Datasheet > TPA191

TPA191

更新时间： 2024-09-22 17:01:15

品牌	Logo	应用领域
思瑞浦 - 3PEAK		/
页数	文件大小	规格书
18页	1712K
描述
Zero-Drift, Bi-Directional Current Sense Amplifier

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TPA191 数据手册

TPA191

Zero-Drift, Bi-Directional Current Sense Amplifier

Features

Applications

Voltage Offset:

Current Sensing (High−Side/Low−Side)

•

±50 μV (Max) at V_CM= 2.75 V

Battery Charger

–

•

±180 μV (Max) at V_CM= 12 V

Power Management

Wide Common-Mode Voltage: −0.3 V to +36 V

Supply Voltage: 2.7 V to 36 V

Cell Phone Charger

Electrical Cigarette

Wireless Charger

Telecom Equipment

•

Accuracy and Zero-Drift Performance

±1% Gain Error (Max over temperature)

–

0.2 μV/°C Offset Drift (Typ)

–

Description

10 ppm/°C Gain Drift (Max)

The TPA191 series of zero-drift, bi-directional current

sense amplifier can sense voltage drops across shunts at

common-mode voltages from −0.3 V to 36 V, independent

of the supply voltage. Five fixed gains are available:

20 V/V, 50 V/V, 75 V/V, 100 V/V, and 200 V/V. The

integration matched gain resistor network minimizes gain

errors and reduces the temperature drift. The low offset

of the zero-drift architecture enables current sensing with

the maximum drops across the shunt as low as 10-mV

full-scale.

Three Gain Options for Voltage Output

•

TPA191A1: 20 V/V

–

TPA191A2: 50 V/V

–

TPA191A3: 75 V/V

–

TPA191A4: 100 V/V

–

TPA191A5: 200 V/V

–

TPA191A6: 500 V/V

–

TPA191A7: 1000 V/V

–

The TPA191 devices operate from a single 2.7-V to 36-

V power supply, with drawing a typical of 80-μA supply

current. All versions are specified from −40°C 125°C, and

offered in the SOT363 package.

Low Supply Current: 80 μA (Typ)

Rail-to-Rail Output

•

Package: SOT363

Industrial −40°C to 125°C Operating Range

Typical Application Circuit

Vbus =–0.3 ~ 36 V

RSENSE

Load

IN+

IN−

Reference Voltage

V+ = 2.7 ~ 36 V

REF

OUT

ADC

TPA191

GND

CBYPASS

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