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TSC888AILT Datasheet(PDF) 2 Page - STMicroelectronics

Part # TSC888AILT
Description  Low cost high-side current sense amplifier
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TSC888AILT Datasheet(HTML) 2 Page - STMicroelectronics

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Application schematics and pin description
TSC888
2/7
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 (VCC). 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 VCC pin to the Vp 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 Vp-Vm.
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 Vp side.
Vm
Analog input
Connection for the external sense resistor. The measured current
exits the shunt on the Vm side.
Monitoring
device
Gnd
Main
PWM
controller
Stand-by
PWM
controller
5Vsb
12V, 5V or 3.3V line
Vcc
Vp
Vsense
Vm
Out
TSC888
Iload
Vout=Vsense.Av


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