Datasheet

Application schematics and pin description TSC888
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1 Application schematics and pin description
The TSC888 high-side current-sense amplifier features a 2.8 V to 24 V input common-mode
range that is independent of supply voltage. The main advantage of this feature is to allow
high-side current sensing at voltages much greater than the supply voltage (V
CC
). The
TSC888 can therefore be supplied by a 5 Vsb line and monitor a 3.3 V, 5 V or 12 V power
line. Considering the wide supply voltage operating range (4 V to 24 V) another option
available in most cases is to connect the V
CC
pin to the V
p
pin.
Figure 1. Application schematics
Table 1 describes the function of each pin. Their position is shown in the illustration on the
cover page and in Figure 1 above.
Table 1. Pin description
Symbol Type Function
Out Analog output
The out voltage is proportional to the magnitude of the sense
voltage V
p
-V
m
.
Gnd Power supply Ground line.
Vcc Power supply Positive power supply line.
Vp Analog input
Connection for the external sense resistor. The measured current
enters the shunt on the V
p
side.
Vm Analog input
Connection for the external sense resistor. The measured current
exits the shunt on the V
m
side.
Monitoring
device
Gnd
Main
PWM
controller
Stand-by
PWM
controller
5Vsb
12V, 5V or 3.3V line
Vcc
Vp
V
sense
Vm
Out
TSC888
I
load
V
out
=V
sense
.A
v