Datasheet > iW3638

iW3638

更新时间： 2024-11-24 14:58:07

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
6页	510K
描述
Second-Stage Buck LED Driver with Exceptional Deep Dimming Performance for Commercial Lighting Applications

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iW3638 数据手册

iW3638

High-Power Step-Down LED Driver Supports

Wide Range of PWM Dimming Interfaces

1 Description

The iW3638 is a high-performance second-stage buck LED driver optimized to supply constant-current to LEDs directly

from DC power supplies typically below 100V. The controller supports a non-isolated buck-converter topology to post-

regulate from an oﬀ-line AC/DC converter, minimizing low frequency output ripple current and eliminating virtually all

ﬂicker in the system. It uses Renesas’ PrimAccurate™ advanced sensing technology to achieve excellent output

current regulation without the need for direct voltage and current feedback components. It also eliminates the need for

external loop compensation while maintaining stability across all operating conditions.

The iW3638 oﬀers a 1% to 100% dimming range and provides a dedicated PWM dimming input pin that supports a wide

variety of dimming application interfaces such as wireless modules, MCUs or 0-10V interfaces. In addition, the iW3638

accepts a secondary dimming input pin to allow maximum output current conﬁguration.

Renesas’ innovative proprietary technology maximizes the iW3638 performance in an SOIC-8 package. It provides

maximum design ﬂexibility by providing two multi-function pins to conﬁgure IC functions such as the dimming curve and

minimum dimming level. Additionally, the iW3638 features a soft-oﬀ function before entering into light-oﬀ mode, where

the device remains alive with minimal standby power consumption.

2 Features

● Wide V_CCoperating range from 7.5V to 30V

● Fast dimming transient response

● Supports wide DC input voltage with tight output

current regulation (±3%)

● Enhanced MOSFET driver supports output power up

● Built-in over-temperature protection or by external NTC

● Conﬁgurable dimming curve: linear or logarithmic

to 90W or above in an SOIC-8 package

● Dual dimming interfaces

● Low standby power

● Built-in soft-start achieves fast and smooth start-up for

all diﬀerent operating conditions

● Supports 0-10V dimming with the iW339 series

● Built-in single-point fault protection features: output

open, output over-voltage, output short and input

voltage under-voltage protections

interface controllers

● Wide dimming range 1% - 100%

● Light-oﬀ mode with soft-oﬀ feature

● Conﬁgurable minimum dimming setting: dim-to-oﬀ,

1%, 5% or 10%

3 Applications

● 0-10V dimmable LED drivers

● Dimmable commercial T8

● External and ﬁxture driver lighting applications

● Wireless and intelligent LED lighting

Rev. 1.3

05-Apr-2023

Product Summary

www.renesas.com

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iW3688	RENESAS	获取价格	Advanced, Single-Stage, LED Driver Offers Best Dimming Performance and Dimmer Compatibilit
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