HCPL-3120 Datasheet, PDF (15/15 Pages) Agilent(Hewlett-Packard) – 2.0 Amp Output Current IGBT Gate Drive Optocoupler

maximum and minimum propaga-
tion delay difference specifica-
tions as shown in Figure 35. The
maximum dead time for the
HCPL-3120 is 700 ns (= 350 ns -
(-350 ns)) over an operating
temperature range of -40°C to
100°C.
Note that the propagation delays
used to calculate PDD and dead
time are taken at equal tempera-
tures and test conditions since
the optocouplers under consider-
ation are typically mounted in
close proximity to each other and
are switching identical IGBTs.
I_LED1
V_OUT1
V_OUT2
Q1 ON
Q2 OFF
Q1 OFF
Q2 ON
I_LED2
t_{PHL MAX}
t_{PLH MIN}
PDD* MAX = (t_PHL- t_PLH)_MAX = t_{PHL MAX} - t_{PLH MIN}
*PDD = PROPAGATION DELAY DIFFERENCE
NOTE: FOR PDD CALCULATIONS THE PROPAGATION DELAYS
ARE TAKEN AT THE SAME TEMPERATURE AND TEST CONDITIONS.
Figure 34. Minimum LED Skew for Zero Dead Time.
14
12
(12.3, 10.8)
10
(10.7, 9.2)
8
6
4
2
0
(10.7, 0.1)
(12.3, 0.1)
0
5
10
15
20
(V_CC - V_EE ) – SUPPLY VOLTAGE – V
Figure 36. Under Voltage Lock Out.
I_LED1
V_OUT1
V_OUT2
Q1 ON
Q2 OFF
Q1 OFF
Q2 ON
I_LED2
t_{PHL MIN}
t_{PHL MAX}
(t_PHL-t_PLH) _MAX
t_PLH
MIN
t_{PLH MAX}
PDD* MAX
MAXIMUM DEAD TIME
(DUE TO OPTOCOUPLER)
= (t_{PHL MAX} - t_{PHL MIN}) + (t_{PLH MAX} - t_{PLH MIN})
= (t_{PHL MAX} - t_{PLH MIN}) – (t_{PHL MIN} - t_{PLH MAX})
= PDD* MAX – PDD* MIN
*PDD = PROPAGATION DELAY DIFFERENCE
NOTE: FOR DEAD TIME AND PDD CALCULATIONS ALL PROPAGATION
DELAYS ARE TAKEN AT THE SAME TEMPERATURE AND TEST CONDITIONS.
Figure 35. Waveforms for Dead Time.
800
700
P_S (mW)
I_S (mA)
600
500
400
300
200
100
0
0 25 50 75 100 125 150 175 200
T_S – CASE TEMPERATURE – °C
Figure 37. Thermal Derating Curve,
Dependence of Safety Limiting Value
with Case Temperature per VDE 0884.
1-196