TOP245F datasheet(39/52 Pages) POWERINT

39 / 52 page

TOP242-250

1/02

Conditions

(Unless Otherwise Specified)

See Figure 53

SOURCE = 0 V

; T

J = -40 to 125 °C

Min

Typ

Max

Parameter

Symbol

Units

SUPPLY VOLTAGE CHARACTERISTICS

5.60

5.85

6.10

±50

1.0

1.6

2.5

1.2

2.2

3.2

1.3

2.4

3.65

0.3

0.6

1.3

ppm/°C

C(SHUNT)

CD1

CD2

See Note D

C = 4 mA

Output

MOSFET Disabled

L, VM = 0 V

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. Guaranteed by characterization. Not tested in production.

C. For externally adjusted current limit values, please refer to Figure 55 (Current Limit vs. External Current Limit

Resistance) in the Typical Performance Characteristics section.

D. It is possible to start up and operate TOPSwitch-GX 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 Figure 67, the characteristic graph on CONTROL pin charge current (I

C) vs. DRAIN voltage

for low voltage operation characteristics.

DRAIN Supply

Voltage

Shunt Regulator

Voltage

Shunt Regulator

Temperature Drift

Control Supply/

Discharge Current

Output

MOSFET Enabled

L, VM = 0 V

TOP242-245

TOP246-249

TOP250

OUTPUT

Rise Time

Fall Time

Measured in a Typical

Flyback Converter Application

100

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