Datasheet > R2A20113

R2A20113

更新时间： 2024-11-21 09:46:03

品牌	Logo	应用领域
瑞萨 - RENESAS		功率因数校正
页数	文件大小	规格书
1页	103K
描述
Critical Conduction Mode PFC IC

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中文翻译

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R2A20113 数据手册

Renesas Critical Conduction Mode PFC IC

R2A20113

April 2010

Features

(1)AC high voltage line less

Simple External Circuit

Best for Small Power Supplies

• AC sense line less

(3) Reduce recovery diode loss

390V

• ZCD line less

No open/short detector, No turn-on at inrush

• Feedback loop detection

• High efficiency by Zero current switching

• Low radiation noise

(2) ZCD line less

19V

ＶＣＣ

• Small package: SOP8/DIP8

OUT

ＣＯＭＰ

Specification

Vcc Maximum

Tj operation

R2A2012X

24V

-40 to 150deg.

+/-0.9A

GND

OCP

ＲＴ

VREF

Drive peak current

Applications

R2A20113

Best support for power supplies of 1-phase operating

products that require low noise and downsizing

due to the power factor regulation for flat-screen TV, HDD recorder and AV home electronics.

1. ZCD Line Less

External open short detection circuit is unneeded

Getting ZCD signal pulse from the current sense resistor,

therefore ZCD auxiliary winding is unneeded.

390V

Unneeded!

OCP comp.

Open/Short Detector

ZCD comp.

R2A20113

Turn-on of MOSFET at inrush timing is prevented

ZCD Vth

GND

Out put Voltage

Input Current

OUT

R2A20113

2. Improvement of Load Reg. Adopting gmAMP

3．Dynamic OVP

In case of adopting gmAMP adopted, there is no

feedback current flow, and load regulation becomes good.

The R2A20113 has “Dynamic” and “Static” OVP.

Dynamic OVP is doing discharge error AMP voltage

before reaching Static OVP voltage. Therefore peak

current is limited. As the result, reduce over voltage

cause “No coil vibration”.

Acoustic noise

is reduced.

Acoustic noise

Conventional

R2A20113

VOUT

200ms/div

Error Amp Block^Vout

Error AMP

Feedback

VEO

COMP

ILm

input

20ms/div

VREF

OVP

Dynamic

OVP

Dynamic

OVP

4. Feedback Loop Detector

Feedback loop absence detect function can stop output

pulse. Therefore Renesas PFC IC prevents the breakings

of bulk capacitor and MOSFET.

5. Principle Power Loss Reduction

Continue conduction mode

Conventional

R2A20113

PFC out voltage

Recovery Loss of

Boost diode by ZCS

Basically,

no recovery diode

loss by zero current

switching too.

PFC out voltage

Detect the feedback loop

disconnection, and stop

the pulse!!

In case of feedback

loop down, bulk

voltage is going up

abnormal voltage.

Then capacitor is

broken.

In CCM case, switching loss and radiation noise are large.

cut

Prevent from the breakings of

Bulk capacitor & Power MOS!!!

Critical conduction mode

FET current

Drain voltage

Convention IC

(Without the

function)

R2A20113

In CRM case, switching loss and radiation noise are small

due to zero current and zero voltage switching.

Renesas Electronics URL http://www.renesas.com/pfcic

中文翻译

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与R2A20113相关器件

型号	品牌	获取价格	描述	数据表
R2A20113ASP	RENESAS	获取价格	Critical Conduction Mode PFC Control IC
R2A20113DD	RENESAS	获取价格	Critical Conduction Mode PFC Control IC
R2A20113SP	RENESAS	获取价格	Critical Conduction Mode PFC Control IC
R2A20113SP_09	RENESAS	获取价格	Critical Conduction Mode PFC Control IC
R2A20114	RENESAS	获取价格	Continuous Conduction Mode Interleaving PFC Control IC
R2A20114AFP	RENESAS	获取价格	Continuous Conduction Mode Interleaving PFC Control IC
R2A20114AFPW0	RENESAS	获取价格	Continuous Conduction Mode Interleaving PFC Control IC
R2A20114AFPW5	RENESAS	获取价格	Continuous Conduction Mode Interleaving PFC Control IC
R2A20114ASPW0	RENESAS	获取价格	Continuous Conduction Mode Interleaving PFC Control IC
R2A20114ASPW5	RENESAS	获取价格	Continuous Conduction Mode Interleaving PFC Control IC

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