LT3799IMSE-1(RevA) Просмотр технического описания (PDF) - Linear Technology

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LT3799IMSE-1
(Rev.:RevA)

Offline Isolated Flyback LED Controller with Active PFC

Linear Technology 

LT3799-1

Electrical Characteristics The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 18V, unless otherwise noted.

PARAMETER

FB Pin Bias Current

CTRL1/CTRL2/CTRL3 Pin Bias Current

Max SENSE Current Limit Threshold

SENSE Input Bias Current

Current Loop Voltage Gain

CT Pin Charge Current

CT Pin Discharge Current

CT Pin Low Threshold

CT Pin High Threshold

CT Pin Low Hysteresis

FB Pin High Threshold

DCM Current Turn-On Threshold

Maximum Oscillator Frequency

Minimum Oscillator Frequency

Back-Up Oscillator Frequency

Linear Regulator

INTVCC Regulation Voltage

Dropout (VIN – INTVCC)

Current Limit

Current Limit

Gate Driver

tr GATE Driver Output Rise Time

tf GATE Driver Output Fall Time

GATE Output Low (VOL)

GATE Output High (VOH)

CONDITIONS

(Note 3), FB = 1V

CTRL1/CTRL2/CTRL3 = 1V

Current Out of Pin, SENSE = 0V

∆VCTRL/ ∆VSENSE, 1000pF Cap from COMP+ to COMP–

Falling Threshold

Rising Threshold

Current Out of Pin

COMP+ = 1.2V, VIN_SENSE = 1V

COMP+ = 0V, VIN_SENSE

INTVCC = –10mA, Below VIN Turn-Off Voltage

Below Undervoltage Threshold

Above Undervoltage Threshold

CL = 3300pF, 10% to 90%

CL = 3300pF, 90% to 10%

MIN TYP MAX UNITS

100

600

nA

±25

nA

96

100

106

mV

15

µA

21

V/V

10

µA

200

nA

240

mV

1.25

V

100

mV

1.22 1.25 1.29

V

45

µA

300

kHz

25

kHz

20

kHz

9.8

10

10.4

V

750 1150

mV

12

25

mA

80

120

mA

20

ns

20

ns

0.05

V

INTVCC

V

– 0.05

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 LT3799-1E 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

LT3799-1I is guaranteed to meet performance specifications from –40°C

to 125°C operating junction temperature.

Note 3: Current flows out of the FB pin.

For more information www.linear.com/LT3799-1

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