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LTC4255 数据表(PDF) 3 Page - Linear Technology

部件名 LTC4255
功能描述  Quad Network Power Controller with I2C Compatible Interface
Download  16 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC4255 数据表(HTML) 3 Page - Linear Technology

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LTC4255
3
4255f
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 12V, VEE = –48V, AGND = DGND = 0V
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VILD
Digital Input Low Voltage
SCL, SDA
q
0.8
V
VIHD
Digital Input High Voltage
SCL, SDA
q
2.4
V
RPU
AD0 to AD4 Pullup Resistors to 5V
30
50
90
k
AC Characteristics
tCL
Current Limit Filter Time
B5 = 0, B4 = 0, Figure 2
q
4.8
6
7.2
ms
B5 = 0, B4 = 1
q
9.6
12
14.4
ms
B5 = 1, B4 = 0
q
19.2
24
28.8
ms
B5 = 1, B4 = 1
q
76.8
96
115.2
ms
tOCD
Open-Circuit Enable Delay
B7 = 0, B6 = 0
q
50
62
74
ms
After Power_OK
B7 = 0, B6 = 1
q
104
130
156
ms
B7 = 1, B6 = 0
q
213
267
320
ms
B7 = 1, B6 = 1
q
433
541
649
ms
tOCF
Open-Circuit Filter Time
Figure 3
q
9.6
18
28.8
ms
tOD
Turn-On Delay Time
Figure 4
q
9.6
18
28.8
ms
DCR
Retry Duty Cycle
B3 = 0
q
0.78
0.83
0.89
%
B3 = 1
q
5.5
6
6.7
%
tSCLK
Clock Frequency
(Note 3)
q
400
kHz
t1
Bus Free Time
Figure 1 (Notes 3, 4)
q
1.3
µs
t2
Start Hold Time
Figure 1 (Notes 3, 4)
q
600
ns
t3
SCL Low Time
Figure 1 (Notes 3, 4)
q
1.3
µs
t4
SCL High Time
Figure 1 (Notes 3, 4)
q
600
ns
t5
Data Hold Time
Figure 1 (Notes 3, 4)
q
150
ns
t6
Data Setup Time
Figure 1 (Notes 3, 4)
q
200
ns
t7
Start Setup Time
Figure 1 (Notes 3, 4)
q
600
ns
t8
Stop Setup Time
Figure 1 (Notes 3, 4)
q
600
ns
t9
Stop to Fault Clear
Figure 1 (Notes 3, 4)
q
300
ns
tr
SCL, SDA Rise Time
Figure 1 (Notes 3, 4)
q
20
300
ns
tf
SCL, SDA Fall Time
Figure 1 (Notes 3, 4)
q
20
150
ns
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 3: Guaranteed by design, not subject to test.
Note 4: Values referred to VILD and VIHD.
Note 5: A Zener diode clamps the relay drivers at 18V (RELAY 1-4).


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