LT3798 datasheet(5/20 Pages) LINER

Part #	LT3798

Description	Isolated No Opto-Coupler Flyback Controller

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT3798

5

3798f

TYPICAL PERFORMANCE CHARACTERISTICS

INTVCC vs Temperature

INTVCC vs VIN

VIN Shunt Voltage vs Temperature

Maximum Shunt Current

vs Temperature

TA = 25°C, unless otherwise noted.

Leakage Inductance Blanking Time

vs SENSE Current Limit Threshold

TEMPERATURE (°C)

–50

9.5

9.75

10.25

10.5

0

50

75

10

–25

25

100 125 150

3798 G08

25mA LOAD

10mA LOAD

NO LOAD

VIN (V)

515

25

30

10

20

35

40

3798 G09

9

9.2

9.4

9.6

9.8

10

10.2

TEMPERATURE (°C)

–50

0

50

75

–25

25

100 125 150

3798 G10

39

39.5

40

40.5

41

41.5

42

ISHUNT = 1mA

TEMPERATURE (°C)

–50

0

50

75

–25

25

100 125 150

3798 G11

5

6

7

8

9

10

SENSE CURRENT LIMIT THRESHOLD (mV)

0

60

80

20

40

100

120

3798 G12

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

Output Voltage

vs Input Voltage

VOUT vs Temperature

Output Current

vs Input Voltage

VIN (VAC)

90

23.6

23.8

24.6

24.2

170

210 230

24.4

24

150

130

110

190

250 270

3798 G13

PAGE 17 SCHEMATIC:

UNIVERSAL

VIN (VAC)

90

0.90

0.95

1.00

1.05

1.10

210 230

130

110

170

150

190

250 270

3798 G14

PAGE 17 SCHEMATIC:

UNIVERSAL

VOUT = 22V

TEMPERATURE (°C)

–50

23

24

24.5

25

0

50

75

23.5

–25

25

125

100

150

3798 G012a

PAGE 17 SCHEMATIC:

UNIVERSAL

VAC = 120V

VAC = 220V

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