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Diodes Incorporated
ZXGD3101N8
SYNCHRONOU S R ECTIFIER CONTROLLER
Schematic Symbol and Pin Out Details
Vcc
Gate drive
+
Differential
- amplifier
amplitude
control
DRAIN
+
High volt
- comparator
Turn-on/off
control
Driver
GATEH
Threshold
voltage
control
GATEL
REF
BIAS
GND
Pin No.
1
2
3
4
5
6
7
8
Symbol
NC
REF
GATEL
GATEH
V CC
GND
BIAS
DRAIN
Description and function
No connection
This pin can be connected to GND
Reference
This pin is connected to V CC via resistor, R REF . R REF should be selected to source approximately 3mA into this pin.
(Note 8)
Gate turn off
This pin sinks current, I SINK , from the synchronous MOSFET Gate.
Gate turn on
This pin sources current, I SOURCE , to the synchronous MOSFET Gate.
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 CC via resistor, R BIAS . R BIAS should be selected to source 1.6 times I REF into this pin.
(Note 9)
Drain connection
This pin connects directly to the synchronous MOSFET Drain terminal.
Notes:
8. REF pin should be assumed to be at GND +0.7V.
9. BIAS pin should be assumed to be at GND +0.3V.
ZXGD3101N8
Document Number DS31945 Rev. 1 - 2
4 of 14
www.diodes.com
June 2010
? Diodes Incorporated
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