Datasheet > iW3662

iW3662

更新时间： 2024-11-10 14:57:51

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
6页	641K
描述
Low Voltage SSL LED Driver for MR16 Applications Offers Universal Transformer Compatibility and Superior Dimmer Compatibility

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iW3662 数据手册

iW3662

Low Voltage (12V_AC) Dual-Mode Digital

Control Dimmable LED Driver

1 Description

The iW3662 advanced digital LED driver, designed for low voltage AC and DC input voltages, combines support for

both low voltage LEDs and high voltage Chip-On-Board (COB) LED modules at power levels up to 8W.

The iW3662 features two selectable operating modes to accommodate both low voltage LEDs and high voltage COB

LEDs in one part. The Boost-Buck mode provides a boost converter to step-up the input voltage to an intermediate

voltage, which a second buck regulator stage steps down to create a highly eﬃcient, constant current LED controller.

The Boost-Linear mode, designed to work with high voltage COB LEDs, steps up the input voltage to a higher voltage

than in the Boost-Buck mode, then, with the buck converter now disabled and reconﬁgured into a linear current

regulator, provides a highly accurate constant current sink to drive the LEDs.

The highly conﬁgurable digital control circuitry allows the end user to specify one part for multiple applications,

covering the bulk of low voltage LED replacement bulb applications. Using Dialog’s Flickerless™ technology

allows the iW3662 to operate without visible ﬂicker and operate with a broad range of input dimmer types (leading

edge, trailing edge and digital) while eﬀectively detecting and managing both electronic and magnetic transformers

automatically. When the iW3662 detects a magnetic transformer, an additional output drives an external switch

that can add extra input capacitance needed to ensure proper operation, easing the design of replacement bulbs

compatible with both transformer types.

The iW3662 also integrates an internal bleeder FET to add a dynamic load to the input to optimize electronic

transformer performance during low dimming ranges. Also, full protection features include over-temperature

protection derating, which lowers the output current drive to the LEDs when an over-temperature event occurs to

maintain light output even during a fault condition. These protection features provide robust and functional solutions

for low voltage LED replacement lighting.

2 Features

● Wide dimmer compatibility (leading edge, trailing

● 10 to 24V_DCinput voltage or 12V_ACinput voltage

● Output power up to 8W

edge, and digital)

● Deep dimming to 5% (depends on dimmers)

● Power factor > 0.7

● Supports magnetic or electronic transformers

● Two operational modes

● Tight LED current regulation (±5%) in both modes

Boost-Buck - low voltage LED arrays

Boost-Linear - high voltage COB LEDs

● Optimized dimming curve for maximizing dimmer and

electronic transformer compatibility

● Integrated boost controller and buck/linear current

● Over-temperature protection derating

● OVP, OCP, and open load protection

● 16-lead QFN (4mm x 4mm) package

regulator controller

● Flickerless™ technology for ﬂicker-free LED dimming

3 Applications

● V_ACor V_DCinput dimmable LED lighting

● Optimized for use with all transformers, including

electronic and magnetic

● MR16 bulbs, AR111 ﬁxtures/bulbs

06-Feb-2022

Product Summary

Rev. 1.5

1 of 6

www.renesas.com

12 3 4 5 6

中文翻译

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