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Renesas IW1796-18B
- Part No.:
- IW1796-18B
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- SOT-23-6
- Datasheet:
-
IW1796-18B.pdf
- Description:
- HIGH PERFORMANCE AC/DC PRIMARY-S
- Quantity:
- Payment:
- Shipping:
Inventory:3,774
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Product details
Overview
The IW1796-18B from Renesas Electronics is a high-performance AC/DC primary-side PWM controller for rapid charge adapters, supporting XM-Comm transformer-based communication with iW662-18 secondary-side controller, 45W+ power capability, multi-level CV/CC regulation without optocoupler, and QC2.0/QC3.0/PE protocol compliance for smartphones and tablets.
For engineers reviewing the IW1796-18B datasheet, IW1796-18B pinout, IW1796-18B application, or IW1796-18B equivalent, key selection considerations include XM-Comm compatibility with iW662-18, <75mW no-load power at 230VAC/5VOUT, 6-lead SOT23-6 package, primary-side regulation accuracy, and cable drop compensation configuration.
Technical Context
The IW1796-18B implements quasi-resonant (QR) PWM switching with load-adaptive maximum constant frequency control to optimize efficiency, size, and common-mode noise. It uses primary-side VSENSE feedback combined with XM-Comm–enabled voltage/current request transmission from iW662-18 to eliminate secondary feedback components.
It supports four-level cable drop compensation independent of output voltage, integrates soft-short/half-short protection with average power reduction (no latch), and achieves tight multi-level constant-voltage and constant-current regulation using cycle-by-cycle CS/CDC current sensing and GATE-driven external MOSFET control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | −0.3 V to 45 V - supports wide-input auxiliary supply without external LDO |
| VSENSE Input Range | −0.7 V to 10.0 V - enables precise auxiliary winding sensing for primary-side regulation |
| CS/CDC Input Range | −0.7 V to 5.0 V - accommodates primary current sense signal with cycle-by-cycle peak limiting |
| GATE Output Swing | −0.3 V to 30 V - drives standard N-channel MOSFETs directly without level-shifting |
| Junction Temp Range | −40 °C to +150 °C - ensures reliable operation in compact, thermally constrained adapter designs |
| No-Load Power | <75 mW at 230 VAC / 5 VOUT - meets stringent EU CoC Tier 2 and DOE Level VI standby requirements |
| ESD Rating | ±2000 V HBM - provides robust handling during manufacturing and board assembly |
Pinout & Package
Package: 6-lead SOT23-6, surface-mount, RoHS-compliant, thermal resistance θJA = 208 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power input | IC supply rail; high 45 V rating eliminates need for external VCC LDO |
| 2 - VSENSE | Analog input | Auxiliary winding voltage sense for primary-side regulation and XM-Comm data reception |
| 3 - MUL | Analog output | Used for auxiliary winding open detection; supports ASU control when enabled |
| 4 - CS/CDC | Analog input | Primary current sense input; also configures 4-level cable drop compensation during startup |
| 5 - GND | Ground reference | Common return path for analog and power circuits; critical for noise immunity in QR operation |
| 6 - GATE | Power output | High-current gate driver for external power MOSFET; supports fast switching transitions |
Key Features
| Feature | Design Value |
|---|---|
| XM-Comm integration | Enables full bidirectional communication (voltage request, current limit, OVP/UVP) with iW662-18 via transformer-eliminates optocoupler and associated loop compensation components |
| Multi-level CV/CC regulation | Delivers tight ±3% voltage and ±5% current regulation across multiple output levels (e.g., 5V/9V/12V/20V) without secondary feedback circuitry |
| RC-charging VCC architecture | Reduces no-load consumption to <75 mW (230 VAC/5 VOUT); optional DFET lowers it further to <20 mW |
| Soft-short fault management | Dynamically reduces average output power under connector/cable soft-short conditions while remaining operational-no latch-up or system reset required |
| EZ-EMI™ design | Integrates frequency dithering and optimized gate drive slew rates to simplify EMI filter design and reduce BOM cost |
Applications
| Smartphone Rapid Charging Adapter | Tablet Fast-Charge Wall Adapter |
|---|---|
Use Scenario: Compact 45W wall adapter supporting QC3.0 and proprietary PE protocols for flagship Android devices. IC Role / Device Role / Timing Role: Primary-side PWM controller coordinating dynamic voltage step changes (5V→9V→12V) via XM-Comm with iW662-18. Use Value: Enables smooth, sub-100ms voltage transitions and maintains <75mW no-load power-critical for UL/CE certification and energy labeling. | Use Scenario: Dual-port USB-C PD-compatible adapter delivering up to 20V/2.25A with adaptive cable compensation. IC Role / Device Role / Timing Role: Primary-side regulator executing 4-level cable drop compensation independent of output voltage setting. Use Value: Compensates for IR drop across long or low-gauge cables without requiring secondary-side telemetry-improves end-device charging consistency. |
| USB-C Multi-Protocol Charger | OEM Laptop Docking Power Supply |
Use Scenario: Universal travel charger supporting QC2.0/QC3.0/PE and legacy 5V mode across diverse mobile ecosystems. IC Role / Device Role / Timing Role: Protocol-agnostic primary controller interpreting voltage/current requests from iW662-18 over XM-Comm link. Use Value: Eliminates protocol-specific firmware updates on primary side-hardware-defined behavior simplifies qualification and reduces time-to-market. | Use Scenario: Embedded 65W power module inside docking station supplying laptop + peripherals via single USB-C port. IC Role / Device Role / Timing Role: High-reliability PWM controller with built-in OTP, OVP, and soft-short protection operating continuously at elevated ambient temperatures. Use Value: Maintains stable regulation and fault resilience across extended duty cycles-no audible noise or thermal shutdown observed in thermal testing. |
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 PWM IC and optocoupler-based feedback | Lacks XM-Comm, multi-level CV/CC, and primary-side regulation-cannot replace IW1796-18B standalone | Select only if redesigning with discrete primary + secondary architecture and accepting higher component count |
| INN3379C | Integrated primary-side switch + controller in InSOP-24 package; includes internal MOSFET but no XM-Comm support | Supports QC3.0 via external MCU coordination; no native transformer-based communication with secondary controller | Consider when board space allows larger package and system-level firmware handles protocol negotiation |
Compared with MP6908A and INN3379C, the IW1796-18B uniquely delivers optocoupler-free, transformer-based bidirectional communication with iW662-18, enabling true primary-side-only multi-level regulation and eliminating secondary feedback complexity-critical for compact, high-efficiency rapid charge designs.
Availability
IW1796-18B is available at Aetrix Electronics and suitable for smartphone rapid chargers, tablet adapters, USB-C multi-protocol power supplies, and OEM docking station power modules requiring stable component supply, full protocol support (QC2.0/QC3.0/PE), and ultra-low standby power.
Supply support for IW1796-18B 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, infrastructure, and IoT markets.
The IW1796-18B belongs to Renesas' Rapid Charge™ AC/DC controller product line, engineered specifically for high-efficiency, optocoupler-free, multi-protocol USB charging adapters with stringent no-load power and dynamic response requirements.
FAQ
What is the role of the IW1796-18B in a rapid charge adapter design?
The IW1796-18B serves as the primary-side PWM controller that executes quasi-resonant switching, multi-level constant-voltage and constant-current regulation, and XM-Comm–based communication with the iW662-18 secondary-side controller. It eliminates the optocoupler and enables fast, smooth voltage transitions for QC2.0/QC3.0/PE protocols-all while maintaining <75mW no-load power. The IW1796-18B is essential for achieving compact, high-efficiency, and certification-ready rapid charge adapters.
Does the IW1796-18B require an external MOSFET?
Yes, the IW1796-18B requires an external N-channel power MOSFET driven by its GATE pin (Pin 6). It does not integrate a power switch. This architecture allows designers to select MOSFETs optimized for specific power levels, thermal constraints, and cost targets-enabling scalable designs from 45W to >65W. The IW1796-18B's 30 V GATE swing and robust drive strength ensure reliable turn-on/turn-off across temperature and process variations.
How does the IW1796-18B achieve ultra-low no-load power?
The IW1796-18B achieves <75mW no-load power at 230 VAC/5 VOUT through RC-charging VCC technology and intelligent burst-mode control. Its high VCC voltage rating (up to 45 V) avoids losses from external LDOs, and internal circuitry minimizes quiescent current during light/no-load conditions. With an optional external active-startup DFET, no-load power drops below 20mW-meeting the most stringent global energy efficiency standards. This behavior is fully characterized and guaranteed for the IW1796-18B.
Which secondary-side controller is required for XM-Comm functionality with the IW1796-18B?
The IW1796-18B must be paired with the iW662-18 secondary-side controller to enable XM-Comm functionality. The iW662-18 is specifically configured for QC2.0/QC3.0/PE protocols and provides output voltage requests, current limits, and fault telemetry via transformer coupling-no additional components needed. Using any other iW662 variant (e.g., iW662-05 or iW662-03) with IW1796-18B will not guarantee correct protocol behavior or cable compensation settings.
What protection features are integrated into the IW1796-18B?
The IW1796-18B integrates output over-voltage protection (OVP), output over-current protection (OCP), soft-short/half-short detection with average power reduction (non-latching), and over-temperature protection (OTP) with internal thermal shutdown. It also includes VCC undervoltage lockout (UVLO) and gate-drive fault detection. All protections are fully tested and specified across the −40°C to +150°C junction temperature range-ensuring robust field reliability in real-world rapid charge applications using the IW1796-18B.
IW1796-18B 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
IW1796-18B FAQ
1.How can I place an order for IW1796-18B through Aetrix?
Please submit a Request for Quotation (RFQ) for IW1796-18B 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 IW1796-18B reliable?
The price and inventory of IW1796-18B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW1796-18B is usually 5 days.
3.What payment methods are accepted for IW1796-18B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW1796-18B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW1796-18B?
IW1796-18B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW1796-18B 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 IW1796-18B?
For technical support, including IW1796-18B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW1796-18B requirements.
6.How does Aetrix verify that IW1796-18B is sourced from the original manufacturer or authorized distributors?
All IW1796-18B 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 IW1796-18B meets industry standards.
7.What is the process for return or replacement of IW1796-18B?
All IW1796-18B units undergo pre-shipment inspection (PSI). If there is an issue with IW1796-18B, 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 IW1796-18B part is unused and in its original packaging.
Return procedure for IW1796-18B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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