HCPL-4504 Datasheet, PDF (15/16 Pages) Agilent(Hewlett-Packard) – High CMR, High Speed Optocouplers

HCPL-4504 OPTION 060
800
P_S (mW)
700
I_S (mA)
600
500
400
300
(230)
200
100
0
0 25 50 75 100 125 150 175 200
T_S – CASE TEMPERATURE – °C
1000
900
800
HCNW4504
P_S (mW)
I_S (mA)
700
600
500
400
300
200
100
0
0 25 50 75 100 125 150 175
T_S – CASE TEMPERATURE – °C
Figure 15. Thermal Derating Curve,
Dependence of Safety Limiting Valve
with Case Temperature per VDE 0884.
Power Inverter Dead
Time and Propagation
Delay Specifications
The HCPL-4504/0454 and
HCNW4504 include a specifica-
tion intended to help designers
minimize “dead time” in their
power inverter designs. The new
“propagation delay difference”
specification (t_PLH - t_PHL) is useful
for determining not only how
much optocoupler switching delay
is needed to prevent “shoot-
through” current, but also for
determining the best achievable
worst-case dead time for a given
design.
When inverter power transistors
switch (Q1 and Q2 in Figure 17),
it is essential that they never
LED 1
LED 2
HCPL-4504/0454
HCNW4504
8
2
7
6
3
5
+
OUT 1
BASE/GATE
DRIVE CIRCUIT
+HV
Q1
+
HCPL-4504/0454
HCNW4504
8
2
7
3
6
BASE/GATE
OUT 2
DRIVE CIRCUIT
Q2
5
–HV
Figure 16. Typical Power Inverter.
LED 1
OUT 1
LED 2
t_{PLH min}
(t_{PLH max}–t_{PLH min})
t_{PLH max}
TURN-ON DELAY
(t_{PLH max}–t_{PLH min})
OUT 2
t_{PHL min}
(t_{PHL max}–t_{PHL min})
t_{PHL max}
MAXIMUM DEAD TIME
Figure 17. LED Delay and Dead Time Diagram.
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