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Renesas IW380-42B
- Part No.:
- IW380-42B
- Manufacturer:
- Renesas
- Category:
- LED Drivers
- Package:
- 10-SOP (0.154", 3.90mm Width)
- Datasheet:
-
IW380-42B.pdf
- Description:
- HIGH-PERFORMANCE STEP-DOWN DC/DC
- Quantity:
- Payment:
- Shipping:
Inventory:2,996
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Product details
Overview
The IW380-42B from Renesas Electronics is a high-performance step-down DC/DC controller designed for LED lighting drivers operating up to 78V input, delivering true DC dimming from 0.0625% to 100% with 0.0625% resolution, and supporting CC/CV/CP operating modes in a 10-lead SOIC package.
For engineers reviewing the IW380-42B datasheet, IW380-42B pinout, IW380-42B application, or IW380-42B equivalent, this controller enables precise current regulation in two-stage AC/DC LED drivers, supports dual-dimming signal processing (analog/PWM/resistor), and integrates configurable startup voltage and light-off mode for flicker-free operation.
Technical Context
The IW380-42B implements digital control architecture for high-resolution dimming with multiplicative dimming logic (DIM1% × DIM2%), enabling fine-grained current scaling across wide dynamic range. It operates in high-side buck topology with internal high-side gate driver (HSG) and bootstrap (BOOT) circuitry for MOSFET control.
It supports three configurable operating modes-CC-only, CV/CC, and CP/CC-with mode selection determined by external configuration (CFG pin) and variant-specific factory programming. The device features auto-detection of dimming signal types on both DIM1 and DIM2 inputs, plus programmable hysteresis and startup voltage thresholds to suppress noise-induced flicker.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 22V to 78V DC - supports wide-range industrial and commercial LED driver inputs without external pre-regulation. |
| Dimming Resolution | 0.0625% - enables ultra-fine brightness control down to near-zero current, critical for architectural and hospitality lighting. |
| Max Output Power | 150W - suitable for high-lumen LED modules and linear light strips requiring robust thermal management. |
| Operating Modes | CC, CV/CC, CP/CC - selectable via CFG pin and factory variant coding; IW380-42B is CP/CC variant with 80% constant power setpoint. |
| Light-Off Current | <1mA - minimizes standby power in off-state while maintaining dimming input monitoring for instant wake-up. |
| Thermal Protection | Over-temperature current de-rating - dynamically reduces LED current above threshold to prevent thermal runaway without shutdown. |
| Dimming Signal Support | 3-in-1 per port (resistor, analog voltage, PWM) - eliminates need for external signal conditioning circuitry in multi-source dimming systems. |
Pinout & Package
Package: 10-lead SOIC (Small Outline Integrated Circuit), surface-mount, RoHS-compliant, θJA = 209°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input & Sensing | Accepts 22–78V DC input; also used for input voltage monitoring and over/under-voltage protection. |
| VCC | IC Supply Rail | Internal LDO output or external 5V supply; powers internal logic and gate driver circuits (max 20mA). |
| DIM1 / DIM2 | Dual Dimming Inputs | Independent analog/PWM/resistor dimming ports; internally multiplied to determine final LED current percentage. |
| GND | Ground Reference | Common return path for analog sensing, digital logic, and power stages; requires low-impedance PCB layout. |
| ISNS | Current Sense Input | Connects to low-side sense resistor; enables tight ±3% CC line/load regulation and OCP detection. |
| CFG | Mode Configuration | Analog voltage input that selects operating mode (CC/CV/CP); factory-set for IW380-42B as CP/CC with 80% CP setpoint. |
| LX | Switching Node | Connection to buck inductor and high-side MOSFET source; carries high dv/dt switching waveform. |
| HSG | High-Side Gate Driver | Drives gate of external N-channel MOSFET; rail-to-rail output referenced to LX node. |
| BOOT | Bootstrap Supply | Provides floating supply for HSG driver; requires external bootstrap capacitor between BOOT and LX. |
Key Features
| Feature | Design Value |
|---|---|
| True DC Dimming | 0.0625%–100% range with guaranteed linearity - eliminates PWM-induced EMI and audible noise in sensitive environments. |
| Dual-Dimming Architecture | DIM1 × DIM2 multiplication - enables flexible system-level dimming (e.g., master + scene control) without microcontroller intervention. |
| Configurable Startup Voltage | Adjustable threshold prevents turn-on flicker during brown-out or slow-ramp AC/DC startup conditions. |
| Rich Protection Suite | OVP, OSP, OCP, OTP, VVIN UV/OV, sense-resistor short detection - ensures robust field reliability in unattended LED installations. |
| Light-Off Mode | <1mA quiescent current with active dimming monitoring - enables zero-flicker wake-up within microseconds upon dimmer activation. |
Applications
| Architectural Linear Lighting | Commercial Recessed Downlights |
|---|---|
Use Scenario: Long LED strips in ceiling coves or wall washers requiring smooth, silent dimming across 0.1–100% range. IC Role / Device Role / Timing Role: Primary CC/CV/CP controller managing buck stage after PFC front-end; handles dimming interface and thermal foldback. Use Value: 0.0625% dimming resolution eliminates visible steps at low light levels; CP/CC mode maintains consistent lumen output despite LED forward voltage drift. | Use Scenario: High-bay fixtures in retail or office spaces using multi-channel dimming (e.g., daylight harvesting + occupancy control). IC Role / Device Role / Timing Role: Dual-dimming port controller accepting analog 0–10V and PWM signals simultaneously for layered control schemes. Use Value: Auto-detectable 3-in-1 dimming eliminates external signal translators; DIM1×DIM2 multiplication enables independent zone and global dimming. |
| Industrial LED Task Lighting | Outdoor Area Lighting Drivers |
Use Scenario: Precision machine vision or inspection lighting where stable current and zero flicker are mandatory. IC Role / Device Role / Timing Role: Constant-current regulator with <±3% line/load regulation and fast transient response to maintain optical consistency. Use Value: Tight CC regulation ensures repeatable lumen output across input voltage variation; light-off mode enables instant-on capability after motion-triggered wake-up. | Use Scenario: Streetlight or parking lot luminaires exposed to wide ambient temperature swings and unstable grid voltage. IC Role / Device Role / Timing Role: Robust buck controller with over-temperature current de-rating and 78V max input tolerance for direct connection to rectified AC lines. Use Value: OTP de-rating (enabled in IW380-42B) avoids thermal shutdown during sustained high-temperature operation; 150W capability supports high-lumen arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409HV | Fixed-frequency current-mode controller; no integrated dimming multiplication or CP/CC mode; max 75V VIN. | Requires external dimming logic for multi-input schemes; limited to CC-only operation. | Choose when cost-sensitive, single-dimming-source designs dominate and advanced dimming features are unnecessary. |
| UCC28810 | Analog-dimming only; no PWM or resistor dimming support; no light-off mode; lower max VIN (65V). | Suitable for basic analog-dimmable drivers but lacks noise-immunity features and multi-signal flexibility. | Prefer for legacy analog-dimming infrastructure where firmware-free simplicity outweighs resolution and flexibility needs. |
Compared with LM3409HV and UCC28810, the IW380-42B delivers unique multiplicative dimming, 80% CP/CC operation, and sub-0.1% dimming resolution-enabling flicker-free, thermally adaptive LED drivers for premium architectural and industrial lighting where dimming fidelity and system integration matter.
Availability
IW380-42B is available at Aetrix Electronics and suitable for architectural linear lighting, commercial downlights, and industrial task lighting requiring stable component supply, long-term lifecycle support, and compliance with IEC 62384 and ENERGY STAR SSL requirements.
Supply support for IW380-42B 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications, with deep expertise in power management and LED lighting control.
The IW380 family is engineered specifically for high-performance, digitally enhanced LED buck controllers-targeting applications demanding ultra-fine dimming, multi-signal compatibility, and thermal resilience in compact form factors.
FAQ
What operating mode is implemented in the IW380-42B?
The IW380-42B is factory-configured as a constant-power/constant-current (CP/CC) variant with an 80% constant power setpoint. This mode maintains stable power delivery to the LED load across forward voltage variations while retaining tight current regulation below the CP threshold. The mode is fixed and cannot be altered in-circuit; it is defined during manufacturing per Renesas' ordering information table.
Does the IW380-42B support PWM dimming on both DIM1 and DIM2 pins?
Yes, the IW380-42B supports PWM dimming on both DIM1 and DIM2 pins as part of its 3-in-1 dimming capability (PWM, analog voltage, or resistor). Each pin independently detects and processes PWM signals, and the final LED current is calculated as the product of the two dimming percentages-enabling cascaded or layered PWM control without external logic.
What is the function of the CFG pin on the IW380-42B?
The CFG pin on the IW380-42B sets the controller's operating mode via an analog voltage level. For the IW380-42B, this pin is internally configured to select CP/CC mode with 80% constant power. While the pin remains accessible, its voltage level does not alter the mode-it reflects the factory-programmed variant identity and must be terminated per datasheet guidelines to ensure stable operation.
How does the light-off mode work in the IW380-42B?
The light-off mode in the IW380-42B activates when dimming inputs fall below a configurable threshold, reducing quiescent current to under 1mA while continuously monitoring DIM1 and DIM2. Upon detecting a valid rise above the light-on threshold, the IW380-42B resumes full regulation within microseconds-eliminating perceptible delay or flash during wake-up, critical for occupancy-sensing lighting systems.
Is the IW380-42B pin-compatible with other variants in the iW380 family?
Yes, all iW380 variants-including IW380-42B-are housed in the same 10-lead SOIC package with identical pinout and electrical interface. This allows drop-in replacement across CC-only, CV/CC, and CP/CC variants, provided external configuration (e.g., RSET, feedback network, and DIM wiring) aligns with the selected mode's requirements.
IW380-42B 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:
- 21.56V ~ 63.7V
- 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
IW380-42B FAQ
1.How can I place an order for IW380-42B through Aetrix?
Please submit a Request for Quotation (RFQ) for IW380-42B 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 IW380-42B reliable?
The price and inventory of IW380-42B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW380-42B is usually 5 days.
3.What payment methods are accepted for IW380-42B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW380-42B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW380-42B?
IW380-42B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW380-42B 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 IW380-42B?
For technical support, including IW380-42B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW380-42B requirements.
6.How does Aetrix verify that IW380-42B is sourced from the original manufacturer or authorized distributors?
All IW380-42B 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 IW380-42B meets industry standards.
7.What is the process for return or replacement of IW380-42B?
All IW380-42B units undergo pre-shipment inspection (PSI). If there is an issue with IW380-42B, 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 IW380-42B part is unused and in its original packaging.
Return procedure for IW380-42B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IW380-42B 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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