Datasheet > iW350

iW350

更新时间： 2024-11-24 14:57:39

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
6页	427K
描述
Highly Programmable 3-in-1 Secondary-Side Signal Interface Controller with Optimized Output Drive

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iW350 数据手册

iW350

SSL Interface Controller for Analog (0-10V), PWM, and

Resistor Dimming with Optocoupler Delay Elimination

1 Description

The iW350 is a PWM signal generator that works with three diﬀerent types of dimming inputs, 0-10V PWM dimming,

0-10V linear dimming or simple dimming using a single resistor to ground from the DIM pin. The iW350 auto detects the

dimmer type connected. A PWM dimming type is directly used, while the 0-10V linear dimming and resistor dimming

signals are converted into a 0%-100% PWM duty cycle that can then be used to provide a dimming signal to a primary-

side LED driver such as the iW3636, removing the need for transformers or other driver circuitry. The output of the iW350

is optimized in such a way as to remove the impact of the non-linear delay typical of optocouplers.

The iW350 oﬀers a high level of ﬂexibility by oﬀering programmability for the maximum dimming voltage, minimum output

duty cycle and the turn-oﬀ threshold voltage through external resistors. The output PWM frequency is also programmable

from 100Hz to 5kHz through a single capacitor to ground. The input to the iW350 integrates the necessary current

source to interface with both active and passive 0-10V dimmers without additional circuitry, while the output can drive an

optocoupler to provide isolated dimming control from the secondary to the primary.

2 Features

● SOIC-8 package

● 15V to 60V operating voltage

● External resistor conﬁguration

● 3-in-1 dimmer interface

Programmable max dimming voltage: 8.5V, 9V,

9.5V and 10V

0-10V PWM dimming

0-10V linear dimming

Single resistor dimming

Programmable minimum duty cycle: 1%, 3%, 5%

and 10%

● Dimmer type - auto detect

PWM or DC input dimming signal

● 0% to 100% PWM output

Programmable turn-oﬀ threshold: 0.5V, 0.6V, 0.7V

and 0.8V

● Programmable PWM output frequency range: 100Hz-

5kHz

1% PWM duty cycle tolerance

● Integrated current source for driving 0-10V dimmer

● Low power shutdown mode

Selectable frequency range via external capacitor

Unique duty cycle drive to account for non-linear

optocoupler delay

● Integrated optocoupler driver for isolated applications

3 Applications

● 0-10V LED dimming application

● 3-in-1 LED driver interface chip (0-10V linear, 0-10V

PWM and R dimming) dimming LED driver application

08-Apr-2022

Product Summary

Rev. 0.7 Preliminary

www.renesas.com

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