TSC1031 STMicroelectronics, TSC1031 Datasheet - Page 20

• Manufacturer Part Number: TSC1031
• Description: High-voltage high side current sense amplifier
• Manufacturer: STMicroelectronics

Specifications of TSC1031

• Wide Common-mode Operating Range: 2.9 to 70 V in single-supply configuration -2.1 to 65 V in dual-supply configuration
• Wide Common-mode Surviving Range: -16 to 75 V (reversed battery and load-dump conditions)
• Supply Voltage Range: 2.7 to 5.5 V in single supply configuration
• Low Current Consumption: ICCmax = 360 μA
• Pin Selectable Gain: 50 V/V or 100 V/V

Application information
20/26
The current multiplier gain K2 can be set to 2.5 or 5 depending on the voltage applied on the
SEL pin.
Since they define the full-scale output range of the application, the R
amplification gain Av are important parameters and must therefore be selected carefully.
The TSC1031’s dedicated schematic eases the implementation of EMI filtering in harsh
environments. A simple filter is described in
by R
The values of R
amplifier inputs. The value of the C
frequency of the first-order low-pass filter provides enough attenuation to the high frequency
interferences.
To balance the contribution of R
resistor R
chosen according to the following formula.
If these precautions having been taken, the TSC1031’s gain is unaffected by the
implementation of the input filtering resistors.
f1
K1 = 10 = R
, R
f2
f3
and C
should be connected between pin A1 and Gnd. The value of R
f1
g3
f
.
and R
/R
g1
= R
f2
should be equal so as to balance the contribution on both
f3
/R
Doc ID 16875 Rev 2
f1
f1
= R
and R
f
capacitor should be selected so that the cut-off
f3
/R
f2
f2
in the current sense amplifier gain, an output
Figure
22, where the input filtering is performed
sense
f3
resistor and the
should be
TSC1031