HCPL-3140#060 Avago Technologies US Inc., HCPL-3140#060 Datasheet - Page 12

• Manufacturer Part Number: HCPL-3140#060
• Description: OPTOCOUPLER 1CH 0.4A VDE 8-DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of HCPL-3140#060

• Package / Case: 8-DIP (0.300", 7.62mm)
• Voltage - Isolation: 3750Vrms
• Number Of Channels: 1, Unidirectional
• Current - Output / Channel: 600mA
• Propagation Delay High - Low @ If: 300ns @ 8mA
• Current - Dc Forward (if): 25mA
• Input Type: DC
• Output Type: Push-Pull, Totem-Pole
• Mounting Type: Through Hole
• Isolation Voltage: 3750 Vrms
• Maximum Fall Time: 50 ns
• Maximum Forward Diode Current: 25 mA
• Maximum Rise Time: 50 ns
• Minimum Forward Diode Voltage: 1.2 V
• Output Device: Logic Gate Photo IC
• Configuration: 1 Channel
• Maximum Forward Diode Voltage: 1.8 V
• Maximum Reverse Diode Voltage: 5 V
• Maximum Power Dissipation: 250 mW
• Maximum Operating Temperature: + 100 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Selecting the Gate Resistor (Rg)
Step 1: Calculate R
and Rg in Figure 19 can be analyzed as a simple RC circuit with a
voltage supplied by the HCPL-3140/HCPL-0314.
The V
current of 0.6A. (See Figure 6).
Step 2: Check the HCPL-3140/HCPL-0314 power dissipation and
increase Rg if necessary. The HCPL-3140/HCPL-0314 total power
dissipation (P
output power (P
P
P
P
= (I
where K
constant of 0.001 mA/(nC*kHz). For the circuit in Figure 19 with I
(worst case) = 10 mA, Rg = 32
Qg = 100 nC, f = 20 kHz and T
P
P
0.4 J 20 kHz = 128 mW
< 250 mW (P
The value of 3 mA for I
entire operating temperature range.
Since P
power dissipation.
12
T
E
O
E
O
= P
= 10 mA
= I
= P
= (3 mA + (0.001 mA/(nC
CCBIAS
OL
F
E
O(BIAS)
O
ICC
value of 5 V in the previous equation is the V
+ P
for this case is less than P
V
+ K
F
O
T
Qg f is the increase in I
O(MAX)
) is equal to the sum of the emitter power (P
1.8 V
Duty Cycle
+ P
ICC
O
).
g
O(SWITCHING)
Rg
minimum from the I
Qg f) V
@ 85 C)
=
= 32
0.8 = 14 mW
CC
24 V – 5 V
V
in the previous equation is the max. I
I
CC
OLPEAK
0.6A
– V
CC
AMAX
= I
kHz))
, Max Duty Cycle = 80%,
OL
+ E
O(MAX)
CC
= 85 C:
CC
SW
OL
V
20 kHz
due to switching and K
, Rg = 32
(Rg,Qg) f
CC
peak specification. The IGBT
+ E
SW
100 nC)
OL
(Rg,Qg) f
is alright for the
at the peak
E
) and the
24 V +
CC
ICC
over
F
is a
L
Ultra High CMR Performance
Without a detector shield, the
dominant cause of optocoupler
CMR failure is capacitive
coupling from the input side of
the optocoupler, through the
package, to the detector IC
as shown in Figure 21. The
HCPL-3140/HCPL-0314 improves
CMR performance by using a
detector IC with an optically
transparent Faraday shield, which
diverts the capacitively coupled
current away from the sensitive
IC circuitry. However, this shield
does not eliminate the capacitive
coupling between the LED and
opto-coupler pins 5-8 as shown in
Figure 22. This capacitive
coupling causes perturbations in
the LED current during common
mode transients and becomes the
major source of CMR failures for
a shielded optocoupler. The main
design objective of a high CMR
LED drive circuit becomes
keeping the LED in the proper
state (on or off ) during common
mode transients. For example,
the recommended application
circuit (Figure 19), can achieve
10 kV/ s CMR while minimizing
component complexity.
Techniques to keep the LED in
the proper state are discussed in
the next two sections.
Figure 20. Energy dissipated in the
HCPL-0314 and for each IGBT switching
cycle.
ED Drive Circuit Considerations for
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
Rg – GATE RESISTANCE –
20
40
60
Qg = 50 nC
Qg = 100 nC
Qg = 200 nC
Qg = 400 nC
80
100