AR2003FV

1 of 15

December 2014

Document number: DS37473 Rev. 3 - 2

www.diodes.com

© Diodes Incorporated

AR2003FV

ACTIVE/SYNCHRONOUS RECTIFICATION CONTROLLER

Description

The

AR2003FV

is

Active/Synchronous

Rectification

Controller,

providing output voltage from 4.5V to 21V. Using internal drain-to-

source voltage sensing, the AR2003FV is ideal for Fly-back, LLC-

resonant and other power supply architectures. It has SFB pin that

can eliminate the external feedback resistor when target output

voltage is 5V or 12V.

The small footprint of the AR2003FV makes it ideal for space

constrained applications.

Intelligent features of this IC are the Minimum Off Time (TOFF) and

Minimum on Time (TON), these features blank the noise generated

during the turn on and turn off instances of the power FET. Light load

detection for improved efficiency at light and no load is implemented.

Other features include Under Voltage Lock Out (UVLO), SYNC

feature for CCM operation and low turn off threshold voltage for

improved efficiency.

Features



Primary-Side

or

Secondary-side

Active/Synchronous

Rectification, Optimized for Systems with Dynamic Voltage

Scaling Capabilities



Frequency of Operation up to 600kHz



Suitable for Discontinuous (DCM), Continuous (CCM) and

Critical (CrCM) Conduction Mode



Minimum

On-time

and

Off-time

to

Blanking

Turn-on/off

Oscillations



Light Load Detection and Sleep Mode



Drain Voltage Rating of 200V



Recommended Operating Voltage from 4.5V up to 21V



Low Component Count.



Low Under Voltage Lockout



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and

Antimony Free. “Green” Device (Note 3)

Pin Assignments

(Top View)

3

4

5

6

7

14

13

12

11

10

1

2

9

8

VD

AGND

TON

NC

TOFF/EN

SFB

OVS

NC

VS

VD

VCC

GND

DGATE

SYNC

GATE

V-DFN3535-14

Applications



USB PD Adaptor



AC-DC Battery Charger



Fly-back Conversion



PC Power Supply



SMPS



Power Adaptors



Auxiliary Power Supplies



PoE Power Devices

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html

for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.