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Document overview

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Technical content

Features

  • Programmable transient suppressor
  • Wide negative firing voltage range: VGn = - 175 V max.
  • Low dynamic switching voltages: VFP and VDGL
  • Low gate triggering current: IGT = 5 mA max.
  • Peak pulse current: –I PP = 100 A (10/1000 µs) –I PP = 150 A (5/310 µs) –I PP = 500 A (2/10 µs)
  • Holding current: IH = 150 mA min. Benefits
  • Trisil™ is not subject to ageing and provides a fail safe mode in short circuit for a better level of protection.
  • Trisils are used to ensure equipment meets various standards such as UL60950, IEC 60950 / CSA C22.2, UL1459, TIA-968-A (formerly FCC part 68)
  • Trisils have UL94 V0 approved resin (Trisils are UL497B approved [file: E136224]).

Description

This device has been especially designed to protect new high voltage, as well as classical SLICs, against transient overvoltages. Positive overvoltages are clamped by 2 diodes. Negative surges are suppressed by 2 thyristors, their breakdown voltage being referenced to -V BAT through the gate. LCP154DJF is specified to comply with ITU-T K20/21/45 and GR1089-Core when associated with Cooper Bussmann Telecom Circuit Protector fuse TCP 1.25 A. LCP154DJF is packaged in a PowerFLAT™ 5x6 to meet IEC/UL 60950 clearance requirements. Figure 1. Functional diagram

1 Characteristics

Table 1. Standards compliance

Figure 2. Electrical characteristics (definitions) Table 2. Absolute ratings (Tamb = 25 °C)

  1. The rated current values may be applied either to the RING to GND or to the Tip to GND terminal pairs.

the GND terminal current will be twice the rated current value of an individual terminal pair).

Figure 3. Pulse waveform Table 3. Parameters (Tamb = 25 °C unless otherwise specified)

  1. The oscillations with a time duration lower than 50 ns are not taken into account.

2 Technical information

Figure 4. Example of PCB layout based on LCP154DJF protection distance is used to comply with IEC/UL 60950 clearance requirements. The capacitor C is used to speed up the crowbar structure firing during the fast surge edges. during fast strikes. Note that this capacitor is generally present around the SLIC - Vbat pin. reference ground track (or plan). Figure 5. Protection of high voltage SLIC

Figure 6. Surge peak current versus duration F igure 7. Relative variation of holding current

3 Package information

  • Epoxy meets UL94, V0 In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark.

3.1 PowerFLAT™ 5x6 package information

Figure 8. PowerFLAT™ 5x6 package outline

Table 4. PowerFLAT™ 5x6 mechanical data

Figure 9. PowerFLAT™ 5x6 recommended footprint (all dimensions are in mm.)

Figure 10. Marking

4 Ordering information

5 Revision history

Table 5. Ordering information Table 6. Document revision history