LNK353/354

F

2/05

9

Parameter

Symbol

Conditions

SOURCE = 0 V; T

See Figure 7

(Unless Otherwise Specified)

Min

Typ

Max

Units

OUTPUT (cont)

DRAIN Supply

Voltage

50

V

Output Enable

Delay

t

EN

See Figure 9

10

µ

s

Output Disable

Setup Time

t

DST

0.5

µ

s

Auto-Restart

ON-Time

t

AR

T

See Note H

31

ms

Auto-Restart Duty

Cycle

DC

AR

5

%

NOTES:

A. Total current consumption is the sum of I

switching) and the sum of I

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).