LNK603-606 Datasheet, PDF (13/20 Pages) FERYSTER Inductive Components Manufacturer – Energy-Effi cient, Accurate CV/CC Switcher for Adapters and Chargers

LNK603-606/613-616
V_IN ⁺
+
6.2 V
LinkSwitch-II
FB S
BP S
10 μF
S
D
S
V_OUT
500 Ω
+ _2V
PI-4961-022708
1) Raise V_BP voltage from 0 V to 6.2 V, down to 4.5 V, up to 6.2 V
2) Raise V_IN until cycle skipping occurs at V_OUT to measure V_FBth
3) Reduce V_IN until cycle skipping stops at V_OUT to measure V_FBth-. Cable drop compensaion factor is υ_FB = V_FBth / V_FBth-
4) Apply 1.5 V at V_IN and measure t_FB delay from start of cycle falling edge to the next falling edge
Figure 19. Test Set-up for Feedback Pin Measurements.
5 μF 50 kΩ 10 kΩ
4 kΩ
V_IN
+
16 V
1 μF
LinkSwitch-II
FB S
BP S
.1 μF
S
D
S
S1
S2
Curve
Tracer
To measure BV_DSS, I_DSS1, and I_DSS2 follow these steps:
1) Close S1, open S2
2) Power-up V_IN source (16 V)
3) Open S1, close S2
4) Measure I/V characteristics of Drain pin using the curve tracer
Figure 20. Test Set-up for Leakage and Breakdown Tests.
PI-4962-040308
www.powerint.com
13
Rev. C 06/08