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PDF AR2003FV Data sheet ( Hoja de datos )

Número de pieza AR2003FV
Descripción ACTIVE/SYNCHRONOUS RECTIFICATION CONTROLLER
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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.
Pin Assignments
(Top View)
AGND 3
TON
2
NC
1
14 VCC
TOFF/EN 4
13 GND
SFB 5
VD 12 DGATE
OVS 6
11 SYNC
NC 7
8
VS
10 GATE
9
VD
V-DFN3535-14
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)
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.
AR2003FV
Document number: DS37473 Rev. 3 - 2
1 of 15
www.diodes.com
December 2014
© Diodes Incorporated

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AR2003FV pdf
Absolute Maximum Ratings (Note 4)
Symbol
Parameter
VCC
Input Voltage Range VCC
VD Input Voltage Range VD
VS Input Voltage Range VS
TOFF/EN, TON, OVS, SYNC Input Voltage Range Other
TJ
TL
TST
ESD
Operating Junction Temperature
Lead Temperature
Storage Temperature
Human Body Model, JESD22-A114
Charged Device Model, JESD22-C101
Rating
-0.3 to 24
-1 to 200
-1 to 1
-0.3 to 6
-40 to +150
+ 260
-65 to +150
2
0.5
Note 4: These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure.
Operation at the absolute maximum rating for extended periods may reduce device reliability.
AR2003FV
Unit
V
V
V
V
°C
°C
°C
kV
Package Thermal Data (@TA = +25°C, unless otherwise specified)
Symbol
PD
RθJA
RθJC
Parameter
Power Dissipation (Note 5)
Thermal Resistance, Junction to Ambient Air (Note 6)
Thermal Resistance, Junction to Case (Note 7)
Notes:
5. Device mounted on FR-4 PCB, 2oz with minimum recommended pad layout.
6. Device mounted on 25mm x 25mm 2oz copper board.
7. Device mounted on 50mm x 50mm 2oz copper board.
Recommended Operating Conditions
Symbol
VCC
VDS
fSW
TJ
RTOFF
RTON
CVCC
TWsync
Parameter
Supply Voltage Range
Voltage Cross Drain and Source
Switching Frequency
Operating Junction Temperature Range
TOFF Resistor Value
TON Resistor Value
VCC Bypass Capacitor
Sync Pulse Width
Rating
0.67
36
21
Unit
W
°C/W
°C/W
Min Max Unit
4.5 21
V
-1 200
20 600 kHz
-40 +125 °C
85 200 kΩ
8.25 100 kΩ
10 – μF
20 nS
AR2003FV
Document number: DS37473 Rev. 3 - 2
5 of 15
www.diodes.com
December 2014
© Diodes Incorporated

5 Page





AR2003FV arduino
AR2003FV
Modes of Operation
General Description
AR2003FV is an Active/Synchronous Rectifier which can work with many different primary side controllers. AR2003FV can be used in both SSR
and PSR systems.
AR2003FV has preset of internal feedback resistor that can reduce external BOM for 5V or 12V system.
UVLO MODE
When VCC does not reach UVLOTH, or falls blow UVLOTH - UVLOHYS, AR2003FV will be in UVLO MODE.
In this mode, AR2003FV will turn off external MOSFET, and TOFF/EN pin will internally short to GND. VCC current will be ICCSTART.
Sleep Mode
Sleep Mode is a low-power operating mode similar to UVLO Mode, except that this mode is entered by forcing VEN below the VEN-OFF threshold via
external control. Many internal circuits are turned off to reduce power consumption in this model to reduce device operating losses. External control
overrides any internal timing conditions, and immediately forces the GATE output low and enters Sleep Mode. VCC current is reduced to
ICCSTANDBY level. As VEN is restored to above the VEN-ON threshold, the device exits Sleep Mode into Light-Load Mode after a delay of several μs,
allowing re-powered internal circuits to settle.
Active Mode
This is the normal operation mode when inductor current is large enough and synchronous conduction time is longer than TON. AR MOSFET will be
turned on and off according to VD-VS, TON and TOFF setting and SYNC pin.
Light-Load Mode
When Inductor current is small and synchronous conduction time is less than TON, the AR MOSFET will be kept OFF to reduce switching power
loss. Voltage across body diode of AR MOSFET is continuously monitored. When the MOSFET body-diode conduction time is more than TON, the
device will be back to Active mode again.
Over Voltage Protection
Over Voltage mostly likely was an indication of optical coupler short. Therefore, just reporting output error information is not enough. AR2003FV will
drive an external FET to create a short situation so that primary side can be set to whole system to restart.
Over Temperature Protection (Only for Secondary-side Synchronous Rectification Application)
When AR2003FV is over heated, AR2003FV will light up the optical coupler to let the primary side deliver very little or no energy so that the whole
system will cool down. Hysteresis is set to +25°C.
Usually, VCC might drop blow UVLOTH - UVLOHYS (around 2.8V) due to system load. AR2003FV will enter UVLO mode, and system might restart
again. If AR2003FV is over heated again in short time, VCC might be kept around 2.8V. The primary side controller might treat this event as over
current or short current, and enters its protection mode.
Over Current Protection
Over Current Protection is not implemented in AR2003FV. Over Current Protection will be carried out in Primary side.
Short Current Protection
Short Current Protection is not implemented in AR2003FV. Short Current Protection handling will be carried out in Primary side.
AR2003FV
Document number: DS37473 Rev. 3 - 2
11 of 15
www.diodes.com
December 2014
© Diodes Incorporated

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