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Test Procedure for the NCP345/6 Evaluation Board
8/27/03
Figure 1: NCP345/6 Demo Board Assembly Drawing
Refer to Table 1 for bolded test values in the following procedure.
1) Connect jumper to J3.
2) Connect jumpers between CNTRL and – pins on J5.
3) Connect 50 Ohms to J2 if D3 is unpopulated, otherwise connect to J4.
4) Apply V1 to J1 + and – pins.
5) Measure voltage at J2 if D3 is unpopulated, otherwise connect to J4. It should equal V2.
6) Apply V3 to J1 + and – pins.
7) Wait 1 second.
8) Measure voltage at J2 if D3 is unpopulated, otherwise connect to J4. It should equal V4.
9) Apply V1 to J1 + and – pins.
10) Apply V5 between Vp on J5 and any open - pin on the board.
11) Connect jumper from step (2) between the CNTRL and + pins on J5.
12) Measure voltage at J2 if D3 is unpopulated, otherwise connect to J4. It should equal V4.
Table 1: Test Values
NCP345SNT1 NCP346SN1T1 NCP346SN2T1 Unit
V1
6 4 5 V
V2*
6 4 5 V
V3
8 5 6 V
V4**
0 0 0 V
V5
2 2 2 V
* This is the power supply voltage minus the voltage drops across Q1 and D1. It might measure slightly
lower than V1.
** Since C1 is a large capacitor a load (specified in step (3) is required for the voltage to decay to 0V in a
timely manner for functional testing.
