Datasheet > iW1700

iW1700

更新时间： 2024-11-24 14:58:03

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
16页	834K
描述
PrimAccurate? Zero No-Load Power Off-Line Digital PWM Controller in a SOT-23 Package

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iW1700 数据手册

iW1700

Zero Power No-Load Oﬀ-Line Digital PWM Controller

1 Description

The iW1700 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 meanwhile achieving ultra-low no-load power consumption. 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 iW1700 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 transient. 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 iW1700 can achieve both highest

average eﬃciency and zero no-load power consumption, and have fast load transient 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

● Active start-up scheme enables fastest possible start-up

● Zero power consumption at no-load with lowest

system cost (< 5 mW at 230 V_ACwith typical

application circuit)

● Adaptive multi-mode PWM/PFM control improves

eﬃciency

● Intelligent low power management achieves ultra-low

operating current at no-load

● Quasi-resonant operation for highest overall eﬃciency

● Direct drive of low-cost BJT switch

● Adaptive load transient detection and fast response

● No external compensation components required

● Very tight constant voltage and constant current

regulation over entire operating range

● Complies with EPA 2.0 energy-eﬃciency speciﬁcations

with ample margin

● PrimAccurate^TMprimary-side feedback eliminates

● Built-in soft start

optocouplers and simpliﬁes design

● EZ-EMI^TMdesign enhances manufacturability

● Built-in short circuit protection and output overvoltage

protection

● Intrinsically low common mode noise

● Built-in current sense resistor short circuit protection

● No audible noise over entire operating range

● Optimized 72kHz maximum PWM switching

frequency achieves best size and eﬃciency

3 Applications

● Compact AC/DC adapter/chargers for cell phones,

PDAs, digital still cameras

● Linear AC/DC replacement

Datasheet

Rev. 1.8

10-Feb-2022

1 of 16

www.renesas.com

12 3 4 5 6 7...16

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与iW1700相关器件

型号	品牌	获取价格	描述	数据表
IW1700-00	DIALOG	获取价格	Zero Power No-Load Off-Line Digital PWM Controller
IW1700-01	DIALOG	获取价格	Zero Power No-Load Off-Line Digital PWM Controller
IW1700-03	DIALOG	获取价格	Zero Power No-Load Off-Line Digital PWM Controller
IW1700-05	DIALOG	获取价格	Zero Power No-Load Off-Line Digital PWM Controller
iW1702	RENESAS	获取价格	45W Digital AC/DC PWM Controller with Configurable Light Load Operation Mode Optimized for
IW1706	DIALOG	获取价格	Low-Power Off-Line Digital Green-Mode PWM Controller
iW1706	RENESAS	获取价格	PrimAccurate? Off-Line Digital PWM Controller in a SOT-23 Package
IW1706-00	DIALOG	获取价格	Low-Power Off-Line Digital Green-Mode PWM Controller
IW1706-01	DIALOG	获取价格	Low-Power Off-Line Digital Green-Mode PWM Controller
IW1706-03	DIALOG	获取价格	Low-Power Off-Line Digital Green-Mode PWM Controller

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