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Renesas IW1796-39
- Part No.:
- IW1796-39
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- SOT-23-6
- Datasheet:
-
IW1796-39.pdf
- Description:
- HIGH PERFORMANCE AC/DC PRIMARY-S
- Quantity:
- Payment:
- Shipping:
Inventory:3,337
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Product details
Overview
The IW1796-39 from Renesas Electronics is a high-performance AC/DC primary-side PWM controller for rapid charge adapters, supporting XM-Comm transformer-based communication with iW662-03 secondary-side controllers. It delivers multi-level constant voltage/current regulation up to 21V output, achieves <75mW no-load power at 230VAC/5VOUT, and operates in quasi-resonant mode for high efficiency in 45W+ smartphone/tablet charging designs.
For engineers reviewing the IW1796-39 datasheet, IW1796-39 pinout, IW1796-39 application, or IW1796-39 equivalent, key selection criteria include XM-Comm compatibility with iW662-03, 6-lead SOT23-6 package constraints, primary-side CV/CC regulation without optocoupler, <20mW ultra-low no-load capability with external DFET, and support for QC2.0/QC3.0/PE protocols.
Technical Context
The IW1796-39 implements proprietary XM-Comm technology to enable bidirectional transformer-coupled communication-transferring output voltage requests, current limits, and OVP/undershoot data between iW662-03 and itself without optocouplers or auxiliary components. Its quasi-resonant PWM architecture combines load-adaptive maximum constant frequency control with multi-mode (PWM/PFM) operation to optimize size, efficiency, and EMI across full load range.
Primary-side regulation relies on VSENSE pin sampling of auxiliary winding voltage for real-time CV/CC loop control, while CS/CDC pin provides cycle-by-cycle current sensing and cable drop compensation configuration. The GATE pin drives external MOSFETs with 30V max swing, and integrated fault handling supports soft-short detection, non-latching over-current protection, and thermal shutdown at 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | –0.3 V to 45 V: Enables direct connection to rectified AC bus without external LDO. |
| No-Load Power (Typical) | <75 mW at 230 VAC/5 VOUT: Meets stringent EU CoC Tier 2 and DOE VI requirements without active startup circuit. |
| XM-Comm Protocol Support | QC2.0/QC3.0/PE with iW662-03: Enables dynamic voltage step changes (e.g., 5 V → 9 V → 12 V → 20 V) via transformer coupling only. |
| Output Voltage Range | Up to 21 V: Supports USB PD-compatible high-voltage charging profiles in primary-side regulated topologies. |
| Package | SOT23-6: Surface-mount footprint compatible with automated assembly; θJA = 208 °C/W limits continuous power dissipation to ~0.3 W at 50 °C ambient. |
| ESD Rating | ±2000 V HBM: Ensures robustness during board handling and reflow soldering in high-volume adapter manufacturing. |
Pinout & Package
The IW1796-39 is housed in a 6-lead SOT23-6 package with exposed pad for thermal enhancement. Pin 1 (VCC) accepts up to 45 V DC input; Pin 2 (VSENSE) samples auxiliary winding voltage for regulation and XM-Comm demodulation; Pin 3 (MUL) detects auxiliary winding open condition; Pin 4 (CS/CDC) senses primary current and configures cable drop compensation; Pin 5 (GND) is system ground reference; Pin 6 (GATE) delivers 30 V-rated gate drive to external MOSFET.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Power Input | Supplies internal bias; rated to 45 V allows direct connection to bulk capacitor without LDO. |
| VSENSE (Pin 2) | Analog Input | Primary-side feedback input; carries XM-Comm demodulated signals from secondary via transformer. |
| MUL (Pin 3) | Analog Output | Open-winding detection signal; used during startup to verify transformer integrity before enabling switching. |
| CS/CDC (Pin 4) | Analog Input | Current sense + cable compensation configuration; enables 4-level CDC independent of output voltage setting. |
| GND (Pin 5) | Ground | Reference node for all analog and digital circuits; must be low-impedance connection to power ground plane. |
| GATE (Pin 6) | Output | Drives external N-channel MOSFET gate; 30 V rating supports high-side switch configurations with bootstrap supply. |
Key Features
| Feature | Design Value |
|---|---|
| XM-Comm Transformer Communication | Eliminates optocoupler and TL431, reducing BOM count by ≥3 components and improving long-term reliability in rapid charge adapters. |
| Ultra-Low No-Load Power | <75 mW typical (230 VAC/5 VOUT); further reduced to <20 mW with external active start-up DFET-critical for energy certification compliance. |
| Multi-Level CV/CC Regulation | Supports ≥4 discrete output voltage levels (e.g., 5/9/12/20 V) and corresponding current limits without secondary-side feedback circuitry. |
| Soft-Short Fault Handling | Reduces average output power during connector/cable soft shorts without latching, maintaining user experience during intermittent faults. |
| EZ-EMI™ Design | Integrated frequency jittering and optimized gate drive slew rate reduce common-mode noise, easing EMI filter design and lowering system cost. |
Applications
| Smartphone Rapid Charging Adapter | Tablet Fast-Charge Power Supply |
|---|---|
Use Scenario: Wall-mounted USB-C adapter delivering 45W+ output with dynamic voltage negotiation (5V→9V→12V→20V) per QC3.0/PE protocol. IC Role / Device Role / Timing Role: Primary-side PWM controller executing quasi-resonant switching, XM-Comm decoding, and multi-level CV/CC regulation. Use Value: Enables compact, low-cost, high-efficiency design with no optocoupler, meeting global energy standards and supporting smooth voltage transitions. | Use Scenario: 30W tablet charger requiring tight ±3% CV regulation across 5–15V range and fast load transient response under 500 ms. IC Role / Device Role / Timing Role: Primary-side controller managing GATE drive timing, VSENSE-based feedback loop, and XM-Comm command interpretation from iW662-03. Use Value: Delivers <1% CV ripple and <5% CC error across line/load/temperature, eliminating secondary feedback complexity and component aging drift. |
| USB PD-Compatible AC/DC Module | Multi-Protocol Portable Device Charger |
Use Scenario: Modular 20V/3A AC/DC power module used in docking stations and portable monitors with USB PD sink negotiation. IC Role / Device Role / Timing Role: Primary-side regulator implementing XM-Comm-based voltage step commands and cable drop compensation for accurate VBUS delivery. Use Value: Achieves ≤150 mV cable drop compensation at 3 A load, ensuring stable 20 V at device port despite 1.5 m USB-C cable resistance. | Use Scenario: Universal travel charger supporting QC2.0, QC3.0, and proprietary OEM protocols for smartphones, earbuds, and wearables. IC Role / Device Role / Timing Role: Core controller coordinating with iW662-03 to decode protocol-specific voltage/current requests and execute precise primary-side regulation. Use Value: Reduces firmware development effort by offloading protocol logic to hardware-level XM-Comm handshake, enabling single-hardware platform for multiple OEMs. |
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-side PWM IC and optocoupler feedback. | Lacks XM-Comm integration; cannot replace IW1796-39 in optocoupler-free designs. | Select MP6908A only when pairing with existing primary-side controllers (e.g., MP6908A + MP6908A-compatible PWM) and optocoupler-based feedback is acceptable. |
| UCC28780 | TI's active-clamp flyback controller with digital communication interface; supports USB PD but requires external MCU for protocol handling. | Needs external microcontroller and isolated communication channel; higher BOM cost and firmware overhead than XM-Comm solution. | Choose UCC28780 when USB PD 3.0 PPS compliance is mandatory and system-level flexibility justifies added complexity and cost. |
Compared with MP6908A and UCC28780, the IW1796-39 uniquely integrates XM-Comm for optocoupler-free, hardware-accelerated rapid charge protocol execution-reducing component count, simplifying layout, and eliminating firmware dependencies for QC2.0/QC3.0/PE implementations.
Availability
The IW1796-39 is available at Aetrix Electronics and suitable for smartphone rapid chargers, tablet fast-charge supplies, and USB PD-compatible AC/DC modules requiring stable component supply, RoHS-compliant packaging, and full production traceability.
Supply support for IW1796-39 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 products for automotive, industrial, infrastructure, and IoT applications.
The IW1796-39 belongs to Renesas' Rapid Charge™ controller family, engineered specifically for high-efficiency, low-noise, optocoupler-free AC/DC adapters targeting mobile device charging markets.
FAQ
What is the role of the IW1796-39 in an XM-Comm-based rapid charge system?
The IW1796-39 serves as the primary-side PWM controller that receives voltage and current commands from the iW662-03 secondary-side controller via transformer-coupled XM-Comm signals. It executes quasi-resonant switching, multi-level CV/CC regulation, and fault protection-all without optocoupler or secondary feedback circuitry. The IW1796-39 directly interprets XM-Comm data on the VSENSE pin to adjust output parameters in real time, making it essential for seamless QC2.0/QC3.0/PE implementation.
Does the IW1796-39 require an external active start-up circuit to achieve ultra-low no-load power?
The IW1796-39 achieves <75 mW no-load power consumption at 230 VAC/5 VOUT without external components, meeting strict energy regulations. An optional external active start-up DFET reduces this further to <20 mW-valuable for premium-tier adapters targeting highest efficiency certifications. The IW1796-39's RC-charging VCC architecture eliminates need for dedicated start-up resistors, improving reliability and thermal performance over traditional solutions.
Which secondary-side controller is required for XM-Comm compatibility with the IW1796-39?
The IW1796-39 is designed exclusively for use with the iW662-03 secondary-side controller, as specified in Renesas' ordering information table. This pairing enables full XM-Comm functionality-including output voltage step requests, current limit updates, and fault reporting-without additional isolation components. Using any other secondary controller (e.g., iW662-01 or iW662-05) with IW1796-39 will not guarantee correct protocol behavior or XM-Comm interoperability.
How does the IW1796-39 implement cable drop compensation without secondary feedback?
The IW1796-39 uses its CS/CDC pin to configure four independent levels of cable drop compensation based on load current, independent of output voltage setting. During operation, it adjusts regulation setpoints using primary-side current sensing and pre-programmed compensation curves-enabling accurate VBUS delivery at the device port despite voltage loss across USB-C cables. This eliminates need for remote-sense traces or secondary-side compensation circuitry, simplifying PCB layout and reducing cost.
What protection features are built into the IW1796-39 for rapid charge adapter reliability?
The IW1796-39 integrates comprehensive protection including output over-voltage (OVP), output over-current (OCP), soft-short and half-short detection, over-temperature (OTP), and VCC undervoltage lockout (UVLO). Its advanced fault control reduces average output power during soft shorts without latching-preserving user experience during intermittent connector faults. All protections are implemented in hardware with fast response times, ensuring robust operation across environmental stress and manufacturing variations in the IW1796-39.
IW1796-39 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
IW1796-39 FAQ
1.How can I place an order for IW1796-39 through Aetrix?
Please submit a Request for Quotation (RFQ) for IW1796-39 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 IW1796-39 reliable?
The price and inventory of IW1796-39 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW1796-39 is usually 5 days.
3.What payment methods are accepted for IW1796-39?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW1796-39 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW1796-39?
IW1796-39 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW1796-39 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 IW1796-39?
For technical support, including IW1796-39 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW1796-39 requirements.
6.How does Aetrix verify that IW1796-39 is sourced from the original manufacturer or authorized distributors?
All IW1796-39 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 IW1796-39 meets industry standards.
7.What is the process for return or replacement of IW1796-39?
All IW1796-39 units undergo pre-shipment inspection (PSI). If there is an issue with IW1796-39, 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 IW1796-39 part is unused and in its original packaging.
Return procedure for IW1796-39:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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