TOP242F datasheet(38/54 Pages) POWERINT

38 / 54 page

Rev. R 10/20

TOP242-250

www.power.com

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 Figures 54b, 55b and 56b (Current Limit vs. External

Current Limit Resistance) in the Typical Performance Characteristics section. The tolerance specified is only valid at full

current limit.

D. Breakdown voltage may be checked against minimum BV

DSS specification by ramping the DRAIN pin voltage up to but

not exceeding minimum BV

DSS.

E. 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 68, the characteristic graph on CONTROL pin charge current (I

C) vs. DRAIN voltage for low voltage operation

characteristics.

Parameter

Symbol

Conditions

SOURCE = 0 V; T

J = -40 to 125 °C

See Figure 53

(Unless Otherwise Specified)

Min

Typ

Max

Units

OUTPUT (cont.)

ON-State

Resistance

DS(ON)

TOP249

D = 600 mA

J = 25 °C

1.30

1.50

Ω

J = 100 °C

2.15

2.50

TOP250

D = 700 mA

J = 25 °C

1.10

1.28

J = 100 °C

1.85

2.15

OFF-State Drain

Leakage Current

DSS

L, VM = Floating; IC = 4 mA

DS = 560 V; TJ = 125 °C

470

µA

Breakdown

Voltage

DSS

L, VM = Floating; IC = 4 mA

See Note D, T

J = 25 °C

700

Rise Time

Measured in a Typical Flyback

Converter Application

100

Fall Time

SUPPLY VOLTAGE CHARACTERISTICS

DRAIN Supply

Voltage

See Note E

Shunt Regulator

Voltage

C(SHUNT)

C = 4 mA

5.60

5.85

6.10

Shunt Regulator

Temperature Drift

±50

ppm/°C

Control Supply/

Discharge

Current

CD1

Output MOSFET

Enabled

X, VL, VM = 0 V

TOP242-245

1.0

1.6

2.5

TOP246-249

1.2

2.2

3.2

TOP250

1.3

2.4

3.65

CD2

Output MOSFET

Disabled

X, VL, VM = 0 V

0.3

0.6

1.3

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