Application information
3
Application information
THBT15011, THBT20011, THBT27011
Figure 8. Device connections
TIP 1
8 TIP
2
GND
3
7
GND
6
RING 4
5 RING
Connect pins 2, 3, 6 and 7 to ground to guarantee a good surge current capability for long
duration disturbances.
To take advantage of the “4-point” structure of the THBT, the TIP and RING lines have to
cross the device. In this case, the device will eliminate the overvoltages generated by the
parasitic inductances of the wiring (Ldi/dt), especially for very fast transients.
3.1
Application circuits
Figure 9. Line card protection
RING
GENERATOR
LINE A
T
E
S
T
R
E
L
A
Y
S
LINE B
PTC
THBTxxxD
PTC
RING
RELAY
- VBAT
LCP1511D
SLIC
220
nF
6/11
Doc ID 3767 Rev 9