Test Procedure for the NCV8664 Evaluation Board

Test Procedure for the NCV8664 Evaluation Board
5.16.2007
Table of required equipment:
Measurement equipment description
Resistive Load
Multimeters
NCV8664 Demo Board
DC Power Supply
Concrete example
Agilent 6060B
Keithley 2000
Agilent 6812B
Quantity
1
2
1
1
Please follow these steps during the first start of the NCV8664 evaluation board:
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Dropout Voltage Verification Steps
1. Connect circuit as shown in Figure 1.
2. Set Vin= 13.5 V, Record Vout.
3. Reduce Vin until Vout has dropped by 100mV.
4. Subtract Vout from Vin. Resulting Voltage is Dropout Voltage.
NCV8664 Dropout vs. Output Current
0.4
0.35
NCV8664 Demo Board
DC Power Supply
I
Vin
NCV8664
Cin
Vout
Dropout Voltage (V)
0.3
O
Cout
GND
+
DC Voltmeter
Load
+
-
DC
Voltmeter
0.25
0.2
0.15
0.1
0.05
0
0
G
Figure 1- Dropout Voltage Test Setup
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50
100
150
Output Current (m A)
200
Quiescent Current Verification Steps
1. Connect circuit as shown in Figure 3.
2. Set Vin= 13.5 V.
3. Subtract Output Current from Input Current.
Current Consum ption vs. Output Current
10
9
Current Consumption (mA)
8
7
6
5
4
3
2
1
Vin = 13.5 V
0
0
50
100
150
Output Current (m A)
Figure 3. Quiescent Current Verification Setup
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200
Output Voltage Verification Steps
1. Connect circuit as shown in Figure 4.
2. Set output load to 100 Ohms, Set Vin= 0 V, Record Vout.
3. Increase Vin, measure Vout.
Input Voltage vs. Output Voltage
6
NCV8664 Demo Board
I
Vin
NCV8664
Cin
Vout
5
O
Cout
GND
+
DC Voltmeter
Load
+
-
DC
Voltmeter
Output Voltage (V)
DC Power Supply
4
3
2
1
G
RL= 100 Ohms
0
0
10
20
30
Input Voltage (V)
Figure 4. Quiescent Current Verification Setup
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40