NCP702SN18T1GEVB Test Procedure Datasheet by onsemi

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Test Procedure for the NCP702SN18T1GEVB Evaluation
Board
04-JUN-12
Test Setup 1:
Figure 1. Test setup for the measurements of basic regulation
characteristics
Required Equipment:
2 x Voltmeters
DC Power Supply Max. 5.5V
Electronic Load
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Test Procedure for the Measurement of Line Regulation parameter
using Test Setup 1:
1. Connect the test setup as shown on Figure 1,
2. Set the electronic load for the required load current e.g. IOUT = 10mA,
3. Apply the required minimum input voltage e.g. VIN_MIN = VOUT_NOM + 0.3V (1),
4. Note the output voltage reading VOUT1 indicated by VOTLMETER2,
5. Apply the required maximum input voltage e.g. VIN_MAX = VOUT_NOM + 1.3V (1),
6. Note the output voltage reading VOUT2 indicated by VOTLMETER2,
7. Calculate the Line Regulation parameter as:
RegLINE = (VOUT2 VOUT1) / (VIN_MAX VIN_MIN) [V/V]
8. Turn off the electronic load. Turn off the input power supply,
9. End of the test.
Test Procedure for the Measurement of Load Regulation parameter
using Test Setup 1:
1. Connect the test setup as shown on Figure 1,
2. Set the electronic load for the required minimum output current e.g. IOUT_MIN = 1mA,
3. Apply the desired input voltage e.g. VIN = VOUT_NOM + 0.3V (1),
4. Note the output voltage reading VOUT1 indicated by VOTLMETER2,
5. Set the electronic load for the required maximum output current e.g. IOUT_MAX =
150mA,
6. Note the output voltage reading VOUT2 indicated by VOTLMETER2,
7. Calculate the Load Regulation parameter as:
RegLOAD = (VOUT2 VOUT1) / (IOUT_MAX IOUT_MIN) [V/A]
5. Turn off the electronic load. Turn off the input power supply,
6. End of the test.
(1) VOUT_NOM is the nominal output voltage level of the regulator. NCP702 operating
VIN must be in the range 2.0V ≤ VIN 5.5V
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Test Setup 2:
Electronic
Load
+ VOUT - VOUT
Electronic
Power Supply
- VIN + VIN
V
VOLTMETER1
Square Pulse
Generator
- VEN + VEN
Oscilloscope
CH1 CH2
Figure 2. Test setup for the measurements of the Enable functionality
Required Equipment:
DC Power Supply Max. 5.5V
Electronic Load, Voltmeter, Oscilloscope
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Test Procedure for the measurements of the Enable functionality
using Test Setup 2:
1. Connect the test setup as shown on Figure 2,
2. Apply the required input voltage e.g. VIN = VOUT_NOM + 0.3V (1)
3. Set the electronic load for the required load current e.g. IOUT = 10mA,
4. Set the square wave generator to generate the following pulse
waveform:
5. Verify with the oscilloscope that the output voltage VOUT turns ON/OFF.
6. Turn off the pulse generator.
7. Turn off the electronic load.
8. Turn off the input power supply
9. End of the test
(1) VOUT_NOM is the nominal output voltage level of the regulator. NCP702 operating VIN
must be in the range 2.0V ≤ VIN ≤ 5.5V
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Test Setup 3:
Electronic
Power Supply
- VIN + VIN
A
VOLTMETER1
NANOAMP
METER
V
VOLTMETER2
V
Figure 3. Test setup for the measurements of the disable current
Required Equipment:
DC Power Supply Max. 5.5V
2 x Voltmeter, Nanoampere meter
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Test Procedure for the measurements of the disable current using
Test Setup 3:
1. Connect the test setup as shown on Figure 3,
2. Apply the required input voltage e.g. so that Voltmeter1 indicates VIN =
VOUT_NOM + 0.3V (1)
3. Verify that the output voltage measured by Voltmeter2 is very close to
0V,
4. Read the disable current measured by the nanoampere meter.
5. Turn off the input power supply
6. End of the test
(1) VOUT_NOM is the nominal output voltage level of the regulator. NCP702 operating VIN
must be in the range 2.0V ≤ VIN ≤ 5.5V.

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