lnk302 Power Integrations, Inc., lnk302 Datasheet - Page 12

• Manufacturer Part Number: lnk302
• Description: Lowest Component Count, Energy-ef?cient Off-line Switcher Ic
• Manufacturer: Power Integrations, Inc.

Rev. H 12/06
NOTES:
A. Total current consumption is the sum of I
B Since the output MOSFET is switching, it is diffi cult to isolate the switching current from the supply current at the
C. See Typical Performance Characteristics section Figure 14 for BYPASS pin start-up charging waveform.
D. This current is only intended to supply an optional optocoupler connected between the BYPASS and FEEDBACK
E. For current limit at other di/dt values, refer to Figure 13.
F. This parameter is guaranteed by design.
G. This parameter is derived from characterization.
H. Auto-restart on time has the same temperature characteristics as the oscillator (inversely proportional to
Figure 7. LinkSwitch-TN General Test Circuit.
Figure 8. LinkSwitch-TN Duty Cycle Measurement.
2-12
12
VOLTAGE
switching) and the sum of I
DRAIN. An alternative is to measure the BYPASS pin current at 6 V.
frequency).
pins and not any other external circuitry.
DRAIN
LNK302/304-306
0 V
HV
90%
t 1
10%
50 V
S2
S1
and I
t 2
DSS
D =
when FEEDBACK pin is shorted to SOURCE (MOSFET switching).
470 Ω
5 W
S1
t 1
t 2
PI-2048-033001
and I
90%
DSS
when FEEDBACK pin voltage is ≥2 V (MOSFET not
S
S
D
FB
BP
S
S
Figure 9. LinkSwitch-TN Output Enable Timing.
(internal signal)
DC
V
DRAIN
t
P
MAX
=
FB
f
OSC
1
470 kΩ
0.1 μF
t P
t EN
S2
50 V
PI-3707-112503
PI-3490-060204