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參數(shù)資料
| 型號： | LCP02-150M |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | PROGRAMMABLE TRANSIENT VOLTAGE SUPPRESSOR FOR RINGING SLICS |
| 中文描述： | 可編程瞬態(tài)電壓抑制器的振鈴SLIC組件 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 64K |
| 代理商： | LCP02-150M |
LCP02-150M
6/9
Figure 5 shows the classical protection circuit using the LCP02-150M crowbar concept. This topology has
been developped to protect the new two-battery voltage SLICs. It allows both positive and negative firing
thresholds to be programmed. The LCP02-150M has two gates (Gn and Gp). Gn is biased to negative bat-
tery voltage -Vbat, while Gp is biased to the positive battery voltage +Vb.
When a negative surge occurs on one wire (L1 for example), a current Ign flows through the base of the
transistor T1 and then injects a current in the gate of the thyristor Th1 which fires. The entire surge current
flows through the ground. After the surge, when the current flowing through Th1 becomes less negative
than the negative holding current, Th1 switches off. This holding current I
H-
is temperature dependant as
per figure 2.
When a positive surge occurs on one wire (L1 for example), a current Igp flows through the base of the
transistor T2 and then injects a current in the gate of the thyristor Th2 which fires. The entire surge current
flows through the ground. After the surge, when the current flowing through Th2 becomes less positive
than the positive holding current Ih+, Th2 switches off. This holding current I
H+
is temperature dependant
and is equal to 30mA at 25°C.
The capacitors Cn and Cp are used to speed up the crowbar structure firing during the fast surge rise or
fallingedges.ThisallowstominimizethedynamicalbreakovervoltageattheSLICTipandRinginputsdur-
ing fast surges. Please note that these capacitors are generally available around the SLIC. To be efficient
they have to be as close as possible to the LCP02-150M gate pins (Gn and Gp) and to the reference
ground track (or plan). The optimized value for Cn and Cp is 220nF.
The series resistors Rs1 and Rs2 represent the fuse, fuse resistors or the PTCs which are needed to with-
stand the power contact or the power induction tests imposed by the country standards. Taking this factor
into account, the actual lightning surge current flowing through the LCP02-150M is equal to :
I surge = Vsurge / (Rg + Rs)
With
V surge = peak surge voltage imposed by the standard.
Rg = series resistor of the surge generator
Rs = series resistor of the line card (e.g. PTC)
The LCP02-150M topology is particularly optimized for the new telecom applications such as cable mo-
dem, fiber in the loop, WLL systems, and decentralized central office for example. Theschematicsoffigures
6 and 7 give the 2 most frequent topologies used for these emergent applications.
TECHNICAL INFORMATION
Cp
Gn
TIP
RING
Gp
GND
-Vbat
+Vb
Cn
Rs1
Rs2
L 1
L 2
GND
VTip
Th1
Th2
T1
T2
Ign
Igp
V Ring
Fig. 5:
LCP02 concept behavior.
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| LCP02-150M-TR | PROGRAMMABLE TRANSIENT VOLTAGE SUPPRESSOR FOR RINGING SLICS |
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| LD1117-12-S08-B-R | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
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| LCP02-150M-TR | 功能描述:TVS二極管陣列 Programmable TVS RoHS:否 制造商:Littelfuse 極性: 通道:4 Channels 擊穿電壓: 鉗位電壓:11.5 V 工作電壓:2.5 V 峰值浪涌電流:20 A 安裝風(fēng)格:SMD/SMT 端接類型:SMD/SMT 系列: 最小工作溫度:- 40 C 最大工作溫度:+ 85 C |
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| LC-P0612P | 功能描述:密封鉛酸電池 6V 12AH .187" TABS RoHS:否 制造商:CSB 輸出電壓:12 V 容量: 大小: 端接類型:Faston Tab |
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| LCP0G050M0R2R | 制造商:THINKING 制造商全稱:Thinking Electronic Industrial Co.,Ltd 功能描述:Ultra-Low Capacitance ESD Suppressor for High-Speed Application |
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