NCD5703A, NCD5703B, NCD5703C
www.onsemi.com
19
Figure 29. Input and Output Signal Parameters for Opto−coupler
V
IN-H1
V
IN-NC
V
IN
V
IN-L1
t
pd-on
t
rise
t
fall
t
on-min
t
pd-on
V
OUT
90%
10%
Use of VREF Pin
The NCD5703 provides an additional 5.0 V output
(VREF) that can serve multiple functions. This output is
capable of sourcing up to 10 mA current for functions such
as opto−coupler interface or external comparator interface.
The VREF pin should be bypassed with at least a 100 nF
capacitor (higher the better) irrespective of whether it is
being utilized for external functionality or not. VREF is
highly stable over temperature and line/load variations (see
characteristics curves for details)
Fault Output Pin
This pin provides the feedback to the controller about the
driver operation. The situations in which the FLT
signal
becomes active (low value) are summarized in the Table 6.
Table 6. FLT LOGIC TRUTH TABLE
VIN UVLO DESAT Internal TSD VOUT FLT Notes
L Inactive L L L Open drain Normal operation − Output High
H Inactive L L H Open drain Normal operation − Output Low
X Active X L L L
UVLO activated − FLT Low (t
d3
-
FLT
), Output Low
(t
d3
-
FLT
+ t
d1−OUT
)
L Inactive H L L L DESAT activated (only when V
IN
is low) − Output Low
(t
d2_OUT
), FLT Low
X Inactive X H L L
Internal Thermal Shutdown − FLT Low (t
d3
-
FLT
), Out-
put Low (t
d3
-
FLT
+ t
d1−OUT
)
Thermal Shutdown
The NCD5703 also offers thermal shutdown function that
is primarily meant to self−protect the driver in the event that
the internal temperature gets excessive. Once the
temperature crosses the T
SD
threshold, the FLT output is
activated after a delay of t
d3-FLT
. After a delay of t
d1−OUT
(12 ms), the output is pulled low and many of the internal
circuits are turned off. The 12 ms delay is meant to allow the
controller to perform an orderly shutdown sequence as
appropriate. Once the temperature goes below the second
threshold, the part becomes active again.
NCD5703A, NCD5703B, NCD5703C
www.onsemi.com
20
PACKAGE DIMENSIONS
SOIC−8 NB
CASE 751−07
ISSUE AK
SEATING
PLANE
1
4
58
N
J
X 45
_
K
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
6. 751−01 THRU 751−06 ARE OBSOLETE. NEW
STANDARD IS 751−07.
A
B
S
D
H
C
0.10 (0.004)
DIM
A
MIN MAX MIN MAX
INCHES
4.80 5.00 0.189 0.197
MILLIMETERS
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.053 0.069
D 0.33 0.51 0.013 0.020
G 1.27 BSC 0.050 BSC
H 0.10 0.25 0.004 0.010
J 0.19 0.25 0.007 0.010
K 0.40 1.27 0.016 0.050
M 0 8 0 8
N 0.25 0.50 0.010 0.020
S 5.80 6.20 0.228 0.244
−X−
−Y−
G
M
Y
M
0.25 (0.010)
−Z−
Y
M
0.25 (0.010) Z
S
X
S
M
____
1.52
0.060
7.0
0.275
0.6
0.024
1.270
0.050
4.0
0.155
ǒ
mm
inches
Ǔ
SCALE 6:1
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
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Gate Drivers IGBT Gate Drivers High-Cur Stand-Alone
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