TOP257PN datasheet(38/48 Pages) POWERINT

Part #	TOP257PN

Description	Enhanced EcoSmart짰, Integrated Off-Line Switcher with Advanced Feature Set and Extended Power Range

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Manufacturer	POWERINT [Power Integrations, Inc.]

Direct Link	http://www.powerint.com

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38 / 48 page

Rev. F 01/09

38

TOP252-262

www.powerint.com

Figure 51. Duty Cycle Measurement.

Figure 52. CONTROL Pin I-V Characteristic.

Figure 53. Drain Current Operating Envelope.

Figure 54. TOPSwitch-HX General Test Circuit.

PI-2039-033001

DRAIN

VOLTAGE

HV

0 V

90%

10%

90%

t2

t1

D =

t1

t2

120

100

80

40

20

60

0

56

7

8

9

CONTROL Pin Voltage (V)

1

Slope

Dynamic

Impedance

=

0.8

1.3

1.2

1.1

0.9

0.8

1.0

0

01

2

6

8

3

Time ( s)

45

7

0.7

0.6

0.5

0.4

0.3

0.2

0.1

IINIT(MIN)

tLEB (Blanking Time)

PI-4738-071408

5-50 V

S4

40 V

0.1

μF

47

μF

470

Ω

5 W

TOP254-258 Y, all E, L or M Packages (X and V Pins)

P or G Package (M Pin)

470

Ω

0-300 k

Ω

0-60 k

Ω

0-60 k

Ω

0-300 k

Ω

NOTES: 1. This test circuit is not applicable for current limit or output characteristic measurements.

2. For P, G and M packages, short all SOURCE pins together.

D

S

FX

C

V

M

C

CONTROL

TOPSwitch-HX

S1

S5

S3

0-15 V

S2

S

GX

C

CONTROL

TOP259-261 Y (X and V Pins)

5-50 V

0-300 k

Ω

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TOP257PN Datasheet(PDF) 38 Page - Power Integrations, Inc.

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