Linear Technology LTC4260, Техническое описание

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LTC4260
6
4260fc
For more information www.linear.com/LTC4260
Typical perForMance characTerisTics
T
A
= 25°C, V
DD
= 48V unless otherwise noted.
I
DD
vs V
DD
UV Low-High Threshold
vs Temperature
UV Hysteresis vs Temperature
ON, BD�PRST Low-High
Threshold vs Temperature
ON, BD�PRST Hysteresis
vs Temperature
INTV
CC
vs I
LOAD
Current Limit Sense Voltage
vs FB Voltage
Current Limit Propagation Delay
vs Sense Voltage
TIMER Pull-Up Current
vs Temperature
V
DD
(V)
0
I
DD
(mA) 2.0
85°C
25°C
2.5
80
4260 G01
1.5
1.0
20
40
60 100
3.0
–40°C
TEMPERATURE (°C)
–50
3.46
UV LOW-HIGH THRESHOLD (V)
3.48
3.50
3.52
3.54
–25 0 25 50
4260 G02
75 100
TEMPERATURE (°C)
–50
0.34
UV HYSTERESIS (V)
0.35
0.36
0.37
0.38
0.39
–25
0 25 50
4260 G03
75 100
TEMPERATURE (°C)
–50
1.220
ON, BD_PRST LOW-HIGH THRESHOLD (V)
1.225
1.230
1.235
1.240
1.245
–25 0 25 50
4260 G04
75 100
TEMPERATURE (°C)
–50
0.10
ON, BD_PRST HYSTERESIS (V) 0.11
0.12
0.13
0.14
0.16
–25 0 25 50
4260 G05
75 100
0.15
TEMPERATURE (°C)
–50
–90
TIMER PULL-UP CURRENT (µA)
–95
–100
–105
–110
–25 0 25 50
4260 G06
75 100
FB VOLTAGE (V)
0
0
CURRENT LIMIT SENSE VOLTAGE (V
DD
– V
SENSE
) (mV)
10
20
30
40
1 2
3
4
4260 G07
50
60
0.5 1.5
2.5
3.5
CURRENT LIMIT SENSE VOLTAGE (V
DD
– V
SENSE
) (mV)
0
0.1
CURRENT LIMIT PROPAGATION DELAY (µs)
1
10
100
1000
50 100 150 200
4260 G08
250 300 350
I
LOAD
(mA)
0 –2 –4 –6 –8 –10
0
INTV
CC
(V)
1
2
3
4
4260 G18
5
6
V
DD
= 48V
V
DD
= 12V
MAX I
LOAD
= 4.5 mA
CAUTION: DRAWING CURRENT
FROM INTV
CC
INCREASES POWER
DISSIPATION AND T
J