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PDF ZXGD3109N8 Data sheet ( Hoja de datos )

Número de pieza ZXGD3109N8
Descripción SYNCHRONOUS MOSFET CONTROLLER
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Description
The ZXGD3109N8 is intended to drive a MOSFET configured as an
ideal diode replacement. The device is comprised of a high-voltage
detector stage and gate driver. The detector monitors the voltage
between the drain and the source of the MOSFET, and if this voltage
is less than the turn-on threshold voltage of the controller, a positive
voltage is applied to the MOSFET’s Gate Pin. As the load current
decays to zero, and the voltage between the drain and source of the
MOSFET increases beyond the turn-off threshold value, the MOSFET
is rapidly turned off.
Intelligent features of this IC are the Minimum Off-Time (TOFF) and
Minimum On-Time (TON). These features blanket the noise generated
during the turn-on and turn-off instances of the power FET. Also Light
Load Detection (LLD) for improved efficiency at light and no load,
where synchronous rectification is no more beneficial. Other features
include, Undervoltage Lockout (UVLO) and low turn-off threshold
voltage for improved efficiency.
Applications
Flyback Converters in:
Power Adaptors
Auxiliary Power Supplies
PoE Power Devices
Resonant Converters in:
High Power Adaptors
85+/90+ Compliant ATX and Server Power Supplies
ZXGD3109N8
SYNCHRONOUS MOSFET CONTROLLER IN SO-8
Features
Frequency of Operation Up to 500kHz
Suitable for Discontinuous Conduction Mode (DCM) and Critical
Conduction Mode (CrCM)
Minimum On-Time and Off-Time to Reduce Turn-On/Off
Oscillations
Intelligent Light Load Detection and Sleep Mode
Turn-Off Propagation Delay Time of 30ns Typically
Drain Voltage Rating of 200V
Recommended Operating Voltage from 4.5V up to 12V
Source and Sink Current of 2A and 4A Respectively
Low Component Count
Totally Lead-Free & Fully RoHS compliant (Notes 1 & 2)
Halogen and Antimony free. “Green” Device (Note 3)
Mechanical Data
Case: SO-8
Case Material: Molded Plastic. “Green” Molding Compound.
UL Flammability Classification Rating 94V-0
Moisture Sensitivity: Level 1 per J-STD-020
Terminals: Finish Matte Tin Plated Leads, Solderable per
MIL-STD-202, Method 208
Weight: 0.074 grams (Approximate)
SO-8
Top view
TON
TOFF/EN
VS
VD
Top View
Pin-Out
VCC
GND
GATE
PGATE
Ordering Information (Note 4)
Product
ZXGD3109N8TC
Marking
ZXGD3109
Reel Size (inches)
13
Tape Width (mm)
12
Quantity per Reel
2,500
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.
4. For packaging details, go to our website at http://www.diodes.com/products/packages.html.
ZXGD3109N8
Document Number DS37178 Rev. 1 - 2
1 of 13
www.diodes.com
December 2015
© Diodes Incorporated

1 page




ZXGD3109N8 pdf
Recommended Operating Conditions
Symbol
VCC
VDS
FSW
TJ
RTOFF
RTON
CVCC
Parameter
Supply Voltage Range
Voltage Cross Drain and Source
Switching Frequency
Operating Junction Temperature Range
TOFF Resistor Value
TON Resistor Value
VCC Bypass Capacitor
ZXGD3109N8
Min Max
4.5 12
-1 200
20 600
-40 +125
85 200
8.25
10
100
Unit
V
kHz
°C
k
k
μF
Thermal Derating Curve
0.8
0.7 15mm x 15mm
0.6 10mm x 10mm
0.5
0.4
0.3
Minimum
Layout
0.2
5mm x 5mm
0.1
0.0
0 20 40 60 80 100 120 140 160
Junction Temperature (°C)
Derating Curve
ZXGD3109N8
Document Number DS37178 Rev. 1 - 2
5 of 13
www.diodes.com
December 2015
© Diodes Incorporated

5 Page





ZXGD3109N8 arduino
Typical Performance Characteristics (Cont.)
ZXGD3109N8
Figure 13
Figure 14
ZXGD3109N8
Document Number DS37178 Rev. 1 - 2
11 of 13
www.diodes.com
December 2015
© Diodes Incorporated

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