ACPL-333J-000E Avago Technologies US Inc., ACPL-333J-000E Datasheet - Page 21

• Manufacturer Part Number: ACPL-333J-000E
• Description: OPTOCOUPLER IGBT 2.5A 16-SOIC
• Manufacturer: Avago Technologies US Inc.

Specifications of ACPL-333J-000E

• Output Type: Gate Driver, Miller Clamp
• Package / Case: 16-SOIC (0.300", 7.50mm Width)
• Voltage - Isolation: 3750Vrms
• Number Of Channels: 2, Bi-Directional
• Current - Output / Channel: 1.5A
• Propagation Delay High - Low @ If: 180ns @ 10mA
• Current - Dc Forward (if): 12mA
• Input Type: DC
• Mounting Type: Surface Mount
• Fall Time: 50 ns
• Rise Time: 50 ns
• Configuration: 2 Channel
• Maximum Forward Diode Voltage: 1.95 V
• Minimum Forward Diode Voltage: 1.2 V
• Maximum Reverse Diode Voltage: 5 V
• Maximum Power Dissipation: 600 mW
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Under Voltage Lockout
The ACPL-333J Under Voltage Lockout (UVLO) feature is
designed to prevent the application of insufficient gate
voltage to the IGBT by forcing the ACPL-333J output
low during power-up. IGBTs typically require gate
voltages of 15 V to achieve their rated V
At gate voltages below 13 V typically, the V
increases dramatically, especially at higher currents.
At very low gate voltages (below 10 V), the IGBT may
operate in the linear region and quickly overheat.
The UVLO function causes the output to be clamped
whenever insufficient operating supply (V
Once V
threshold), the UVLO clamp is released to allow the
device output to turn on in response to input signals. As
V
first the DESAT protection circuitry becomes active. As
V
is released. Before the time the UVLO clamp is released,
the DESAT protection is already active. Therefore, the
UVLO and DESAT Fault detection feature work together
to provide seamless protection regardless of supply
voltage (V
Active Miller Clamp
A Miller clamp allows the control of the Miller current
during a high dV/dt situation and can eliminate the use
of a negative supply voltage in most of the applications.
During turn-off, the gate voltage is monitored and the
clamp output is activated when gate voltage goes below
2V (relative to V
for a Miller current up to 1100mA. The clamp is disabled
when the LED input is triggered again.
Other Recommended Components
The application circuit in Figure 36 includes an output
pull-down resistor, a DESAT pin protection resistor, a
FAULT pin capacitor, and a FAULT pin pullup resistor and
Active Miller Clamp connection.
Output Pull-Down Resistor
During the output high transition, the output voltage
rapidly rises to within 3 diode drops of V
current then drops to zero due to a capacitive load, the
output voltage will slowly rise from roughly V
to V
the output voltage to V
R
ed to sink a static current of several 650 μA while the
output is high. Pull-down resistor values are dependent
on the amount of positive supply and can be adjusted
according to the formula, R
650 μA.
21
CC2
CC2
PULL-DOWN
CC2
is further increased (above V
is increased from 0 V (at some level below V
CC2
within a period of several microseconds. To limit
CC2
between the output and V
exceeds V
).
EE
). The clamp voltage is V
UVLO+
CC2
-3(V
pull-down
(the positive-going UVLO
BE
UVLO+
), a pull-down resistor,
= [V
), the UVLO clamp
EE
CC2
is recommend-
CC2
CC2
CE(ON)
CE(ON)
. If the output
OL
-3 * (V
) is applied.
+2.5V typ
CC2
voltage.
voltage
UVLO+
-3(V
BE
)] /
BE
),
)
Figure 38. Output pull-down resistor.
DESAT Pin Protection Resistor
The freewheeling of flyback diodes connected across
the IGBTs can have large instantaneous forward voltage
transients which greatly exceed the nominal forward
voltage of the diode. This may result in a large negative
voltage spike on the DESAT pin which will draw substan-
tial current out of the driver if protection is not used. To
limit this current to levels that will not damage the driver
IC, a 100 ohm resistor should be inserted in series with
the DESAT diode. The added resistance will not alter the
DESAT threshold or the DESAT blanking time.
Figure 39. DESAT pin protection.
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
1
2
3
4
5
6
7
8
V
V
V
V
FAULT
FAULT
V
V
CATHODE
CATHODE
ANODE
ANODE
ANODE
ANODE
CATHODE
CATHODE
V
V
FAULT
V
CATHODE
ANODE
ANODE
CATHODE
S
S
CC1
CC1
S
S
S
CC1
S
DESAT
DESAT
DESAT
V
V
V
CLAMP
CLAMP
CLAMP
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
OUT
OUT
OUT
LED
LED
CC2
CC2
LED
CC2
V
V
V
EE
EE
EE
EE
EE
EE
E
E
E
16
16
15
15
14
14
13
13
12
12
11
11
10
10
16
15
14
13
12
11
10
9
9
9
V
V
V
100pF
CC
CC
CC
100 Ω
R
G
R
R
PULL-DOWN
PULL-DOWN
R
R
D
G
G
DESAT