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Renesas IW380-20B
- Part No.:
- IW380-20B
- Manufacturer:
- Renesas
- Category:
- LED Drivers
- Package:
- 10-SOP (0.154", 3.90mm Width)
- Datasheet:
-
IW380-20B.pdf
- Description:
- HIGH-PERFORMANCE STEP-DOWN DC/DC
- Quantity:
- Payment:
- Shipping:
Inventory:2,237
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Product details
Overview
The IW380-20B from Renesas Electronics is a high-performance step-down DC/DC controller optimized for constant-voltage/constant-current (CV/CC) LED lighting drivers, supporting input voltages up to 78V and offering True DC dimming from 0.0625% to 100% with 0.0625% resolution. It implements dual-dimming signal processing (DIM1 × DIM2), features light-off mode with <1mA quiescent current, and integrates overvoltage, overcurrent, and overtemperature protections.
For engineers reviewing the IW380-20B datasheet, IW380-20B pinout, IW380-20B application, or IW380-20B equivalent, key selection considerations include its CV/CC operating mode, DIM2-as-feedback configuration, SOIC-10 package, 10-pin high-side buck control architecture, and compatibility with two-stage AC/DC LED driver topologies requiring precise analog/PWM/resistor dimming interoperability.
Technical Context
The IW380-20B operates in CV/CC mode where DIM2 serves as the feedback input for voltage regulation, enabling seamless transition between constant-current and constant-voltage output behavior. Its digital control loop maintains CC line/load regulation < ±3% and CV line/load regulation < ±3%, with configurable startup voltage to suppress power-off flicker.
It supports 3-in-1 dimming auto-detection on both DIM1 and DIM2-accepting analog voltage, PWM duty cycle, or RSET resistor inputs-and internally computes output current as the product of normalized DIM1% and DIM2% values. The light-off threshold triggers ultra-low-power monitoring below defined dimming levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 22V to 78V DC - supports wide-range industrial and commercial LED driver inputs including rectified 60Hz/50Hz mains-derived rails. |
| Operating Mode | CV/CC variant with DIM2 as feedback - enables automatic switchover between voltage- and current-regulated output based on load conditions. |
| True DC Dimming Range | 0.0625% to 100% - delivers full-spectrum linear dimming down to near-zero light output without PWM artifacts. |
| Dimming Resolution | 0.0625% - provides 16-bit-equivalent granularity for smooth, high-fidelity dimming control in architectural and stage lighting. |
| Light-Off Current | <1mA - minimizes standby power in off-state while retaining fast wake-up response to rising dimming signals. |
| Protection Features | OVP, OSP, VVIN UV/OV, OCP, sense-resistor short, OTP - ensures robust operation in unregulated or fault-prone LED driver environments. |
| Thermal Resistance | θJA = 209°C/W - defines thermal derating behavior in SOIC-10 PCB layouts without forced airflow or heatsinking. |
Pinout & Package
The IW380-20B is housed in a 10-lead SOIC package with exposed pad for thermal enhancement. Pin functions are validated per Renesas Product Summary Rev. 1.0 (26-Jun-2024).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input & Sensing | Accepts 22–78V DC input and monitors input rail for UV/OV protection and regulation stability. |
| VCC | IC Power Supply | Provides internal bias; requires local 4.7μF decoupling; max 20mA continuous draw. |
| DIM1 | Analog Dimming Input | Programs primary dimming level via analog voltage, PWM, or resistor; enables multi-level current setting. |
| DIM2 | Feedback Dimming Input | In IW380-20B, configured as CV feedback node - replaces traditional VFB in CV/CC mode. |
| GND | Ground Reference | Common return for power, analog, and sensing paths; must be low-impedance for stable current regulation. |
| ISNS | Current Sense Input | Connects to shunt resistor for high-side inductor current measurement; enables tight CC regulation. |
| CFG | Configuration Input | Resistor-programmable pin sets startup voltage threshold and dimming hysteresis. |
| LX | Switch Node | Drives external high-side MOSFET source; swings between VIN and ground during switching. |
| HSG | High-Side Gate Driver | Outputs gate drive signal referenced to LX; drives N-channel MOSFET with bootstrap-assisted level shift. |
| BOOT | Bootstrap Supply | Charges external bootstrap capacitor to sustain HSG drive during high-side conduction phase. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-dimming signal multiplication (DIM1 × DIM2) | Enables compound dimming control - e.g., master scene level × local zone adjustment - without external logic. |
| Configurable startup voltage | Prevents output turn-on flicker at marginal input voltages by delaying regulation until VIN exceeds user-set threshold. |
| Auto-detect 3-in-1 dimming | Eliminates external mode-select circuitry by identifying analog, PWM, or resistor dimming on either DIM pin at power-up. |
| Light-off mode with wake-up capability | Reduces system standby power while maintaining sub-100μs response to dimming signal rise above light-on threshold. |
| Overtemperature current de-rating | Gradually reduces LED current above safe junction temperature instead of abrupt shutdown - preserves light continuity in thermally constrained enclosures. |
Applications
| Two-Stage AC/DC LED Drivers | Architectural Tunable White Lighting |
|---|---|
Use Scenario: Integrated front-end PFC (e.g., iW3677) followed by IW380-20B buck stage driving high-CRI LED arrays. IC Role / Device Role / Timing Role: Secondary-stage CV/CC controller regulating output voltage/current while interpreting dimming commands from interface IC (e.g., iW350). Use Value: Enables stable 0.0625%–100% dimming across full input line range with no audible noise or visible flicker. | Use Scenario: Dual-channel tunable white fixture using warm-white and cool-white LEDs driven independently by separate IW380-20B channels. IC Role / Device Role / Timing Role: Independent CV/CC channel controller accepting analog dimming inputs for CCT adjustment and intensity scaling. Use Value: Delivers precise correlated color temperature tuning with simultaneous lumen maintenance via synchronized DIM1×DIM2 scaling. |
| Commercial LED Strip Controllers | Industrial High-Bay Lighting |
Use Scenario: Long-run LED strip installations powered from 48V or 56V DC distribution rails with centralized analog/PWM dimming. IC Role / Device Role / Timing Role: Buck controller managing constant-current delivery while rejecting noise on long dimming cables via configurable hysteresis. Use Value: Maintains stable current despite EMI-coupled dimming signal jitter, eliminating banding or strobing on flexible strips. | Use Scenario: High-lumen-output high-bay fixtures operating from 72V DC battery or PoE++-derived supply in warehouse environments. IC Role / Device Role / Timing Role: Primary regulation IC handling up to 150W output with integrated OVP/OSP/OTP for unattended operation. Use Value: Ensures fail-safe shutdown under short-circuit or overtemperature events without external protection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3410XMY/NOPB | Single-mode CC-only operation; no CV/CC switchover; max 40V input; no dual-dimming multiplication. | Limited to fixed-output-current LED strings; unsuitable for tunable-white or adaptive-voltage loads. | Select IW380-20B when CV/CC flexibility, >40V input, or compound dimming is required. |
| MPQ4425AGU-AEC1-P | Automotive-grade synchronous buck; supports only analog dimming; no built-in OVP/OSP; 36V max input. | Designed for automotive interior lighting; lacks light-off mode, dimming hysteresis, and multi-signal auto-detection. | Choose IW380-20B for commercial/industrial LED drivers needing full protection suite and advanced dimming interoperability. |
Compared with LM3410XMY/NOPB and MPQ4425AGU-AEC1-P, the IW380-20B uniquely combines CV/CC mode, DIM2-as-feedback, 78V input tolerance, and 0.0625% True DC dimming - making it suitable for high-reliability, multi-standard LED systems where dimming fidelity and topology adaptability are critical.
Availability
IW380-20B is available at Aetrix Electronics and suitable for two-stage AC/DC LED lighting drivers, architectural tunable white systems, and industrial high-bay lighting requiring stable component supply, long-term lifecycle support, and consistent dimming performance across production batches.
Supply support for IW380-20B 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 manufacturer delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications.
The IW380 series belongs to Renesas' intelligent LED driver IC portfolio, engineered specifically for high-fidelity, high-efficiency LED lighting systems demanding precision dimming, multi-topology support, and robust protection in commercial and industrial environments.
FAQ
What is the operating mode configuration of the IW380-20B?
The IW380-20B is factory-configured as a constant-voltage/constant-current (CV/CC) variant, with DIM2 repurposed as the feedback input for voltage regulation. This allows automatic transition between CC and CV output behavior depending on load impedance, unlike CC-only variants such as IW380-00B. The IW380-20B maintains this mode without external configuration pins or firmware.
Does the IW380-20B support True DC dimming below 1%?
Yes, the IW380-20B supports True DC dimming from 0.0625% to 100% with 0.0625% resolution - verified in Renesas Product Summary Rev. 1.0. This enables flicker-free, artifact-free dimming at extremely low light levels, critical for hospitality, museum, and residential applications where sub-1% dimming is required.
How does the IW380-20B handle dimming signal noise or jitter?
The IW380-20B includes configurable dimming signal hysteresis via the CFG pin, allowing designers to trade dimming resolution for improved noise immunity. When analog dimming voltage or PWM duty cycle exhibits jitter, the device stabilizes output current by filtering input transients - ensuring consistent LED brightness without oscillation or stepping artifacts.
What protections are integrated into the IW380-20B?
The IW380-20B integrates output overvoltage (OVP), output short-circuit (OSP), VVIN over/under voltage, overcurrent (OCP), sense-resistor short detection, and overtemperature (OTP) protection. All protections trigger either latch-off or auto-retry behavior per configuration, eliminating need for external protection circuitry in most LED driver designs.
Is the IW380-20B pin-compatible with other IW380 variants?
No - while all IW380 variants share the same 10-lead SOIC package and pinout, functional differences (e.g., DIM2 used as feedback in IW380-20B versus dimming input in IW380-00B) require schematic and layout review before substitution. The IW380-20B must be used with CV/CC-specific reference designs; direct replacement without validation may result in regulation failure.
IW380-20B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-SOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 22V
- Voltage - Supply (Max):
- 65V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- Analog, PWM
- Applications:
- LED Lighting
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-SOIC
IW380-20B FAQ
1.How can I place an order for IW380-20B through Aetrix?
Please submit a Request for Quotation (RFQ) for IW380-20B 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 IW380-20B reliable?
The price and inventory of IW380-20B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW380-20B is usually 5 days.
3.What payment methods are accepted for IW380-20B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW380-20B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW380-20B?
IW380-20B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW380-20B 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 IW380-20B?
For technical support, including IW380-20B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW380-20B requirements.
6.How does Aetrix verify that IW380-20B is sourced from the original manufacturer or authorized distributors?
All IW380-20B 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 IW380-20B meets industry standards.
7.What is the process for return or replacement of IW380-20B?
All IW380-20B units undergo pre-shipment inspection (PSI). If there is an issue with IW380-20B, 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 IW380-20B part is unused and in its original packaging.
Return procedure for IW380-20B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IW380-20B Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
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BCR420UW6-7
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BCR421UW6-7
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
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