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Renesas IW1797-16
- Part No.:
- IW1797-16
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- SOT-23-6
- Datasheet:
-
IW1797-16.pdf
- Description:
- AC/DC PRIMARY-SIDE DLNK RAPID CH
- Quantity:
- Payment:
- Shipping:
Inventory:2,711
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Product details
Overview
The IW1797-16 from Renesas Electronics is a primary-side AC/DC rapid charge controller supporting USB Power Delivery and Qualcomm Quick Charge 2.0/3.0 protocols, delivering 10mV voltage step resolution up to 21V, multi-level constant-voltage/constant-current regulation without secondary feedback, and quasi-resonant operation for >90% efficiency in 45W+ adapters.
For engineers reviewing the IW1797-16 datasheet, IW1797-16 pinout, IW1797-16 application, or IW1797-16 equivalent, this device enables precise digital-link-based output control in compact USB-C chargers requiring low no-load power (<75mW), cable-drop compensation, and built-in fault protection including soft-short handling and over-temperature shutdown.
Technical Context
The IW1797-16 implements Dialog's PrimAccurate™ primary-side regulation architecture with DLNK digital communication over a single optocoupler, enabling real-time secondary-to-primary transmission of voltage requests, current limits, undershoot detection, and OVP signals. It uses RC-charged VCC with 45V absolute max rating to eliminate external LDOs.
Its multi-mode PWM/PFM control adapts switching frequency across load conditions while maintaining quasi-resonant operation; proprietary load-adaptive maximum constant frequency ensures optimal EMI, size, and efficiency trade-offs without audible noise across full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Step Resolution | 10mV per step up to 12V; 100mV per step above 12V - enables PPS compliance and fine-grained QC3.0 voltage control |
| No-Load Power (230VAC/5VOUT) | <75mW standard; <20mW with external DFET - meets DOE VI/EU CoC Tier 2 standby requirements |
| Max Output Power Support | ≥45W - suitable for high-power USB-C PD adapters powering laptops and tablets |
| VCC Pin Rating | −0.3V to +45V - eliminates need for external VCC LDO and reduces BOM count |
| Operating Junction Temp | −40°C to +150°C - supports industrial-grade thermal reliability in enclosed adapter designs |
| Thermal Resistance θJA | 208°C/W - defines heatsinking requirement for SOT23-6 package at full load |
Pinout & Package
The IW1797-16 is housed in a 6-lead SOT23-6 package with exposed pad for thermal enhancement and standard surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power Input | IC supply rail; accepts up to 45V DC; powers internal circuitry and gate driver |
| 2 - VSENSE | Analog Input | Auxiliary winding sense input for primary-side CV regulation and line compensation |
| 3 - DLNK | Analog Output | Digital Link signal output; carries bidirectional rapid charge data via optocoupler interface |
| 4 - CS/CDC | Analog Input | Primary current sense input for cycle-by-cycle peak-current limiting and CDC configuration |
| 5 - GND | Ground Reference | Common return path for analog and power sections; connects to primary-side ground plane |
| 6 - GATE | Power Output | High-side MOSFET gate driver output; drives external super-junction FET in QR flyback topology |
Key Features
| Feature | Design Value |
|---|---|
| DLNK Digital Communication | Single-optocoupler interface transmits voltage request, current limit, undershoot, and OVP from secondary - removes need for TL431 + opto feedback loop |
| Multi-Level CV/CC Regulation | Primary-side only, no secondary feedback required - simplifies transformer design and improves transient response |
| Cable Drop Compensation | User-configurable 4-level compensation independent of output voltage - maintains target VBUS at connector under varying cable resistance |
| Soft-Short Fault Handling | Reduces average output power during soft/half shorts without latching - prevents thermal runaway in damaged cables or connectors |
| Quasi-Resonant + Adaptive PWM/PFM | Optimizes switching frequency per load to maximize efficiency across 0–100% load range while eliminating audible noise |
Applications
| USB-C PD Laptop Adapters | QC3.0 Smart Phone Chargers |
|---|---|
Use Scenario: 65W USB-C PD adapter for ultrabooks with programmable power supply (PPS) support. IC Role / Device Role / Timing Role: Primary-side controller managing VBUS negotiation, dynamic voltage stepping, and tight CV/CC regulation via DLNK link. Use Value: Enables 10mV-step PPS transitions and <75mW no-load power - critical for EU CoC Tier 2 and USB-IF certification. | Use Scenario: Compact 18W wall charger implementing Qualcomm Quick Charge 3.0 with 200mV voltage increments. IC Role / Device Role / Timing Role: Primary-side rapid charge controller coordinating with iW657P secondary to deliver smooth 3.6V–12V transitions. Use Value: Eliminates secondary feedback components and achieves <20mW no-load with optional DFET - reduces BOM cost and board area by >30%. |
| Multi-Protocol Travel Adapters | Industrial Portable Device Chargers |
Use Scenario: Dual-port travel adapter supporting USB PD, QC2.0/3.0, and Apple 2.4A simultaneously. IC Role / Device Role / Timing Role: Primary controller interpreting protocol-specific voltage/current commands from secondary via DLNK and adapting PWM timing accordingly. Use Value: Backward compatibility with legacy QC protocols plus forward compatibility with USB PD 3.0 PPS - extends product lifecycle across multiple device generations. | Use Scenario: Ruggedized field charger for medical handhelds requiring stable 5V/9V/12V outputs and robust fault immunity. IC Role / Device Role / Timing Role: Primary-side regulator enforcing over-voltage, over-current, and over-temperature protection with non-latching soft-short response. Use Value: Built-in single-point fault protections and −40°C to +150°C operation ensure reliability in uncontrolled environments without external supervision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar primary-side rapid charge controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6908A | Secondary-side synchronous rectifier controller only; requires separate primary controller and opto feedback | Cannot replace IW1797-16 standalone - used downstream in same system, not as functional alternative | Select only when designing hybrid DLNK + SR architecture where IW1797-16 handles primary control and MP6908A manages rectification |
| INN3379C | Integrated primary-side controller + HV switch + SR driver in InnoSwitch3 family; no DLNK interface; uses FluxLink isolation | Supports USB PD but lacks 10mV PPS resolution and QC3.0 200mV stepping; fixed 5V/9V/15V/20V outputs | Choose INN3379C for simplified single-chip integration where DLNK protocol flexibility and fine voltage control are not required |
Compared with MP6908A and INN3379C, the IW1797-16 uniquely delivers DLNK-based digital voltage/current command reception with 10mV resolution, enabling true PPS compliance and seamless QC3.0 implementation without sacrificing primary-side control precision or requiring secondary feedback components.
Availability
IW1797-16 is available at Aetrix Electronics and suitable for USB-C PD laptop adapters, QC3.0 smartphone chargers, and multi-protocol travel adapters requiring stable component supply, long-term lifecycle support, and certified rapid charge compliance.
Supply support for IW1797-16 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 is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and consumer markets with emphasis on energy efficiency and system integration.
The IW1797-16 belongs to Renesas' acquired Dialog Semiconductor AC/DC rapid charge controller product line, engineered specifically for high-efficiency, digitally programmable USB-C power adapters with minimal external components and robust fault resilience.
FAQ
What is the primary function of the IW1797-16 in an AC/DC power supply?
The IW1797-16 serves as a primary-side rapid charge controller that replaces traditional optocoupler-based feedback loops by receiving digital voltage and current commands via Dialog's DLNK protocol. It performs tight multi-level constant-voltage and constant-current regulation directly on the primary side, enabling USB PD and QC3.0 compliance without secondary-side feedback components. This architecture reduces component count and improves reliability in the IW1797-16-based design.
Does the IW1797-16 require an external optocoupler for communication with the secondary side?
Yes, the IW1797-16 uses a single optocoupler to implement the DLNK digital communication link between the secondary-side controller (e.g., iW657P) and itself. The DLNK signal on pin 3 carries bidirectional rapid charge information - including voltage requests, current limits, undershoot detection, and over-voltage status - eliminating the need for separate feedback paths. This optocoupler is mandatory for full IW1797-16 functionality.
What is the minimum voltage step resolution supported by the IW1797-16 for USB PD Programmable Power Supply (PPS)?
The IW1797-16 supports 10mV voltage step resolution for VBUS ≤ 12V and 100mV steps for 12V < VBUS ≤ 21V, meeting USB PD 3.0 PPS specification requirements. This fine-grained control enables precise voltage matching to mobile device demands during dynamic charging, reducing heat generation and improving efficiency. The IW1797-16 achieves this resolution natively without firmware updates or external DACs.
How does the IW1797-16 achieve ultra-low no-load power consumption?
The IW1797-16 employs RC-charging VCC technology to reduce no-load power to <75mW at 230VAC/5VOUT, with margin for regulatory compliance. Adding an external active-startup DFET further lowers consumption to <20mW. Its high VCC pin rating (up to 45V) eliminates the need for an external LDO, and its multi-mode PWM/PFM control minimizes switching losses at light loads - all contributing to the IW1797-16's industry-leading standby performance.
Can the IW1797-16 operate without a secondary-side controller?
No, the IW1797-16 is designed exclusively for use with Dialog/Renesas DLNK-compatible secondary-side controllers such as iW657P (for USB PD) or iW676 (for synchronous rectification). It relies on DLNK communication for all rapid charge decisions - voltage setting, current limiting, and fault reporting - and cannot function autonomously. Standalone operation or pairing with non-DLNK secondaries is not supported in the IW1797-16 datasheet or reference designs.
IW1797-16 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Applications:
- Power Supply Controller
- Voltage - Input:
- -
- Voltage - Supply:
- 45V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
IW1797-16 FAQ
1.How can I place an order for IW1797-16 through Aetrix?
Please submit a Request for Quotation (RFQ) for IW1797-16 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 IW1797-16 reliable?
The price and inventory of IW1797-16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW1797-16 is usually 5 days.
3.What payment methods are accepted for IW1797-16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW1797-16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW1797-16?
IW1797-16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW1797-16 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 IW1797-16?
For technical support, including IW1797-16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW1797-16 requirements.
6.How does Aetrix verify that IW1797-16 is sourced from the original manufacturer or authorized distributors?
All IW1797-16 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 IW1797-16 meets industry standards.
7.What is the process for return or replacement of IW1797-16?
All IW1797-16 units undergo pre-shipment inspection (PSI). If there is an issue with IW1797-16, 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 IW1797-16 part is unused and in its original packaging.
Return procedure for IW1797-16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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