zxct1008 Zetex Semiconductors plc., zxct1008 Datasheet - Page 6

• Manufacturer Part Number: zxct1008
• Description: Zxct1008 - Automotive High-side Current Monitor
• Manufacturer: Zetex Semiconductors plc.

R (min)
Where R
motors, a charging battery or further circuitry that
requires monitoring, R
specific requirements of accuracy, size and power
rating.
An additional resistor, Rlim can be added in series
with Rout (figure 1.0), to limit the current from I
Any circuit connected to Vout will be protected from
input voltage transients. This can be of particular
use in automotive applications where load dump
and other common transients need to be
considered. The zener Z1 provides additional
protection for local dump, reverse battery and high
voltage transient incidents.
Assuming the worst case condition of V
providing a low impedance to a transient, the
minimum value of R
The maximum value of R
V
characteristic on page 3) of the ZXCT1009 :-
ZXCT1008
R
lim
out
lim
(max)
V
V
I
V
V
V
(max) and the dropout voltage (see transfer
pk
pk
max
in
dp
out
(min) = Minimum Supply Operating Voltage
= Dropout Voltage
= Peak output current = 40mA
(max) = Maximum Operating Output Voltage
=
load
= Peak transient voltage to be withstood
= Maximum working Voltage = 20V
=
V
R [V
pk
out
represents any load including DC
−
I
pk
V
in
max
(min) (
lim
V
sense
is given by:-
out
−
(max)
V
lim
dp
can be selected on
+
is set by V
V (max)
out
out
)]
in
(min),
= 0V;
out
.
6
TYPICAL AUTOMOTIVE CIRCUIT APPLICATION
Figure 1.0
ZXCT1009 with additional current limiting Resistor R
and zener Z1
ISSUE 4 - JULY 2007
lim