参数资料
型号: DC804A-B
厂商: Linear Technology
文件页数: 28/32页
文件大小: 0K
描述: EVAL BOARD FOR LTC4267
设计资源: DC804A Design File
标准包装: 1
主要目的: 电源管理,以太网供电(POE)
嵌入式:
已用 IC / 零件: LTC4267
已供物品:
LTC4267
5
4267fc
Input Current vs Input Voltage
25k Detection Range
Input Current vs Input Voltage
Signature Resistance vs
Input Voltage
Normalized UVLO Threshold vs
Temperature
Power Good Output Low Voltage
vs Current
POUT Leakage Current
Current Limit vs Input Voltage
TYPICAL PERFOR
UW
CE CHARACTERISTICS
A
VPORTN VOLTAGE (V)
0
INPUT
CURRENT
(mA)
0.1
0.2
0.3
0.4
0.5
–2
–4
–6
–8
4267 G01
–10
TA = 25°C
VPORTN VOLTAGE (V)
–12
9.0
INPUT
CURRENT
(mA)
9.5
10.5
11.0
11.5
–14
–16
4267 G03
10.0
–18
–20
–22
12.0
85°C
–40°C
CLASS 1 OPERATION
VPORTN VOLTAGE (V)
0
INPUT
CURRENT
(mA)
10
20
30
40
50
–10
–20
–30
–40
4267 G02
–50
–60
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
TA = 25°C
VPORTN VOLTAGE (V)
0
INPUT
CURRENT
(mA)
1
2
3
–45
–55
4267 G04
–60
–40
–50
EXCLUDES ANY LOAD CURRENT
TA = 25°C
VPORTN VOLTAGE (V)
–1
22
V1:
V2:
SIGNATURE
RESISTANCE
(k
)
23
25
26
27
–3
–5
4267 G05
24
–7
–9
–6
–10
–2
–4
–8
28
RESISTANCE =
DIODES: S1B
TA = 25C
=
V
I
V2 – V1
I2 – I1
IEEE UPPER LIMIT
IEEE LOWER LIMIT
LTC4267 + 2 DIODES
LTC4267 ONLY
CURRENT (mA)
0
V
PG_OUT
(V)
2
3
8
4267 G07
1
0
2
4
6
10
4
TA = 25°C
POUT PIN VOLTAGE (V)
0
V
OUT
CURRENT
(A)
30
60
120
90
20
40
4267 G08
60
VIN = 0V
TA = 25°C
VPORTN VOLTAGE (V)
–40
CURRENT
LIMIT
(mA)
200
–60
4267 G09
100
–45
–50
–55
400
300
85°C
– 40°C
HIGH CURRENT MODE
LOW CURRENT MODE
TEMPERATURE (C)
–40
–2
NORMALIZED
UVLO
THRESHOLD
(%)
–1
0
1
2
–20
0
20
40
4267 G06
60
80
APPLICABLE TO TURN-ON
AND TURN-0FF THRESHOLDS
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