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 www.st.com 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 The STMicroelectronics corporate logo is a registered trademark of the STMicroelectronics group of companies 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