ZXGD3101 Diodes, Inc., ZXGD3101 Datasheet - Page 4

• Manufacturer Part Number: ZXGD3101
• Description: Synchronous Rectifier Controller For Flyback Converters.
• Manufacturer: Diodes, Inc.

Schematic symbol and pin description
NOTES:
1. BIAS and REF pins should be assumed to be at GND+0.7V
Issue 4 - January 2009
© Diodes Incorporated 2009
Pin No.
1
2
3
4
5
6
7
8
Symbol
GATEH
GATEL
DRAIN
GND
BIAS
REF
V
NC
CC
D R A IN
Description and function
No connection
This pin can be connected to GND
Reference
This pin is connected to V
~3mA into this pin. See note 1
Gate turn off
This pin sinks current, I
Gate turn on
This pin sources current, I
Power Supply
This is the supply pin. It is recommended to decouple this point to ground
closely with a ceramic capacitor.
Ground
This is the ground reference point. Connect to the synchronous MOSFET Source
terminal.
Bias
This pin is connected to V
source 1.6 times I
Drain connection
This pin connects directly to the synchronous MOSFET Drain terminal.
+
+
-
-
com parator
com parator
H igh V o lt
H igh V o lt
R E F
REF
T hreshold V oltage
T urn-on/off C ontrol
G ate D rive C ontrol
into this pin. See note 1
SINK
C ontrol
CC
CC
SOURCE
, from the synchronous MOSFET Gate.
4
via resistor, R
via resistor, R
, to the synchronous MOSFET Gate.
B IA S
REF
BIAS
D river
. R
. R
G N D
REF
Vcc
BIAS
should be selected to source
should be selected to
ZXGD3101T8
G A T E H
G A T E L
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