ACPL-W341-500E Avago Technologies US Inc., ACPL-W341-500E Datasheet - Page 19

• Manufacturer Part Number: ACPL-W341-500E
• Description: Gate Drive Optocoupler, T/R+LF
• Manufacturer: Avago Technologies US Inc.

Specifications of ACPL-W341-500E

• No. Of Channels: 1
• Optocoupler Output Type: Gate Drive
• Input Current: 16mA
• Opto Case Style: SOIC
• No. Of Pins: 6
• Leaded Process Compatible: Yes
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Details

LED Current Input with Hysteresis
The detector has optical receiver input stage with built in
Schmitt trigger to provide logic compatible waveforms,
eliminating the need for additional wave shaping. The
hysteresis (Figure 6) provides diff erential mode noise
immunity and minimizes the potential for output signal
chatter.
Under Voltage Lockout
The ACPL-P341/W341 Under Voltage Lockout (UVLO)
feature is designed to prevent the application of insuffi -
cient gate voltage to the IGBT by forcing the ACPL-P341/
W341 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 in-
suffi cient operating supply (V
exceeds V
UVLO clamp is released to allow the device output to turn
on in response to input signals.
Thermal Model for ACPL-P341/W341 Stretched SO6
Package Optocoupler
Defi nitions:
R
to heating of LED
R
to heating of Detector (Output IC)
R
(Output IC) due to heating of LED.
R
(Output IC) due to heating of Detector (Output IC).
P
P
T
T
Ta:
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Data subject to change. Copyright © 2005-2011 Avago Technologies. All rights reserved.
AV02-2929EN - June 2, 2011
1
2
11
12
21
22
1
2
:
:
:
:
Junction temperature of LED (°C).
:
:
:
:
Junction temperature of Detector (°C).
Power dissipation of LED (W).
Power dissipation of Detector / Output IC (W).
Ambient temperature.
Junction to Ambient Thermal Resistance of Detector
Junction to Ambient Thermal Resistance of Detector
Junction to Ambient Thermal Resistance of LED due
Junction to Ambient Thermal Resistance of LED due
UVLO+
(the positive-going UVLO threshold), the
CC
) is applied. Once V
CE(ON)
CE(ON)
voltage.
voltage
CC
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Ambient Temperature:
sistances were measured approximately 1.25 cm above
optocoupler at ~23° C in still air
This thermal model assumes that an 6-pin single-channel
plastic package optocoupler is soldered into a 7.62 cm x
7.62 cm printed circuit board (PCB) per JEDEC standards.
The temperature at the LED and Detector junctions of
the optocoupler can be calculated using the equations
below.
T
T
Using the given thermal resistances and thermal model
formula in this datasheet, we can calculate the junction
temperature for both LED and the output detector. Both
junction temperature should be within the absolute
maximum rating.
For example, given P
LED junction temperature,
T
= (135 * 0.025 + 27 * 0.173) + 85
= 93° C
Output IC junction temperature,
T
= (39 *0.025 + 47 * 0.173) + 85
= 94° C
T
layout and part placement.
Related Application Noted
ThAN5336 – Gate Drive Optocoupler Basic Design for IGBT/
MOSFET
AN1043 – Common-Mode Noise: Sources and Solutions
AV02-0310EN – Plastics Optocouplers Product ESD and
Moisture Sensitivity
1
2
1
2
1
Thermal Resistance
= (R
= (R
= (R
= (R
and T
11
21
11
21
2
R
R
R
R
* P
* P
* P
* P
11
12
21
22
should be limited to 125° C based on the board
1
1
1
1
+ R
+ R
+ R
+ R
12
22
12
22
* P
* P
* P
* P
1
2
2
2
2
= 25 mW, P
Junction to Ambient Thermal Re-
°C/W
135
) +
) +
) +
) +
27
39
47
Ta
Ta
Ta
Ta
2
= 173 mW, Ta = 85° C:
(1)
(2)