TSC103 Datasheet, PDF (1/23 Pages) STMicroelectronics – High-voltage, high-side current sense amplifier

TSC103
High-voltage, high-side current sense amplifier
Features
■ Independent supply and input common-mode
voltages
■ 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: I_CC 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
■ Photovoltaic 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.
TSSOP8
(Plastic package)
SO-8
(Plastic package)
Vm 1
SEL1 2
SEL2 3
Out 4
Pin connections
(top view)
8 Vp
7 Vcc-
6 Gnd
5 Vcc+
The input common-mode and power-supply
voltages are independent. The common-mode
voltage can range from 2.9 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 2010
Doc ID 16873 Rev 1
1/23
www.st.com
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