LT3512 Просмотр технического описания (PDF) - Linear Technology

Номер в каталоге

Компоненты Описание

Список матч

LT3512

Monolithic High Voltage Isolated Flyback Converter

Linear Technology 

LT3512

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 24V unless otherwise noted.

PARAMETER

TC Current into RREF

BIAS Pin Voltage

CONDITIONS

RTC = 53.6k

Internally Regulated

MIN TYP MAX UNITS

9.5

μA

3

3.1

3.2

V

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LT3512E is guaranteed to meet performance specifications

from 0°C to 125°C junction temperature. Specifications over the –40°C

to 125°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LT3512I is guaranteed to meet performance specifications from –40°C to

125°C operating junction temperature range. The LT3512H is guaranteed

over the full –40°C to 150°C operating junction temperature range. High

junction temperatures degrade operating lifetimes. Operating lifetime is

derated at junction temperatures greater than 125°C.

Note 3: Current flows out of the RREF pin.

Note 4: The SW pin is rated to 150V for transients. Operating waveforms

of the SW pin should keep the pedestal of the flyback waveform below

100V as shown in Figure 5.

TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.

Output Voltage

5.25

VIN = 48V

5.20

5.15

5.10

5.05

5.00

4.95

4.90

4.85

4.80

4.75

–50 –25 0 25 50 75 100 125 150

TEMPERATURE (°C)

3512 G01

Switch VCESAT

2000

1600

1200

800

400

0

0

100 200 300 400 500

SWITCH CURRENT (mA)

3512 G04

Quiescent Current

8

6

4

2

0

–50 –25

VIN = 24V

VIN = 48V

VIN = 100V

0 25 50 75 100 125 150

TEMPERATURE (°C)

3512 G02

Switch Current Limit

800

MAXIMUM CURRENT LIMIT

700

600

500

400

300

200

MINIMUM CURRENT LIMIT

100

0

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

3512 G05

BIAS Pin Voltage

4.0

3.5

3.0

2.5

2.0

–50 –25

VIN = 24V, 10mA

VIN = 24V, NO LOAD

0 25 50 75 100 125 150

TEMPERATURE (°C)

3512 G03

Quiescent Current vs VIN

5

4

3

2

1

0

0

20

40

60

80 100

VOLTAGE (V)

3512 G06

3512f

3

Share Link: