lt3799 Linear Technology Corporation, lt3799 Datasheet - Page 3

• Manufacturer Part Number: lt3799
• Description: Lt3799 - Offline Isolated Flyback Led Controller With Active Pfc
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
FB Pin Bias Current
CTRL1/CTRL2/CTRL3 Pin Bias Current
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
INTV
Dropout (V
Current Limit
Current Limit
Gate Driver
t
t
GATE Output Low (V
GATE Output High (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 LT3799E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
r
f
PARAMETER
GATE Driver Output Rise Time
GATE Driver Output Fall Time
CC
Regulation Voltage
IN
– INTV
CC
OL
OH
)
)
)
CONDITIONS
(Note 3), FB = 1V
CTRL/CTRL2/CTRL3 = 1V
Current Out of Pin, SENSE = 0V
∆V
Falling Threshold
Rising Threshold
Current Out of Pin
COMP
COMP
INTV
Below Undervoltage Threshold
Above Undervoltage Threshold
C
C
L
L
CTRL
= 3300pF , 10% to 90%
= 3300pF , 90% to 10%
CC
+
+
/∆V
= –10mA
= 1.2V, V
= 0V, V
SENSE
A
IN_SENSE
= 25°C. V
, 1000pF Cap from COMP
IN_SENSE
The
= 1V
l
IN
denotes the specifications which apply over the full operating
= 18V, unless otherwise noted.
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3799I is guaranteed to meet performance specifications from –40°C to
125°C operating junction temperature.
Note 3: Current flows out of the FB pin.
+
to COMP
–
INTV
– 0.05
MIN
1.22
9.8
96
17
80
CC
1.25
1.25
TYP
100
100
200
240
100
300
500
120
15
21
10
45
25
20
10
25
20
20
LT3799
MAX
1.29
10.4
0.05
600
±30
106
900
UNITS
3
3799p
kHz
kHz
kHz
V/V
mV
mV
mV
mV
mA
mA
nA
nA
µA
µA
nA
µA
ns
ns
V
V
V
V
V