TSC888 Datasheet | STMicroelectronics

Features - - - - - - Independent supply and input mon-mode voltages Wide mon-mode operating range: 2.8 V to 24 V Wide supply voltage range: 4 to 24 V Low current consumption: ICC max = 1 m A Internally fixed gain: 20 V/V, 50 V/V or 100 V/V Buffered output Pin connections (top view) L SOT23-5 (Plastic package) Applications - - - - - Desktop puters and servers SMPS Photovoltaic/solar systems Battery chargers Notebook puters DC motor control Gnd 2 Vp 3 4 Vm Out 1 5 Vcc Description The TSC888 measures a small differential voltage on a high-side shunt resistor and translates it into a ground-referenced output voltage. The gain is internally fixed. Wide input mon-mode voltage range, low quiescent current, and tiny SOT23-5 packaging make the TSC888 ideal for use in a wide variety of applications. Input mon-mode and power supply voltages are independent. mon-mode voltage can range from 2.8 V to 24 V in operating conditions. Current consumption lower than 1 m A and wide supply voltage range allow to connect the power supply to either side of the current measurement shunt with minimal error. June 2008 Rev 1 1/7 .st. 7 Free Datasheet http://..net/ Application schematics and pin description Application schematics and pin description The TSC888 high-side current-sense amplifier features a 2.8 V to 24 V input mon-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 Vsense Iload 12V, 5V or 3.3V line Main PWM controller 5Vsb Vp Vm TSC888 Vcc Out Monitoring device Stand-by PWM controller Gnd Vout=Vsense.Av Table 1 describes the function of each pin. Their...