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Renesas IW3688-01
- Part No.:
- IW3688-01
- Manufacturer:
- Renesas
- Category:
- LED Drivers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IW3688-01.pdf
- Description:
- IC LED DRIVER OFFL PWM 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,312
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Product details
Overview
The iW3688-01 from Renesas Electronics is a single-stage, digital AC/DC power controller IC designed for dimmable LED drivers operating from 230VAC input up to 14W output. It integrates primary-side sensing (PrimAccurate™), quasi-resonant switching, and real-time dimmer detection for leading-edge, trailing-edge, and smart dimmers. It delivers ±5% LED current regulation without optocoupler or auxiliary winding.
For engineers reviewing the iW3688-01 datasheet, iW3688-01 pinout, iW3688-01 application, or iW3688-01 equivalent, this controller enables compact, high-PF (>0.92), low-THD (<20%) LED driver designs with fast dimmer transient response, no-loop-compensation requirements, and full protection suite including open/short LED, over-voltage, and over-temperature foldback.
Technical Context
The iW3688-01 implements cycle-by-cycle waveform analysis to identify dimmer type and dynamically adjust input impedance-enabling stable operation across R-type, R-L, R-C, and digital smart dimmers. Its digital control loop manages both dimming interface and power conversion in a single-stage buck-boost or flyback topology.
It uses PrimAccurate™ primary-side sensing to regulate LED current under varying AC line (45–66Hz) and LED forward voltage conditions. The IC integrates current sink, VCC charging, and MOSFET gate drive functions, eliminating external compensation components and auxiliary windings while maintaining stability across -40°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 230VAC nominal; supports universal line frequency 45–66Hz - enables global deployment without hardware change. |
| Max Output Power | 14W - optimized for retrofit lamps and compact luminaires requiring high PF and low THD. |
| Power Factor | >0.92 - meets IEC61000-3-2 Class C requirements without active PFC stage. |
| THD | <20% - reduces harmonic stress on upstream distribution infrastructure. |
| LED Current Regulation | ±5% - achieved via PrimAccurate™ primary-side sensing, eliminating optocoupler and secondary feedback. |
| Dimming Range | 1%–100% - supports deep dimming with smooth transition and no flicker at low levels. |
| Start-up Time | <0.5s (no dimmer) - ensures rapid system readiness in commercial lighting applications. |
Pinout & Package
Package: 14-lead SOIC-14 (JEDEC MS12F compliant, RoHS/Halide-free, MSL-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Rectified AC line input | Direct connection to bulk capacitor node; senses line voltage for dimmer detection and timing. |
| CFG2, CFG1, CFG3, CFG4 (Pins 2,3,10,11) | Configuration inputs | Resistor-programmable pins setting dimming mode, OTP threshold, and startup behavior - no firmware required. |
| VCC (Pin 4) | Internal supply rail | Powered by integrated charge pump; eliminates need for external bias winding or auxiliary supply. |
| AGND / PGND (Pins 5,6) | Signal / power ground | Separate analog and power ground paths minimize noise coupling into sensitive current/voltage sense circuits. |
| ISENSE (Pin 7) | Primary current sense | Connects to current-sense resistor in source path of main MOSFET - enables cycle-by-cycle peak current limiting. |
| VS (Pin 8) | MOSFET source monitor | Enables valley-switching detection for quasi-resonant operation - improves efficiency and EMI. |
| VD (Pin 13) | MOSFET drain monitor | Used for over-voltage protection and resonant timing - supports safe operation during line surges. |
| VCB (Pin 14) | Post-EMI filter voltage | Monitors bulk capacitor voltage after EZ-EMI® filter - enables adaptive EMI reduction without extra components. |
Key Features
| Feature | Design Value |
|---|---|
| Digital dimmer detection & impedance matching | Real-time classification of leading-edge, trailing-edge, and smart dimmers - eliminates manual configuration and ensures flicker-free dimming. |
| PrimAccurate™ primary-side sensing | ±5% LED current accuracy across line/load variations - removes optocoupler, TL431, and secondary-side circuitry. |
| EZ-EMI® integrated filtering | Reduces external EMI filter component count - simplifies layout and lowers BOM cost without compromising compliance. |
| No auxiliary winding requirement | Integrated VCC charge pump powers controller directly from bulk rail - enables use of off-the-shelf inductors and eliminates custom magnetics. |
| Comprehensive protection suite | Includes LED open/short, ISENSE fault, AC over-voltage, over-current, and thermal foldback - ensures robust field reliability. |
Applications
| Dimmable LED Retrofit Lamps | Commercial LED Downlights |
|---|---|
|
Use Scenario: Replacement of incandescent/halogen bulbs in residential and office wall sockets with 230VAC supply. IC Role / Device Role / Timing Role: Single-stage AC/DC controller managing dimmer interface, power conversion, and LED current regulation in one IC. Use Value: Enables 14W output with >85% efficiency, <0.5s start-up, and seamless compatibility with legacy wall dimmers - no redesign needed. |
Use Scenario: Integrated ceiling-mounted downlights in retail and hospitality environments requiring smooth 1–100% dimming. IC Role / Device Role / Timing Role: Digital power controller executing real-time dimmer waveform analysis and quasi-resonant switching control. Use Value: Delivers ±5% current regulation and <20% THD - ensuring consistent light quality and compliance with EN61000-3-2 Class C. |
| Smart Home LED Modules | Industrial LED Task Lighting |
|
Use Scenario: LED modules interfacing with Zigbee/Z-Wave smart dimmers in connected home ecosystems. IC Role / Device Role / Timing Role: Adaptive digital controller detecting and responding to digital dimmer protocols without external MCU. Use Value: Supports digital smart dimmer recognition natively - eliminates protocol translation firmware and external logic. |
Use Scenario: High-reliability task lighting in factories and warehouses with fluctuating 230VAC supply and thermal constraints. IC Role / Device Role / Timing Role: Thermal-aware power controller implementing over-temperature LED current foldback and shutdown. Use Value: Maintains safe operation up to +150°C junction temperature - extends product lifetime in enclosed fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AC/DC digital LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NCL30160 | Analog-controlled buck-boost controller; no built-in dimmer detection or digital waveform analysis. | Requires external dimmer interface circuitry and optocoupler-based feedback for tight regulation. | Choose when cost sensitivity outweighs dimmer compatibility and design simplicity. |
| Infineon ICE2QRSD series | Quasi-resonant PWM controller with integrated 650V MOSFET; lacks native smart dimmer support and primary-side sensing accuracy. | Needs secondary-side feedback and external dimmer interface IC for full dimming functionality. | Prefer when higher integration (integrated HV switch) is prioritized over digital dimmer intelligence and ultra-low THD. |
Compared with NCL30160 and ICE2QRSD, the iW3688-01 uniquely combines digital dimmer detection, PrimAccurate™ sensing, and EZ-EMI® in a single SOIC-14 package - reducing total component count by ≥30% and enabling certified Class C compliance without design iteration.
Availability
iW3688-01 is available at Aetrix Electronics and suitable for dimmable LED retrofit lamps, commercial downlights, and smart home lighting systems requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for iW3688-01 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 IoT applications.
The iW3688-01 belongs to Renesas' digital LED driver controller product line, engineered specifically for single-stage, high-PF, dimmable AC/DC LED drivers targeting energy-efficient lighting replacement markets.
FAQ
What is the maximum output power supported by the iW3688-01?
The iW3688-01 is rated for up to 14W output power when operating from a 230VAC input. This rating reflects its optimized design for compact, thermally constrained LED retrofit lamps and luminaires - not peak transient capability. Derating may be required above 50°C ambient or in sealed enclosures. The iW3688-01 achieves this output with >85% typical efficiency and maintains ±5% LED current regulation across line and load variations.
Does the iW3688-01 require an optocoupler or secondary-side feedback circuit?
No, the iW3688-01 does not require an optocoupler or secondary-side feedback circuit. It uses Renesas' patented PrimAccurate™ primary-side sensing technology to achieve ±5% LED current regulation directly from the primary side. This eliminates isolation components, reduces BOM count, and simplifies PCB layout - a key advantage confirmed in the iW3688-01 datasheet and application notes.
Which dimmer types are compatible with the iW3688-01?
The iW3688-01 supports leading-edge (R-type and R-L type), trailing-edge (R-C type), and digital smart dimmers through its advanced cycle-by-cycle waveform analysis engine. Compatibility is verified per the iW3688-01 Product Summary Rev. 1.2 - no external dimmer identification circuitry is needed. The iW3688-01 dynamically adjusts input impedance to match each dimmer's electrical signature.
What package type and footprint does the iW3688-01 use?
The iW3688-01 is housed in a standard 14-lead SOIC-14 package (JEDEC MS12F), with dimensions 8.75mm × 4.00mm × 1.75mm. It is RoHS-compliant and Halide-free, rated MSL-1, and qualified for reflow soldering up to 260°C for 10 seconds. The iW3688-01 shares pinout and footprint with other variants in the iW3688 family, enabling design reuse across input voltage options.
How does the iW3688-01 meet IEC61000-3-2 harmonic current requirements?
The iW3688-01 meets IEC61000-3-2 Class C requirements by achieving power factor >0.92 and total harmonic distortion <20% at full load - enabled by its digital control algorithm, quasi-resonant switching, and EZ-EMI® integrated filtering. These performance values are measured and specified in the iW3688-01 Product Summary, eliminating need for external PFC stages or complex EMI filters.
IW3688-01 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Flyback, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- -
- Voltage - Supply (Max):
- -
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- General Purpose
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
IW3688-01 FAQ
1.How can I place an order for IW3688-01 through Aetrix?
Please submit a Request for Quotation (RFQ) for IW3688-01 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 IW3688-01 reliable?
The price and inventory of IW3688-01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW3688-01 is usually 5 days.
3.What payment methods are accepted for IW3688-01?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW3688-01 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW3688-01?
IW3688-01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW3688-01 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 IW3688-01?
For technical support, including IW3688-01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW3688-01 requirements.
6.How does Aetrix verify that IW3688-01 is sourced from the original manufacturer or authorized distributors?
All IW3688-01 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 IW3688-01 meets industry standards.
7.What is the process for return or replacement of IW3688-01?
All IW3688-01 units undergo pre-shipment inspection (PSI). If there is an issue with IW3688-01, 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 IW3688-01 part is unused and in its original packaging.
Return procedure for IW3688-01:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IW3688-01 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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