Renesas IW3636-03

Overview

The IW3636-03 from Renesas Electronics is a single-stage AC/DC LED driver IC with integrated power factor correction (PFC), designed for PWM-dimmable lighting systems. It delivers ±3% output current regulation via primary-side sensing, supports 1–100% dimming range, and accepts analog input (0–1.8 V) on the NTC/DIM2 pin for maximum current configuration-enabling intelligent wireless or 0–10 V dimming in compact LED ballasts.

For engineers reviewing the IW3636-03 datasheet, IW3636-03 pinout, IW3636-03 application, or IW3636-03 equivalent, this device is selected for high-efficiency, low-noise, single-stage LED drivers requiring configurable analog dimming interface, SOIC-8 footprint, and <20% THD across wide load ranges.

Technical Context

The IW3636-03 operates in constant on-time quasi-resonant mode with adaptive frequency control (72 kHz or 90 kHz), enabling audible-noise suppression and fast active start-up. Its PrimAccurate™ primary-side sensing eliminates secondary feedback components and external loop compensation while maintaining stability over line (universal AC input), load, and temperature variations.

It integrates dual dimming interfaces: DIM1 accepts standard PWM signals, while NTC/DIM2 supports analog voltage (0–1.8 V) for output current scaling-distinct from PWM or NTC modes used in -01/-02 variants. Built-in protections include output open/short, over-voltage, under-voltage, and over-temperature (via external NTC or internal thermal shutdown).

Key Specifications

Pinout & Package

Package: SOIC-8 (surface-mount, 150°C max junction temperature, θJA = 170°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED driver applications.

Compared with NCL30160 and AL1676, the IW3636-03 uniquely combines analog dimming on a multifunction pin, programmable dimming curves, and integrated thermal derating-all within an SOIC-8 package-making it optimal for compact, feature-rich LED drivers requiring design flexibility and regulatory compliance.

Availability

IW3636-03 is available at Aetrix Electronics and suitable for smart lighting controls, commercial 0–10 V ballasts, and thermally managed outdoor LED fixtures requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IW3636-03 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 markets-with emphasis on energy efficiency and system integration.

The IW3636-03 belongs to Renesas' Intelligent Lighting Power (ILP) product line, engineered specifically for single-stage, high-PF, digitally controllable LED drivers targeting UL Class P, ENERGY STAR, and DLC-certified luminaires.

FAQ

What dimming interface does the IW3636-03 support?

The IW3636-03 supports analog dimming via 0–1.8 V input on the NTC/DIM2 pin to configure maximum LED current. It also accepts standard PWM signals on the DIM1 pin. Unlike IW3636-01 (PWM-only DIM2) or IW3636-02 (NTC-only DIM2), the -03 variant is specifically configured for analog voltage scaling-enabling seamless integration with DAC outputs or 0–10 V control systems.

Does the IW3636-03 require secondary-side feedback components?

No, the IW3636-03 uses Renesas' PrimAccurate™ primary-side sensing technology to achieve ±3% output current regulation without optocouplers, TL431, or secondary feedback circuitry. This eliminates isolation barriers and external compensation networks, reducing BOM cost and PCB area while maintaining stability across line, load, and temperature variations in the IW3636-03 design.

What is the purpose of the VIN pin on the IW3636-03?

The VIN pin (Pin 7) on the IW3636-03 serves two functions: it senses AC line voltage for PFC control and drives active start-up devices such as depletion-mode FETs. This dual role enables fast, efficient start-up without auxiliary windings or dedicated start-up resistors-directly contributing to the IW3636-03's low standby power and rapid turn-on performance.

Can the IW3636-03 be used in both isolated and non-isolated topologies?

Yes, the IW3636-03 supports both isolated and non-isolated flyback and buck-boost topologies. Its primary-side regulation architecture and flexible pin configuration-including ISENSE for current sensing and VSENSE for voltage feedback-allow implementation in either configuration without redesign. This versatility makes the IW3636-03 suitable for diverse LED driver form factors, from enclosed troffers to open-frame industrial drivers.

What protection features are integrated into the IW3636-03?

The IW3636-03 integrates single-point fault protection including output open-circuit, output short-circuit, output over-voltage, and input under-voltage detection. It also supports over-temperature protection via internal thermal shutdown or external NTC on the NTC/DIM2 pin. These features eliminate the need for external supervisors and ensure robust operation across environmental stresses in the IW3636-03 application.