LNK501P datasheet(13/20 Pages) POWERINT

13 / 20 page

9/02

LNK501

NOTES:

A. For specifications with negative values, a negative temperature coefficient corresponds to an increase in magnitude with

increasing temperature, and a positive temperature coefficient corresponds to a decrease in magnitude with increasing

temperature.

B. Breakdown voltage may be checked against minimum BV

DSS specification by ramping the DRAIN pin voltage up to but not

exceeding minimum BV

DSS.

C. I

C is increased gradually to obtain maximum current limit at di/dt of 90 mA/µs. Increasing IC further would terminate the cycle

through duty cycle control.

D. This parameter is normalized to I

DCT to correlate to power supply output current (it is multiplied by IDCT(nominal)/IDCT).

E. It is possible to start up and operate

LinkSwitch at DRAIN voltages well below 36 V. However, the CONTROL pin charging

current is reduced, which affects start-up time, auto-restart frequency, and auto-restart duty cycle. Refer to the characteristic

graph on CONTROL pin charge current (I

C) vs. DRAIN voltage (Figure 13) for low voltage operation characteristics.

Conditions

(Unless Otherwise Specified)

SOURCE = 0 V

; T

J = -40 °C to 125 °C

See Figure 12

Min

Typ

Max

Parameter

Symbol

Units

OUTPUT

ON-State

Resistance

J = 25 °C

J = 100 °C

DS(ON)

D = 25 mA

See Note E

See Note B, V

C = 6.2 V

D = 560 V, TA = 125 °C

See Note B

C = 6.2 V, TA = 25 °C

OFF-State

Current

Breakdown

Voltage

DRAIN Supply

Voltage

700

Ω

µA

DSS

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