Datasheet > W1699B

W1699B

更新时间： 2024-11-21 12:56:39

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
6页	372K
描述
Off-Line Digital Green-Mode Quasi-Resonant PWM Controller

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W1699B 数据手册

iW1699B Product Summary

Off-Line Digital Green-Mode

Quasi-Resonant PWM Controller

1.0 Features

2.0 Description

● No-load power consumption < 30mW at 230V_ACalong The iW1699B is a high performance AC/DC

with fast dynamic load response and short turn-on power supply controller that uses digital control

delay in typical 5V, 2.4A 12W compact adapter/charger technology to build peak current mode PWM

applications

ﬂyback power supplies. The device 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,

● Tight constant-voltage and constant current regulation

across line and load range

● Primary-side feedback eliminates opto-isolators and simplifying EMI design and lowering the total bill of material

simpliﬁes design

cost.TheiW1699Bremovestheneedforsecondaryfeedback

circuit while achieving excellent line and load regulation. It

also eliminates the need for loop compensation components

while maintaining stability over all operating conditions.

● Intelligent low power management achieves ultra-low

operating current (~250μA) at no-load

● Proprietary optimized 89kHz maximum PWM switching Pulse-by-pulse waveform analysis allows for a loop response

frequency with quasi-resonant operation achieves best that is much faster than traditional solutions, resulting in

size, efﬁciency and common mode noise

improved dynamic load response. The built-in power limit

function enables optimized transformer design in universal

off-line applications and allows for a wide input voltage

range.

● User-conﬁgurable 5-level cable drop compensation

provides design ﬂexibility

●

EZ-EMI^®design enhances manufacturability

Dialog’s innovative proprietary technology ensures that

power supplies built with the iW1699B can achieve both

highest average active efﬁciency and less than 30mW

no-load power consumption, and have fast dynamic load

response in a compact form factor in typical 5V, 2.4A 12W

applications. The active start-up scheme enables shortest

possible start-up time without sacriﬁcing no-load power loss.

● Adaptive multi-mode PWM/PFM control improves

efﬁciency

● Complies with EPA 2.0 energy-efﬁciency speciﬁcations

with ample margin

● Built-in single-point fault protections against output

short-circuit, output over-voltage and output over-current

● Dedicated pins for external over-temperature protection

3.0 Applications

● Compact AC/DC adapters or chargers for media tablets

and over-voltage protection, with latch function available

● SmartDefender™ smart hiccup technology helps to

address issues of soft shorts in cables and connectors

by effectively reducing the average output power at fault

conditions without latch

and smart phones

● AC/DC adapters for consumer electronics

● Optional on-chip internal over-temperature protection

● No audible noise over entire operating range

iW1699B

Rev. 1.5

Product Summary

1 of 6

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