HA16174 RENESAS [Renesas Technology Corp], HA16174 Datasheet

HA16174

Manufacturer Part Number

HA16174

Description

Renesas PFC Control IC for Digital-TV

Manufacturer

RENESAS [Renesas Technology Corp]

Datasheet

1.HA16174.pdf (1 pages)

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Renesas PFC Control IC for Digital-TV

HA16174

1. Continuous Conduction Mode

3. Hold function against AC Temporary Blackout

AC input

Hold counter

Bulk voltage

Gate output

(HA16174)

FET OUT

(Conventional IC)

5. Quick Soft Start Shortens S/S time

Soft start

Triangle waveform

(1) Continuous conduction

In case of lout change

In case of continuous

current mode, peak current

not so much changing.

In case of critical current

mode, the peak current

changing so large.

Renesas Electronics

1. Continuous conduction mode suitable for the system with a large amount and frequency of a current change.

2. ON/OFF support of the main converter and the load by a PG signal and a hold function.

3. Hold function against an AC temporary blackout

4. Over-voltage protection with a feedback loop absence detecting function

5. Quick soft-start

6. Improvement of the load regulation by a Gm amplifier

Input voltage

Features

High reliability by all required functions integrating

(2) Critical conduction

The hold function achieves fast recovery since IC operation does not

stop until a specified time even in case of bad power condition.

Single-function PFC control IC

HA16174

Choke coil current

AC temporary blackout

Hold function against

Input average current

AC temporary blackout

Hold function against

100/200V

selector

Gain

Large current change

Gain selector

PFC unit

Popular soft start time

100/200V

Soft start

Renesas

blackout

with feedback loop absence

PFC unit

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

• Small radiation noise

• Small peak current

• Strong to

• Relatively-simple

circuit

Over-voltage protection

current change

Advantages

adjustment function

detecting function

OVP

P.G circuit with

ON/Off timing

Css=4.7uF

Shortened time=4.7uFX1V/25uA=188ms.

Hold timer (Adjustable)

with feedback loop absence

ON/Off timing adjustment

Over-voltage protection

Soft start circuit

380V

detecting function

P.G circuit &

380V

•Some complicated

circuit

• Large choke coil

• Large peak current

• Indefinite frequency

at high current area.

Weak points

S/S: Soft start

•The HA16174 stabilizes the over-current control of PFC unit and sets the

S/S ineffective time by a hold function in time of an AC temporary blackout.

•The HA16163 makes up a full bridge and achieves small and high

efficiency trances.

Example of Application Circuit

Small and high reliability system

4. Over-voltage Protection

2. ON/OFF Support for Main Converter and Load

6. Improvement of Load Regulation by gm Amp.

Current type of circuit suffers an affection

of the feedback current flow because R1,

R2 impedance is not ideal.

AC input

Bulk voltage

Hold counter

PG signal

Ex.) Enable to start or stop the main converter in the normal sequence by using a PG signal.

Feedback loop absence detection can stop output pulse.

Therefore Renesas PFC IC prevents the breakings of bulk capacitor and MOSFET.

with a Feedback Loop Absence Detecting Function

in Feedback Loop

VOUT

cut

HA16174

Gate output

Conventional IC

RJK5015

Conventional IC

w/o this function

Bulk voltage

The feedback loop is

down case, bulk

voltage is going up

abnormal voltage.

Then capacitor is

broken.

VREF

Amp. for FB

P.G signal

VEO

HA16163

380V

cut

Output the PG signal at the setting time

by a hold counter late to stabilize after

the bulk voltage reaches the provision.

VOUT

In case of gmAMP, there is no affection

of feedback current flow, and load

regulation becomes good.

HA16174

PFC-ON

PG off voltage (Adjustable)

PGADJ

Detect the feedback

loop disconnection, and

stop the pulse!

Prevent from the breakings of

bulk capacitance and power

MOS!!

DELEY

HA16174

Bulk voltage

VREF

CAO

OUT

GND

HA16167

VREF

HA16174

Stop the PG signal, when

a bulk voltage drops to

less than setting voltage

(Vth).

Amp. for FB

12V

SOP16

DIP16

April 2010

VCC

IAC

1.2V

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