fltsc100115

TSC10 series
High-side current sense
amplifiers
STMicroelectronics’ has introduced a family of high-side current sensing
amplifiers.
The TSC10 series measures a
small differential voltage on
a high-side shunt resistor and
translates it into a groundreferenced output voltage using
an internally-fixed gain.
Current sense amplifiers are
available in compact, tiny
packages and offer a wide
input common-mode voltage
range. Thanks to low quiescent
current, they can be used in
a wide variety of applications,
ranging from battery chargers to
automotive current monitoring.
Family key features:
Main applications:
• Independent supply and input common-
• Battery chargers
mode voltages
• Wide common-mode operating range:
-2.8 to 70 V • Wide common-mode survival range:
-32 to 75 V (load-dump)
• Wide supply voltage range: 2.7 to 24 V
• Low current consumption: ICC max
< 450 µA
• Internally fixed gain: 20 V/V, 50 V/V or
100 V/V
• Buffered output
• Automotive current monitoring
• Notebook computers
• Photovoltaic systems
• DC motor control
• Precision current sources
• Uninterruptible power supplies
• High-end power supplies
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The TSC10 series measures very small differences in voltage across a high-side shunt resistor and, using an internally fixed gain, amplifies the
difference into a ground-referenced output voltage. Gains are internally fixed (20 V/V, 50 V/V or 100 V/V) depending on the sensitivity required in
the application.
Devices use independent input common-mode and power supply voltages. Common-mode voltages can range from 2.8 up to 70 V in absolute
maximum ratings.
Quiescent current consumption is very low (< 450 µA), ensuring that the device can operate in battery-operated applications with minimal
power consumption. A wide supply voltage range for TSC101, from 4 to 24 V, allows the device to connect the power supply to either side of the
current measurement shunt with minimal error in most applications.
The TSC10 series is automotive grade (AECQ100). Devices can sustain load dump voltages up to 75 V.
APPLICATION EXAMPLE
VBulk
Input
Common
voltage can
go above Vcc
Vcc = 5 V
rs
VLoad
IL
IL
Vsense
Vcc = 5 V
V+
V-
System
VBulk
Vicm
Out
Vout
2.8 V
Vout = Av*Vsense
0V
GND
• Ideal when it is not possible to cut the ground path (as with certain automotive applications)
• TSC series can have a 5 V supply and nevertheless supervise common voltages up to 75 V
• No need for external resistor as the gain is fixed internally
• High level of accuracy compared with traditional devices
• Power consumption less than 450 µA (drawn from low VCC voltage) reduces overall system power dissipation
TSC SERIES
Part number
VICM (V)
VCC (V)
ICC (µA)
Temperature
range (°C)
Precision with
50 mV VSENSE
(%)
Package
TSC101
2.8 to 30
4 to 24
300
2.5
SOT23-5
TSC102
2.8 to 30
3.5 to 5.5
420
2.5
TSSOP8/SO8
TSC1021
2.8 to 30
3.5 to 5.5
300
1.5
TSSOP8/SO8
TSC103
2.9 to 70
2.7 to 5.5
360
2.5
TSSOP8/SO8
TSC1031
-2.1 to 65
to 5.5
360
2.5
TSSOP8/SO8
-40 to 125
Automotive
grade
Yes
© STMicroelectronics - January 2015 - Printed in United Kingdom - All rights reserved
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All other names are the property of their respective owners
Order code: FLTSC100115
For more information on ST products and solutions, visit www.st.com