IRS2336D International Rectifier Corp., IRS2336D Datasheet - Page 26

• Manufacturer Part Number: IRS2336D
• Description: High Voltage 3 Phase Gate Driver Ic
• Manufacturer: International Rectifier Corp.

Truth Table: Undervoltage lockout, ITRIP, and ENABLE
Table 4 provides the truth table for the IRS2336xD. The first line shows that the UVLO for V
FAULT output has gone low and the gate drive outputs have been disabled. V
when V
The second case shows that the UVLO for V
disabled. After V
(IRS2336D) or rising (IRS23364D) transition of HIN. The third case shows the normal operation of the HVIC. The
fourth case illustrates that the ITRIP trip threshold has been reached and that the gate drive outputs have been
disabled and a fault has been reported through the fault pin. In the last case, the HVIC has received a command
through the EN input to shutdown; as a result, the gate drive outputs have been disabled.
Advanced Input Filter
The advanced input filter allows an improvement in the input/output pulse symmetry of the HVIC and helps to reject
noise spikes and short pulses. This input filter has been applied to the HIN, LIN, and EN inputs. The working
principle of the new filter is shown in Figures 17 and 18.
Figure 17 shows a typical input filter and the asymmetry of the input and output. The upper pair of waveforms
(Example 1) show an input signal with a duration much longer then t
difference between the input signal and t
duration slightly longer then t
t
Figure 18 shows the advanced input filter and the symmetry between the input and output. The upper pair of
waveforms (Example 1) show an input signal with a duration much longer then t
FIL,IN
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.
Normal operation
Figure 15: Programming over-temperature
EN command
CC
ITRIP fault
UVLO V
UVLO V
is greater than V
CC
BS
BS
exceeds the V
V
X
V
V
protection
Table 4: IRS2336xD UVLO, ITRIP, EN, RCIN, & FAULT truth table
CC
SS
R
R
R
3
4
T
CCUV
< V
VCC
15 V
15 V
15 V
15 V
FIL,IN
CCUV
, the FAULT output returns to the high impedance state.
ITRIP
; the resulting output is approximately the difference between the input signal and
BSUV
< V
VBS
15 V
15 V
15 V
—
FIL,IN
BSUV
threshold , HO will stay low until the HVIC input receives a new falling
BS
. The lower pair of waveforms (Example 2) show an input signal with a
has been tripped and that the high-side gate drive outputs have been
>V
ITRIP
0 V
0 V
0 V
—
ITRIP
26
5 V
5 V
5 V
0 V
EN
—
Figure 16: Using over-current protection and over-
RCIN
High
High
High
High
Low
V
SS
FIL,IN
; the resulting output is approximately the
temperature protection
V
High impedance
High impedance
High impedance
CC
R
R
R
T
3
4
FAULT
IRS2336xD Family
CCUV
0
0
is not latched in this case and
D
R
2
FIL,IN
1
V
R
X
0
; the resulting output is
© 2008 International Rectifier
CC
D
1
R
2
has been tripped; the
LIN
LIN
LO
0
0
0
COM
ITRIP
HIN
HO
0
0
0
0