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LT4321 数据表(PDF) 3 Page - Linear Technology

部件名 LT4321
功能描述  PoE Ideal Diode Bridge Controller
PDF  12 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LT4321 数据表(HTML) 3 Page - Linear Technology

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LT4321
3
4321f
For more information www.linear.com/LT4321
elecTrical characTerisTics
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.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Range
|IN12-IN36|, |IN45-IN78|, OUTP
l
20
80
V
VUVLO
Undervoltage Lockout
OUTP-OUTN
l
15
17
18
V
IS(DET)
Total Supply Current in Detect Region
OUTP < 10V
l
0.8
5
µA
IS(OFF)
Total Supply Current in Shutdown
OUTP > 12V, EN < VIL and EN > VIH
l
32
60
µA
IS(ON)
Total Operating Supply Current
EN > VIH or EN < VIL, OUTP > 20V
l
0.5
0.8
mA
Top Gate Drive
INn = OUTP + ∆VSD(MAX) + 5mV, 10µA Out of
TGn (Note 3)
l
7.7
9.5
11
V
VBG
Bottom Gate Drive
10µA Out of BGn (Note 3)
l
10
11.5
13
V
Top Gate Pull-Up Current
TGn = INn (Note 3)
l
50
120
250
µA
Top Gate Pull-Down Current
INn = OUTP – 0.25V; TGn – INn = 5V
l
1.25
mA
Bottom Gate Pull-Up Current
BGn < VBG (Note 3)
l
15
30
45
µA
Bottom Gate Pull-Down Current
BGn = 5V
l
3
mA
EN Pull-Up Resistance (Active Low)
OUTP = 55V
l
160
250
310
kΩ
EN Pull-Down Resistance (Active High)
OUTP = 55V
l
160
250
310
kΩ
VIH
Digital Input High
EN, EN
l
2.6
V
VIL
Digital Input Low
EN, EN
l
0.5
V
VENOC
EN Open Circuit Voltage
OUTP = 55V
l
2
2.5
3
V
∆VSD
Topside Forward Regulation Voltage
INn - OUTP
l
2
10
18
mV
Bottom Comparator Turn-On Threshold
INn - OUTN
l
–30
–15
0
mV
Bottom Comparator Turn-Off Threshold
INn - OUTN
l
2
15
30
mV
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, OUTP = 20V to 80V unless otherwise noted.
Note 2: Referenced with respect to OUTN unless otherwise specified.
Note 3: All conditions for external MOSFET turn on must be met. See
Table 1 and Table 2.



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