LT1952EGN(RevD) データシートの表示（PDF） - Linear Technology

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LT1952EGN
(Rev.:RevD)

Single Switch Synchronous Forward Controller

Linear Technology 

TYPICAL PERFORMANCE CHARACTERISTICS

LT1952/LT1952-1

FB Voltage vs Temperature

1.25

1.24

1.23

1.22

1.21

1.20

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1952 G01

VIN Start-up Current

vs Temperature

600

SD_VSEC = 1.4V

550

500

LT1952

450

400

350

LT1952-1

300

250

200

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1952 G04

SD_VSEC Pin Current

vs Temperature

15

PIN CURRENT BEFORE

PART TURN ON

10

5

0

–50 –25

0mA PIN CURRENT AFTER

PART TURN ON

0 25 50 75 100 125

TEMPERATURE (°C)

1952 G07

Switching Frequency

vs Temperature

245

230

215

200

185

170

155

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1952 G02

VIN IQ vs Temperature

6.5

OC = OPEN

6.0

5.5

5.0

4.5

4.0

3.5

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1952 G05

VIN Turn ON/OFF Voltage

vs Temperature

18

16

LT1952 VIN TURN ON VOLTAGE

14

12

10

LT1952 VIN TURN OFF VOLTAGE

8

LT1952-1 VIN ON LT1952-1 VIN OFF

6

–50 –25

0 25 50 75 100 125

TEMPERATURE (°C)

1952 G08

VIN Shutdown Current

vs Temperature

500

VIN = 15V

450 SD_VSEC = 0V

400

350

300

250

200

150

100

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1952 G03

SD_VSEC Turn ON Threshold

vs Temperature

1.42

1.37

1.32

1.27

1.22

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1952 G06

COMP Active Threshold

vs Temperature

1.6

RISENSE = 0k

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1952 G09

19521fd

5

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