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Renesas IW1791-05
- Part No.:
- IW1791-05
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- -
- Datasheet:
-
IW1791-05.pdf
- Description:
- AC/DC PRIMARY-SIDE RAPID CHARGE
- Quantity:
- Payment:
- Shipping:
Inventory:1,630
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Product details
Overview
The iW1791-05 from Renesas Electronics is a primary-side AC/DC PWM controller for rapid charge applications, supporting USB Power Delivery (USB PD) and Qualcomm Quick Charge 2.0/3.0 protocols. It delivers high-resolution voltage/current control with 10mV DLNK step resolution, multi-level CV/CC regulation without secondary feedback, and <20mW no-load power consumption at 230VAC with 5V output.
For engineers reviewing the iW1791-05 datasheet, iW1791-05 pinout, iW1791-05 application, or iW1791-05 equivalent, key selection considerations include its SOIC-8 package, DLNK-based digital communication with secondary controllers, source-charging VCC startup, quasi-resonant operation, and support for 3.6–12V QC3.0 output in 200mV increments.
Technical Context
The iW1791-05 implements Renesas' PrimAccurate™ technology for primary-side regulation, eliminating loop compensation components while maintaining stability across line/load/temperature. Its proprietary DLNK protocol enables bidirectional digital communication-including output voltage requests, current limits, undershoot detection, and OVP-over a single optocoupler.
It operates in quasi-resonant mode with load-adaptive maximum constant-frequency PWM switching, supports multi-mode PWM/PFM control, and integrates SmartDefender+™ for soft-short mitigation without latching. The device uses source-charging VCC technology to achieve ultra-low standby power and eliminates external active start-up circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | −0.3 V to 45.0 V - supports wide-input auxiliary supply without external LDO |
| DLNK Voltage Step | 10 mV - enables precise USB PD Programmable Power Supply (PPS) compliance |
| No-Load Power | <20 mW at 230VAC/5V output - meets stringent EU CoC Tier 2 and DOE Level VI |
| Operating Temp | −40 °C to +150 °C junction - suitable for enclosed high-power adapters |
| Max Junction Temp | 150 °C - defines thermal derating boundary for continuous operation |
| ESD Rating | ±2000 V HBM - ensures robustness during board handling and assembly |
| Thermal Resistance | 160 °C/W (θJA) - informs heatsink and PCB copper area requirements |
Pinout & Package
The iW1791-05 is housed in an 8-lead SOIC-8 package with standard 1.27 mm pitch and exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary-side power ground return for all internal circuits and gate driver |
| DLNK (Pin 2) | Digital link input | Receives bidirectional rapid-charge commands (voltage request, OVP, undershoot) via optocoupler-coupled DLNK signal |
| VSENSE (Pin 3) | Auxiliary winding sense | Enables primary-side output voltage regulation and supports DLNK communication through transformer coupling |
| CFG (Pin 4) | Configuration input | Sets cable drop compensation level and enables auxiliary winding open-circuit protection |
| ISENSE (Pin 5) | Current sense input | Monitors primary MOSFET peak current for cycle-by-cycle CC regulation and over-current protection |
| SOURCE (Pin 6) | Power input | Connects to MOSFET source; internally drives VCC charging circuit during startup |
| GATE (Pin 7) | Gate driver output | Drives external N-channel MOSFET switch with integrated dead-time control and shoot-through prevention |
| VCC (Pin 8) | IC power supply | Accepts up to 45 V DC; high rating eliminates need for external VCC LDO regulator |
Key Features
| Feature | Design Value |
|---|---|
| Source-charging VCC startup | Eliminates external active start-up circuit while achieving <20 mW no-load power |
| DLNK digital communication | Single optocoupler transmits voltage request, current limit, undershoot, and OVP data from secondary to primary |
| Multi-level CV/CC regulation | Tight output control without optocoupler-based feedback loop or compensation network |
| SmartDefender+™ fault response | Reduces average output power during soft shorts (e.g., damaged cables) without latching shutdown |
| 4-level cable drop compensation | User-configurable compensation independent of output voltage setting, improving load regulation accuracy |
Applications
| USB PD Rapid Charging Adapter | QC3.0-Compatible Wall Charger |
|---|---|
Use Scenario: Compact 27W–65W USB-C wall adapter powering smartphones and tablets with dynamic PPS voltage stepping. IC Role / Device Role / Timing Role: Primary-side PWM controller managing quasi-resonant switching, DLNK-based voltage negotiation, and multi-level CC regulation. Use Value: Enables 10mV PPS resolution and sub-20mW no-load power, meeting IEC 62368-1 and ENERGY STAR® v3.0 requirements. | Use Scenario: Dual-port travel charger delivering 5V/9V/12V under QC3.0 with 200mV fine-grained voltage transitions. IC Role / Device Role / Timing Role: Primary-side controller coordinating with iW657P/iW676 secondary chipset to execute fast voltage ramping and cable compensation. Use Value: Achieves smooth 200mV-step transitions and maintains ±1% CV accuracy across temperature and line variations. |
| Direct-Charge Enabled Adapter | Industrial Portable Device Charger |
Use Scenario: High-efficiency 45W direct-charge adapter for laptops and power banks using proprietary voltage negotiation. IC Role / Device Role / Timing Role: Primary-side controller configured for Direct Charge mode (iW1791-05B variant), disabling kCC ramp-up for fixed-current delivery. Use Value: Eliminates unnecessary CC ramping overhead, improving transient response and reducing thermal stress on secondary rectifier. | Use Scenario: Ruggedized medical or test equipment charger requiring reliable rapid-charge capability and extended temperature operation. IC Role / Device Role / Timing Role: Primary-side controller operating from −40°C to +150°C junction, implementing latch-free SmartDefender+™ for connector fault resilience. Use Value: Maintains safe operation during intermittent short conditions without system reset, enhancing field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar primary-side rapid-charge PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6908A | Supports SR control only; requires external primary controller; no DLNK or PPS support | Limited to QC2.0 and basic CV/CC; no USB PD PPS or 10mV resolution | Choose when cost-sensitive QC2.0-only designs use discrete primary + SR architecture |
| UCC28780 | TI's active-clamp flyback controller with HV startup; supports USB PD but lacks DLNK and 10mV PPS | Requires full secondary feedback loop; higher BOM count and layout complexity | Prefer when active-clamp topology is mandated and DLNK integration is not required |
Compared with MP6908A and UCC28780, the iW1791-05 uniquely integrates DLNK-based digital communication, 10mV PPS resolution, and source-charging VCC to reduce component count and enable <20mW no-load power-making it optimal for compact, standards-compliant USB PD/QC3.0 adapters.
Availability
iW1791-05 is available at Aetrix Electronics and suitable for USB PD rapid charging adapters, QC3.0 wall chargers, and industrial portable device chargers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for iW1791-05 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC products for automotive, industrial, infrastructure, and IoT applications.
The iW1791-05 belongs to Renesas' Rapid Charge™ AC/DC controller family, designed specifically for high-efficiency, low-noise, digitally negotiated USB PD and QC3.0 power supplies targeting mobile and portable electronics.
FAQ
What is the primary function of the iW1791-05 in a USB PD power supply?
The iW1791-05 serves as the primary-side PWM controller in USB PD power supplies, executing quasi-resonant switching, multi-level constant-voltage/constant-current regulation, and DLNK-based digital communication with the secondary-side controller. It enables 10mV PPS voltage steps and achieves <20mW no-load power-critical for iW1791-05-based adapters meeting international energy efficiency standards.
Does the iW1791-05 require an external optocoupler for feedback?
No-the iW1791-05 uses Renesas' DLNK protocol to transmit rapid-charge information (voltage requests, OVP, undershoot) over a single optocoupler, eliminating traditional secondary-side feedback loops and compensation networks. This architecture reduces BOM count and improves stability, making the iW1791-05 ideal for compact, high-reliability USB PD designs.
How does the iW1791-05 achieve ultra-low no-load power consumption?
The iW1791-05 employs source-charging VCC technology that charges the IC's VCC capacitor directly from the MOSFET source during startup, removing the need for an external active start-up circuit. Combined with multi-mode PWM/PFM control and optimized quiescent current, this enables <20mW no-load power at 230VAC with 5V output-a key feature of the iW1791-05 for energy-regulated markets.
What is the significance of the 10mV DLNK voltage step in the iW1791-05?
The 10mV DLNK voltage step allows the iW1791-05 to meet USB PD Programmable Power Supply (PPS) specifications, enabling precise, real-time voltage adjustments requested by compatible devices. This resolution supports tighter regulation during dynamic load changes and is a distinguishing capability of the iW1791-05 versus legacy QC2.0 controllers limited to 200mV steps.
Can the iW1791-05 be used without a Renesas secondary-side controller?
The iW1791-05 is optimized for use with Renesas' DLNK-compatible secondary controllers (e.g., iW657P) and relies on their proprietary digital link for voltage/current negotiation and protection signaling. While basic CV/CC operation may be possible with non-DLNK secondaries, full USB PD PPS, QC3.0, and SmartDefender+™ features require the iW1791-05 paired with a Renesas secondary-side controller.
IW1791-05 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Applications:
- -
- Voltage - Input:
- -
- Voltage - Supply:
- -
- Current - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
IW1791-05 FAQ
1.How can I place an order for IW1791-05 through Aetrix?
Please submit a Request for Quotation (RFQ) for IW1791-05 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 IW1791-05 reliable?
The price and inventory of IW1791-05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW1791-05 is usually 5 days.
3.What payment methods are accepted for IW1791-05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW1791-05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW1791-05?
IW1791-05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW1791-05 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 IW1791-05?
For technical support, including IW1791-05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW1791-05 requirements.
6.How does Aetrix verify that IW1791-05 is sourced from the original manufacturer or authorized distributors?
All IW1791-05 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 IW1791-05 meets industry standards.
7.What is the process for return or replacement of IW1791-05?
All IW1791-05 units undergo pre-shipment inspection (PSI). If there is an issue with IW1791-05, 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 IW1791-05 part is unused and in its original packaging.
Return procedure for IW1791-05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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