Diodes ZXGD3101T8 - Manual (Page 4)

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