051V5W5-7 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 ICs, specializing in high-performance, high-reliability power management and signal integrity solutions.
The AL17051 belongs to Diodes' HV offline regulator product line - engineered specifically for cost-sensitive, space-constrained, always-on IoT and appliance applications needing ultra-low standby power and minimal external components.
FAQ
What is the maximum recommended output current for AL17051V5W5-7?
The AL17051V5W5-7 is rated for continuous 50mA output current per datasheet Recommended Operating Conditions. Exceeding this risks triggering Over Load Protection (OLP) after 8192 switching cycles, causing auto-restart behavior. Peak inductor current is internally limited to 140mA, supporting up to 60mA in short bursts under ideal thermal conditions.
Does AL17051V5W5-7 require an external feedback resistor divider?
No. The AL17051V5W5-7 uses internal VCC voltage sampling to derive output regulation - eliminating the need for external resistors or optocouplers. Its 5V output version has factory-trimmed internal reference (5.22–5.48V), making it a true single-component solution for fixed 5V applications.
How does AL17051V5W5-7 achieve ultra-low 10mW standby power?
It combines three design elements: (1) deep DCM operation at no load, reducing switching frequency to ~1kHz; (2) quiescent current of just 88µA in non-switching mode; and (3) automatic HV regulator disable once VCC reaches 2.83V, cutting off high-voltage supply current to <6µA leakage.
Can AL17051V5W5-7 be used with full-wave rectification?
Yes. The datasheet specifies input capacitor selection guidelines for both half-wave (2.2µF) and full-wave (1µF) rectifiers. Full-wave use improves input voltage hold-up and reduces ripple, but requires verifying that minimum DC bus voltage stays above 70V to prevent thermal shutdown during low-line operation.
AL17051V5W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Non-Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 700V
- Topology:
- Buck
- Voltage - Start Up:
- 3.05 V
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 6.5V
- Duty Cycle:
- -
- Frequency - Switching:
- -
- Power (Watts):
- -
- Fault Protection:
- Current Limiting, Over Load, Over Temperature, Over Voltage, UVLO
- Control Features:
- Soft Start
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-25
- Mounting Type:
- Surface Mount
AL17051V5W5-7 FAQ
1.How can I place an order for AL17051V5W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL17051V5W5-7 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 AL17051V5W5-7 reliable?
The price and inventory of AL17051V5W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL17051V5W5-7 is usually 5 days.
3.What payment methods are accepted for AL17051V5W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL17051V5W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL17051V5W5-7?
AL17051V5W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL17051V5W5-7 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 AL17051V5W5-7?
For technical support, including AL17051V5W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL17051V5W5-7 requirements.
6.How does Aetrix verify that AL17051V5W5-7 is sourced from the original manufacturer or authorized distributors?
All AL17051V5W5-7 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 AL17051V5W5-7 meets industry standards.
7.What is the process for return or replacement of AL17051V5W5-7?
All AL17051V5W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AL17051V5W5-7, 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 AL17051V5W5-7 part is unused and in its original packaging.
Return procedure for AL17051V5W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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