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PDF TSC103 Data sheet ( Hoja de datos )
| Número de pieza | TSC103 | |
| Descripción | high-side current sense amplifier | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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TSC103
High-voltage, high-side current sense amplifier
TSSOP8
(Plastic package)
SO8
(Plastic package)
Vm 1
SEL1 2
SEL2 3
Out 4
Pin connections
(top view)
8 Vp
7 Vcc-
6 Gnd
5 Vcc+
Features
• Independent supply and input common-mode
voltages
• Wide common-mode operating range:
2.9 V to 70 V in single-supply configuration,
-2.1 V to 65 V in dual-supply configuration
• Wide common-mode surviving range:
-16 V to 75 V (reversed battery and load-dump
conditions)
Datasheet - production data
• Supply voltage range:
2.7 to 5.5 V in single-supply configuration
• Low current consumption: ICC max = 360 µA
• Pin selectable gain: 20 V/V, 25 V/V, 50 V/V or
100 V/V
• Buffered output
Applications
• Automotive current monitoring
• DC motor control
• Photo-voltaic systems
• Battery chargers
• Precision current sources
• Current monitoring of notebook computers
• Uninterruptible power supplies
• High-end power supplies
Description
The TSC103 measures a small differential voltage
on a high-side shunt resistor and translates it into
a ground-referenced output voltage. The gain is
adjustable to four different values from 20 V/V up
to 100 V/V by two selection pins.
Wide input common-mode voltage range, low
quiescent current, and tiny TSSOP8 packaging
enable use in a wide variety of applications.
The input common-mode and power-supply
voltages are independent. The common-mode
voltage can range from 2.9 V to 70 V in the single-
supply configuration or be offset by an adjustable
voltage supplied on the Vcc- pin in the dual-
supply configuration.
With a current consumption lower than 360 µA
and a virtually null input leakage current in
standby mode, the power consumption in the
applications is minimized.
January 2014
This is information on a product in full production.
DocID16873 Rev 3
1/25
www.st.com
1 page  
TSC103
Application schematic and pin description
Table 1 describes the function of each pin. Their position is shown in the illustration on the
cover page and in Figure 1 on page 3.
Symbol
Out
Gnd
Vcc+
Vcc-
Vp
Vm
SEL1
SEL2
Table 1. Pin description
Type
Function
Analog output
The Out voltage is proportional to the magnitude of the sense
voltage Vp-Vm.
Ground line
Power supply Positive power supply line.
Negative power supply line.
Analog input
Connection for the external sense resistor. The measured current
enters the shunt on the Vp side.
Connection for the external sense resistor. The measured current
exits the shunt on the Vm side.
Digital input Gain-select pin
DocID16873 Rev 3
5/25
25
5 Page 
TSC103
Electrical characteristics curves: current sense amplifier
Figure 8. Vp pin input current vs. Vsense
40
35
30
25
20
15
10
5
0
-100
T = 25°C
T = -40 °C
T = 125 °C
-50 0
Vsense (mV)
50
100
Figure 9. Vn pin input current vs. Vsense
20
18 T = 25°C
16 T = -40 °C
14
12
10
8
6 T = 125 °C
4
2
0
-100
-50
0
Vsense (mV)
50
100
Figure 10. Output stage low-state saturation
voltage vs. output current (Vsense = -1 V)
Figure 11. Output stage high-state saturation
voltage vs. output current (Vsense = +1 V)
1200
1000
Output stage
sinking current
800
T = 125 °C
600
400
200
0
0
T = 25 °C
T = -40 °C
246
Iout (mA)
8
10
1200
1000
T = 125 °C
Output stage
sourcing current
800
600
400 T = -40 °C
T = 25 °C
200
0
-10
-8 -6 -4
Iout (mA)
-2
0
Figure 12. Output stage load regulation
1 T = -40°C
0
-1 T = 125°C
-2
T = 25°C
-3
-4
-5 Output stage
sourcing current
-6
-10 -5
0
Iout (mA)
Output stage
sinking current
5 10
Figure 13. Step response
Vsense
Vout
Time base 4µs/div
Vsense 50mV/div
Vout 500mV/div
DocID16873 Rev 3
11/25
25
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet TSC103.PDF ] | |
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