IRS2336 Datasheet, PDF (26/47 Pages) International Rectifier – HIGH VOLTAGE 3 PHASE GATE DRIVER IC

IRS2336x(D) Family
Figure 15: Programming over-temperature protection Figure 16: Using over-current protection and over-
temperature protection
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_CC has been tripped; the
FAULT output has gone low and the gate drive outputs have been disabled. V_CCUV is not latched in this case and
when V_CC is greater than V_CCUV, the FAULT output returns to the high impedance state.
The second case shows that the UVLO for V_BS has been tripped and that the high-side gate drive outputs have been
disabled. After V_BS exceeds the V_BSUV threshold, HO will stay low until the HVIC input receives a new falling
(IRS2336(D)) 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.
VCC
VBS ITRIP EN RCIN
FAULT
LO
HO
UVLO V_CC
<V_CCUV
—
—
— High
0
0
0
UVLO V_BS
15 V
<V_BSUV
0V
5 V High High impedance
LIN
0
Normal operation 15 V
15 V
0 V 5 V High High impedance LIN
HIN
ITRIP fault
15 V
15 V
>V_ITRIP 5 V Low
0
0
0
EN command
15 V
15 V
0 V 0 V High High impedance
0
0
Table 4: IRS2336xD UVLO, ITRIP, EN, RCIN, & FAULT truth table
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_FIL,IN; the resulting output is approximately the
difference between the input signal and t_FIL,IN. The lower pair of waveforms (Example 2) show an input signal with a
duration slightly longer then t_FIL,IN; the resulting output is approximately the difference between the input signal and
t_FIL,IN.
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; the resulting output is
approximately the same duration as the input signal. The lower pair of waveforms (Example 2) show an input signal
with a duration slightly longer then t_FIL,IN; the resulting output is approximately the same duration as the input signal.
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