LTC3803-5 datasheet(4/20 Pages) LINER

Part #	LTC3803-5

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

4

3798f

TYPICAL PERFORMANCE CHARACTERISTICS

VREF vs Temperature

VREF vs VIN

SENSE Current Limit Threshold

vs Temperature

Minimum Oscillator Frequency

vs Temperature

Backup Oscillator Frequency

vs Temperature

Maximum Oscillator Frequency

vs Temperature

EN/UVLO Threshold

vs Temperature

EN/UVLO Hysteresis Current

vs Temperature

VIN IQ vs Temperature

TA = 25°C, unless otherwise noted.

TEMPERATURE (°C)

–50

0

50

75

–25

25

100 125 150

3798 G01

1.2

1.22

1.26

1.24

1.28

1.3

RISING

FALLING

TEMPERATURE (°C)

–50

0

50

75

–25

25

100 125 150

3798 G02

10

10.5

11

11.5

12

TEMPERATURE (°C)

–50

0

50

75

–25

25

100 125 150

3798 G03

0

20

10

30

40

60

50

100

90

80

70

VIN = 12V

VIN = 24V

TEMPERATURE (°C)

–50

1.900

1.925

1.975

2.000

2.025

2.100

2.075

0

50

75

1.950

2.050

–25

25

100 125 150

3798 G05

VIN = 24V WITH NO LOAD

VIN = 24V WITH 200μA LOAD

VIN (V)

10

1.95

1.96

1.98

1.99

2

2.01

2.05

2.03

2.04

1.97

2.02

15

25

20

30

35

40

3798 G05

NO LOAD

200μA LOAD

TEMPERATURE (°C)

–50

0

20

60

80

100

120

0

50

75

40

–25

25

100 125 150

3798 G06

MAX ILIM

MIN ILIM VIN_SENSE = 34μA

MIN ILIM VIN_SENSE = 21μA

TEMPERATURE (°C)

–50

120

145

195

220

0

50

75

170

–25

25

100 125 150

3798 G06a

TEMPERATURE (°C)

–50

0

2

3

4

5

0

50

75

1

–25

25

125

100

150

3799 G07

VFB < VOVP

VOVP > VFB

TEMPERATURE (°C)

–50

0

10

15

20

25

0

50

75

5

–25

25

125

100

150

3798 G07a

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LTC3803-5 Datasheet(PDF) 4 Page - Linear Technology

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