Diodes ZXGD3105N8 - Manual

ZXGD3105N8
Document Number DS35101 Rev. 3 - 2
1 of 14
www.diodes.com
March 2013
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXGD3105N8
SYNCHRONOUS MOSFET CONTROLLER IN SO-8
Description
ZXGD3105N8 synchronous controller is designed for driving a
MOSFET as an ideal rectifier. This is to replace a diode for increasing
the power transfer efficiency.
Proportional Gate drive control monitors the reverse voltage of the
MOSFET such that if body diode conduction occurs a positive voltage
is applied to the MOSFET’s Gate pin. Once the positive voltage is
applied to the Gate the MOSFET switches on allowing reverse current
flow. The controllers’ output voltage is then proportional to the
MOSFET Drain-Source voltage and this is applied to the Gate via the
driver. This action minimizes body diode conduction whilst enabling a
rapid MOSFET turn-off as Drain current decays to zero.
Applications
Flyback Converters in:
 Low Voltage AC / DC Adaptors
 Set Top Box
 PoE Power Devices
Resonant Converters in:
 Telecoms PSU
 Laptop Adaptors
 Computing Power Supplies - ATX and Server PSU
Features
 Proportional Gate Drive to Minimize Body Diode Conduction
 Low Standby Power with Quiescent Supply Current < 1mA
 4.5V Operation Enables Low Voltage Supply
 25V V
CC
Rating
 100V Drain Voltage Rating
 Operation up to 500kHz
 Critical Conduction Mode (CrCM) & Continuous Mode (CCM)
 Compliant with Eco-Design Directive
 Totally Lead-Free & Fully RoHS compliant (Notes 1 & 2)
 Halogen and Antimony free. “Green” Device (Note 3)
 Qualified to AEC-Q101 Standards for High Reliability
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
 Solderable per MIL-STD-202, Method 208
 Weight: 0.074 grams (approximate)
Ordering Information
(Note 4)
Product Marking Reel size (inches) Tape width (mm) Quantity per reel
ZXGD3105N8TC ZXGD3105 13 12 2500
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 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
Marking Information
ZXGD = Product Type Marking Code, Line 1
3105 = Product Type Marking Code, Line 2
YY = Year (ex: 11 = 2011)
WW = Week (01 - 53)
Top View
Pin-Out
SO-8
ZXGD
3105
YY WW
GATE
GND
Vcc
BIAS
DRAIN REF
DNC
DNC