tisp4a270h3bj Bourns, Inc., tisp4a270h3bj Datasheet - Page 7

• Manufacturer Part Number: tisp4a270h3bj
• Description: Lcas R Line Protector
• Manufacturer: Bourns, Inc.

Figure 8 and the following text summarizes the derivation process for the TISP4A270H3BJ voltages. Details of the full process and other
design aspects are covered by the document entitled TISP4A270H3BJ - Optimized ‘758x LCAS Overvoltage Protection.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
APRIL 2002 - REVISED FEBRUARY 2005
Calculation of the TISP4A270H3BJ Voltage Values
TISP4A270H3BJ LCAS R
A
B
C
D
E
Calculation of R
Maximum T
Maximum protector V
Minimum protector V
V
Maximum SW1, SW2,
voltage ratings set by
SW1, SW2 and SW3
DRM
voltage parameters
SW3 and Isolation
Protector V
voltages at T
R
V
at 25 °C and T
LINE
T
T
(BO)
A
A
T
= 25 °C
= 25 °C
protector
@ 25 °C
AMIN
at
at
LINE
Figure 8. Derivation of TI SP4A270H3BJ V
LINE
DRM
and R
AMIN
protector
at
LINE
AMIN
APPLICATIONS INFORMATION
LINE
DRM
(BO)
Protector
Maximum T
V
T
and impulse protection
RINGING
DRM
Maximum power fault
SW1, SW2 and SW3,
specific V
V
25 °C V
voltage increase of
(BO)
data and T
versus temperature
System T
/V
bias voltages on
DRM
0, V
(BO)
BAT
(BO)
factor for
bat
= 1.15 x
(BO)
, R
AMIN
voltage
AMIN
BAT
and V
and
AI4CITRAMA
DRM