Avago Technologies ACPL-P340-000E User Manual
Page 3
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Data subject to change. Copyright © 2005-2011 Avago Technologies. All rights reserved.
AV02-2927EN - April 20, 2011
Test Connection and Operation
The denotations or symbols used below refer to High Side,
the top gate driver (U1) operation. If operating in a half-
bridge topology, please refer to the bottom gate driver’s
(U2) denotations or symbols in schematic diagram, Figure 2.
ACPL-P343/W343 Input Side:
1.
LED input current:
ACPL-P343/W343 has a LED input
gate control. Split resistors network in the ratio of 1.5:1
are used to achieve high CMR response. At this ratio,
R1 will be 205
and R2 will be 137 . Connecting “TP_
ANODE_T” and “TP_CATHODE_T” to a 5 V input pulse
signal will drive a recommended LED current of about
10 mA.
ACPL-P343/W343 Output Side
1.
Output positive power supply:
Connect the +15 V of an
isolated DC power supply to “VCC_T” and the common
to “TP_E1_T” test points. “TP_E1_T” is connected to the
IGBT emitter.
2.
Output negative power supply (optional):
If only single
positive output power supply is required, short the
open connection J4. For negative output power supply,
connect the -15 V of the isolated DC power supply to
“TP_VEE_T” and the common to “TP_E1_T” test points.
Remove any short circuit connection on J4 and replace
J4 with appropriate bypass capacitors.
3.
Output positive bootstrap power supply (optional for Top,
High side only):
For single positive output power supply,
short the open connection J4. Connect the +15 V
power supply of the Bottom side, “VCC_B” to the Top
side “VCC_T”. To complete the bootstrap power supply,
solder appropriate bootstrap resistor “Rbs”, diode “Dbs”
and Capacitor “Cbs”.
4.
Gate resistors:
Solder appropriate R3 for IGBT gate
discharging and R4 for IGBT gate charging.
5.
Output:
Monitor the output or the gate of IGBT by
connecting an oscilloscope between “TP_OUT_T” to
“TP_E1_T”.