NCP383LMUAJAGEVB_TEST_PROCEDURE - 281 KB

Test Procedure for the NCP383LMUAJAGEVB Evaluation Board
This test procedure is given as an example for 800mA OCP version and EN active high.
Equipments needed:
 Power supply 5V, 3A.
 1 potentiometer 100Ω, 10W.
 1 oscilloscope with 3 voltage probe and 1 current probe.
Set-up
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VCC = 5V
VIN=3.3V
Device disable, EN=5V with ENABLE H/ENABLE L switch.
Connect R3, R4 to VCC (Flag pull-up) with FLAG1&FLAG2 PULL UP jumper.
Connect potentiometer between OUT1 or OUT2 and GND pin.
Turn-on sequence
 Enable device, EN=0V with ENABLE H/ENABLE L switch.
Over current protection
 Sense IN (Yellow), OUT (Blue), FLAG (Green) voltage and IOUT (Purple).
 Enable device, EN=5V with ENABLE H/ENABLE L switch.
 Decrease resistance value of the potentiometer until FLAG goes to 0V.
Regulation mode
 Sense IN (Yellow), OUT (Blue), FLAG (Green) voltage and IOUT (Purple).
 Enable device, EN=5V with ENABLE H/ENABLE L switch.
 Decrease resistance value of the potentiometer until regulation mode occurs.
Turn off
 Disable device, EN1&2=5V with ENABLE H/ENABLE L switch.
 Remove Vin voltage
 Remove Vcc voltage
1/24/2014
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1/24/2014
2
www.onsemi.com