ACPL-W314-500E Avago Technologies US Inc., ACPL-W314-500E Datasheet - Page 13

• Manufacturer Part Number: ACPL-W314-500E
• Description: OPTOCOUPLER IGBT 0.4A 6-SOIC
• Manufacturer: Avago Technologies US Inc.

Specifications of ACPL-W314-500E

• Output Type: Push-Pull, Totem-Pole
• Package / Case: 6-SOP
• Voltage - Isolation: 3750Vrms
• Number Of Channels: 1, Unidirectional
• Current - Output / Channel: 600mA
• Propagation Delay High - Low @ If: 300ns @ 7mA
• Current - Dc Forward (if): 25mA
• Input Type: DC
• Mounting Type: Surface Mount
• Fall Time: 50 ns
• Rise Time: 50 ns
• Configuration: 1 Channel
• Isolation Voltage: 3750 Vrms
• Maximum Propagation Delay Time: 700 ns
• Maximum Forward Diode Voltage: 1.8 V
• Minimum Forward Diode Voltage: 1.2 V
• Maximum Reverse Diode Voltage: 5 V
• Maximum Forward Diode Current: 12 mA
• Maximum Power Dissipation: 250 mW
• Maximum Operating Temperature: + 100 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 26. Minimum LED Skew for Zero Dead Time.
13
Figure 25. Recommended LED Drive Circuit for Ultra-High CMR Dead Time
and Propagation Delay Specifications.
Dead Time and Propagation Delay Specifications
The ACPL-P314/W314 includes a Propagation Delay Dif-
ference (PDD) specification intended to help designers
minimize “dead time” in their power inverter designs.
Dead time is the time high and low side power transistors
are off. Any overlap in Ql and Q2 conduction will result
in large currents flowing through the power devices
from the high voltage to the low-voltage motor rails.
To minimize dead time in a given design, the turn on of
LED2 should be delayed (relative to the turn off of LED1)
so that under worst-case conditions, transistor Q1 has
just turned off when transistor Q2 turns on, as shown in
Figure 26. The amount of delay necessary to achieve this
condition is equal to the maximum value of the propa-
gation delay difference specification, PDD max, which is
specified to be 500 ns over the operating temperature
range of -40° to 100°C.
*PDD = PROPAGATION DELAY DIFFERENCE
NOTE: FOR PDD CALCULATIONS THE PROPAGATION DELAYS
ARE TAKEN AT THE SAME TEMPERATURE AND TEST CONDITIONS.
V
V
I
I
OUT1
OUT2
LED1
LED2
+5 V
+5 V
1
1
2
2
3
3
C
C
C
C
LEDN
LEDN
LEDP
LEDP
PDD* MAX = (t
SHIELD
t
PHL MAX
Q2 OFF
Q1 ON
t
PLH MIN
PHL
- t
PLH
6
6
5
5
4
4
)
MAX
= t
Q1 OFF
Q2 ON
PHL MAX
- t
PLH MIN
*PDD = PROPAGATION DELAY DIFFERENCE
NOTE: FOR DEAD TIME AND PDD CALCULATIONS ALL PROPAGATION
DELAYS ARE TAKEN AT THE SAME TEMPERATURE AND TEST CONDITIONS.
Delaying the LED signal by the maximum propagation
delay difference ensures that the minimum dead time is
zero, but it does not tell a designer what the maximum
dead time will be. The maximum dead time is equivalent
to the difference between the maximum and minimum
propagation delay difference specification as shown in
Figure 27. The maximum dead time for the ACPL-P314/
W314 is 1 μs (= 0.5 μs - (-0.5 μs)) over the operating tem-
perature range of –40°C to 100°C.
Figure 27. Waveforms for Dead Time.
Note that the propagation delays used to calculate PDD
and dead time are taken at equal temperatures and test
conditions since the optocouplers under consideration
are typically mounted in close proximity to each other
and are switching identical IGBTs.
V
V
I
I
OUT1
OUT2
LED1
LED2
(t
PHL-
PDD* MAX
Q2 OFF
Q1 ON
t
t
PHL MIN
PHL MAX
t
PLH
)
MAX
MAXIMUM DEAD TIME
(DUE TO OPTOCOUPLER)
= (t
= (t
= PDD* MAX – PDD* MIN
PHL MAX
PHL MAX
t
MIN
PLH
t
PLH MAX
- t
- t
PHL MIN
PLH MIN
) + (t
) – (t
Q1 OFF
PLH MAX
PHL MIN
Q2 ON
- t
- t
PLH MAX
PLH MIN
)
)