TPA191A2-SC6R

Overview

The TPA191A2-SC6R is a zero-drift, bi-directional current sense amplifier from 3PEAK. It features a fixed gain of 50 V/V and operates with a supply voltage range of 2.7 V to 36 V. The device supports a wide common-mode input voltage range from −0.3 V to +36 V, independent of the supply voltage. Key electrical specifications include a maximum input offset voltage of ±100 μV at VCM = 2.75 V, a typical quiescent current of 80 μA, and an industrial operating temperature range of −40°C to 125°C. It is housed in an SOT363 (SC70-6) package.

Feature Summary

• Zero-drift architecture ensures high accuracy with low offset voltage and minimal temperature drift for precise current measurements.
• Wide common-mode voltage range allows operation from −0.3 V to 36 V, supporting both high-side and low-side sensing configurations.
• Low quiescent current consumption enables efficient power management in battery-powered and portable applications.
• Integrated rail-to-rail output capability provides full signal swing within the supply voltage limits.

Applications

• High-side and low-side current sensing
• Battery charger systems
• Power management circuits
• Cell phone chargers
• Wireless chargers

Procurement Notes

Verify the specific suffix SC6R corresponds to the SOT363 package and tape-and-reel quantity as defined in the official order information table. Confirm that the A2 designation matches the required 50 V/V gain option for your design. Ensure compatibility with the specified industrial temperature range and supply voltage requirements before finalizing procurement.

Selection Notes

Select the TPA191A2 variant when a fixed gain of 50 V/V is required for the application. This model is suitable for designs needing a wide common-mode range up to 36 V while maintaining low power consumption. Consider the SOT363 package constraints for PCB layout and thermal dissipation. Verify that the input offset voltage and drift characteristics meet the precision requirements of the target current sensing application.

Part Context

The TPA191 series comprises zero-drift, bi-directional current sense amplifiers available in multiple gain options. The TPA191A2 specifically offers a gain of 50 V/V. All variants share the same core architecture, featuring wide common-mode input range and low supply current. The series is designed for high-accuracy current monitoring in various power management and charging applications.

Replacement Considerations

Other members of the TPA191 family, such as TPA191A1, TPA191A3, TPA191A4, TPA191A5, TPA191A6, and TPA191A7, are pin-compatible alternatives with different fixed gains ranging from 20 V/V to 1000 V/V. Select a substitute only if the gain difference is acceptable for the circuit design.

FAQ

Can the TPA191A2 be used for bidirectional current sensing?

Yes, by connecting the REF pin to a reference voltage, typically VS/2, the device can measure both positive and negative voltage drops across the sense resistor.

What is the maximum common-mode voltage supported by this component?

The TPA191A2 supports a common-mode input voltage range from −0.3 V to +36 V, which is independent of the supply voltage.