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NCD5703ADR2G Datasheet(PDF) 6 Page - ON Semiconductor

Part # NCD5703ADR2G
Description  High Current IGBT Gate Drivers
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCD5703ADR2G Datasheet(HTML) 6 Page - ON Semiconductor

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NCD5703A, NCD5703B, NCD5703C
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6
Table 1. PIN FUNCTION DESCRIPTION
Pin Name
No.
I/O/x
Description
VIN
1
I
Input signal to control the output. In applications which require galvanic isolation, VIN is generat-
ed at the opto output, the pulse transformer secondary or the digital isolator output. VO (VOH/
VOL) signal is in phase with VIN. VIN is internally clamped to GND and has a pull−down resistor
of 1 M
W to ensure that an output is low in the absence of an input signal. A minimum pulse−
width is required at VIN before VO (VOH/VOL) is activated.
VREF
2
O
5 V Reference generated within the driver is brought out to this pin for external bypassing and
for powering low bias circuits (such as digital isolators).
FLT
3
O
Fault open drain output (active low) that allows communication to the main controller that the
driver has encountered a fault condition and has deactivated the output. Open drain allows easy
setting of (inactive) high level and parallel connection of multiple fault signals.
Connect to 10k pull−up resistor recommended. Truth Table is provided in the datasheet to indi-
cate conditions under which this signal is asserted. Capable of driving optos or digital isolators
when isolation is required.
DESAT
4
I
Input for detecting the desaturation of IGBT due to a fault condition. A capacitor connected to
this pin allows a programmable blanking delay every ON cycle before DESAT fault is processed,
thus preventing false triggering.
VCC
5
x
Positive bias supply for the driver. The operating range for this pin is from UVLO to the maxi-
mum. A good quality bypassing capacitor is required from this pin to GND and should be placed
close to the pins for best results.
VO
(NCD5703A,
NCD5703B)
6
O
Driver output that provides the appropriate drive voltage, source and sink current to the IGBT
gate. VO is actively pulled low during start−up and under Fault conditions.
VOH
(NCD5703C)
6
O
Driver high output that provides the appropriate drive voltage and source current to the IGBT
gate.
VOL
(NCD5703C)
7
O
Driver low output that provides the appropriate drive voltage and sink current to the IGBT gate.
VOL is actively pulled low during start−up and under Fault conditions.
GND
(NCD5703A,
NCD5703B)
7
x
This pin should connect to the IGBT Emitter with a short trace. All power pin bypass capacitors
should be referenced to this pin and kept at a short distance from the pin.
GND
(NCD5703C)
8
x
This pin should connect to the IGBT Emitter with a short trace. All power pin bypass capacitors
should be referenced to this pin and kept at a short distance from the pin.
VEE
(NCD5703B)
8
x
A negative voltage with respect to GND can be applied to this pin and that will allow VO to go to
a negative voltage during OFF state. A good quality bypassing capacitor is needed from VEE to
GND. If a negative voltage is not applied or available, this pin must be connected to GND.
CLAMP
(NCD5703A)
8
I/O
Provides clamping for the IGBT gate during the off period to protect it from parasitic turn−on. To
be tied directly to IGBT gate with minimum trace length for best results.


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