Datasheet

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This is information on a product in full production.

November 2013 DocID16804 Rev 3 1/10

LCP1521S

Programmable transient voltage suppressor for SLIC protection

Datasheet - production data

Features

• Programmable transient suppressor

• Wide negative firing voltage range:

= -175 V max.

• Low dynamic switching voltages:

and V

DGL

• Low gate triggering current: I

= 5 mA max.

• Peak pulse current: I

= 30 A (10/1000 µs)

• Holding current: I

= 150 mA min.

Benefits

• A 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 950 /

CSA C22.2, UL1459 and FCC part 68.

• Trisils have UL94 V0 approved resin (Trisils

are UL497B approved [file: E136224]).

Description

These devices have 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.

These components present a very low gate

triggering current (I

) in order to reduce the

current consumption on printed circuit board

during the firing phase.

Figure 1. Functional diagram

TM: Trisil is a trademark of STMicroelectronics

SO-8

LCP1521S

TIP

RING

TIP

GND

RING

GND

www.st.com

Summary of content (10 pages)

PAGE 1
LCP1521S Programmable transient voltage suppressor for SLIC protection Datasheet - production data Description These devices have 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 -VBAT through the gate.
PAGE 2
Characteristics 1 LCP1521S Characteristics Table 1. Standards compliance Standard Peak surge voltage Voltage waveform Required peak current Current waveform Minimum serial resistor to meet standard ( Ω ) (A) (V) 2500 1000 2/10 µs 10/1000 µs 500 100 2/10 µs 10/1000 µs 12 24 5000 2/10 µs 500 2/10 µs 24 1500 2/10 µs 100 2/10 µs 0 ITU-T-K20/K21 6000 1500 10/700 µs 150 37.5 5/310 µs 110 0 ITU-T-K20 (IEC 61000-4-2) 8000 15000 1/60 ns IEC 61000-4-5 4000 4000 10/700 µs 1.
PAGE 3
LCP1521S Characteristics Table 3. Absolute ratings (Tamb = 25 °C) Symbol Value Unit 10/1000 µs 8/20 µs 10/560 µs 5/310 µs 10/160 µs 1/20 µs 2/10 µs 30 100 35 40 50 100 150 A ITSM t = 20 ms Non repetitive surge peak on-state current t = 200 ms (50 Hz sinusoidal) t=1s 18 10 7 A VGn Negative battery voltage range -175 V Tstg Tj Storage temperature range Operating junction temperature range -55 to +150 -40 to +150 °C TL Maximum lead temperature for soldering during 10 s.
PAGE 4
Characteristics LCP1521S Table 4. Parameters related to the diode LINE / GND (Tamb = 25 °C) Symbol Test conditions VF IF = 5 A VFP 10/700 µs 1.2/50 µs 2/10 µs 1.5 kV 1.5 kV 2.5 kV Max. Unit t = 500 µs 3 V RS = 10 Ω RS = 10 Ω RS = 62 Ω 5 9 30 V Table 5. Parameters related to the protection thyristors (Tamb = 25 °C) Symbol Test conditions Min. Max. Unit 5 mA IGT VLINE = -48 V 0.1 IH VGn = -48 V 150 VGT at IGT IRG VRG = -175 V VRG = -175 V mA 2.
PAGE 5
LCP1521S Technical information Figure 4. LCP concept behavior Rs1 L1 TIP GND -Vbat V Tip ID1 IG T1 Th1 D1 Gn GND C Rs2 VRing RING L2 Figure 4 shows the classical protection circuit using the LCP crowbar concept. This topology has been developed to protect the new high voltage SLICs. It allows to program the negative firing threshold while the positive clamping value is fixed at GND.
PAGE 6
Technical information LCP1521S The series resistors Rs1 and Rs2 designed in Figure 4 represent the fuse resistors or the PTC which are mandatory to withstand the power contact or the power induction tests imposed by the various country standards. Taking into account this fact the actual lightning surge current flowing through the LCP is equal to: I surge = V surge / (Rg + Rs) With: V surge = peak surge voltage imposed by the standard.
PAGE 7
LCP1521S 3 Package information Package information • Epoxy meets UL94, V0 • Lead-free packages 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. Figure 9.
PAGE 8
Package information LCP1521S Table 8. SO-8 dimension values Dimensions Ref. Millimeters Min. Typ. A Inches Max. Min. Typ. 1.75 0.069 A1 0.1 A2 1.25 b 0.28 0.48 0.011 0.019 C 0.17 0.23 0.007 0.009 D 4.80 4.90 5.00 0.189 0.193 0.197 E 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 e 0.25 0.004 0.010 0.049 1.27 0.050 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 L1 k° ccc 1.04 0.041 0 8 0 0.10 6.8 (0.268) 0.6 (0.
PAGE 9
LCP1521S 4 Ordering information Ordering information Table 9. Ordering information Order code Marking LCP1521S CP152S LCP1521SRL(1) Package Weight SO-8 0.078 g Base qty Delivery mode 100 Tube 2500 Tape and reel CP152S 1. Preferred device 5 Revision history Table 10. Document revision history Date Revision Changes 20-Nov-2009 1 First issue. 23-Feb-2012 2 Standardized nomenclature for Gn. 15-Nov-2013 3 Updated Figure 10.
PAGE 10
LCP1521S Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.