General Description
This document explains the function and use of the RTQ6052 evaluation board (EVB), and provides information to enable operation, modification of the evaluation board and circuit to suit individual requirements.
Performance Specification Summary
Summary of the RTQ6052GF Evaluation Board performance specificiaiton is provided in Table 1. The ambient temperature is 25°C.
Table 1. RTQ6052GF Evaluation Board Performance Specification Summary
|
Specification
|
Test Conditions
|
Min
|
Typ
|
Max
|
Unit
|
|
Default Input Voltage
|
Default = 12V
|
2
|
--
|
80
|
V
|
|
Supply Voltage
|
Default = 12V
|
2.9
|
--
|
18
|
V
|
|
Sensing Current
|
|
--
|
0.5
|
--
|
A
|
|
Output Voltage
|
|
--
|
5
|
--
|
V
|
|
Gain
|
|
--
|
100
|
--
|
V/V
|
|
Quiescent Current
|
VOUT = 2V, TA = −40oC to 125oC
|
--
|
--
|
1200
|
μA
|
Power-up & Measurement Procedure
Suggestion Required Equipments
- DC Power Supply (Chroma, 62006P-100-25)
- Electronic load capable of 6A
- Function Generator
- DC Meter
- Oscilloscope
Quick Start Procedures
1. Connect a short line from GND (golden pin) to GND (test pin).
2. Apply VCC = 12V input power supply (2.9V < VCC < 18V) to VCC and GND terminals.
3. Apply VIN+ = 12V input power supply (2V < VIN+ < 80V) to VIN+ and GND terminals.
4. The default sense resistance is 100mΩ.
5. Connect an external load to VIN- and GND terminals, and keep loading current = 0.5A.
6. Measure the sense voltage (approximately 50mV) between VIN+ and VIN-.
7. Measure the output voltage (approximately 5V) between VOUT and GND.
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.
|
Test point
|
Function
|
|
VCC
|
Power input test point.
|
|
OUT
|
Output Voltage test point.
|
|
CMPI
|
Comparator input test point.
|
|
GND
|
Ground.
|
|
#RESET
|
Reset input pin.
|
|
CMPO
|
Open-drain comparator output.
|
|
VIN-
|
Negative current-sensing input.
|
|
VIN+
|
Positive current-sensing input.
|
|
JP1
|
VCC to ground test point.
|
|
JP2
|
RESET jumper. Connect RESET to ground or pull high to VCC.
|
|
SW1
|
RESET control switch. Connect RESET to ground or pull high to VCC.
|
Bill of Materials
|
Reference
|
Count
|
Part Number
|
Value
|
Description
|
Package
|
Manufacturer
|
|
C1, C2, C5
|
3
|
GRM188R71H104KA93D
|
0.1µF/25V/X7R/0603
|
Capacitor, Ceramic
|
0603
|
MURATA
|
|
R1, R2
|
2
|
RTT05000JTP
|
0/0805
|
Resistor
|
0805
|
RALEC
|
|
R3, R4
|
2
|
RTT031001FTP
|
1k/0603
|
Resistor
|
0603
|
RALEC
|
|
R5
|
1
|
WR06X1003FTL
|
100k/0603
|
Resistor
|
0603
|
WALSIN
|
|
R6
|
1
|
RTT034701FTP
|
4.7k/0603
|
Resistor
|
0603
|
RALEC
|
|
RSEN1
|
1
|
RTT25R100FTE
|
0.1
|
Resistor
|
2512
|
RALEC
|
|
U1
|
1
|
RTQ6052GF
|
RTQ6052GF
|
CSOP
|
MSOP-8
|
RICHTEK
|
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
|
Gain Error with Power Supply Measurement
|
Gain Error with Temperature Measurement
|
|
|
|
|
Offset Voltage with Temperature Measurement
|
Output Error with Common-Mode Measurement
|
|
|
|
|
#RESET signal = Low, CMPO is dominated by CMPI and 0.6V
|
Output Voltage vs. Sense Voltage
|
|
|
|
Evaluation Board Layout
Figure 1. Top View
Figure 2. Bottom View