THBTXXX11D Datasheet, PDF (4/9 Pages) STMicroelectronics – TRIPOLAR OVERVOLTAGE PROTECTION FOR TELECOM LINE

THBTxxx11D
TEST CIRCUIT 1 for I_BO and V_BO parameters :
Auto
Transformer
220V/2A
tp = 20ms
R1
static
140
relay.
R2
240
Vout
K
IBO
measure
D.U.T
VBO
measure
Transformer
220V/800V
5A
TEST PROCEDURE :
n Pulse Test duration (tp = 20ms):
- For Bidirectional devices = Switch K is closed
- For Unidirectional devices = Switch K is open.
n V_OUT Selection
- Device with V_BO < 200 Volt
- V_OUT = 250 V_RMS, R₁ = 140 Ω.
- Device with V_BO  200 Volt
- V_OUT = 480 V_RMS, R₂ = 240 Ω.
TEST CIRCUIT 2 for I_H parameter.
R
V_BAT = - 48 V
D.U.T.
- V_P
Surge generator
This is a GO-NOGO test which allows to confirm the holding current (I_H) level in a functional
test circuit.
TEST PROCEDURE :
n 1) Adjust the current level at the I_H value by short circuiting the AK of the D.U.T.
2) Fire the D.U.T with a surge Current : Ipp = 10A , 10/1000 µs.
3) The D.U.T will come back off-state within 50 ms max.
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