Now, slowly increase the TFB voltage to approximately 4.4Volts. Return the TFB to 3.0V and the EGS002 should return to normal conditions, including the test setup’s red LED turning off. The test setup’s red LED should turn on to indicate the fan is being activated. Slowly increase the TFB voltage to approximately 3.4Volts. Fan Activation via thermal feedback: (Red LED on Test Setup).At this point, the green LED’s and EGS002 red LED should light up again to indicate normal operation. Turn IFB potentiometer to achieve 0V on IFB. The EGS002 red LED flashes twice, which means Over-Current is occurring. The red LED on the EGS002 will blink and all green LED’s will turn off. Measure the voltage on the IFB pin and slowly turn the IFB variable resistor until the IFB voltage is more than 0.55V. Return the VFB to 3.0V then the EGS002 should return to normal conditions. The red LED flashes three times, which means Over-Voltage has occurred. The red LED on the EGS002 will blink and all the green LED’s will turn off. Now, slowly turn the VFB variable resistor until the VFB voltage is more than 3.15Volts. Return the VFB to 3.0V and the EGS002 should return to normal conditions. When the voltage gets to approximately 2.55Volts, the red LED on the EGS002 will blink four times and all green LED’s should turn off, meaning Under-Voltage has occurred. You will need to wait about 3 seconds before the EGS002 board recognizes the under-voltage condition. Then slowly decrease further towards 2.55Volts. Still on the VFB input, but this time lower the VFB voltage to approximately 2.65Volts. Now we start by changing the voltages at input feedback pins until the LED warning indication appears, as follows: This should bring the EGS002 board back into normal operating conditions. Turn the VFB variable resistor until the VFB voltage pin is 3.0Volts. The green LED’s will all turn off and the red EGS002 LED will flash four times. However, soon the under-voltage condition will be acknowledged by the EGS002 board. This indicates that all input feedback is under normal operating conditions and no errors have been detected. You should see that all the green LEDs are on and also the red LEDs on the EGS002 module are on continuously. Finally, set the TFB variable resistor so that it reads 0V on the TFB pin.Next, set the VFB variable resistor so that it reads 0V on the VFB pin.Set the IFB variable resistor so that it reads 0V on the IFB pin.EGS002 test Download PDF schematic file Preparationīefore inserting the EGS002 into the header and conducting the functional test, first apply power to the circuit above and adjust the variable resistors so that the voltages at the feedback pins is achieved as follows:
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