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TISPPBL1D Datasheet(PDF) 12 Page - Power Innovations Ltd

Part # TISPPBL1D
Description  DUAL FORWARD-CONDUCTING P-GATE THYRISTORS FOR ERICSSON COMPONENTS SLICS?
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Manufacturer  POINN [Power Innovations Ltd]
Direct Link  http://www.bourns.com
Logo POINN - Power Innovations Ltd

TISPPBL1D Datasheet(HTML) 12 Page - Power Innovations Ltd

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TISPPBL1D, TISPPBL1P, TISPPBL2D, TISPPBL2P
DUAL FORWARD-CONDUCTING P-GATE THYRISTORS
FOR ERICSSON COMPONENTS SLICS
12
AUGUST 1997 - REVISED DECEMBER 1999
PRO D U C T
I N FO RMA T IO N
normal operation
Depending on the SLIC type, the maximum SLIC supply voltage rating (VBat) will be -70V, -80V or -85V. The
-90 V rating of the TISPPBLx gate-cathode (VGKRM) exceeds the highest SLIC voltage rating. To restore
normal operation after the TISPPBLx has switched on, the minimum switch-off current (holding current IH)
needed is equal to the maximum SLIC short circuit current to ground (d.c. line current together with the
maximum longitudinal current). The first page of this data sheet has a list of the appropriate TISPPBLx
protectors that can be used with each SLIC.
maximum TIPX and RINGX terminal ratings
The withstand levels of a SLIC line drive amplifier TIPX and RINGX can be expressed in terms of maximum
voltage for certain time periods. The negative voltage rating can be specified in two ways; relative to ground or
relative to the SLIC negative supply voltage (VBat).
The TIPX or RINGX voltage withstand levels for the current range of Ericsson SLICs falls into three groups,
see Figure 15. The first group, headed by the PBL 3762A/2 SLIC, has a positive polarity d.c. withstand of
+2 V. For 10 ms, the output can withstand a voltage of +5 V. For 1 µs, the output can withstand a voltage of
+10 V. For 250 ns, the output is able to withstand a voltage of +15 V.
In the negative polarity, the output can withstand VBat continuously. For 10 ms, the output can withstand a
voltage of VBat - 20 V. For 1 µs, the output can withstand a voltage of VBat - 40 V. For 250 ns, the output is able
to withstand a voltage of VBat -70 V.
The second group, headed by the PBL 3766 SLIC, has a positive polarity d.c. withstand of +0.5 V. For 10 ms,
1 µs and 250 ns the withstand voltage is the same as the PBL 3762A/2 group. In the negative polarity the
withstand voltage of the PBL 3766 group is the same as the PBL 3762A/2 group.
The third group, headed by the PBL 386 20/2 SLIC, has the same positive polarity withstand as the
PBL 3762A/2 group. In the negative polarity, the output can withstand -80 V continuously. For 10 ms, the
output can withstand a voltage of VBat - 10 V. For 1 µs, the output can withstand a voltage of VBat -25 V. For
250 ns, the output is able to withstand a voltage of VBat -35 V.
protection requirements to cover all SLICs
To protect all SLICs, the TISPPBLx protector must limit the voltage to the lowest withstand levels of the three
SLIC groups shown in Figure 15. Figure 16 shows that this will be the positive polarity rating of the PBL 3766
group and the negative rating of the PBL 386 20/2 group.
.
TISPPBLx voltage limiting performance
Figure 17 shows how the TISPPBLx protection voltages compare to the minimum voltage withstands of
Figure 16. The two shaded areas represent the positive and negative maximum limiting voltage levels of the
TISPPBLx from Figure 2. The isolation diode voltage drop displaces the TISPPBLx negative limiting voltage
1 µs, -20 V pulse area by -0.7 V from VBat. So the actual negative limiting voltage is -20.7 V relative to VBat.
This value does not exceed any part of the SLIC minimum negative voltage ratings. Any negative voltage
disturbance in the VB supply caused by TISPPBLx gate current will be tracked in VBat by conduction of the
isolation diode D1. So a negative going change in VB does not substantially increase the TIPX and RINGX
voltage stress relative to VBat. However, the absolute value of VBat with respect to ground must be kept within
the data sheet rating. In the positive polarity the TISPPBLx limits the maximum voltage to 8 V in a 1 µs period
and between 1 V and 5 V for a 10 ms period. These values do not exceed any of the SLIC minimum positive
voltage ratings.


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