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Renesas IW380-30B
- Part No.:
- IW380-30B
- Manufacturer:
- Renesas
- Category:
- LED Drivers
- Package:
- 10-SOP (0.154", 3.90mm Width)
- Datasheet:
-
IW380-30B.pdf
- Description:
- HIGH-PERFORMANCE STEP-DOWN DC/DC
- Quantity:
- Payment:
- Shipping:
Inventory:1,574
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Product details
Overview
The IW380-30B from Renesas Electronics is a high-performance step-down DC/DC controller designed for LED lighting applications requiring precise constant-current regulation and ultra-fine dimming control. It supports input voltages up to 78V, delivers true DC dimming from 0.0625% to 100% with 0.0625% resolution, and operates in CP/CC mode with 70% constant-power setpoint - enabling stable, flicker-free dimming in architectural and commercial LED drivers.
For engineers reviewing the IW380-30B datasheet, IW380-30B pinout, IW380-30B application, or IW380-30B equivalent, this controller offers verified dual-dimming port auto-detection (analog/PWM/resistor), configurable startup voltage to suppress power-off flash, light-off mode with <1mA quiescent current, and integrated protections including OVP, OSP, OCP, OTP, and sense-resistor short detection.
Technical Context
The IW380-30B implements a digital-controlled high-side buck architecture optimized for LED current regulation, supporting up to 98% VOUT/VIN ratio and 150W output power. Its dual-dimming architecture computes final current as DIM1% × DIM2%, enabling multi-level dimming without external logic.
It features configurable dimming signal hysteresis for noise immunity, programmable minimum startup voltage to prevent flicker during brown-out, and over-temperature current de-rating - all implemented via analog configuration pins (CFG, DIM1, DIM2) without firmware or external microcontroller dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 22V to 78V DC - supports wide-range industrial and commercial AC/DC front-end outputs. |
| Dimming Resolution | 0.0625% - enables imperceptible low-level dimming down to candlelight-equivalent intensity. |
| Dimming Range | 0.0625% to 100% - guaranteed linearity across full scale for smooth human-perceived brightness transitions. |
| Operating Mode | CP/CC with 70% constant-power setpoint - maintains consistent lumen output across varying forward voltage LEDs. |
| Light-Off Current | <1mA - minimizes standby power while retaining dimming signal monitoring capability. |
| Protection Features | OVP, OSP, OCP, OTP, VVIN UV/OV, sense-resistor short protection - eliminates need for discrete protection circuitry. |
| Thermal Resistance | θJA = 209°C/W - defines PCB thermal design requirement for SOIC-10 package at rated power. |
Pinout & Package
Package: 10-Lead SOIC (Small Outline Integrated Circuit), surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input & Sensing | Accepts 22–78V DC input; also used for input voltage monitoring and UV/OV protection. |
| VCC | IC Power Supply | Internal LDO input; requires local 4.7µF bypass capacitor for stable 5V operation. |
| DIM1 / DIM2 | Dual Dimming Inputs | Support simultaneous analog voltage, PWM duty, or resistor-based dimming; auto-detected per port. |
| GND | Ground Reference | Analog and power ground common point; must be low-impedance connection to minimize noise coupling. |
| ISNS | Current Sense Input | Connects to low-side sense resistor; enables accurate LED current regulation with ±3% CC line/load regulation. |
| CFG | Configuration Input | Analog voltage-selectable pin defining startup threshold, dimming hysteresis, and protection behavior. |
| LX | Switching Node | Connects to source of external high-side MOSFET; critical for bootstrap timing and gate drive integrity. |
| HSG | High-Side Gate Driver | Drives external N-channel MOSFET gate; supports fast switching with minimized shoot-through risk. |
| BOOT | Bootstrap Supply | Provides floating supply for HSG driver; requires 0.1µF ceramic capacitor between BOOT and LX. |
Key Features
| Feature | Design Value |
|---|---|
| True DC Dimming Architecture | Digitally controlled current regulation with 0.0625% resolution ensures no PWM-induced EMI or audible noise. |
| Dual-Dimming Signal Processing | DIM1 × DIM2 multiplication enables flexible multi-source dimming (e.g., master + zone control) without external logic. |
| Configurable Startup Voltage | Adjustable via CFG pin to suppress turn-on flash in systems with slow-rising input rails or capacitive hold-up. |
| Light-Off Mode | Sub-1mA quiescent state with active dimming monitoring allows instant wake-up-no reset delay on dimmer reactivation. |
| Integrated Protection Suite | Hardware-based OVP, OSP, OCP, OTP, and sense-resistor short detection reduce BOM count and improve system reliability. |
Applications
| Architectural LED Downlights | Commercial LED Track Lighting |
|---|---|
Use Scenario: High-CRI, tunable-white luminaires in office and retail spaces requiring smooth 0.1%–100% dimming without flicker or color shift. IC Role / Device Role / Timing Role: Primary constant-current controller in two-stage AC/DC architecture, regulating LED string current with CP/CC mode to maintain lumen consistency across varying LED VF. Use Value: IW380-30B's 70% CP setpoint and 0.0625% dimming resolution eliminate visible stepping and enable seamless integration with DALI-2 or 0–10V control systems. | Use Scenario: Modular track lighting systems with multiple independently dimmable heads powered from a shared 48V DC bus. IC Role / Device Role / Timing Role: Buck controller managing individual LED load current per head, using DIM1 for master 0–10V signal and DIM2 for local PWM override. Use Value: Dual-dimming auto-detection and DIM1×DIM2 multiplication allow plug-and-play compatibility with both analog and digital control interfaces without board redesign. |
| Industrial LED High-Bay Fixtures | Outdoor LED Streetlight Drivers |
Use Scenario: High-power (100–150W) LED fixtures operating in wide ambient temperature ranges (-40°C to +85°C). IC Role / Device Role / Timing Role: Core current regulator implementing over-temperature current de-rating and robust OVP/OSP protection in harsh environments. Use Value: IW380-30B's 150W capability, -40°C to +150°C junction rating, and hardware-based OTP de-rating ensure long-term reliability without thermal derating penalties. | Use Scenario: Smart streetlights with adaptive dimming profiles based on time-of-day and motion sensing. IC Role / Device Role / Timing Role: Secondary-stage DC/DC controller accepting variable input from solar-charged battery or PoE-powered front-end, delivering stable LED current under dynamic input conditions. Use Value: Configurable startup voltage and light-off mode prevent flash during intermittent power loss, while 22–78V input range accommodates wide battery voltage swings. |
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; 0.5% min dimming, no digital dimming multiplication or CP/CC mode. | Requires external PWM-to-analog conversion for deep dimming; lacks auto-detect 3-in-1 dimming ports. | Preferred where cost sensitivity outweighs dimming resolution and multi-signal flexibility. |
| UCC28810 | Analog peak-current-mode controller; supports CV/CC only; dimming via analog voltage only, no PWM or resistor support. | No light-off mode; higher quiescent current (~2.5mA); no configurable startup voltage or dimming hysteresis. | Suitable for basic CV/CC LED drivers where advanced dimming features are not required. |
Compared with LM3409HV and UCC28810, the IW380-30B provides uniquely fine 0.0625% dimming resolution, hardware-based DIM1×DIM2 dimming synthesis, and integrated CP/CC operation - reducing system complexity and enabling next-generation human-centric lighting designs without added ICs or firmware.
Availability
IW380-30B is available at Aetrix Electronics and suitable for architectural LED downlights, commercial track lighting, and industrial high-bay fixtures requiring stable component supply, long-lifecycle assurance, and compliance with IEC 62384 and ENERGY STAR SSL requirements.
Supply support for IW380-30B 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 core expertise in analog, power, and timing technologies.
The IW380-30B belongs to Renesas' Intelligent LED Driver family, engineered specifically for high-fidelity, high-efficiency LED lighting systems demanding precision current regulation, ultra-deep dimming, and robust protection in compact form factors.
FAQ
What is the primary function of the IW380-30B in an LED lighting system?
The IW380-30B serves as a high-performance step-down DC/DC controller that regulates LED string current with exceptional accuracy and dimming fidelity. In CP/CC mode with 70% constant-power setpoint, it maintains consistent lumen output across varying LED forward voltages while delivering true DC dimming from 0.0625% to 100%. The IW380-30B replaces traditional analog controllers by integrating digital dimming processing, dual-dimming auto-detection, and comprehensive hardware protection - all within a 10-lead SOIC package.
How does the IW380-30B achieve its 0.0625% dimming resolution?
The IW380-30B achieves 0.0625% dimming resolution through an internal digital control loop that directly modulates the LED current reference with sub-microamp precision. Unlike PWM-based dimming, this true DC method avoids frequency-related EMI and audible noise. The resolution is maintained across the full 0.0625%–100% range with guaranteed linearity, enabled by factory-trimmed DACs and closed-loop current sensing via the ISNS pin. This performance is intrinsic to the IW380-30B silicon design and requires no external calibration.
Can the IW380-30B operate in constant-voltage mode?
No, the IW380-30B is configured exclusively for CP/CC (constant-power/constant-current) operation with a fixed 70% constant-power setpoint. It does not support CV-only or CV/CC modes. For CV/CC functionality, Renesas offers the IW380-20B variant. The IW380-30B's CP/CC architecture ensures stable optical output when driving LEDs with varying forward voltage - such as in multi-bin or aging strings - making it ideal for high-end architectural lighting where lumen consistency is critical.
What protections are built into the IW380-30B?
The IW380-30B integrates six hardware-based protections: output overvoltage (OVP), output short-circuit (OSP), VIN over/under-voltage, overcurrent (OCP), sense-resistor short detection, and overtemperature (OTP). All are implemented with dedicated comparators and independent fault latching - no software or external components required. Upon fault detection, the IW380-30B disables the HSG output and enters a safe shutdown state. Recovery is automatic after fault clearance, with configurable restart delay via the CFG pin. These protections are validated across the full -40°C to +150°C junction temperature range.
Is the IW380-30B pin-compatible with other variants in the iW380 family?
Yes, the IW380-30B shares identical 10-lead SOIC packaging and pinout with all iW380 variants, including IW380-00B, IW380-20B, and IW380-31B. Pin functions (VIN, VCC, DIM1, DIM2, GND, ISNS, CFG, LX, HSG, BOOT) remain fully consistent across the family. However, functional differences - such as CP/CC vs. CV/CC mode, dimming startup thresholds, and OTP de-rating behavior - are determined by internal mask options and cannot be altered post-manufacture. Board reuse is supported, but firmware or external configuration may require adjustment depending on variant-specific behavior.
IW380-30B 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
IW380-30B FAQ
1.How can I place an order for IW380-30B through Aetrix?
Please submit a Request for Quotation (RFQ) for IW380-30B 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 IW380-30B reliable?
The price and inventory of IW380-30B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW380-30B is usually 5 days.
3.What payment methods are accepted for IW380-30B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW380-30B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW380-30B?
IW380-30B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW380-30B 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 IW380-30B?
For technical support, including IW380-30B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW380-30B requirements.
6.How does Aetrix verify that IW380-30B is sourced from the original manufacturer or authorized distributors?
All IW380-30B 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 IW380-30B meets industry standards.
7.What is the process for return or replacement of IW380-30B?
All IW380-30B units undergo pre-shipment inspection (PSI). If there is an issue with IW380-30B, 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 IW380-30B part is unused and in its original packaging.
Return procedure for IW380-30B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IW380-30B Tags
-
BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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