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Renesas IW380-32B
- Part No.:
- IW380-32B
- Manufacturer:
- Renesas
- Category:
- LED Drivers
- Package:
- 10-SOP (0.154", 3.90mm Width)
- Datasheet:
-
IW380-32B.pdf
- Description:
- HIGH-PERFORMANCE STEP-DOWN DC/DC
- Quantity:
- Payment:
- Shipping:
Inventory:2,323
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Product details
Overview
The iW380-32B from Renesas Electronics is a high-performance step-down DC/DC controller optimized for constant-power/constant-current (CP/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), configurable startup voltage, and integrated protections including OVP, OSP, OCP, OTP, and sense-resistor short detection.
For engineers reviewing the iW380-32B datasheet, iW380-32B pinout, iW380-32B application, or iW380-32B equivalent, this device is selected for CP/CC-mode LED drivers requiring precise low-level dimming linearity, noise-immune analog/PWM/resistor dimming flexibility, and thermal de-rating control in industrial and architectural lighting systems.
Technical Context
The iW380-32B operates exclusively in CP/CC mode with a fixed constant-power level of 80% of full-scale output power, enabling stable luminous flux under varying forward voltage conditions. Its digital control loop maintains tight CC regulation (< ±3%) and supports high-side buck topology with external high-side MOSFET gate drive via HSG pin and bootstrap supply on BOOT.
Dual dimming inputs (DIM1 and DIM2) are auto-sensing for resistor, analog voltage, or PWM signals, and internally multiplied to determine final LED current percentage. A dedicated light-off mode reduces quiescent current below 1mA while retaining dimming input monitoring capability for fast wake-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Input Voltage | 22V to 78V DC - supports wide-range industrial and commercial AC/DC front-end outputs |
| Dimming Range & Resolution | 0.0625%–100% with 0.0625% resolution - enables flicker-free ultra-low-level illumination in architectural lighting |
| Constant-Power Target | 80% of full-scale output power - ensures consistent lumen output across LED Vf drift and temperature variation |
| CC Regulation Accuracy | < ±3% line/load - guarantees stable LED current despite input ripple or load changes |
| Light-Off Current | < 1mA - minimizes standby power in off-state while preserving instant-on responsiveness |
| Thermal Protection | Over-temperature current de-rating - prevents thermal runaway without hard shutdown during sustained overload |
| Dimming Signal Support | Auto-detected 3-in-1 on both DIM1/DIM2 - eliminates external configuration logic for analog/PWM/resistor dimming interfaces |
Pinout & Package
Package: 10-Lead SOIC (Small Outline Integrated Circuit), surface-mount, RoHS-compliant, thermal resistance 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 protection thresholds |
| VCC | IC internal supply | Regulated 5V supply rail for internal circuitry; max 20mA continuous draw |
| DIM1 / DIM2 | Dual dimming inputs | Independent analog/PWM/resistor dimming ports; internally multiplied for final current scaling |
| GND | Ground reference | Common return for power, signal, and sensing paths; critical for accurate ISNS measurement |
| ISNS | Current sense input | Connects to shunt resistor for real-time inductor current feedback in CC/CP regulation loop |
| CFG | Configuration input | Analog voltage input setting startup threshold and dimming hysteresis behavior |
| LX | Switching node | Connection point between external high-side MOSFET source and buck inductor |
| HSG | High-side gate driver output | Drives external N-channel MOSFET gate; referenced to LX, not GND |
| BOOT | Bootstrap supply | Provides floating voltage for HSG driver; requires external bootstrap capacitor to LX |
Key Features
| Feature | Design Value |
|---|---|
| Dual-dimming multiplication (DIM1 × DIM2) | Enables multi-level dimming architecture without microcontroller coordination or external logic |
| Configurable startup voltage | Prevents turn-on flicker during brown-out or slow-rising input conditions in AC/DC systems |
| Light-off mode with sub-1mA quiescent current | Supports energy-efficient "zero-power" standby while maintaining dimming responsiveness |
| Auto-detect 3-in-1 dimming per port | Reduces BOM count and layout complexity by eliminating external dimming-type selection circuitry |
| Integrated OVP, OSP, OCP, OTP, and sense-short protection | Eliminates need for discrete protection ICs and simplifies system-level safety certification |
Applications
| Architectural LED Wall Washers | Industrial High-Bay Lighting |
|---|---|
Use Scenario: Precise low-level dimming required for museum-grade lighting with zero perceptible flicker at 0.1% brightness. IC Role / Device Role / Timing Role: CP/CC controller regulating LED string current while maintaining constant optical power across Vf shift due to temperature. Use Value: iW380-32B's 0.0625% dimming resolution and 80% CP target ensure uniform lumen output and eliminate banding artifacts in gradient lighting scenes. | Use Scenario: High-reliability LED fixtures operating continuously in hot factory environments with variable line voltage. IC Role / Device Role / Timing Role: Primary DC/DC controller managing constant-power delivery and thermal foldback during ambient temperature excursions. Use Value: iW380-32B's over-temperature current de-rating and < ±3% CC regulation maintain consistent light output without abrupt shutdown or color shift. |
| Commercial Tunable White Drivers | Outdoor LED Streetlight Sub-Drivers |
Use Scenario: Dual-channel tunable white systems where independent warm/cool LED strings require synchronized but distinct dimming curves. IC Role / Device Role / Timing Role: CP/CC controller implementing multiplicative dimming (DIM1 × DIM2) to generate non-linear, perceptually uniform intensity mapping. Use Value: iW380-32B's dual auto-sensing dimming ports allow seamless integration with 0–10V, PWM, or resistor-based wall controllers without firmware changes. | Use Scenario: Two-stage streetlight design using PFC front-end (e.g., iW3677) followed by isolated or non-isolated DC/DC stage. IC Role / Device Role / Timing Role: Secondary-stage CP/CC controller interfacing with PFC IC via analog feedback or digital interface (e.g., iW350). Use Value: iW380-32B's 78V input rating and robust protection suite enable reliable operation downstream of high-voltage PFC outputs in outdoor-rated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-power/constant-current LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP4651GQ-Z | Single-dimming-input, no CP mode; only CC/CV modes; max input 60V | Lacks multiplicative dimming, CP targeting, and 78V input support | Use only when CP functionality and >60V input are not required |
| LM3445MM/NOPB | Analog-only dimming; no auto-detect; no CP mode; max input 65V; no light-off mode | Requires external hysteresis and startup delay circuitry; higher BOM cost | Consider for cost-sensitive, low-complexity CC-only designs with stable input |
Compared with MP4651GQ-Z and LM3445MM/NOPB, the iW380-32B uniquely delivers 80% CP targeting, dual auto-sensing dimming, 78V operation, and sub-1mA light-off mode-making it optimal for high-fidelity, thermally adaptive, and multi-interface LED systems where dimming fidelity and reliability are prioritized over minimal BOM count.
Availability
iW380-32B is available at Aetrix Electronics and suitable for architectural lighting, industrial high-bay fixtures, and outdoor streetlight drivers requiring stable component supply, long-term lifecycle support, and compliance with IEC 62384 and ENERGY STAR SSL requirements.
Supply support for iW380-32B 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 applications.
The iW380 product line is designed specifically for high-performance, digitally controlled LED lighting drivers with emphasis on dimming precision, thermal resilience, and multi-standard dimming interface compatibility.
FAQ
What is the constant-power target setting for iW380-32B?
The iW380-32B is factory-configured for constant-power operation at 80% of full-scale output power. This fixed CP level ensures predictable lumen maintenance across LED forward voltage variations caused by temperature or aging, without requiring external programming or configuration pins. The iW380-32B maintains this CP target while simultaneously regulating LED current to meet the CP/CC specification under all operating conditions.
Does iW380-32B support both analog and PWM dimming on the same pin?
No - iW380-32B supports analog voltage, PWM duty cycle, or resistor-based dimming on each dimming port (DIM1 and DIM2), but auto-detection occurs per port independently. Each port identifies the active dimming type upon power-up or signal transition, and the two inputs are multiplicatively combined (DIM1% × DIM2%) to set final LED current. The iW380-32B does not accept mixed signal types on a single pin.
What protection features are integrated into iW380-32B?
iW380-32B integrates output overvoltage (OVP), output short-circuit (OSP), VIN over/under-voltage, overcurrent (OCP), sense-resistor short detection, and over-temperature (OTP) protection. All protections trigger either latch-off or auto-retry behavior depending on configuration. These functions are implemented in hardware and do not rely on external components, reducing system-level validation effort for safety-critical LED lighting applications using iW380-32B.
Can iW380-32B be used in a two-stage AC/DC LED driver with PFC front-end?
Yes - iW380-32B is explicitly validated for use in two-stage architectures with PFC front-ends such as the iW3677 flyback controller. Its 78V maximum input rating accommodates typical PFC output voltages (e.g., 40–75V DC), and its CP/CC regulation complements PFC-derived bus stability. Reference designs show direct interface with iW350 interface ICs for analog feedback translation, confirming interoperability in production-grade iW380-32B-based systems.
What is the purpose of the CFG pin on iW380-32B?
The CFG pin on iW380-32B sets configuration parameters including startup voltage threshold and dimming signal hysteresis via an external resistor divider. For iW380-32B, CFG determines the minimum input voltage required before enabling switching and adjusts noise immunity for analog dimming inputs. This pin enables application-specific tuning without firmware or additional ICs, directly influencing system reliability during brown-out events and noisy dimming environments in iW380-32B deployments.
IW380-32B 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
IW380-32B FAQ
1.How can I place an order for IW380-32B through Aetrix?
Please submit a Request for Quotation (RFQ) for IW380-32B 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 IW380-32B reliable?
The price and inventory of IW380-32B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW380-32B is usually 5 days.
3.What payment methods are accepted for IW380-32B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW380-32B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW380-32B?
IW380-32B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW380-32B 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 IW380-32B?
For technical support, including IW380-32B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW380-32B requirements.
6.How does Aetrix verify that IW380-32B is sourced from the original manufacturer or authorized distributors?
All IW380-32B 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 IW380-32B meets industry standards.
7.What is the process for return or replacement of IW380-32B?
All IW380-32B units undergo pre-shipment inspection (PSI). If there is an issue with IW380-32B, 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 IW380-32B part is unused and in its original packaging.
Return procedure for IW380-32B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IW380-32B 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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