Datasheet > iW1677-00

iW1677-00

更新时间： 2024-11-20 01:05:59

品牌	Logo	应用领域
DIALOG		/
页数	文件大小	规格书
16页	763K
描述
Low-Power Off-Line Digital Green-Mode PWM Controller

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iW1677-00 数据手册

iW1677

Low-Power Off-Line Digital Green-Mode PWM Controller

1 Description

The iW1677 is a high performance AC/DC power supply controller which uses digital control technology to build

peak current mode PWM ﬂyback power supplies. The device together with an external active device (depletion mode

NFET or NPN BJT) provides a fast start-up without compromising no-load power loss. The device directly drives

a power BJT and operates in quasi-resonant mode to provide high efﬁciency along with a number of key built-in

protection features while minimizing the external component count, simplifying EMI design and lowering the total bill of

material cost. The iW1677 removes the need for secondary feedback circuitry while achieving excellent line and load

regulation. It also eliminates the need for loop compensation components while maintaining stability over all operating

conditions. Pulse-by-pulse waveform analysis allows for a loop response that is much faster than traditional solutions,

resulting in improved dynamic load response for both one-time and repetitive load transients. The built-in power limit

function enables optimized transformer design in universal off-line applications and allows for a wide input voltage

range.

Dialog’s innovative proprietary technology ensures that power supplies built with the iW1677 can achieve both highest

average efﬁciency and less than 20mW no-load power consumption, and have fast dynamic load response in a

compact form factor. The active start-up scheme enables shortest possible start-up time without sacriﬁcing no-load

power loss.

2 Features

● No-load power consumption < 20mW at 230 V_ACwith

● Adaptive multi-mode PWM/PFM control improves

efﬁciency

typical application circuit (5 star rating)

● Fast dynamic load response for both one-time and

repetitive load transients

● Quasi-resonant operation for highest overall efﬁciency

● Direct drive of low-cost BJT switch

● Very tight constant voltage and constant current

regulation over entire operating range

● Dynamic base current control

● No external loop compensation components required

● PrimAccurate^TMprimary-side feedback eliminates

opto-isolators and simpliﬁes design

● Complies with EPA 2.0 energy-efﬁciency

speciﬁcations with ample margin

● Low EMI design enhances manufacturability

● Intrinsically low common mode noise

● Built-in soft start

● Built-in short circuit protection and output overvoltage

● Optimized 72kHz maximum PWM switching frequency

achieves best size and efﬁciency

protection

● Built-in current sense resistor short circuit protection

● No audible noise over entire operating range

● Active start-up scheme enables fastest possible start-

3 Applications

● Compact low power AC/DC adapter/chargers for cell

phones, PDAs, digital still cameras

● Linear AC/DC replacement

3-June-2016

Datasheet

Rev. 2.0

www.dialog-semiconductor.com

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与iW1677-00相关器件

型号	品牌	获取价格	描述	数据表
iW1677-01	DIALOG	获取价格	Low-Power Off-Line Digital Green-Mode PWM Controller
iW1677-03	DIALOG	获取价格	Low-Power Off-Line Digital Green-Mode PWM Controller
iW1677-05	DIALOG	获取价格	Low-Power Off-Line Digital Green-Mode PWM Controller
IW1678	DIALOG	获取价格	Low-Power Off-line Digital Green-Mode PWM Controller
iW1678	RENESAS	获取价格	Low-Power Off-line Digital Green-Mode PWM Controller
IW1678-00	DIALOG	获取价格	Low-Power Off-line Digital Green-Mode PWM Controller
IW1678-01	DIALOG	获取价格	Low-Power Off-line Digital Green-Mode PWM Controller
IW1678-03	DIALOG	获取价格	Low-Power Off-line Digital Green-Mode PWM Controller
IW1688	ETC	获取价格	Low-Power Off-line Digital PWM Controller 恒流恒
IW1689	DIALOG	获取价格	Low-Power Off-line Digital PWM Controller

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