High-Side Measurement Current-Shunt Monitor Evaluation Board

General Description

This document provides information on the function and use of the RTQ6050 evaluation board (EVB), as well as instructions for operating and modifying the board and circuit to meet individual requirements. Additionally, it includes details on the schematic diagram, bill of materials, and evaluation board layout.

Performance Specification Summary

Summary of the RTQ6050GF Evaluation Board performance specificiaiton is provided in Table 1. The ambient temperature is 25°C.

Table 1. RTQ6050GF Evaluation Board Performance Specification Summary

Power-up & Measurement Procedure

Suggestion Required Equipments

• RTQ6050GF Evaluation Board
• DC Power Supply (Chroma, 62006P-100-25)
• Electronic load capable of 6A
• Function Generator
• DC Meter
• Oscilloscope

Quick Start Procedures

1. Apply VCC = 12V input power supply (2.9V < VCC < 18V) to VCC and GND terminals.

2. Apply VIN+ = 12V input power supply (2V < VIN+ < 80V) to VIN+ and GND terminals.

3. The default sense resistance is 100mΩ.

4. Connect an external load to VIN- and GND terminals, and keep loading current = 0.5A.

5. Measure the sense voltage (approximately 50mV) between VIN+ and VIN-.

6. Measure the output voltage (approximately 1V) between VOUT and GND.

Comparator Input, R3, and R4

The RTQ6050 devices incorporate an open-drain comparator. This comparator typically has 1.3μs (typical) response time. The output of the comparator latches and is reset through the #RESET pin. The negative terminal is connected to a 0.6V internal reference, and the positive comparator input is connected to the CMPI pin of the device. Adjust R3 and R4 (show in EVB schematic) to set the comparator trip point for the intended application, where CMPI = (OUT × R4) / (R3 + R4) = 0.6V.

Detailed Description of Hardware

Headers Description and Placement

Carefully inspect all the components used in the EVB according to the following Bill of Materials table, and then make sure all the components are undamaged and correctly installed. If there is any missing or damaged component, which may occur during transportation, please contact our distributors or e-mail us at evb_service@richtek.com.

Test Points

The EVB is provided with the test points and pin names listed in the table below.

Bill of Materials

Typical Applications

EVB Schematic Diagram

Note:

1. Do not hot-plug input voltage and supply voltage on the boar. If hot-plugging is required, add ~100µF electrolytic capacitor at the input.

2. All the stated input and output capacitor values are the effective capacitances, including any de-rating effect, like a DC Bias. The stability of the converter may be impacted when using small size MLCC output capacitors, which may have much lower capacitance at the application DC output voltage than the rated value.

Measurement Results

Evaluation Board Layout

Figure 1. Top View

Figure 2. Bottom View