SBOS878D July 2017 – October 2019 TSV911 , TSV912 , TSV914

PRODUCTION DATA.

- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information

Refer to the PDF data sheet for device specific package drawings

- DBV|5
- DCK|5

- DCK|5

The transfer function of the circuit in Figure 35 is shown in Equation 1.

Equation 1.

The load current (I_{LOAD}) produces a voltage drop across the shunt resistor (R_{SHUNT}). The load current is set from 0 A to 1 A. To keep the shunt voltage below 100 mV at maximum load current, the largest shunt resistor is defined using Equation 2.

Equation 2.

Using Equation 2, R_{SHUNT} is 100 mΩ. The voltage drop produced by I_{LOAD} and R_{SHUNT} is amplified by the TSV91x to produce an output voltage of approximately 0 V to 4.95 V. The gain required by the TSV91x to produce the necessary output voltage is calculated using Equation 3:

Equation 3.

Using Equation 3, the required gain is calculated to be 49.5 V/V, which is set with resistors R_{F} and R_{G}. Equation 4 is used to size the resistors, R_{F} and R_{G}, to set the gain of the TSV91x to 49.5 V/V.

Equation 4.

Selecting R_{F} as 165 kΩ and R_{G} as 3.4 kΩ provides a combination that equals roughly 49.5 V/V. Figure 36 shows the measured transfer function of the circuit shown in Figure 35.