lnk623 Power Integrations, Inc., lnk623 Datasheet - Page 15

• Manufacturer Part Number: lnk623
• Description: Energy-efficient, Off-line Switcher With Accurate Primary-side Constant-voltage Cv Control
• Manufacturer: Power Integrations, Inc.

Figure 19. Test Set-up for Feedback Pin Measurements.
Figure 20. Test Set-up for Leakage and Breakdown Tests.
www.powerint.com
1) Raise V
2) Raise V
3) Apply 1.6 V at V
BP
IN
until cycle skipping occurs at V
voltage from 0 V to 6.2 V, down to 4.5 V, up to 6.2 V
5 F
V
IN
IN
and measure t
+
To measure BV
1) Close S1, open S2
2) Power-up V
3) Open S1, close S2
4) Measure I/V characteristics of Drain pin using the curve tracer
50 k
16 V
V
+
IN
6.2 V
+
10 k
4 k
FB
IN
delay from start of cycle falling edge to the next falling edge
DSS
10 F
source (16 V)
, I
DSS1
OUT
LinkSwitch-CV
, and I
to measure V
1 F
FB
BP
D
DSS2
S
S
S
S
follow these steps:
S1
FBth
.1 F
S2
LinkSwitch-CV
BP
FB
D
Tracer
Curve
500
PI-5202-073108
S
S
S
S
V
OUT
+
2 V
LNK623-626
PI-5203-071408
Rev. C 12/08
15