LNK306 データシートの表示（PDF） - Unspecified

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LNK306

Lowest Component Count, Energy-Efficient Off-Line Switcher IC

Unspecified 

LNK302/304-306

NOTES:

A. Total current consumption is the sum of IS1 and IDSS when FEEDBACK pin voltage is ≥2 V (MOSFET not

switching) and the sum of IS2 and IDSS when FEEDBACK pin is shorted to SOURCE (MOSFET switching).

B Since the output MOSFET is switching, it is difficult to isolate the switching current from the supply current at the

DRAIN. An alternative is to measure the BYPASS pin current at 6 V.

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

pins and not any other external circuitry.

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

frequency).

S1

50 V

470 Ω

5W

D FB

BP

S

S

S

S

470 kΩ

S2

0.1 μF

50 V

Figure 7. LinkSwitch-TN General Test Circuit.

PI-3490-060204

t2

t1

HV 90%

90%

DRAIN

VOLTAGE

0V

10%

D = t1

t2

PI-2048-033001

Figure 8. LinkSwitch-TN Duty Cycle Measurement.

21-122

Rev. H 12/06

DCMAX

(internal signal)

tP

FB

VDRAIN

tEN

1

t=

P fOSC

Figure 9. LinkSwitch-TN Output Enable Timing.

PI-3707-112503

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